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Form 8-K/A

sec.gov

8-K/A — Third Coast Bancshares, Inc.

Accession: 0001193125-26-161692

Filed: 2026-04-17

Period: 2026-02-01

CIK: 0001781730

SIC: 6036 (SAVINGS INSTITUTIONS, NOT FEDERALLY CHARTERED)

Item: Financial Statements and Exhibits

Documents

8-K/A — d306467d8ka.htm (Primary)

EX-23.1 (d306467dex231.htm)

EX-99.1 (d306467dex991.htm)

EX-99.2 (d306467dex992.htm)

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8-K/A

8-K/A (Primary)

Filename: d306467d8ka.htm · Sequence: 1

8-K/A

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K/A

(Amendment No. 1)

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): February 1, 2026

THIRD COAST BANCSHARES, INC.

(Exact name of Registrant as Specified in Its Charter)

Texas

001-41028

46-2135597

(State or Other Jurisdiction

of Incorporation)

(Commission

File Number)

(IRS Employer

Identification No.)

20202 Highway 59 North

Suite 190

Humble, Texas

77338

(Address of Principal Executive Offices)

(Zip Code)

Registrant’s Telephone Number, Including Area Code: 281 446-7000

Not Applicable

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading

Symbol(s)

Name of each exchange

on which registered

Common stock, par value $1.00 per share

TCBX

New York Stock Exchange

Indicate by check

NYSE Texas

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Explanatory Note

On February 2, 2026, Third Coast Bancshares, Inc. (the “Company”) filed with the Securities and Exchange Commission a Current Report on Form 8-K (the “Initial 8-K”) to disclose that it had completed its merger (the “Merger”) with Keystone Bancshares, Inc. (“Keystone”), a Texas corporation, pursuant to the terms of the Agreement and Plan of Reorganization, dated as of October 22, 2025, by and among the Company, Arch Merger Sub, Inc., a Texas corporation and a wholly owned subsidiary of the Company, and Keystone effective February 1, 2026.

This Form 8-K/A amends the Initial 8-K to provide financial statements and pro forma financial information for the Merger that are described in parts (a) and (b) of Item 9.01 below. Except as provided in this Form 8-K/A, the Initial 8-K remains unchanged.

Item 9.01

Financial Statements and Exhibits.

(a) Financial statements of businesses acquired.

The audited consolidated balance sheets of Keystone as of December 31, 2025 and 2024, and the related consolidated statements of income, comprehensive income, changes in stockholders’ equity and cash flows for each of the two years in the period ended December 31, 2025, and the accompanying notes and the related Report of Independent Auditors, required by this item are included as Exhibit 99.1 and incorporated by reference herein.

(b) Pro forma financial information.

The unaudited pro forma condensed consolidated combined balance sheet as of December 31, 2025 and the unaudited pro forma condensed consolidated combined statement of income for the year ended December 31, 2025, required by this item are included as Exhibit 99.2 and incorporated by reference herein.

(d) Exhibits.

Exhibit

Number

Description of Exhibit

23.1

Consent of Whitley Penn LLP.

99.1

Audited consolidated financial statements of Keystone as of December 31, 2025 and 2024, and for each of the two years in the period ended December 31, 2025 as well as the accompanying notes and the related Report of Independent Auditors.

99.2

Unaudited pro forma condensed consolidated combined balance sheet as of December 31, 2025 and unaudited pro forma condensed consolidated combined statement of income for the year ended December 31, 2025.

104

Cover Page Interactive Data File (formatted as inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

THIRD COAST BANCSHARES, INC.

Date: April 17, 2026

By:

/s/ R. John McWhorter

R. John McWhorter

Chief Financial Officer

EX-23.1

EX-23.1

Filename: d306467dex231.htm · Sequence: 2

EX-23.1

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the inclusion in this Current Report on Form 8-K/A of Third Coast Bancshares, Inc. of our report dated

April 14, 2026, relating to the consolidated financial statements of Keystone Bancshares, Inc. and Subsidiary as of and for the years ended December 31, 2025 and 2024.

We further consent to the incorporation by reference in the Registration Statements Nos. 333-293624, 333-261540 and 333-265993 on Form S-8, and Nos. 333-286632 and

333-282328 on Form S-3 of Third Coast Bancshares, Inc. of our report dated April 14, 2026, relating to the consolidated financial statements of Keystone Bancshares,

Inc. and Subsidiary as of and for the years ended December 31, 2025 and 2024.

/s/ Whitley Penn LLP

Austin, Texas

April 17, 2026

EX-99.1

EX-99.1

Filename: d306467dex991.htm · Sequence: 3

EX-99.1

Exhibit 99.1

KEYSTONE BANCSHARES, INC.

AND SUBSIDIARY

Consolidated Financial Statements

For the Years Ended December 31, 2025 and 2024

Austin Office

3600 N. Capital of Texas

Hwy.

Bldg B. Suite 250

Austin, Texas 78746

737.931.8200 Main

whitleypenn.com

REPORT OF INDEPENDENT AUDITORS

To the Board of Directors and Stockholders of

Keystone

Bancshares, Inc. and Subsidiary

Opinion

We have

audited the consolidated financial statements of Keystone Bancshares, Inc. and Subsidiary (collectively referred to as the “Company”), which comprise the consolidated balance sheets as of December 31, 2025 and 2024, and the

related consolidated statements of income and comprehensive income, changes in stockholders’ equity, and cash flows for the years then ended, and the related notes to the consolidated financial statements.

In our opinion, the accompanying consolidated financial statements present fairly, in all material respects, the financial position of the Company as of

December 31, 2025 and 2024, and the results of its operations and its cash flows for the years then ended in accordance with accounting principles generally accepted in the United States of America (“GAAP”).

Basis for Opinion

We conducted our audits in accordance

with auditing standards generally accepted in the United States of America (“GAAS”). Our responsibilities under those standards are further described in the Auditor’s Responsibilities for the Audit of the Financial Statements

section of our report. We are required to be independent of the Company, and to meet our other ethical responsibilities, in accordance with the relevant ethical requirements relating to our audits. We believe that the audit evidence we have obtained

is sufficient and appropriate to provide a basis for our audit opinion.

Responsibilities of Management for the Financial Statements

Management is responsible for the preparation and fair presentation of the consolidated financial statements in accordance with GAAP, and for the design,

implementation, and maintenance of internal control relevant to the preparation and fair presentation of consolidated financial statements that are free from material misstatement, whether due to fraud or error.

In preparing the consolidated financial statements, management is required to evaluate whether there are conditions or events, considered in the aggregate,

that raise substantial doubt about the Company’s ability to continue as a going concern for one year after the date that the consolidated financial statements are issued.

Auditor’s Responsibilities for the Audit of the Financial Statements

Our objectives are to obtain reasonable assurance about whether the consolidated financial statements as a whole are free from material misstatement, whether

due to fraud or error, and to issue an auditor’s report that includes our opinion. Reasonable assurance is a high level of assurance but is not absolute assurance and therefore is not a guarantee that an audit conducted in accordance with GAAS

will always detect a material misstatement when it exists. The risk of not detecting a material misstatement resulting from fraud is higher than for one resulting from error, as fraud may involve collusion, forgery, intentional omissions,

misrepresentations, or the override of internal control. Misstatements are considered material if there is a substantial likelihood that, individually or in the aggregate, they would influence the judgment made by a reasonable user based on the

consolidated financial statements.

In performing an audit in accordance with GAAS, we:

Exercise professional judgment and maintain professional skepticism throughout the audit.

Identify and assess the risks of material misstatement of the consolidated financial statements, whether due to

fraud or error, and design and perform audit procedures responsive to those risks. Such procedures include examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements.

Obtain an understanding of internal control relevant to the audit in order to design audit procedures that are

appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control. Accordingly, no such opinion is expressed.

Evaluate the appropriateness of accounting policies used and the reasonableness of significant accounting

estimates made by management, as well as evaluate the overall presentation of the consolidated financial statements.

Conclude whether, in our judgment, there are conditions or events, considered in the aggregate, that raise

substantial doubt about the Company’s ability to continue as a going concern for a reasonable period of time.

We are required to

communicate with those charged with governance regarding, among other matters, the planned scope and timing of the audit, significant audit findings, and certain internal control–related matters that we identified during the audit.

Austin, Texas

April 14, 2026

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

CONSOLIDATED BALANCE SHEETS

December 31, 2025 and 2024

ASSETS

2025

2024

Cash and cash equivalents

Cash and due from banks

$

39,217,655

$

25,181,423

Interest-bearing deposits in other banks

62,917,374

38,655,430

Federal funds sold

1,180,000

441,000

Total cash and cash equivalents

103,315,029

64,277,853

Investment securities

available-for-sale

73,563,444

77,814,751

Loans, net of allowance for credit losses of $7,842,643 and $7,134,571 at December 31, 2025

and 2024, respectively

807,043,243

763,228,059

Premises and equipment, net

12,996,508

14,403,677

Marketable equity securities

2,219,999

2,086,556

Nonmarketable equity securities

5,194,910

4,694,574

Core deposit intangibles, net

795,982

1,042,078

Goodwill

5,780,480

5,780,480

Deferred tax asset, net

2,166,866

2,333,056

Accrued interest receivable and other assets

5,485,273

4,326,707

Total assets

$

1,018,561,734

$

939,987,791

LIABILITIES AND STOCKHOLDERS’ EQUITY

Deposits

Noninterest bearing

$

151,591,813

$

147,260,664

Interest bearing

712,838,953

646,744,373

Total deposits

864,430,766

794,005,037

Federal Home Loan Bank advances

40,000,000

40,000,000

Operating lease liability

7,779,598

8,367,429

Accrued interest payable and other liabilities

2,043,425

2,044,447

Total liabilities

914,253,789

844,416,913

Commitments and contingencies

Stockholders’ equity

Common stock; par value $1.00 per share; 30,000,000 shares authorized; 6,699,874 and 6,701,637

issued and 6,695,707 and 6,697,470 outstanding at December 31, 2025 and 2024, respectively

6,699,874

6,701,637

Treasury stock; 4,167 shares at December 31, 2025 and 2024

(50,004

)

(50,004

)

Preferred stock; no par value; 10,000,000 authorized, 0 shares issued and outstanding at

December 31, 2025 and 2024

Additional paid-in capital

74,269,922

73,547,159

Retained earnings

26,144,862

19,899,706

Accumulated other comprehensive loss

(2,756,709

)

(4,527,620

)

Total stockholders’ equity

104,307,945

95,570,878

Total liabilities and stockholders’ equity

$

1,018,561,734

$

939,987,791

See accompanying notes to consolidated financial statements.

3

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME

For the Years Ended December 31, 2025 and 2024

2025

2024

Interest income

Loans, including fees

$

56,548,571

$

50,647,182

Investment securities

available-for-sale

2,797,633

3,219,947

Interest-bearing deposits in other banks

4,308,156

3,511,229

Federal funds sold

58,749

45,876

Total interest income

63,713,109

57,424,234

Interest expense

Deposit accounts

26,389,001

26,852,250

Federal Reserve Bank advances and other borrowings

2,002,298

1,998,565

Total interest expense

28,391,299

28,850,815

Net interest income

35,321,810

28,573,419

Provision for credit losses

5,571,709

877,193

Net interest income after provision for credit losses

29,750,101

27,696,226

Noninterest income

Service charges and fees on deposits

479,515

405,412

Debit card fee income

373,761

360,041

Gains on sales of loans and other assets

321,194

589,860

Other

485,044

372,345

Total noninterest income

1,659,514

1,727,658

Noninterest expense

Salaries and employee benefits

12,031,102

10,757,592

Occupancy

2,590,905

2,589,905

Data processing and telecommunications

1,469,429

1,377,549

Legal and professional

1,315,345

857,146

Software expense

1,048,751

990,456

Stock-based compensation

717,400

388,200

Amortization of core deposit intangible assets

246,096

246,096

Regulatory assessments

794,500

880,000

Advertising

279,870

248,954

Other

2,631,281

2,143,391

Total noninterest expense

23,124,679

20,479,289

Income before income taxes

8,284,936

8,944,595

Income tax expense

2,039,780

2,049,591

Net income

6,245,156

6,895,004

Other comprehensive income, net of tax:

Unrealized income on investment securities available-for-sale arising during the period

2,241,660

160,018

Income tax expense related to items of other comprehensive income

(470,749

)

(33,604

)

Other comprehensive income, net of tax

1,770,911

126,414

Total comprehensive income

$

8,016,067

$

7,021,418

See accompanying notes to consolidated financial statements.

4

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY

For the Years Ended December 31, 2025 and 2024

Common

Stock

Treasury

Stock

Additional

Paid-In

Capital

Retained

Earnings

Accumulated

Other

Comprehensive

Loss

Total

Balance, January 1, 2024

$

6,642,537

$

(50,004

)

$

73,209,659

$

13,004,702

$

(4,654,034

)

$

88,152,860

Net income

6,895,004

6,895,004

Exercise of stock options

600

7,800

8,400

Issuance of restricted stock

58,500

(58,500

)

Stock-based compensation expense

388,200

388,200

Other comprehensive income, net of tax

126,414

126,414

Balance, December 31, 2024

$

6,701,637

$

(50,004

)

$

73,547,159

$

19,899,706

$

(4,527,620

)

$

95,570,878

Common

Stock

Treasury

Stock

Additional

Paid-In

Capital

Retained

Earnings

Accumulated

Other

Comprehensive

Loss

Total

Balance, January 1, 2025

$

6,701,637

$

(50,004

)

$

73,547,159

$

19,899,706

$

(4,527,620

)

$

95,570,878

Net income

6,245,156

6,245,156

Exercise of stock options

300

3,300

3,600

Forfeiture of restricted stock

(2,063

)

2,063

Stock-based compensation expense

717,400

717,400

Other comprehensive income, net of tax

1,770,911

1,770,911

Balance, December 31, 2025

$

6,699,874

$

(50,004

)

$

74,269,922

$

26,144,862

$

(2,756,709

)

$

104,307,945

See accompanying notes to consolidated financial statements.

5

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

CONSOLIDATED STATEMENTS OF CASH FLOWS

For the Years Ended December 31, 2025 and 2024

2025

2024

Cash flows from operating activities

Net income

$

6,245,156

$

6,895,004

Adjustments to reconcile net income to net cash provided by operating activities:

Provision for credit losses

5,571,709

877,193

Depreciation expense

886,975

858,174

Amortization of

right-of-use asset

602,331

643,669

Change in operating lease liabilities

(587,831

)

33,591

Amortization of core deposit intangible assets

246,096

246,096

Accretion of investment securities discounts, net

(64,199

)

(86,761

)

Stock-based compensation expense

717,400

388,200

Deferred tax benefit

(304,559

)

(408,451

)

Loans held for sale originations

(1,281,000

)

(3,504,325

)

Proceeds from sale of loans held for sale

1,283,687

3,567,046

Gain on sales of loans held for sale

(38,403

)

(62,721

)

Proceeds from sales of SBA loans

3,999,670

6,578,043

Gain on sales of SBA loans

(277,791

)

(527,138

)

Unrealized holding (gain) loss on marketable equity securities

(67,653

)

19,734

Changes in operating assets and liabilities:

Accrued interest receivable and other assets

(1,158,566

)

494,298

Accrued interest payable and other liabilities

54,932

(81,162

)

Net cash provided by operating activities

15,827,954

15,930,490

Cash flows from investing activities

Purchases of available for sale securities

(1,099,909,334

)

(820,049,677

)

Maturities, calls and paydowns of available for sale securities

1,106,466,500

801,923,466

Purchase of marketable equity securities

(65,790

)

(60,050

)

Purchase of nonmarketable equity securities

(311,861

)

(1,120,200

)

Net loan originations

(53,317,484

)

(89,342,185

)

Net additions to bank premises and equipment

(82,138

)

(1,995,941

)

Net cash used in investing activities

(47,220,107

)

(110,644,587

)

Cash flows from financing activities

Net change in deposits

70,425,729

51,536,892

Proceeds from issuance of common stock

3,600

8,400

Proceeds from Federal Home Loan Bank advances and other debt

30,000,000

Net cash provided by financing activities

70,429,329

81,545,292

Net increase (decrease) in cash and cash equivalents

39,037,176

(13,168,805

)

Cash and cash equivalents at beginning of year

64,277,853

77,446,658

Cash and cash equivalents at end of year

$

103,315,029

$

64,277,853

Supplemental Disclosures of Cash Flow Information

Cash paid for interest

$

28,317,701

$

28,889,334

Cash paid for taxes

$

2,185,494

$

1,995,000

Supplemental Disclosure of Non-Cash

Activities

Premises and equipment (lease

right-of-use assets) obtained in exchange of lease liabilities

$

$

329,009

Nonmarketable equity securities acquired through foreclosure

$

$

1,327,944

Repossessed assets acquired through foreclosure

$

188,475

$

See accompanying notes to consolidated financial statements.

6

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

December 31, 2025 and 2024

1.

Nature of Operations and Summary of Significant Accounting Policies

Nature of Operations

Keystone Bancshares, Inc.

(“Bancshares”) was formed effective June 26, 2017. In 2018, Bancshares formed a wholly-owned subsidiary, Keystone Interim Bank, N.A., an interim national banking association. Effective October 15, 2018, Bancshares acquired

Ballinger National Bank (“BNB”), a national bank which began operations in April 1997, and merged BNB with Keystone Interim Bank, N.A with the resulting consolidated bank being named Keystone Bank, N.A (the “Bank”). On

March 11, 2021, the Bank changed its charter from a national charter to a state savings bank and changed the name of the Bank to “Keystone Bank, SSB.”

Keystone Bancshares, Inc. through its wholly-owned subsidiary, Keystone Bank, SSB (collectively referred to as the “Company”), provides general

consumer and commercial banking services through three branch offices and one loan production office (LPO) located in Ballinger, Austin, and Bastrop, Texas. The Company is subject to competition from other financial institutions, is subject to the

regulations of certain government agencies and undergoes periodic examinations by those regulatory authorities.

Basis of Presentation

The accompanying consolidated financial statements include the accounts of Keystone Bancshares, Inc. and its wholly owned subsidiary, Keystone Bank, SSB. All

significant intercompany balances and transactions have been eliminated through consolidation.

Use of Estimates

The accounting and reporting policies of the Company and the methods of applying those policies that materially affect the accompanying consolidated financial

statements conform with accounting principles generally accepted in the United States (“GAAP”) and prevailing banking industry practices. In preparing the consolidated financial statements, management is required to make estimates and

assumptions that affect the reported amounts of assets and liabilities as of the balance sheet dates and revenues and expenses for the periods shown. Actual results could differ from the estimates and assumptions used in the consolidated financial

statements including the allowance for credit losses, the fair values of financial instruments, and the status of contingencies.

Cash and Cash

Equivalents

For purposes of reporting cash flows, cash, and cash equivalents includes cash on hand, deposits at other banks that have initial

maturities of less than 90 days when acquired by the Company, and federal funds sold.

The Company maintains deposits with other financial institutions in

amounts that exceed federal deposit insurance coverage. Furthermore, federal funds sold are essentially uncollateralized loans to other financial institutions. Management regularly evaluates the credit risk associated with the counterparties to

these transactions and believes that the Company is not exposed to any significant credit risks on cash and cash equivalents.

Investment Securities Available-for-Sale

Securities to be held for indefinite periods of time but

not intended to be held-to-maturity or on a long-term basis are classified as

available-for-sale and are recorded at estimated fair value, adjusted for amortization of premiums and accretion of discounts, with all unrealized gains and unrealized

losses judged to be temporary, net of deferred income taxes, excluded from earnings and reported as a separate component of stockholders’ equity.

7

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

1.

Nature of Operations and Summary of Significant Accounting Policies – continued

The fair value of investment securities are determined based on methodologies in accordance with GAAP. Fair

values are volatile and may be influenced by a number of factors, including market interest rates, prepayment speeds, discount rates, and yield curves. Fair values for investment securities are based on quoted market prices, where available. If

quoted market prices are not available, fair values are based on the quoted prices of similar instruments or an estimate of fair value by using a range of fair value estimates in the market place as a result of the illiquid market specific to the

type of security.

Allowance for Credit Losses – Investment Securities

Available-for-Sale

For available-for-sale securities in an unrealized loss position, the Company first assesses whether it intends to sell or whether it is more likely than not that it will be required to sell the security before

recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value through income. For debt securities available-for-sale that do not meet the aforementioned criteria, the Company evaluates whether the decline in value has resulted from credit losses or other factors. In making

this assessment, management considers the extent to which fair value is less than amortized cost, among other factors, including third-party guarantees, bond ratings, and prior credit losses, as applicable. If this assessment indicates that a credit

loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, a

credit loss exists and an allowance for credit losses is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost basis. Any impairment that has not been recorded through an allowance for credit losses

is recognized in other comprehensive income.

Changes in the allowance for credit losses are recorded as credit loss expense (or reversal). Losses are

charged against the allowance when management believes the uncollectability of an available-for-sale security is confirmed or when either of the criteria regarding

intent or requirement to sell is met.

Loans and Allowance for Credit Losses

Loans are stated at the amount of unpaid principal, reduced by unearned income, including discounts, deferred loan fees and costs, and an allowance for credit

losses. Interest on loans is calculated by using the simple interest method on daily balances of the principal amounts outstanding. Accrued interest receivable totaled $3,463,757 and $3,023,488 as of December 31, 2025, and 2024, respectively.

It is reported under accrued interest receivable and other assets on the consolidated balance sheets and is excluded from the estimate of credit losses.

The allowance for credit losses is a valuation account that is deducted from the loan’s amortized cost basis to present the net amount expected to be

collected on the loans. Loans are charged off against the allowance when management believes the collectability of a loan balance is confirmed. Expected recoveries do not exceed the aggregate of amounts previously

charged-off and expected to be charged-off.

Management estimates the

allowance balance using relevant available information, from internal and external sources, past events, current conditions, and reasonable and supportable forecasts. Historical credit loss experience provides a basis for the estimation of expected

credit losses. Adjustments to historical loss information are made for differences in current loan-specific risk characteristics such as differences in underwriting standards, portfolio mix, delinquency level, or term as well as for changes in

environmental conditions, such as changes in historic and/or forecasted data of unemployment, inflation rate, GDP growth rate, market rates, and other relevant factors.

The allowance for credit losses is measured on a collective (pool) basis for portfolios of loans when similar risk characteristics exist. Common risk

characteristics include risk ratings, financial asset type, collateral type, size, term, and historical or expected loss rate patterns. Our loan pools are segmented by call report codes. We periodically reassess each pool to ensure the loans within

the pool continue to share similar characteristics and risk profiles and to determine whether further segmentation is necessary. Loans that do not share risk characteristics

8

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

1.

Nature of Operations and Summary of Significant Accounting Policies – continued

are evaluated for expected credit losses on an individual basis and excluded from the collective evaluation. When the borrower is experiencing financial difficulty and repayment is expected to be

provided through operation or sale of the collateral, the expected credit losses are based on the fair value of collateral at the reporting date, adjusting for selling costs as appropriate. Such loans are referred to as “collateral-dependent

loans”.

Accrual of interest is discontinued on a loan and all payments are applied to principal when management believes, after considering

economic and business conditions and collection efforts, the borrower’s financial condition is such that collection of contractual payments is doubtful. Generally, all loans past due greater than 90 days, based on contractual terms, are placed

on non-accrual. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. Consumer loans are generally charged-off when a loan becomes past due 90 days. For other loans in the portfolio, facts and circumstances are evaluated in making charge-off decisions.

Occasionally, the Company modifies loans to borrowers in financial distress by providing a lower interest rate, a reduction of principal, or a longer term to

maturity. When principal forgiveness is provided, the amount of forgiveness is charged-off against the allowance for credit losses. The amount of the principal forgiveness is deemed to be uncollectible;

therefore, that portion of the loan is written off, resulting in a reduction of the amortized cost basis and a corresponding adjustment to the allowance for credit losses. Because the effect of most modifications made to borrowers experiencing

financial difficulty is already included in the allowance for credit losses because of the measurement methodologies used to estimate the allowance, a change to the allowance for credit losses is generally not recorded upon modification. In some

cases, the Company will modify a certain loan by providing multiple types of concessions. Typically, one type of concession, such as a term extension, is granted initially. If the borrower continues to experience financial difficulty, another

concession, such as principal forgiveness, may be granted. As disclosed in Note 3, during the years ended December 31, 2025, and 2024, the Company granted modifications to certain borrowers experiencing financial difficulty.

The Company has certain lending policies and procedures in place that are designed to maximize loan income with an acceptable level of risk. Management

reviews and approves these policies and procedures on a regular basis and makes changes as appropriate. Management receives frequent reports related to loan originations, quality, concentrations, delinquencies,

non-performing and potential problem loans. Diversification in the loan portfolio is a means of managing risk associated with fluctuations in economic conditions, both by type of loan and geography.

Commercial loans are underwritten after evaluating and understanding the borrower’s ability to operate profitably and effectively. Underwriting

standards are designed to determine whether the borrower possesses sound business ethics and practices and to evaluate current and projected cash flows to determine the ability of the borrower to repay their obligations as agreed. Commercial loans

are primarily made based on the identified cash flows of the borrower and, secondarily, on the underlying collateral provided by the borrower. Most commercial loans are secured by the assets being financed or other business assets, such as accounts

receivable or inventory, and include personal guarantees.

Agricultural loans are subject to underwriting standards and processes similar to commercial

loans. Agricultural loans are primarily made based on the identified cash flows of the borrower and, secondarily, on the underlying collateral provided by the borrower. Most agricultural loans are secured by the agriculture related assets being

financed, such as farmland, cattle, or equipment, and include personal guarantees.

Real estate loans are also subject to underwriting standards and

processes similar to commercial and agricultural loans. These loans are underwritten primarily based on projected cash flows and, secondarily, as loans secured by real estate. The repayment of real estate loans is generally largely dependent on the

successful operation of the property securing the loans or the business conducted on the property securing the loan. Real estate loans may be more adversely affected by conditions in the real estate markets or in the general economy.

9

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

1.

Nature of Operations and Summary of Significant Accounting Policies – continued

The Company utilizes methodical credit standards and analysis to supplement its policies and procedures in

underwriting consumer loans. The Company’s loan policy addresses types of consumer loans that may be originated and the collateral, if secured, must be perfected. The relatively smaller individual dollar amounts of consumer loans that are

spread over numerous individual borrowers also minimizes the Company’s risk.

Government Guaranteed Loans

The Company originates loans that are partially guaranteed by the Small Business Administration, or SBA, and the Company may sell the guaranteed portion of

these loans as market conditions and pricing allow for a gain to be recorded on the sale. Loan sales are recorded when control over the transferred asset has been relinquished. Control over the transferred portion is deemed to be surrendered when

the assets have been removed from the Company, the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets and the Company does not maintain effective

control over the transferred assets through an agreement to repurchase them before their maturity.

In calculating the gain on sale of SBA loans, the

Company’s investment in the loan is allocated among the unguaranteed portion of the loan, the servicing amount retained, and the guaranteed portion of the loan sold, based on the relative fair market value of each portion. The gain on the sold

portion of the loan is recognized based on the difference between the sale proceeds and the allocated investment.

Loans Held for Sale

Loans held for sale include mortgage loans originated with the intent to sell on the secondary market. Loans held for sale are carried at the lower of cost or

estimated fair value on an individual basis. These loans are held for an interim period, usually less than 30 days. There were no material loans held for sale outstanding as of December 31, 2025 and 2024, respectively.

Fees and Costs Associated with Originating Loans

Loan

origination fees and costs are deferred and included as a component of loans in the consolidated balance sheets and recognized as adjustments to interest income over the lives of the related loans as an adjustment of the yield using a method

approximating the interest method.

Foreclosed Assets

Foreclosed assets are initially recorded at fair value less estimated costs to sell at the time of acquisition, establishing a new cost basis. Legal ownership

is typically obtained through negotiated transactions, legal settlements, or similar events. These assets are subsequently measured at the lower of cost or fair value less estimated costs to sell. If fair value declines subsequent to foreclosure, a

valuation allowance is recorded through expense. Operating costs after acquisition are expensed. At December 31, 2025 the Company owns certain assets acquired through foreclosure which are included in nonmarketable equity securities on the

consolidated balance sheets. Refer to Note 5 – Equity Securities for additional information.

Premises and Equipment

Company premises and equipment are stated at cost, less accumulated depreciation. Depreciation is provided principally by the straight-line method over the

estimated useful lives of assets, ranging from 2 to 30 years.

10

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

1.

Nature of Operations and Summary of Significant Accounting Policies – continued

Leases

Leases are classified as operating or finance leases at the lease commencement date. The Company leases certain locations. The Company records leases on the

balance sheet in the form of a lease liability for the present value of future minimum payments under the lease terms and a right-of-use asset equal to the lease

liability adjusted for items such as deferred or prepaid rent, lease incentives, and any impairment of the right-of-use asset. The discount rate used in determining the

lease liability is based upon incremental borrowing rates the Company could obtain for similar loans as of the date of commencement or renewal. The Company does not record short term leases with an initial lease term of one year or less on the

consolidated balance sheets.

Equity securities

Marketable equity securities are carried at fair value, with changes in fair value reported in net income. Nonmarketable equity securities without readily

determinable fair values are carried at cost, minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or similar investment.

Goodwill and Intangible Assets

Goodwill represents the

excess of the cost of entities acquired at inception over the fair value of the net assets acquired. Goodwill has been assigned to the Bank and is tested for impairment if an annual qualitative assessment (of whether it is likely that the fair value

of these reporting units are less than their carrying value) indicates the need for an impairment test, but may be tested for impairment if any event occurs or circumstances change that would

more-likely-than-not reduce the fair value of the Bank below its carrying value. Intangible assets consist of core deposit intangibles and are initially recognized based on a valuation performed as of the

consummation date and are amortized over 10 years, the average estimated life of the acquired customer deposits, using the straight-line method. All intangible assets are tested annually for potential impairment or when triggering events occur. No

impairment charges were recorded during the years ended December 31, 2025 and 2024, in goodwill or other intangible assets.

Impairment of

Long-lived Assets to be Held and Used

The Company reviews the carrying value of long-lived assets for impairment whenever triggering events or changes

in circumstances indicate that the carrying amounts of any asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of any asset of future net cash flows expected to be generated

by the asset. If such assets are considered to be impaired, the impairment to be recognized is measured by the excess of the carrying amount over the fair value of the assets. No triggering events were identified by management for the years ended

December 31, 2025 and 2024, respectively.

Income Taxes

The Company is taxed as a C-Corporation and files a consolidated federal income tax return with its subsidiary.

Income tax expense is the total of the current year income tax due or refundable and the change in deferred tax assets and liabilities. Deferred tax assets

and liabilities are the expected future tax amounts for the temporary differences between carrying amounts and tax bases of assets and liabilities, computed using enacted tax rates. A valuation allowance, if needed, reduces deferred tax assets to

the amount expected to be realized.

11

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

1.

Nature of Operations and Summary of Significant Accounting Policies – continued

Revenue Recognition

ASC 606, Revenue from Contracts with Customers (“ASC 606”), establishes principles for reporting information about the nature, amount,

timing and uncertainty of revenue and cash flows arising from the entity’s contracts to provide goods or services to customers. The core principle requires an entity to recognize revenue to depict the transfer of goods or services to customers

in an amount that reflects the consideration that it expects to be entitled to receive in exchange for those goods or services recognized as performance obligations are satisfied. The majority of the Company’s revenue-generating transactions

are not subject to ASC 606, including revenue generated from financial instruments, such as loans, letters of credit, and investment securities, as these activities are subject to other GAAP discussed elsewhere within the disclosures.

Descriptions of the Company’s revenue-generating activities that are within the scope of ASC 606, which are presented in the accompanying consolidated

statements of income and comprehensive income as components of non-interest income are as follows:

Service charges on deposit accounts – these represent general service fees for monthly account maintenance

and activity- or transaction-based fees and consist of transaction-based revenue, time-based revenue (service period), item-based revenue or some other individual attribute-based revenue. Revenue is recognized when the performance obligation is

completed, which is generally monthly for account maintenance services or when a transaction has been completed (such as a wire transfer). Payments for such performance obligations are generally received at the time the performance obligations are

satisfied.

Other non-interest income primarily includes items such as letter of credit fees,

dividends on FHLB and FRB stock, realized gains on sales of available-for-sale securities, and other general operating income, none of which are subject to the

requirements of ASC 606.

Financial Instruments

In

the ordinary course of business the Company has entered into certain off-balance sheet financial instruments consisting of commitments to extend credit, commitments under commercial letters of credit and

standby letters of credit. Such financial instruments are recorded in the consolidated financial statements when they are funded or related fees are incurred or received. Company’s exposure to credit loss in the event of nonperformance by the

other party to the financial instrument for off-balance sheet loan commitments is represented by the contractual amount of those instruments. Such financial instruments are recorded when they are funded.

The Company records an allowance for credit losses on off-balance sheet credit exposures, unless the commitments to

extend credit are unconditionally cancelable, through a charge to provision for unfunded commitments in the Company’s statements of income and comprehensive income. The allowance for credit losses on

off-balance sheet credit exposures is estimated by loan segment at each balance sheet date under the current expected credit loss model using the same methodologies as portfolio loans, taking into

consideration the likelihood that funding will occur as well as any third-party guarantees. The allowance for unfunded commitments is included in accrued interest payable and other liabilities on the Company’s consolidated balance sheets.

Comprehensive Income

Comprehensive income includes all

changes in stockholders’ equity during a period, except those resulting from transactions with stockholders. In addition to net income, comprehensive income includes the net effect of changes in the fair value of securities available-for-sale. Comprehensive income is reported in the accompanying consolidated statements of income and comprehensive income.

12

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

1.

Nature of Operations and Summary of Significant Accounting Policies – continued

Advertising

The Company expenses advertising costs as incurred. Advertising expense was $279,870 and $248,954 for the years ended December 31, 2025 and 2024,

respectively.

2.

Investment Securities

Available-for-Sale

The following table summarizes

the amortized cost, estimated fair value, and allowance for credit losses of securities available-for-sale as of December 31, 2025 and 2024, along with the

corresponding gross unrealized gains and losses recognized in accumulated other comprehensive income (loss).

December 31, 2025

Amortized

Cost

Gross Unrealized

Gains

Gross Unrealized

Losses

Allowance for

Credit Losses

Estimated Fair

Value

Mortgage-backed securities

$

28,437,017

$

102,284

$

(2,066,806

)

$

$

26,472,495

Collateralized mortgage obligations

38,660,987

48,252

(1,573,234

)

37,136,005

Asset-backed investment

9,954,944

9,954,944

Total

$

77,052,948

$

150,536

$

(3,640,040

)

$

$

73,563,444

December 31, 2024

Amortized

Cost

Gross Unrealized

Gains

Gross Unrealized

Losses

Allowance for

Credit Losses

Estimated Fair

Value

Mortgage-backed securities

$

34,838,469

$

3,853

$

(3,539,312

)

$

$

31,303,010

Collateralized mortgage obligations

48,707,445

84,314

(2,280,019

)

46,511,741

Total

$

83,545,914

$

88,167

$

(5,819,331

)

$

$

77,814,751

The amortized cost and estimated fair value of debt securities as of December 31, 2025, are not presented by contractual

maturity, as the portfolio consists solely of mortgage-backed securities and collateralized mortgage obligations. The actual maturities of these securities may differ from contractual maturities due to the potential for borrowers to call or prepay

obligations, with or without penalties.

13

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

2.

Investment Securities

Available-for-Sale – continued

The following table summarizes debt securities available-for-sale that are in an unrealized loss position, for which an allowance for credit losses has not been recorded, as of December 31, 2025 and 2024, aggregated by major security type and length

of time in a continuous unrealized loss position:

December 31, 2025

Less Than 12 Months

Greater Than 12 Months

Total

Fair Value

Unrealized Losses

Fair Value

Unrealized Losses

Fair Value

Unrealized Losses

Mortgage-backed securities

$

1,547,087

$

(8,628

)

$

19,674,288

$

(2,058,178

)

$

21,221,375

$

(2,066,806

)

Collateralized mortgage obligations

16,647,882

(206,489

)

15,071,524

(1,366,745

)

31,719,406

(1,573,234

)

Total

$

18,194,969

$

(215,117

)

$

34,745,812

$

(3,424,923

)

$

52,940,781

$

(3,640,040

)

December 31, 2024

Less Than 12 Months

Greater Than 12 Months

Total

Fair Value

Unrealized Losses

Fair Value

Unrealized Losses

Fair Value

Unrealized Losses

Mortgage-backed securities

$

7,126,403

$

(141,560

)

$

23,223,134

$

(3,397,752

)

$

30,349,537

$

(3,539,312

)

Collateralized mortgage obligations

18,175,943

(76,289

)

12,156,657

(2,203,730

)

30,332,600

(2,280,019

)

Total

$

25,302,346

$

(217,849

)

$

35,379,791

$

(5,601,482

)

$

60,682,137

$

(5,819,331

)

As of December 31, 2025, the Company’s security portfolio consisted of 201 securities, 152 of which were in an

unrealized loss position. As of December 31, 2024, the portfolio consisted of 201 securities, 182 of which were in an unrealized loss position. The portfolio includes mortgage-backed securities and collateralized mortgage obligations that are

either government-issued or government-sponsored, with implicit or explicit guarantees from the U.S. government. With consideration given to this, management believes that the decline in fair value is due to changes in interest rates, rather than

concerns about credit quality. Based on this and the fact that the Company does not intend to sell these securities, nor is it likely to be required to sell them before their anticipated recovery, no allowance for credit losses or write-downs were

deemed necessary as of December 31, 2025, and 2024, respectively.

Investment securities with carrying values of $21,011,599 and $20,752,294 at

December 31, 2025 and 2024, were pledged to secure public deposits and for other purposes as required or permitted by law.

There were no sales of

securities during the years ended December 31, 2025 and 2024, respectively.

14

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

3.

Loans

Loans in the accompanying consolidated balance sheets consisted of the following:

December 31,

2025

December 31,

2024

Construction and land development

$

106,012,489

$

100,577,669

Commercial real estate

349,306,675

326,346,982

Residential real estate

163,328,825

157,215,882

Multifamily real estate

25,797,760

25,159,210

Commercial

154,784,942

142,370,253

Agricultural

16,385,930

19,286,969

Consumer and other

996,482

1,192,674

Subtotal

816,613,103

772,149,639

Deferred loan fees, net

(1,727,217

)

(1,787,009

)

Allowance for credit losses

(7,842,643

)

(7,134,571

)

Total loans

$

807,043,243

$

763,228,059

The Company participates in the SBA loan program. When advantageous, the Company sells the guaranteed portions of these loans

while retaining servicing rights. Net gains recognized on sales of SBA loans were $277,791 and $527,138 for the years ended December 31, 2025, and 2024, respectively. These gains are included in gains on sales of loans and other assets in the

consolidated statements of income and comprehensive income. The related servicing asset was not significant to the Company’s consolidated financial statements as of December 31, 2025 and 2024.

Concentrations of Credit

The Company makes agricultural,

real estate, commercial, and consumer loans to customers primarily in the Ballinger and Austin, Texas areas. Although the Company’s portfolio is diversified, a substantial portion of the Company’s customers’ abilities to honor

their contracts is dependent upon the business economy in these cities and surrounding areas.

At December 31, 2025 and 2024, the Company had total

commercial real estate loans representing 443.8% and 451.4%, respectively of total risk-based capital. Included in this percentage, the Company had non-owner occupied commercial real estate loans representing

316.2% and 331.3%, respectively, and owner occupied commercial real estate loans representing 127.5% and 120.0%, respectively. Additionally, as of December 31, 2025 and 2024, the Company had loans for construction, land development, and other

land loans representing 97.5% and 100.1%, respectively, of total risk-based capital.

Sound risk management practices and appropriate levels of capital

are essential elements of a sound commercial real estate lending program (“CRE”). Concentrations of CRE exposures add a dimension of risk that compounds the risk inherent in individual loans. Interagency guidance on CRE concentrations

describe sound risk management practices which include board and management oversight, portfolio management, management information systems, market analysis, portfolio stress testing and sensitivity analysis, credit underwriting standards, and

credit risk review functions. Management believes it has implemented these practices in order to monitor its CRE. An institution which has reported loans for construction, land development, and other land loans representing 100% or more of total

risk based capital, or total non-owner occupied commercial real estate loans representing 300% or more of the institution’s total risk-based capital and the outstanding balance of commercial real estate

loan portfolio has increased by 50% or more during the prior 36 months, may be identified for further supervisory analysis by regulators to assess the nature and risk posed by the concentration.

15

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

3.

Loans – continued

Non-Accrual and Past Due Loans

Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due. Loans are placed on

non-accrual status when, in management’s opinion, the borrower may be unable to meet payment obligations as they become due, as well as when required by regulatory provisions. Loans may be placed on non-accrual status regardless of whether or not such loans are considered past due. When interest accrual is discontinued, all unpaid accrued interest is reversed. Interest income is subsequently recognized only to

the extent cash payments are received in excess of principal due. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured.

Non-accrual loans, segregated by class of loans, as of December 31, 2025 and 2024, are classified as follows:

December 31, 2025

Nonaccrual With

No Allowance for

Credit Loss

Nonaccrual

Construction and land development

$

$

Commercial real estate

Residential real estate

Multifamily real estate

Commercial

879,271

Agricultural

57,663

57,663

Consumer and other

Total

$

57,663

$

936,934

December 31, 2024

Nonaccrual With

No Allowance for

Credit Loss

Nonaccrual

Construction and land development

$

$

Commercial real estate

Residential real estate

Multifamily real estate

Commercial

58,312

Agricultural

Consumer and other

Total

$

$

58,312

16

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

3.

Loans – continued

The amount of additional interest income that would have been recognized in the years ended December 31,

2025 and 2024, that would have been earned under the original terms of the nonaccrual loans is immaterial for both periods, respectively.

An age analysis

of past due loans, aggregated by class of loans, are as follows:

December 31, 2025

30 to 59

Days

60 to 89

Days

90 Days

or Greater

Total Past

Due

Total 90 Days Past

Due and Still

Accruing

Construction and land development

$

$

1,250,000

$

$

1,250,000

$

Commercial real estate

634,373

578,630

1,213,003

Residential real estate

1,080,969

1,080,969

Multifamily real estate

Commercial

41,758

188,969

606,866

837,593

Agricultural

57,663

57,663

Consumer and other

Total

$

1,814,763

$

2,017,599

$

606,866

$

4,439,228

$

December 31, 2024

30 to 59

Days

60 to 89

Days

90 Days or

Greater

Total Past

Due

Total 90 Days Past

Due and Still

Accruing

Construction and land development

$

$

$

$

$

Commercial real estate

Residential real estate

1,091,124

936,336

58,312

2,085,772

Multifamily real estate

Commercial

Agricultural

Consumer and other

Total

$

1,091,124

$

936,336

$

58,312

$

2,085,772

$

Credit Quality Indicators

From a credit risk standpoint, the Company classifies its loans in one of five categories: (i) pass, (ii) watch list, (iii) special mention,

(iv) substandard, or (v) doubtful. Loans classified as loss are charged-off. The classifications of loans reflect a judgment about the risks of default and loss associated with the loan. The Company

reviews the ratings on credits on a monthly basis. Ratings are adjusted to reflect the degree of risk and loss that is felt to be inherent in each credit as of each monthly reporting period.

The methodology is structured so that specific allocations are increased in accordance with deterioration in credit quality (and a corresponding increase in

risk and loss) or decreased in accordance with improvement in credit quality (and a corresponding decrease in risk and loss). Credits rated pass show no clear signs of financial weakness or deterioration in credit worthiness. Credits rated watch

list are still current and performing, but have been identified by management as presenting elevated credit risk and therefore require increased monitoring. Credits rated special mention show clear signs of financial weaknesses or deterioration in

credit worthiness, however, such concerns are not so pronounced that the Company generally expects to experience loss within the short-term. Such credits typically maintain the ability to perform within standard credit terms and credit exposure is

not as prominent as credits rated more harshly.

17

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

3.

Loans – continued

Credits rated substandard are those in which the normal repayment of principal and interest may be, or has

been, jeopardized by reason of adverse trends or developments of a financial, managerial, economic or political nature, or important weaknesses exist in collateral. A protracted workout on these credits is a distinct possibility. Prompt corrective

action is therefore required to strengthen the Company’s position, and/or to reduce exposure and to assure that adequate remedial measures are taken by the borrower. Credit exposure becomes more likely in such credits and a serious evaluation

of the secondary support to the credit is performed. Credits rated doubtful are those in which full collection of principal appears highly questionable, and which some degree of loss is anticipated, even though the ultimate amount of loss may not

yet be certain and/or other factors exist which could affect collection of debt. Based upon available information, positive action by the Company is required to avert or minimize loss. Credits rated doubtful are generally also placed on non-accrual. The following table summarizes the Company’s internal ratings of its loans:

December 31, 2025

Pass

Watch List

Special

Mention

Sub-standard

Doubtful

Total

Construction and land development

$

91,559,612

$

14,452,877

$

$

$

$

106,012,489

Commercial real estate

325,303,285

18,034,556

5,968,834

349,306,675

Residential real estate

162,247,856

1,080,969

163,328,825

Multifamily real estate

25,797,760

25,797,760

Commercial

128,076,022

24,439,335

2,269,585

154,784,942

Agricultural

16,328,267

57,663

16,385,930

Consumer and other

996,482

996,482

Total

$

750,309,284

$

58,007,737

$

$

8,296,082

$

$

816,613,103

December 31, 2024

Pass

Watch List

Special

Mention

Sub-standard

Doubtful

Total

Construction and land development

$

92,514,016

$

8,063,653

$

$

$

$

100,577,669

Commercial real estate

319,196,220

7,150,762

326,346,982

Residential real estate

155,070,971

2,143,401

1,510

157,215,882

Multifamily real estate

25,159,210

25,159,210

Commercial

121,891,662

6,019,367

14,400,912

58,312

142,370,253

Agricultural

19,286,969

19,286,969

Consumer and other

1,187,320

5,354

1,192,674

Total

$

734,306,368

$

23,377,183

$

14,400,912

$

65,176

$

$

772,149,639

18

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

3.

Loans – continued

The following table summarizes the activity in the allowance for credit losses by portfolio segment for the

years ended December 31, 2025, and 2024:

December 31, 2025

Construction and

land development

Commercial

real estate

Residential

real estate

Multifamily

real estate

Commercial

Agricultural

Consumer and

other

Total

Allowance for credit losses:

Beginning balance

$

872,408

$

3,102,847

$

1,482,330

$

75,930

$

1,533,571

$

57,439

$

10,046

$

7,134,571

Provision for (Recapture of) credit loss expense

15,473

205,789

53,697

1,695

5,368,598

(20,834

)

3,244

5,627,662

Loan charged-off

(4,920,820

)

(3,793

)

(4,924,613

)

Recoveries collected

23

5,000

5,023

Total ending allowance balance

$

887,881

$

3,308,636

$

1,536,027

$

77,625

$

1,981,372

$

41,605

$

9,497

$

7,842,643

December 31, 2024

Construction and

land development

Commercial

real estate

Residential

real estate

Multifamily

real estate

Commercial

Agricultural

Consumer and

other

Total

Allowance for credit losses:

Beginning balance

$

1,013,721

$

2,363,546

$

1,320,703

$

105,362

$

1,364,168

$

94,673

$

16,760

$

6,278,933

Provision for (Recapture of) credit loss expense

(141,313

)

739,301

161,627

(29,432

)

182,864

(51,663

)

37,908

899,292

Loan charged-off

(13,513

)

(46,290

)

(59,803

)

Recoveries collected

53

14,429

1,667

16,149

Total ending allowance balance

$

872,408

$

3,102,847

$

1,482,330

$

75,930

$

1,533,572

$

57,439

$

10,045

$

7,134,571

Provision for credit loss expense included in the accompanying consolidated statements of income and comprehensive income

totaled $5,571,709 for the year ended December 31, 2025, of which $5,627,662 is related to provision for credit loss expense on loans and a recapture of $55,953 of provision for credit loss expense on

off-balance sheet credit exposures. For the year ended December 31, 2024, provision for credit loss expense totaled $877,193, of which $899,292 is related to provision for credit loss expense on loans and

a recapture of $22,099 of provision for credit loss expense on off-balance sheet credit exposures.

19

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

3.

Loans – continued

Collateral dependent loans

The Company has certain loans for which repayment is dependent upon the operation or sale of collateral, due to the borrower experiencing financial difficulty.

The underlying collateral may vary based on the type of loan. The following table details the amortized cost of collateral-dependent loans as of December 31, 2025 and 2024:

December 31,

2025

December 31,

2024

Construction and land development

$

$

Commercial real estate

Residential real estate

Multifamily real estate

Commercial

879,271

58,312

Agricultural

Consumer and other

Total

$

879,271

$

58,312

For the years ended December 31, 2025 and 2024, the Company individually evaluated collateral-dependent loans; however,

the Company does not believe the collateral has sufficient value to rely on for repayment. Accordingly, the Company recorded a specific reserve of $284,725 and $58,312 based on the fair value of the collateral as of December 31, 2025 and 2024,

respectively.

For the years ended December 31, 2025 and 2024, collateral-dependent loans were primarily secured by all notes and borrowings

(“ANB”) under Commercial and Industrial (“C&I”) lending arrangements, and secured by a blanket security interest in substantially all business assets of borrowers. Such collateral typically includes equipment, machinery,

inventory, accounts receivable, general intangibles, and other operating assets used in the borrower’s business.

Loan modifications to borrowers

experiencing financial difficulty

During the year ended December 31, 2025, the Company granted modifications to certain borrowers experiencing

financial difficulty. These modifications may include principal forgiveness, interest rate reductions, payment delays, and term extensions (or a combination thereof). As of December 31, 2025 and 2024, the amortized cost of loans that were

modified was $102,163 and $319,000, respectively, which relates to certain SBA loans in the portfolio reported as commercial loans. The Company had no loans that experienced a payment default during the year ended December 31, 2025 and 2024,

respectively, that were modified in the twelve months preceding the default for borrowers experiencing financial difficulty. As of December 31, 2025, the Company had no commitments to lend additional funds to borrowers whose loans were modified

due to financial difficulty.

20

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

3.

Loans – continued

Related Party Loans

In the ordinary course of business, the Company has and expects to continue to have transactions, including borrowings and deposits, with its executive

officers, directors, and their affiliates. In the opinion of management, such transactions are on the same terms, including interest rates and collateral requirements, as those prevailing at the time for comparable transactions with unaffiliated

persons.

At December 31, 2025 and 2024, the aggregate amount of such loans were $13,591,462 and $12,543,554, respectively. During the year ended

December 31, 2025, there were $1,848,392 in new loans funded or advanced and $800,484 in repayments.

Unfunded commitments to related parties as of

December 31, 2025, amounted to $1,011,608.

4.

Premises and Equipment and Lease Commitments

Premises and equipment in the accompanying consolidated balance sheets consisted of the following:

December 31,

December 31,

2025

2024

Buildings and improvements

$

6,056,298

$

6,058,331

Furniture, fixtures and equipment

3,026,074

2,941,903

Lease right-of-use

assets

8,437,527

8,437,527

Land

28,000

28,000

Subtotal

17,547,899

17,465,761

Accumulated depreciation and amortization

(4,551,391

)

(3,062,084

)

Premises and equipment, net

$

12,996,508

$

14,403,677

Depreciation expense totaled $886,975 and $858,174 during the years ended December 31, 2025 and 2024, respectively, and

is included in occupancy expense in the accompanying consolidated statements of income and comprehensive income.

Lease commitments

The Company leases certain of its branch facilities under operating leases, which are recognized as operating lease right-of-use assets and operating lease liabilities. Lease right-of-use assets are presented within premises and equipment, net

within the accompanying consolidated balance sheets. Lease liabilities are included in accrued interest payable and other liabilities within the accompanying consolidated balance sheets.

The Company had amortized right-of-use assets of $6,944,218 and $7,546,548 as

of December 31, 2025 and 2024, respectively, associated with the leasing of certain branch facilities. Amortization expense related to these right-of-use assets was

$602,331 and $643,669 for the years ended December 31, 2025 and 2024, respectively, and is included in occupancy expense in the accompanying consolidated statements of income and comprehensive income. The lease liabilities recorded as of

December 31, 2025 and 2024 were $7,779,598 and $8,367,429, respectively. As of December 31, 2025 and 2024, the weighted-average lease terms were 9.33 years and 10.33 years, respectively, and the weighted-average discount rate was 4.40% for

both periods.

21

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

4.

Premises and Equipment and Lease Commitments – continued

Lease expense totaled $1,243,146 and $1,306,507during the years ended December 31, 2025 and 2024,

respectively, and is included in occupancy expense in the accompanying consolidated statements of income and comprehensive income.

The future

minimum lease payments for branch facilities operating leases accounted for using ASC 842 at December 31, 2025 were as follows:

Year Ending December 31,

Amount

2026

$

993,889

2027

1,014,406

2028

978,830

2029

918,533

2030

936,911

Thereafter

4,885,447

Total undiscounted lease liability

9,728,016

Less:

Discount on cash flows

(1,948,418

)

Total operating lease liability

$

7,779,598

5.

Equity Securities

Marketable Equity Securities

The Company has an

investment in a Community Reinvestment Act (CRA) mutual fund which is accounted for at fair value. The investment was valued at $2,219,999 and $2,086,556 at December 31, 2025 and 2024, respectively.

Nonmarketable Equity Securities

The Bank, as a member of

the Federal Home Loan Bank of Dallas, is required to maintain an investment in capital stock of each. No ready market exists for such stock, and they have no quoted market values. For reporting purposes, this stock is assumed to have a value equal

to cost.

In addition to the Bank’s required investments, the Company holds other nonmarketable securities, including CRA investments and a

foreclosed asset in the form of private stock. These investments also do not have a ready market, and their values are not quoted on any exchange.

The

Company’s investments in nonmarketable equity securities are as follows:

December 31,

December 31,

2025

2024

Federal Home Loan Bank of Dallas Stock

$

2,972,400

$

2,827,500

Other nonmarketable equity securities

2,222,510

1,867,074

Total

$

5,194,910

$

4,694,574

22

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

6.

Core Deposit Intangibles

Assigned costs and accumulated amortization are as follows:

December 31,

December 31,

2025

2024

Core deposit intangible, gross

$

2,460,908

$

2,460,908

Accumulated amortization

(1,664,926

)

(1,418,830

)

Total

$

795,982

$

1,042,078

Amortization expense for the years ended December 31, 2025 and 2024 totaled $246,096 for both periods, and is included in

other noninterest expense in the accompanying consolidated statements of income and comprehensive income. Core deposit intangibles are being amortized over 10 years and the estimated aggregate future amortization expense remaining as of

December 31, 2025 is as follows:

Year Ending December 31,

Amount

2026

$

246,096

2027

246,096

2028

233,290

2029

70,500

Total

$

795,982

7.

Deposits

Deposits in the accompanying consolidated balance sheets consisted of the following:

December 31,

December 31,

2025

2024

Noninterest-bearing demand deposits

$

151,591,813

$

147,260,664

NOW and money market accounts

529,381,109

472,359,908

Savings accounts

3,322,384

3,324,515

Time deposits greater than $250,000

71,968,556

61,672,948

Time deposits less than $250,000

108,166,904

109,387,002

Total deposits

$

864,430,766

$

794,005,037

23

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

7.

Deposits – continued

The scheduled maturities of time deposits are as follows at December 31, 2025:

Year Ending December 31,

Amount

2026

$

133,111,479

2027

39,047,464

2028

7,553,797

2029

411,797

2030

10,923

Total

$

180,135,460

Related Party Deposits

Deposits received from related parties at December 31, 2025 and 2024 totaled $13,003,303 and $15,288,120, respectively.

8.

Other Borrowings

The Company has unused federal funds lines available from commercial banks of approximately $42,700,000 and $52,700,000 at December 31, 2025 and 2024,

respectively.

As of December 31, 2025, the Company had outstanding long-term advances from the Federal Home Loan Bank (FHLB) totaling $40,000,000,

with $30,000,000 maturing in 2027 and $10,000,000 maturing in 2028, at a weighted-average interest rate of 4.51%. Additionally, the Company had approximately $293,080,600 in available credit under its FHLB blanket lien as of December 31, 2025.

At December 31, 2024, the Bank had long-term advances from the FHLB totaling $40,000,000.

In 2021, the Company established a $10,000,000 line of credit with a correspondent bank. Subsequent increases to $15,000,000 and $20,000,000 occurred in 2022

and 2024, respectively. The line, secured by capital stock of the Bank, matures in May 2026. As of December 31, 2025 and 2024, there were no outstanding amounts under the line, respectively.

9.

Income Taxes

Income tax expense was approximately $2.040 million and $2.050 for the years ended December 31, 2025 and 2024, respectively. The Company’s

effective tax rate was 24.62% and 22.91% for the years ended December 31, 2025 and 2024, respectively. The effective tax rate is affected by the immaterial income tax effects of nondeductible expenses related to stock options, among other

things.

24

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

9.

Income Taxes– continued

Deferred income taxes reflect the net tax effects of temporary differences between the recorded amounts of

assets and liabilities for financial reporting purposes and the amounts used for income tax purposes.

December 31,

December 31,

2025

2024

Current expense

$

2,344,339

$

2,458,042

Deferred benefit

(304,559

)

(408,451

)

Income tax expense

$

2,039,780

$

2,049,591

Significant components of the Company’s deferred tax assets and liabilities are presented in the table below.

December 31,

December 31,

2025

2024

Deferred tax assets:

Allowance for credit losses

$

1,675,698

$

1,498,266

Reserve for unfunded commitments

112,104

106,424

Deferred loan costs

389,943

375,272

Leases

right-of-use assets

175,176

172,385

Unrealized losses on investment securities available-for-sale

732,796

1,203,545

Other

122,513

101,772

Total deferred tax assets

3,208,230

3,457,664

Deferred tax liabilities:

Premises and equipment

151,361

265,801

Core deposit intangible

Accrual to cash

419,072

460,447

Goodwill

387,414

338,106

Other

83,517

60,254

Total deferred tax liabilities

1,041,364

1,124,608

Net deferred tax asset

$

2,166,866

$

2,333,056

GAAP prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of

a tax position taken or expected to be taken in a tax return. Benefits from tax positions should be recognized in the consolidated financial statements only when it is more likely than not that the tax position will be sustained upon examination by

the appropriate taxing authority that would have full knowledge of all relevant information. A tax position that meets the more-likely-than-not recognition threshold is measured at the largest amount of

cumulative benefit that is greater than fifty percent likely of being realized upon ultimate settlement. Tax positions that previously failed to meet the more-likely-than-not recognition threshold should be

recognized in the first subsequent financial reporting period in which that threshold is met. Previously recognized tax positions that no longer meet the more-likely-than-not recognition threshold should be

derecognized in the first subsequent financial reporting period in which that threshold is no longer met. Current authoritative accounting guidance also provides guidance on the accounting for and disclosure of unrecognized tax benefits, interest,

and penalties. The Company files income tax returns in the U.S. federal jurisdiction

25

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

10.

Off-Balance Sheet Arrangements, Commitments and Contingencies

Financial Instruments with

Off-Balance Sheet Risk

The Company is a party to financial instruments with

off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit. These

instruments involve, to varying degrees, elements of credit risk in excess of the amount recognized on the balance sheet. The Company’s exposure to credit loss in the event of nonperformance by the other party to the financial instrument for

commitments is represented by the contractual amount of those instruments. The Company uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet

instruments. These commitments were as follows:

December 31,

December 31,

2025

2024

Financial instruments whose contract amounts represent credit risk:

Commitments and extended credit

$

133,127,141

$

140,598,246

Standby letters of credit

10,584,120

6,775,851

Total

$

143,711,261

$

147,374,097

Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition

established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments may expire without being drawn upon, the total commitment amounts do not

necessarily represent future cash requirements. Management evaluates each customer’s credit-worthiness on a case-by-case basis. The amount of collateral obtained,

if deemed necessary by the Company upon extension of credit, is based on management’s credit evaluation of the counterparty.

Standby letters of

credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. Those guarantees are primarily issued to support public and private borrowing agreements and generally have expirations dates

within one year. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers.

Collateral held varies as specified above and is required in instances which the Company deems necessary. In the event the customer does not perform in

accordance with the terms of the agreement with the third party, the Company would be required to fund the commitment. If the commitment is funded, the Company would be entitled to seek recovery from the customer. Although the maximum exposure to

loss is the amount of such commitments, management currently anticipates no material losses from such activities. The Company had an allowance for credit losses on off-balance sheet credit exposures of

$450,829 and $506,783, reported in accrued interest payable and other liabilities, as of December 31, 2025 and 2024, respectively.

Litigation

In the normal course of business, the Company may be involved in various legal proceedings. However, as of the date of these financial statements, the

Company is not involved in any material legal proceedings. In the opinion of management, any potential liability arising from such proceedings would not have a material adverse effect on the consolidated financial statements.

26

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

11.

Fair Value Disclosures

The authoritative guidance for fair value measurements defines fair value as the price that would be received to sell an asset or paid to transfer a liability

in an orderly transaction between market participants. A fair value measurement assumes that the transaction to sell the asset or transfer the liability occurs in the principal market for the asset or liability or, in the absence of a principal

market, the most advantageous market for the asset or liability. The price in the principal (or most advantageous) market used to measure the fair value of the asset or liability shall not be adjusted for transaction costs.

An orderly transaction is a transaction that assumes exposure to the market for a period prior to the measurement date to allow for marketing activities that

are usual and customary for transactions involving such assets and liabilities; it is not a forced transaction. Market participants are buyers and sellers in the principal market that are (i) independent, (ii) knowledgeable, (iii) able to

transact, and (iv) willing to transact.

The authoritative guidance requires the use of valuation techniques that are consistent with the market

approach, the income approach, and/or the cost approach. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets and liabilities. The income approach uses valuation

techniques to convert future amounts, such as cash flows or earnings, to a single present amount on a discounted basis. The cost approach is based on the amount that currently would be required to replace the service capacity of an asset

(replacement costs). Valuation techniques should be consistently applied. Inputs to valuation techniques refer to the assumptions that market participants would use in pricing the asset or liability. Inputs may be observable, meaning those that

reflect the assumptions market participants would use in pricing the asset or liability developed based on market data obtained from independent sources, or unobservable, meaning those that reflect the reporting entity’s own assumptions about

the assumptions market participants would use in pricing the asset or liability developed based on the best information available in the circumstances.

In that regard, the authoritative guidance establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active

markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows:

Level 1 Inputs – Unadjusted quoted prices in active markets for identical assets or liabilities

that the reporting entity has the ability to access at the measurement date.

Level 2 Inputs – Inputs other than quoted prices included in level 1 that are observable for

the asset and liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than

quoted prices that are observable for the asset or liability (for example, interest rates, volatilities, prepayment speeds, loss severities, credit risks, and default rates) or inputs that are derived principally from or corroborated by observable

market data by correlation or other means. Level 2 investments consist primarily of obligations of U.S. government sponsored enterprises and agencies, obligations of state and municipal subdivisions, corporate bonds, and mortgage backed

securities.

Level 3 Inputs – Significant unobservable inputs that reflect an entity’s own assumptions

that market participants would use in pricing the assets or liabilities.

27

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

11.

Fair Value Disclosures – continued

A description of the valuation methodologies used for instruments measured at fair value, as well as the

general classification of such instruments pursuant to the valuation hierarchy, is set forth below.

In general, fair value is based upon quoted market

prices, where available. If such quoted market prices are not available, fair value is based upon internally developed models that primarily use, as inputs, observable market-based parameters. Valuation adjustments may be made to ensure that

financial instruments are recorded at fair value. While management believes the Company’s valuation methodologies are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the

fair value of certain financial instruments could result in a different estimate of fair value at the reporting date.

Marketable Equity

Securities. Securities consist of the Company’s investment in the CRA mutual fund which is valued at the published per share net asset value of shares held by the Company and is classified within Level 1 of the valuation hierarchy.

There are no significant restrictions on redeeming this investment at net asset value.

Investment Securities Available-For-Sale. Securities classified as available-for-sale and trading are reported at fair value utilizing

Level 1, Level 2, and Level 3 inputs. For these securities, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include dealer quotes, market

spreads, cash flows, the United States Treasury yield curve, live trading levels, trade execution data, market consensus prepayments speeds, credit information and the security’s terms and conditions, among other items.

Individually Evaluated Collateral Dependent Loans. The fair value of individually evaluated collateral dependent loans is generally based on the fair

value of the collateral, less costs to sell. Non-real estate collateral may be valued using an appraisal, net book value per the borrower’s financial statements, or aging reports, adjusted or discounted

based on management’s historical knowledge, changes in market conditions from the time of valuation, and management’s expertise and knowledge of the client and the client’s business (Level 3).

Foreclosed Assets. Assets acquired through or instead of loan foreclosure are initially recorded at fair value less estimated costs to sell,

establishing a new cost basis. These assets are subsequently accounted for at the lower of cost or fair value less estimated costs to sell. Fair value is typically determined based on unobservable inputs, such as discounted cash flow models,

comparable transactions, or appraisals. Adjustments are routinely made during the valuation process based on changes in assumptions or market conditions. The fair value of these assets is classified as a Level 3 measurement in the fair value

hierarchy due to the reliance on unobservable inputs. Repossessed assets acquired through foreclosure totaled $188,475 and $1,327,944 during the years ended December 31, 2025 and 2024, respectively. Based on management’s assessment, no

valuation allowance was considered necessary as of December 31, 2025 or 2024, as the fair value of the collateral exceeded the related carrying amounts, and no write-downs or sales of repossessed assets were required or recorded during the

years ended December 31, 2025 and 2024.

The following table summarizes financial assets and financial liabilities measured at fair value as of

December 31, 2025 and 2024, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value:

Level 1

Level 2

Level 3

Total

December 31, 2025

Inputs

Inputs

Inputs

Fair Value

Assets at fair value on a recurring basis:

Marketable equity securities

$

2,219,999

$

$

$

2,219,999

Investment securities

available-for-sale

73,563,444

73,563,444

Assets at fair value on a nonrecurring basis:

Individually evaluated collateral dependent loans

879,271

879,271

Foreclosed assets

1,516,419

1,516,419

Total

$

2,219,999

$

73,563,444

$

2,395,690

$

78,179,133

28

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

11.

Fair Value Disclosures – continued

Level 1

Level 2

Level 3

Total

December 31, 2024

Inputs

Inputs

Inputs

Fair Value

Assets at fair value on a recurring basis:

Marketable equity securities

$

2,086,556

$

$

$

2,086,556

Investment securities

available-for-sale

77,814,751

77,814,751

Assets at fair value on a nonrecurring basis:

Individually evaluated collateral dependent loans

58,312

58,312

Foreclosed assets

1,327,944

1,327,944

Total

$

2,086,556

$

77,814,751

$

1,386,256

$

81,287,563

Certain financial assets and financial liabilities are measured at fair value on a nonrecurring basis, that is, the

instruments are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment).

12.

Stock Incentive Plan

In 2018, the Company adopted the 2018 Equity Incentive Plan (the “Plan”) to further promote the interests of the Company by enabling the Company to

attract, retain, and motivate, employees, directors, and consultants. The Plan allows for performance-based incentive awards and various equity-based opportunities, including stock options, restricted common stock, restricted stock units, stock

appreciation rights, performance units, performance shares and other stock-based awards. In 2021, the 2018 Equity Incentive Plan was replaced by the 2021 Equity Incentive Plan (the “2021 Plan”). The 2021 Plan increased authorized shares

from 450,000 to 750,000 shares to be issued pursuant to all awards issued under the 2021 Plan. In 2023, the 2021 Plan was amended to increase the number of shares of Common Stock that may be issued under the Plan by 250,000 shares of Common Stock,

resulting in a total of 1,000,000 shares of Common Stock that may be issued under the Plan. Certain option and share awards provide for accelerated vesting if there is a change in control, as defined in the plan. As of December 31, 2025 and

2024, the total amount of remaining shares available to be issued under the respective plans totaled 435,470 and 447,207, respectively.

During 2025 and

2024, the Company granted stock options to certain individuals who serve as directors, executive officers, and other key employees of the Company. These stock options were granted with an exercise price of $16 per option, vest ratably over 5 years

and have a 10-year contractual term.

Compensation costs for stock options totaled $148,203 and $75,700 for

the years ended December 31, 2025 and 2024, respectively, for stock options and is included in stock-based compensation in the accompanying statements of income and comprehensive income.

The fair value of each option award is estimated on the date of grant using a Black Scholes option-pricing model. The Company uses historical option exercise

and termination data to estimate the expected term the options are expected to be outstanding. The risk-free rate is based on the U.S. Treasury yield curve in effect at the time of grant. The expected dividend yield is calculated using historical

dividend amounts and the stock price at the option issue date.

29

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

12.

Stock Incentive Plan - continued

The fair value of options granted was determined using the following weighted-average assumptions as of grant

date.

2025

2024

Expected volatility

10.0

%

10.0

%

Expected dividends

0.0

%

0.0

%

Expected term (in years)

7.5

7.5

Risk-free rate

4.23

%

4.11

%

A summary of option activity under the plan as of December 31, 2025 and 2024 and changes during the years then ended are

as follows:

Weighted-Average

Weighted-Average

Remaining

Shares

Exercise Price

Contractual Term

Outstanding at January 1, 2024

313,768

$

11.25

6.0

Granted

5,750

16.00

9.4

Exercised

(600

)

14.00

6.6

Settled

(500

)

10.80

5.2

Forfeited

(1,850

)

13.24

7.1

Outstanding at December 31, 2024

316,568

11.29

5.1

Granted

33,750

16.00

9.3

Exercised

(300

)

12.00

2.0

Settled

(8,300

)

13.02

5.8

Forfeited

(20,450

)

15.39

7.7

Outstanding at December 31, 2025

321,268

$

11.51

4.4

Exercisable at December 31, 2025

265,368

$

10.63

3.6

The weighted-average grant-date fair value of options granted during the years ended December 31, 2025 and 2024, was

$4.58 and $4.49, respectively.

A summary of the status of the Company’s nonvested shares as of December 31, 2025 and 2024 and changes during

the years ended, is presented below:

Weighted-Average

Grant-Date

Shares

Fair Value

Non-vested at January 1, 2024

86,300

$

2.95

Granted

5,750

4.49

Vested

(33,350

)

2.52

Forfeited

(1,850

)

2.61

Non-vested at December 31, 2024

56,850

3.37

Granted

33,750

4.58

Vested

(14,250

)

2.17

Forfeited

(20,450

)

3.63

Non-vested at December 31, 2025

55,900

$

4.31

30

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

12.

Stock Incentive Plan - continued

As of December 31, 2025, there was $240,929 of total unrecognized compensation costs related to

nonvested stock options. The cost is expected to be recognized over the next 5 years. The total fair values of shares vested during the years ended December 2025 and 2024, was $30,923 and $84,042, respectively.

The Company granted 0 and 58,500 shares of restricted stock during 2025 and 2024, respectively. There were 2,063 shares forfeited in 2025 and no shares

forfeited in 2024. Restricted stock issued in 2024 had a per-share cost of $16 and a vesting period of 1 to 5 years. The Company recognized expenses of $404,689 and $312,500 related to its restricted stock

grants for the years ended December 31, 2025 and 2024, respectively. These expenses are included in stock-based compensation in the accompanying statements of income and comprehensive income. During 2025 and 2024, respectively, 25,206 and

16,896 shares became fully vested. As of December 31, 2025, there was $628,300 of total unrecognized compensation costs related to nonvested restricted stock granted under the plan. That cost is expected to be recognized over a weighted average

period of 1.89 years.

During 2024, the Bank issued 23,500 Restricted Stock Units (RSUs) to certain employees and directors, tied to specific financial

metrics. These RSUs, with a grant date fair value of $16 per share, will vest over three years, contingent on meeting predetermined performance criteria. The RSUs represent an equity interest in the Bank, providing recipients with potential

ownership, subject to the vesting conditions. No RSU’s were issued in 2025.

Stock-based compensation expense related to these RSUs of $164,508 was

recognized for the year ended December 31, 2025. The unrecognized compensation cost associated with unvested awards was $258,492 as of December 31, 2025 and will be recognized over a period of 1.5 years.

13.

Regulatory Matters

The Bank is subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can

initiate certain mandatory (and possibly additional discretionary) actions by regulators that, if undertaken, could have a direct material effect on the consolidated financial statements. Under capital adequacy guidelines and the regulatory

framework for prompt corrective action, a Bank must meet specific capital guidelines that involve quantitative measures of its assets, liabilities, and certain off-balance sheet items as calculated under

regulatory accounting practices. A Bank’s capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors.

Quantitative measures established by regulation to ensure capital adequacy require the Bank to maintain minimum amounts and ratios (set forth in the table

below) of total capital, Tier I capital and common equity Tier 1 capital (as defined in the regulations) to risk weighted assets (as defined), and of Tier I capital to average assets (as defined). Management believes, as of December 31, 2025

and 2024, that the Bank meets all capital adequacy requirements to which it is subject. As of December 31, 2025 and 2024, the Bank’s capital ratios exceeded those levels necessary to be categorized as “well capitalized” under

the regulatory framework for prompt corrective action. To be categorized as “well capitalized” the Bank must maintain minimum total risk-based, Tier I risk-based, common equity Tier 1 risk-based and Tier I leverage ratios as set forth in

the table. There are no conditions or events since December 31, 2025, that management believes have changed the Bank’s category.

31

KEYSTONE BANCSHARES, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

13.

Regulatory Matters– continued

A comparison of the Bank’s actual capital amounts and ratios to required capital amounts and ratios

under current regulations is presented in the following table (dollar amounts in thousands):

To Be Well Capitalized under

Actual

For Capital Adequacy Purposes

Basel III Fully Phased-In

Prompt Corrective

Action Provisions

Amount

Ratio

Amount

Ratio

Amount

Ratio

As of December 31, 2025

Total capital

(to risk-weighted assets)

$

108,223

12.96

%

$87,656

10.5

%

$83,482

10.0

%

Tier I capital

(to risk-weighted assets)

$

99,929

11.97

%

$70,960

8.5

%

$66,786

8.0

%

Common equity tier 1 capital

(to risk-weighted assets)

$

99,929

11.97

%

$58,438

7.0

%

$54,263

6.5

%

Tier I capital

(to average assets)

$

99,929

9.41

%

$42,473

4.0

%

$53,091

5.0

%

As of December 31, 2024

Total capital

(to risk-weighted assets)

$

99,971

12.83

%

$81,815

10.5

%

$77,919

10.0

%

Tier I capital

(to risk-weighted assets)

$

92,329

11.85

%

$66,231

8.5

%

$62,335

8.0

%

Common equity tier 1 capital

(to risk-weighted assets)

$

92,329

11.85

%

$54,543

7.0

%

$50,647

6.5

%

Tier I capital

(to average assets)

$

92,329

9.88

%

$37,380

4.0

%

$46,725

5.0

%

For capital adequacy purposes, Basel III fully phased-in percentages represent the

minimum capital ratios, plus, as applicable, the fully phased-in 2.5% capital buffer under the Basel III Capital Rules.

Under banking law, there are legal restrictions limiting the amount of dividends the Bank can declare. Approval of the regulatory authorities is required if

the effect of the dividends declared would cause regulatory capital of the Bank to fall below specified minimum levels.

14.

Employee Benefit Plan

The Company maintains a 401(k) employee benefit plan and substantially all employees that complete at least one hour of service during the plan year may

participate. The Company matches a portion of each employee’s contribution and may, at its discretion, make additional contributions. During the years ended December 31, 2025 and 2024, the Company contributed $375,847 and $368,691 to the

plan, respectively and is included in salaries and employee benefits on the accompanying consolidated statements of income and comprehensive income.

15.

Subsequent Events

The Company evaluated all subsequent events and transactions for potential recognition or disclosure through April 14, 2026, the date the consolidated

financial statements were available for issuance. On February 1, 2026, Third Coast Bancshares, Inc., a Texas-based bank holding company headquartered in Humble, Texas, completed its merger with Keystone Bancshares, Inc. (“Keystone”)

pursuant to an Agreement and Plan of Reorganization dated October 22, 2025. The transaction was completed through a series of mergers, beginning with the merger of a wholly owned subsidiary of Third Coast Bancshares into Keystone, followed by

the merger of Keystone into Third Coast Bancshares. Immediately thereafter, Keystone Bank merged with and into Third Coast Bank, with Third Coast Bank surviving. As a result of these transactions, Keystone Bancshares and Keystone Bank were fully

integrated into Third Coast Bancshares and Third Coast Bank, respectively.

32

EX-99.2

EX-99.2

Filename: d306467dex992.htm · Sequence: 4

EX-99.2

Exhibit 99.2

UNAUDITED PRO FORMA CONDENSED CONSOLIDATED COMBINED FINANCIAL INFORMATION

The following unaudited pro forma condensed consolidated combined financial information of Third Coast Bancshares, Inc. (“Third Coast”) as of and

for the year ended December 31, 2025, is presented to show the impact on Third Coast’s historical financial position and results of operations of:

the merger; and

the issuance of common stock, par value $1.00 per share, of Third Coast (“Third Coast common stock”)

to Keystone Bancshares, Inc. (“Keystone”) shareholders and the cash consideration to be paid to Keystone shareholders in connection with the merger.

As a result of the merger, Keystone shareholders were entitled to receive, for each outstanding share of common stock, par value $1.00 per share, of Keystone,

(i) 0.45925 shares (the “exchange ratio”) of Third Coast common stock or (ii) without interest, an amount of cash equal to the product of (a) the exchange ratio, multiplied by (b) the volume-weighted average price per

share of Third Coast common stock for a 20 trading day period, starting with the opening of trading on the 21st trading day prior to the calculation date (defined as the close of business on the fifth business day immediately preceding the closing

date of the merger, or such other date as mutually agreed to by the parties to the merger agreement) to the closing of trading on the day prior to the calculation date, rounded to the nearest cent, as reported by Bloomberg Finance L.P. (such amount

of cash, the “Cash Election Consideration”), at the election of the Keystone shareholders, subject to downward adjustment of the exchange ratio as described in the merger agreement. The calculation of the aggregate merger consideration

assumes that Keystone shareholders elected to receive aggregate Cash Election Consideration of $20,000,000 and that no downward adjustment was made as described in the merger agreement. In addition, the unaudited pro forma condensed consolidated

combined financial information and explanatory notes are based upon the following assumptions:

a closing price of Third Coast common stock of $38.01, which was the closing price of Third Coast common stock on

December 31, 2025; and

the sum of Keystone’s capital, surplus and retained earnings accounts less all intangible assets,

calculated as of the calculation date and in accordance with generally accepted accounting principles of the United States consistently applied, and adjusted to reflect the payment of or accrual for all Keystone Merger Costs (as defined in the

merger agreement) on an after-tax basis to the extent deducible for tax purposes equaled or exceeded $94,576,000.

The unaudited Pro Forma Condensed Consolidated Combined Balance Sheet reflects the historical position of Third Coast and Keystone as of December 31,

2025, with pro forma adjustments based on the assumption that the merger was completed on December 31, 2025. The pro forma adjustments are based on the acquisition method of accounting. The unaudited Pro Forma Condensed Consolidated Combined

Statements of Income assume that the merger was completed on January 1, 2025. The adjustments are based on information available and certain assumptions that Third Coast believes are reasonable. The pro forma does not consider any potential

impacts of current market conditions on revenues, potential revenue enhancements, anticipated cost savings and expense efficiencies, one-time earnings impact of mergers costs and provisioning, or asset

dispositions among other factors. The final allocation of the purchase price for Keystone between shareholders’ equity and goodwill will be determined after the merger is completed and after completion of thorough analyses to determine the

fair values of Keystone’s tangible and identifiable intangible assets and liabilities as of the date the merger is completed. Any change in the fair value of the net assets of Keystone will change the amount of the purchase price allocable to

goodwill. Further, changes that would affect shareholders’ equity at Keystone, such as net income from December 31, 2025 through the date the merger is completed, will also change the amount of goodwill recorded. In addition, the final

adjustments may be different from the unaudited pro forma adjustments presented in this filing.

The following unaudited pro forma condensed consolidated

combined financial information and related notes are based on and should be read in conjunction with (i) the historical audited consolidated financial statements of Third Coast and the related notes included in Third Coast’s Annual Report

on Form 10-K for the year ended December 31, 2025, and (ii) the historical audited consolidated financial statements of Keystone and the related notes included in Exhibit 99.1 to this Form 8-K.

The unaudited pro forma condensed consolidated combined financial information is intended for illustrative

purposes only and is not necessarily indicative of the actual financial position or actual operating results of the combined company or of the financial position or operating results of the combined company that would have occurred had the merger

been in effect as of the date or for the periods presented.

Unaudited Pro Forma Condensed Consolidated Combined Balance Sheet

As of December 31, 2025

(Dollars in thousands)

Third Coast

Historical

Keystone

Historical

Pro Forma

Adjustments

Pro Forma

Combined

ASSETS

(Audited)

(Audited)

(unaudited)

(unaudited)

Cash and cash equivalents:

Cash and due from banks

$

175,202

$

102,135

$

(30,774

)

a

$

246,563

Federal funds sold

6,027

1,180

7,207

Total cash and cash equivalents

181,229

103,315

(30,774

)

253,770

Interest bearing time deposits in other banks

267

267

Investment securities

available-for-sale

383,192

73,563

456,755

Investment securities

held-to-maturity

192,008

192,008

Loans, net of unearned income

4,394,751

814,886

(3,618

)

b

5,206,019

Allowance for loan losses

(43,949

)

(7,842

)

3,412

c

(48,379

)

Accrued interest receivable

29,236

3,629

32,865

Premises and equipment, net

24,789

6,053

30,842

Bank-owned life insurance

76,357

76,357

Non-marketable equity securities, at cost

16,424

5,195

21,619

Deferred tax asset, net

6,450

2,167

(2,570

)

e

6,047

Derivative assets

2,544

2,544

Right-of-use asset

- operating leases

17,066

6,944

24,010

Goodwill and other intangible assets

18,680

6,576

24,785

d

50,041

Other assets

41,715

4,076

45,791

Total assets

$

5,340,759

$

1,018,562

$

(8,765

)

$

6,350,556

LIABILITIES AND SHAREHOLDERS’ EQUITY

Deposits:

Noninterest bearing

$

495,000

$

151,592

$

646,592

Interest bearing

4,131,888

712,839

388

f

4,845,115

Total deposits

4,626,888

864,431

388

5,491,707

Accrued interest payable

5,957

751

6,708

Derivative liabilities

3,142

3,142

Lease liability - operating leases

18,130

7,780

25,910

Other liabilities

36,775

1,292

38,067

FHLB advances

40,000

40,000

Line of credit - Senior Debt

37,875

37,875

Note payable - Subordinated Debentures, net

80,965

80,965

Total liabilities

4,809,732

914,254

388

5,724,374

Shareholders’ equity:

Preferred stock

66,160

66,160

Common stock

13,970

6,700

(4,152

)

g

16,518

Retained earning/Surplus

441,076

100,415

(7,808

)

h

533,683

Accumulated other comprehensive income

10,920

(2,757

)

2,757

10,920

Treasury stock: at cost

(1,099

)

(50

)

50

(1,099

)

Total shareholders’ equity

531,027

104,308

(9,153

)

626,182

Total liabilities and shareholders’ equity

$

5,340,759

$

1,018,562

$

(8,765

)

$

6,350,556

Unaudited Pro Forma Condensed Consolidated Combined Statement of Income

For the Year Ended December 31, 2025

(Dollars in thousands,

except per share amounts)

Third

Coast

Historical

Keystone

Historical

Pro Forma

Adjustments

Pro Forma

Combined

Interest income:

Loans, including fees

$

316,215

$

56,549

$

157

aa

$

372,921

Investment securities

available-for-sale

23,951

2,797

1,152

bb

27,900

Investment securities

held-to-maturity

7,170

7,170

Federal funds sold and other

6,694

4,367

11,061

Total interest income

354,030

63,713

1,309

419,052

Interest expense:

Deposit accounts

150,321

26,389

cc

176,710

FHLB advances and other borrowings

8,492

2,002

10,494

Total interest expense

158,813

28,391

187,204

Net interest income

195,217

35,322

1,309

231,848

Provision for credit losses

7,588

5,572

13,160

Net interest income after provision for credit losses

187,629

29,750

1,309

218,688

Noninterest income:

Service charges and fees

10,759

480

11,239

Earnings on bank-owned life insurance

3,017

3,017

Loss on sale of investment securities available-for-sale

(610

)

(610

)

Gain on sales of SBA loans

74

74

Gain on sale of loans

321

321

Other

413

859

1,272

Total noninterest income

13,653

1,660

15,313

Noninterest expense:

Salaries and employee benefits

77,189

12,748

89,937

Occupancy and equipment expense

11,323

2,591

13,914

Legal and professional

7,462

1,315

8,777

Data processing and network expense

4,572

1,469

6,041

Regulatory assessments

4,833

795

5,628

Advertising and marketing

2,144

280

2,424

Software purchases and maintenance

4,569

1,049

5,618

Loan operations and other real estate owned expense

1,134

1,134

Telephone and communications

550

550

Other

4,761

2,878

1,283

dd

8,922

Total noninterest expense

118,537

23,125

1,283

142,945

Net income before income tax expense

82,745

8,285

26

91,056

Income tax expense

16,454

2,040

5

ee

18,499

Net income

66,291

6,245

21

72,557

Preferred stock dividends declared

4,750

4,750

Net income available to common shareholders

$

61,541

$

6,245

$

21

$

67,807

Earnings per common share:

Basic earnings per share

$

4.45

$

4.01

Diluted earnings per share

$

3.79

$

3.29

Notes to Unaudited Pro Forma Condensed Consolidated Combined Financial Information

The following pro forma adjustments have been reflected in the unaudited pro forma condensed consolidated combined financial information. All adjustments are

based on current assumptions and valuations which are subject to change.

Keystone financial information includes immaterial reclassifications to align

with Third Coast financial reporting.

(a)

This adjustment includes the cash portion of the merger consideration of $20 million and estimated pre-tax direct-incremental merger and stock issuance costs of $13.0 million ($10.8 million, after-tax).

(b)

This adjustment represents the fair value adjustments on loans. The purchase accounting adjustment for the

acquired loan portfolio is comprised of approximately $3.0 million of credit adjustments for non-purchase credit deteriorated (“PCD”) assets and $588,000 of interest-rate adjustments.

(c)

This adjustment represents the elimination of Keystone’s allowance for credit losses as part of the

purchase accounting transactions, offset by the creation of a $4.4 million credit adjustment on acquired PCD assets.

(d)

This adjustment represents the purchase price allocation for the merger, calculated as follows:

(Dollars in thousands)

Issue 2,547,937 Third Coast shares valued at the closing price for Third Coast common stock on

December 31, 2025

$

99,237

Cash merger consideration, including cash in lieu of fractional shares

20,005

Total purchase price

119,242

Keystone’s equity at book value

(91,840

)

Allocated to loan fair value, less Keystone’s ending allowance

206

Allocated to core deposit intangibles

(12,830

)

Allocated to time deposit fair value

388

Allocated to debt

Allocated to net deferred tax assets

2,570

Estimated goodwill from transaction

$

17,735

Keystone beginning goodwill balance

$

(5,780

)

Net goodwill adjustment

$

11,955

Allocated to core deposit intangibles

12,830

Keystone beginning core deposit intangible

(796

)

Goodwill and other intangible assets adjustment

$

23,989

(e)

This adjustment represents the impact on deferred income taxes and income tax benefits created in the

accounting for the transaction, calculated as follows:

(Dollars in thousands)

Loan fair value adjustments

$

206

Core deposit intangibles

(12,830

)

Deposits fair value adjustments

388

Debt fair value adjustments

Subtotal of fair value adjustments

(12,236

)

Calculated deferred taxes at an estimated rate of 21%

(2,570

)

S Corp to C Corp adjustment at an estimated rate of 21%

Total deferred taxes adjustment

$

(2,570

)

Tax effect of merger expenses (item (a) above)

Tax effect of creation of Allowance for Credit Losses on

non-PCD assets

Total Other asset adjustment

$

(2,570

)

(f)

This adjustment reflects interest-bearing time deposits at their estimated fair values.

(g)

This adjustment represents the elimination of the historical common stock of Keystone, net of the issuance of

2,547,937 shares of Third Coast common stock to shareholders of Keystone. Value of the shares issued is based on the closing price for Third Coast common stock on December 31, 2025.

(h)

This adjustment represents the elimination of the historical Retained earnings/surplus of Keystone, net of after-tax merger expenses and cost of the creation of the allowance for credit losses on non-PCD assets.

(Dollars in

thousands)

For the

Year

Ended

December 31,

2025

(aa)

Adjustment to loan interest income to reflect accretion of loan discount from interest rate fair value adjustments sum of the years digits over an estimated 5.0 years.

$

157

(bb)

Adjustment to security interest income to reflect accretion of discount over an expected 3.0 years.

$

1,152

(cc)

Adjustment to deposit interest expense to reflect the amortization of the time deposit interest rate fair value mark over and estimated 0.75 years.

$

(dd)

Adjustment to reflect amortization of the acquired Core Deposit Intangible straight line over 10 years.

$

1,283

(ee)

Adjustment to reflect income taxes on proforma adjustments at an estimated rate of approximately 21%

$

5

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v3.26.1

Document and Entity Information

Feb. 01, 2026

Cover [Abstract]

Amendment Flag

true

Entity Central Index Key

0001781730

Document Type

8-K/A

Document Period End Date

Feb. 01, 2026

Entity Registrant Name

THIRD COAST BANCSHARES, INC.

Entity Incorporation State Country Code

TX

Entity File Number

001-41028

Entity Tax Identification Number

46-2135597

Entity Address, Address Line One

20202 Highway 59 North

Entity Address, Address Line Two

Suite 190

Entity Address, City or Town

Humble

Entity Address, State or Province

TX

Entity Address, Postal Zip Code

77338

City Area Code

281

Local Phone Number

446-7000

Written Communications

false

Soliciting Material

false

Pre Commencement Tender Offer

false

Pre Commencement Issuer Tender Offer

false

Security 12b Title

Common stock, par value $1.00 per share

Trading Symbol

TCBX

Security Exchange Name

NYSE

Entity Emerging Growth Company

true

Entity Ex Transition Period

false

Amendment Description

On February 2, 2026, Third Coast Bancshares, Inc. (the “Company”) filed with the Securities and Exchange Commission a Current Report on Form 8-K (the “Initial 8-K”) to disclose that it had completed its merger (the “Merger”) with Keystone Bancshares, Inc. (“Keystone”), a Texas corporation, pursuant to the terms of the Agreement and Plan of Reorganization, dated as of October 22, 2025, by and among the Company, Arch Merger Sub, Inc., a Texas corporation and a wholly owned subsidiary of the Company, and Keystone effective February 1, 2026. This Form 8-K/A amends the Initial 8-K to provide financial statements and pro forma financial information for the Merger that are described in parts (a) and (b) of Item 9.01 below. Except as provided in this Form 8-K/A, the Initial 8-K remains unchanged.

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The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.

+ References

No definition available.

+ Details

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dei_DocumentType

Namespace Prefix:

dei_

Data Type:

dei:submissionTypeItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Address Line 1 such as Attn, Building Name, Street Name

+ References

No definition available.

+ Details

Name:

dei_EntityAddressAddressLine1

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Address Line 2 such as Street or Suite number

+ References

No definition available.

+ Details

Name:

dei_EntityAddressAddressLine2

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Name of the City or Town

+ References

No definition available.

+ Details

Name:

dei_EntityAddressCityOrTown

Namespace Prefix:

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Data Type:

xbrli:normalizedStringItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Code for the postal or zip code

+ References

No definition available.

+ Details

Name:

dei_EntityAddressPostalZipCode

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

na

Period Type:

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X

- Definition

Name of the state or province.

+ References

No definition available.

+ Details

Name:

dei_EntityAddressStateOrProvince

Namespace Prefix:

dei_

Data Type:

dei:stateOrProvinceItemType

Balance Type:

na

Period Type:

duration

X

- Definition

A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityCentralIndexKey

Namespace Prefix:

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Data Type:

dei:centralIndexKeyItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Indicate if registrant meets the emerging growth company criteria.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityEmergingGrowthCompany

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Indicate if an emerging growth company has elected not to use the extended transition period for complying with any new or revised financial accounting standards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Securities Act

-Number 7A

-Section B

-Subsection 2

+ Details

Name:

dei_EntityExTransitionPeriod

Namespace Prefix:

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Data Type:

xbrli:booleanItemType

Balance Type:

na

Period Type:

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X

- Definition

Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

+ References

No definition available.

+ Details

Name:

dei_EntityFileNumber

Namespace Prefix:

dei_

Data Type:

dei:fileNumberItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Two-character EDGAR code representing the state or country of incorporation.

+ References

No definition available.

+ Details

Name:

dei_EntityIncorporationStateCountryCode

Namespace Prefix:

dei_

Data Type:

dei:edgarStateCountryItemType

Balance Type:

na

Period Type:

duration

X

- Definition

The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityRegistrantName

Namespace Prefix:

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Data Type:

xbrli:normalizedStringItemType

Balance Type:

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Period Type:

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X

- Definition

The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityTaxIdentificationNumber

Namespace Prefix:

dei_

Data Type:

dei:employerIdItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Local phone number for entity.

+ References

No definition available.

+ Details

Name:

dei_LocalPhoneNumber

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

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Period Type:

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X

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 13e

-Subsection 4c

+ Details

Name:

dei_PreCommencementIssuerTenderOffer

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

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Period Type:

duration

X

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14d

-Subsection 2b

+ Details

Name:

dei_PreCommencementTenderOffer

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

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Period Type:

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X

- Definition

Title of a 12(b) registered security.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b

+ Details

Name:

dei_Security12bTitle

Namespace Prefix:

dei_

Data Type:

dei:securityTitleItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Name of the Exchange on which a security is registered.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection d1-1

+ Details

Name:

dei_SecurityExchangeName

Namespace Prefix:

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Data Type:

dei:edgarExchangeCodeItemType

Balance Type:

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Period Type:

duration

X

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14a

-Subsection 12

+ Details

Name:

dei_SolicitingMaterial

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Trading symbol of an instrument as listed on an exchange.

+ References

No definition available.

+ Details

Name:

dei_TradingSymbol

Namespace Prefix:

dei_

Data Type:

dei:tradingSymbolItemType

Balance Type:

na

Period Type:

duration

X

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Securities Act

-Number 230

-Section 425

+ Details

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Namespace Prefix:

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