Form 8-K

8-K — FIRST BUSEY CORP /NV/

Accession: 0000314489-26-000049

Filed: 2026-07-28

Period: 2026-07-28

CIK: 0000314489

SIC: 6022 (STATE COMMERCIAL BANKS)

Item: Results of Operations and Financial Condition

Item: Regulation FD Disclosure

Item: Financial Statements and Exhibits

Documents

8-K — buse-20260728.htm (Primary)

EX-99.1 (buse_20260728x26q2xex991.htm)

EX-99.2 (buse_20260728x26q2xex992.htm)

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8-K

8-K (Primary)

Filename: buse-20260728.htm · Sequence: 1

buse-20260728

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): July 28, 2026

__________________________________________

First Busey Corporation

(Exact name of Registrant as specified in its charter)

__________________________________________

Nevada

001-42677

37-1078406

(State of Incorporation) (Commission File Number) (I.R.S. Employer Identification No.)

11440 Tomahawk Creek Parkway

Leawood, Kansas 66211

(Address of Principal Executive Offices)

(217) 365-4544

(Registrant’s telephone number, including area code)

N/A

(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, $0.001 par value BUSE Nasdaq Stock Market LLC

Depositary Shares, each representing a 1/40th interest in a share of 8.25% Fixed-Rate Series B Non-Cumulative Perpetual Preferred Stock, $0.001 par value

BUSEP Nasdaq Stock Market LLC

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). ☐

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. ☐

Item 2.02    Results of Operations and Financial Condition.

On July 28, 2026, First Busey Corporation (“Busey”) issued a press release (“Earnings Release”) disclosing financial results for the quarter ended June 30, 2026. A copy of the Earnings Release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

The information in Item 2.02 of this Current Report on Form 8-K and Exhibit 99.1 attached hereto is being “furnished” and will not, except to the extent required by applicable law or regulation, be deemed “filed” by Busey for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (“Exchange Act”), or otherwise subject to the liabilities of that section, nor will any of such information or exhibits be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended (“Securities Act”), or the Exchange Act.

Item 7.01    Regulation FD Disclosure.

On July 28, 2026, Busey published its Earnings Investor Presentation discussing financial results for the quarter ended June 30, 2026. A copy is attached hereto as Exhibit 99.2 and is incorporated herein by reference.

The information in Item 7.01 of this Current Report on Form 8-K and Exhibit 99.2 attached hereto is being “furnished” and will not, except to the extent required by applicable law or regulation, be deemed “filed” by Busey for purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, nor will any of such information or exhibits be deemed incorporated by reference into any filing under the Securities Act or the Exchange Act.

Item 9.01.    Financial Statements and Exhibits.

Exhibit Number

Description of Exhibit

99.1

Earnings Release issued by First Busey Corporation, dated July 28, 2026

99.2

Earnings Investor Presentation issued by First Busey Corporation, dated July 28, 2026

104

Cover Page Interactive Data File (embedded within the Inline XBRL document and included in Exhibit 101)

2

Signature

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, thereunto duly authorized.

FIRST BUSEY CORPORATION

Date:

July 28, 2026

By: /s/ CHRISTOPHER H.M. CHAN

Christopher H.M. Chan

Executive Vice President, Chief Financial Officer

3

EX-99.1

EX-99.1

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Document

F I R S T   B U S E Y   C O R P O R A T I O N

A N N O U N C E S

2 0 2 6

S E C O N D

Q U A R T E R

E A R N I N G S

Q 2  |  2 0 2 6

www.busey.com

INVESTOR CONTACT: Tate McKay, Director of Investor Relations and Corporate Development | 217-351-6709

LEAWOOD, KS, July 28, 2026 (GLOBE NEWSWIRE) – First Busey Corporation (Nasdaq: BUSE) Announces 2026 Second Quarter Earnings.

Net Income

Diluted EPS

Net Interest Margin1

ROAA1

ROATCE1

$63.2 million

$63.7 million (adj)2

$0.69

$0.69 (adj)2

3.72%2

3.62% (adj)2

1.42%2

1.43% (adj)2

14.49%2

14.61% (adj)2

MESSAGE FROM OUR CHAIRMAN, PRESIDENT & CEO

Busey delivered a strong second quarter, with adjusted diluted EPS2 of $0.69, up 9.5% year-over-year. Profitability continued to expand, as adjusted return on average assets2 improved by 22 basis points to 1.43% and adjusted return on average tangible common equity2 improved by 20 basis points to 14.61%. Adjusted net interest margin2 rose by 29 basis points year-over-year to 3.62%, easing just 2 basis points from the prior quarter. Wealth Management posted its third consecutive record quarter in fee income, with net inflows complementing rising market valuations to close the quarter with $16.51 billion in assets under care. Expense discipline drove a 134 basis point year-over-year improvement in the efficiency ratio2, to 54.0%.

Capital strengthened further with Common Equity Tier 1 Capital to Risk Weighted Assets3 rising to 12.53%, even after share repurchases of $128.8 million year to date, including $63.1 million this quarter. Tangible book value per common share2 grew 6.4% year-over-year to $20.40 and 11.7% inclusive of dividends. Deposit growth was significant at 11% annualized during the quarter and demonstrates the primacy and depth of our client relationships. Our conservative approach to credit risk management has led to strong and stable asset quality with net charge-offs at 0.19%.

As we enter the second half of 2026, Busey’s indomitable balance sheet provides the flexibility to support our clients in a volatile environment while continuing to optimize capital allocation to drive long-term value for our shareholders.

Van A. Dukeman

Chairman, President and CEO of First Busey Corporation

FINANCIAL RESULTS

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (unaudited)

Three Months Ended Six Months Ended

(dollars in thousands, except per share amounts) June 30,

2026 March 31,

2026

June 30,

2025

June 30,

2026 June 30,

2025

Total interest income

$ 224,425  $ 225,485  $ 247,446  $ 449,910  $ 414,261

Total interest expense

72,023  71,516  94,263  143,539  157,347

Net interest income

152,402  153,969  153,183  306,371  256,914

Provision for credit losses

2,189  3,058  5,700  5,247  51,293

Net interest income after provision for credit losses

150,213  150,911  147,483  301,124  205,621

Total noninterest income

44,311  42,265  44,863  86,576  66,086

Total noninterest expense

112,635  129,519  127,833  242,154  239,863

Income before income taxes

81,889  63,657  64,513  145,546  31,844

Income taxes

18,713  13,676  17,109  32,389  14,430

Net income

63,176  49,981  47,404  113,157  17,414

Dividends on preferred stock 4,590  4,589  155  9,179  155

Net income available to common stockholders $ 58,586  $ 45,392  $ 47,249  $ 103,978  $ 17,259

Basic earnings per common share

$ 0.69  $ 0.52  $ 0.53  $ 1.21  $ 0.22

Diluted earnings per common share

$ 0.69  $ 0.52  $ 0.52  $ 1.20  $ 0.22

Effective income tax rate

22.85  % 21.48  % 26.52  % 22.25  % 45.31  %

First Busey Corporation (BUSE) | 2026 Q2 — 1

Second quarter 2026 net income for First Busey Corporation, together with its consolidated subsidiaries (“Busey,” the “Company,” “we,” “us,” or “our”) was $63.2 million, or $0.69 per diluted common share, compared to net income of $50.0 million, or $0.52 per diluted common share, for the first quarter of 2026, and $47.4 million, or $0.52 per diluted common share, for the second quarter of 2025. Annualized return on average assets2 and annualized return on average tangible common equity2 were 1.42% and 14.49%, respectively, for the second quarter of 2026.

Pre-provision net revenue2 was $81.6 million for the second quarter of 2026, compared to $67.7 million for the first quarter of 2026 and $64.2 million for the second quarter of 2025. Pre-provision net revenue to average assets2 was 1.83% for the second quarter of 2026, compared to 1.52% for the first quarter of 2026, and 1.35% for the second quarter of 2025.

Adjusted Financial Results

Busey views certain non-operating items, including acquisition-related expenses, restructuring charges, and nonrecurring strategic events, as adjustments to net income reported under U.S. generally accepted accounting principles ("GAAP"). We also adjust for net securities gains and losses to align with industry and research analyst reporting. The objective of our presentation of adjusted earnings and adjusted earnings metrics is to allow investors and analysts to more clearly identify quarterly trends in core earnings performance. Pre-tax non-GAAP adjustments to net income were as follows:

Three Months Ended Six Months Ended

(dollars in thousands) June 30,

2026 March 31,

2026 June 30,

2025 June 30,

2026 June 30,

2025

PRE-TAX NON-GAAP ADJUSTMENTS TO NET INCOME

Net securities (gains) losses $ (2,445) $ 940  $ (5,997) $ (1,505) $ 9,771

Provision for credit losses —  —  4,030  —  49,602

Salaries and employee benefits 2,045  16,124  11,557  18,169  27,435

Data processing —  80  3,964  80  6,266

Furniture and equipment expenses —  —  1  —  1

Professional fees 704  119  317  823  7,611

Other noninterest expense 377  377  761  754  1,313

Total pre-tax non-GAAP adjustments to net income $ 681  $ 17,640  $ 14,633  $ 18,321  $ 101,999

Adjusted net income,2 which excludes the impact of non-GAAP adjustments, was $63.7 million, or $0.69 per diluted common share, for the second quarter of 2026, compared to $63.2 million, or $0.67 per diluted common share, for the first quarter of 2026 and $57.4 million, or $0.63 per diluted common share, for the second quarter of 2025. Annualized adjusted return on average assets2 and annualized adjusted return on average tangible common equity2 were 1.43% and 14.61%, respectively, for the second quarter of 2026.

Adjusted pre-provision net revenue2 was $84.8 million for the second quarter of 2026, compared to $84.4 million for the first quarter of 2026 and $80.8 million for the second quarter of 2025. Adjusted pre-provision net revenue to average assets2 was 1.90% for the second quarter of 2026, compared to 1.89% for the first quarter of 2026 and 1.70% for the second quarter of 2025.

For more information and a reconciliation of non-GAAP measures—which are identified with the End Note labeled as 2—in tabular form, see "Non-GAAP Financial Information."

First Busey Corporation (BUSE) | 2026 Q2 — 2

Net Interest Income

Net interest income decreased by $1.6 million in the second quarter of 2026, compared to the first quarter of 2026, driven largely by lower purchase accounting accretion of $1.2 million. Lower average loan balances led to a decrease in average earning assets during the quarter. Deposit funding costs were 1 basis point lower during the quarter largely due to continued tailwinds from time deposit repricing. Based on our most recent Asset Liability Management Committee model, a +100 basis point parallel rate shock is expected to increase net interest income by 1.8% (relative to a current base rate scenario) over the subsequent twelve-month period. Busey continues to evaluate and execute off-balance sheet hedging and balance sheet strategies as well as embedding rate protection in our asset originations to provide consistent and predictable net interest income performance across different interest rate environments. Deposit balances increased by $392.7 million, or 2.7%, as a result of seasonal public funds inflows and strategic efforts to grow core customer deposits. At June 30, 2026, Busey Bank had $60.0 million of brokered funding, comprising 0.4% of total deposits, consistent with last quarter. Total deposit cost of funds decreased from 1.81% during the first quarter of 2026 to 1.80% during the second quarter of 2026. Deposit inflows allowed for reduction of borrowings by $184.6 million compared to the first quarter of 2026. Busey’s average total cost of funds was 1.89% for the second quarter of 2026, and spot total cost of funds was 1.92% at June 30, 2026.

First Busey Corporation (BUSE) | 2026 Q2 — 3

Net Interest Margin2

Busey’s average balances, annualized yield rates, and net interest margins are presented in the table below:

Three Months Ended

June 30, 2026 March 31, 2026

(dollars in thousands) Average

Balance Income/

Expense

Yield/

Rate(vi)

Average

Balance Income/

Expense

Yield/

Rate(vi)

ASSETS

Interest-bearing bank deposits and federal funds sold

$ 123,868  $ 1,057  3.42  % $ 139,204  $ 1,222  3.56  %

Investment securities(i)(ii)

2,964,414  24,483  3.31  % 2,918,240  23,289  3.24  %

Restricted bank stock

85,153  1,127  5.31  % 81,619  880  4.37  %

Loans held for sale

8,358  122  5.85  % 5,072  73  5.84  %

Portfolio loans(i)(iii)

13,326,579  198,477  5.97  % 13,521,631  200,898  6.03  %

Total interest-earning assets(i)

16,508,372  $ 225,266  5.47  % 16,665,766  $ 226,362  5.51  %

Noninterest-earning assets

1,378,725  1,394,454

Total assets

$ 17,887,097  $ 18,060,220

LIABILITIES AND STOCKHOLDERS’ EQUITY

Interest-bearing transaction deposits

$ 3,203,014  $ 13,463  1.69  % $ 3,124,068  $ 12,505  1.62  %

Savings and money market deposits

5,615,951  32,220  2.30  % 5,687,520  31,964  2.28  %

Time deposits

2,342,629  20,078  3.44  % 2,409,136  21,557  3.63  %

Federal funds purchased and repurchase agreements

169,008  1,098  2.61  % 160,822  896  2.26  %

Borrowings(iv)

450,454  5,164  4.60  % 391,965  4,594  4.75  %

Total interest-bearing liabilities

11,781,056  $ 72,023  2.45  % 11,773,511  $ 71,516  2.46  %

Noninterest-bearing deposits

3,467,436  3,536,830

Other liabilities

240,118  279,607

Stockholders’ equity

2,398,487  2,470,272

Total liabilities and stockholders’ equity

$ 17,887,097  $ 18,060,220

Net interest margin(i)(v)

$ 153,243  3.72  % $ 154,846  3.77  %

___________________________________________

(i)On a tax-equivalent basis and assuming a federal income tax rate of 21.0%.

(ii)Investment securities include debt securities available for sale, debt securities held to maturity, and equity securities.

(iii)Non-accrual loans have been included in average portfolio loans.

(iv)Includes, as applicable, short-term borrowings, long-term borrowings, subordinated notes, and junior subordinated debt owed to unconsolidated trusts.

(v)For a reconciliation of non-GAAP measures, see “Non-GAAP Financial Information.”

(vi)Annualized.

First Busey Corporation (BUSE) | 2026 Q2 — 4

Noninterest Income

Three Months Ended Six Months Ended

(dollars in thousands) June 30,

2026 March 31,

2026 June 30,

2025 June 30,

2026 June 30,

2025

NONINTEREST INCOME

Wealth management fees

$ 19,981  $ 19,370  $ 16,777  $ 39,351  $ 34,141

Payment technology solutions

4,968  5,077  4,956  10,045  10,029

Treasury management services

4,789  4,456  4,569  9,245  7,406

Capital markets income

1,871  2,371  1,254  4,242  2,579

Card services and ATM fees

4,813  4,646  4,880  9,459  8,589

Other service charges on deposit accounts

1,407  1,506  1,513  2,913  3,046

Income on bank owned life insurance

1,637  1,616  1,745  3,253  3,191

Net securities gains (losses)

2,445  (940) 5,997  1,505  (9,771)

Other noninterest income

2,400  4,163  3,172  6,563  6,876

Total noninterest income

$ 44,311  $ 42,265  $ 44,863  $ 86,576  $ 66,086

Busey continues to benefit from its diverse set of product offerings. Total noninterest income increased by 4.8% compared to the first quarter of 2026, primarily due to increases in income from wealth management fees, treasury management services, and net securities gains, partially offset by declines in other noninterest income. Compared to the second quarter of 2025, total noninterest income decreased by 1.2%, primarily due to declines in net securities gains and other noninterest income, partially offset by increases in income from wealth management fees.

Noteworthy changes in noninterest income during the quarter include:

•Wealth management fees increased by $0.6 million, or 3.2%, compared to the first quarter of 2026, primarily due to increases in income from trust fees and seasonal tax preparation fees, partially offset by seasonal declines in income from farm management fees. Compared to the second quarter of 2025, wealth management fees increased by $3.2 million, or 19.1%, with increases primarily attributable to trust fees.

Busey’s Wealth Management division ended the second quarter of 2026 with $16.51 billion in assets under care, compared to $15.65 billion at the end of the first quarter of 2026 and $14.10 billion at the end of the second quarter of 2025. Busey’s portfolio management team continues to focus on long-term returns and managing risk in the face of volatile markets and has outperformed its blended benchmark4 over the last three, five, and seven years.

•Treasury management services increased by $0.3 million, or 7.5%, compared to the first quarter of 2026, primarily due to increases in income from analysis charges.

•Other noninterest income declined by $1.8 million, or 42.3%, compared to the first quarter of 2026, and declined by $0.8 million, or 24.3% compared to the second quarter of 2025. Declines were primarily due to decreases in income from private equity investments, mortgage revenue, and commercial loan sales gains.

First Busey Corporation (BUSE) | 2026 Q2 — 5

Operating Efficiency

Three Months Ended Six Months Ended

(dollars in thousands)

June 30,

2026

March 31,

2026

June 30,

2025

June 30,

2026 June 30,

2025

NONINTEREST EXPENSE

Salaries and employee benefits

$ 67,677  $ 85,230  $ 78,360  $ 152,907  $ 145,923

Data processing

8,868  9,864  14,021  18,732  23,596

Net occupancy expense of premises

7,850  7,652  7,832  15,502  13,631

Furniture and equipment expenses

2,336  2,177  2,409  4,513  4,153

Professional fees

3,041  3,239  2,874  6,280  12,385

Amortization of intangible assets

4,232  4,291  4,592  8,523  7,675

Interchange expense

1,096  1,116  1,297  2,212  2,640

FDIC insurance

2,349  2,451  2,424  4,800  4,591

Other noninterest expense

15,186  13,499  14,024  28,685  25,269

Total noninterest expense

$ 112,635  $ 129,519  $ 127,833  $ 242,154  $ 239,863

Busey remains focused on prudently managing our expense base and operating efficiency. Total noninterest expense decreased by 13.0% compared to the first quarter of 2026, and by 11.9% compared to the second quarter of 2025. Decreases were primarily attributable to declines in expense for salaries and employee benefits and data processing, which were partially offset by increases in other noninterest expense.

Adjusted noninterest expense2, which excludes acquisition and restructuring expenses, was as follows:

Three Months Ended Six Months Ended

(dollars in thousands) June 30,

2026 March 31,

2026 June 30,

2025 June 30,

2026 June 30,

2025

NONINTEREST EXPENSE WITH NON-GAAP ADJUSTMENTS

Salaries and employee benefits

$ 65,632  $ 69,106  $ 66,803  $ 134,738  $ 118,488

Data processing

8,868  9,784  10,057  18,652  17,330

Net occupancy expense of premises

7,850  7,652  7,832  15,502  13,631

Furniture and equipment expenses

2,336  2,177  2,408  4,513  4,152

Professional fees

2,337  3,120  2,557  5,457  4,774

Amortization of intangible assets

4,232 4,291 4,592 8,523 7,675

Interchange expense

1,096  1,116  1,297  2,212  2,640

FDIC insurance

2,349  2,451  2,424  4,800  4,591

Other noninterest expense

14,809  13,122  13,263  27,931  23,956

Adjusted noninterest expense (Non-GAAP)(i)

$ 109,509  $ 112,819  $ 111,233  $ 222,328  $ 197,237

___________________________________________

(i)Beginning in 2026, to better align with industry standards, Busey revised its calculation of adjusted noninterest expense, for all periods presented, to exclude any adjustment for amortization of intangible assets.

Noteworthy changes in noninterest expense during the quarter include:

•Salaries and employee benefits expenses declined by $17.6 million, or 20.6%, compared to the first quarter of 2026, with acquisition and restructuring expenses contributing $14.1 million, which were elevated during the first quarter of 2026 when Busey recorded restructuring costs in connection with the execution of additional synergies related to the CrossFirst acquisition and the departure of Mr. Maddox.

Compared to the second quarter of 2025, salaries and employee benefits expenses declined by $10.7 million, or 13.6%, of which $9.5 million was attributable to declines in acquisition and restructuring expenses, which were elevated in the second quarter of 2025 in connection with the CrossFirst acquisition.

First Busey Corporation (BUSE) | 2026 Q2 — 6

•Data processing expenses declined by $1.0 million, or 10.1%, compared to the first quarter of 2026. Data processing expenses declined by $5.2 million, or 36.8%, compared to the second quarter of 2025, of which $4.0 million was attributable to declines in acquisition and restructuring expenses, which were elevated in the second quarter of 2025 in connection with the CrossFirst acquisition.

•Other noninterest expense increased by $1.7 million, or 12.5%, compared to the first quarter of 2026, and increased by $1.2 million, or 8.3% compared to the second quarter of 2025. Increases were primarily attributable to marketing and business development costs.

The efficiency ratio2 was 54.0% for the second quarter of 2026, compared to 54.8% for the first quarter of 2026, and 55.3% for the second quarter of 2025.

BALANCE SHEET STRENGTH

Busey’s financial strength is built on a long-term conservative operating approach. That focus has endured over time and will continue to guide us in the future.

CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited)

As of

(dollars in thousands) June 30,

2026 March 31,

2026 June 30,

2025

ASSETS

Cash and cash equivalents $ 665,373  $ 288,462  $ 737,983

Interest-bearing time deposits in other banks

14,450  13,725  14,369

Debt securities available for sale

2,265,167  2,215,267  2,217,788

Debt securities held to maturity

703,988  725,540  802,965

Equity securities

16,397  13,951  16,171

Loans held for sale 8,660  5,224  10,497

Portfolio loans 13,195,154  13,459,890  13,808,619

Allowance for credit losses (164,204) (169,054) (183,334)

Restricted bank stock 83,171  81,722  77,112

Premises and equipment, net 191,953  193,322  181,394

Goodwill and other intangible assets, net 471,288  475,520  488,181

Other assets 740,470  733,053  746,995

Total assets $ 18,191,867  $ 18,036,622  $ 18,918,740

LIABILITIES AND STOCKHOLDERS’ EQUITY

Liabilities

Total deposits $ 15,128,745  $ 14,736,060  $ 15,801,772

Securities sold under agreements to repurchase 144,061  156,364  158,030

Borrowings

285,734  470,365  266,913

Other liabilities 250,157  260,811  279,479

Total liabilities 15,808,697  15,623,600  16,506,194

Stockholders’ equity

Retained earnings 395,409  359,162  273,799

Accumulated other comprehensive income (loss) (141,080) (135,553) (155,311)

Other stockholders' equity(i)

2,128,841  2,189,413  2,294,058

Total stockholders’ equity 2,383,170  2,413,022  2,412,546

Total liabilities and stockholders’ equity $ 18,191,867  $ 18,036,622  $ 18,918,740

___________________________________________

(i)Net balance of preferred stock ($0.001 par value), common stock ($0.001 par value), additional paid-in capital, and treasury stock.

First Busey Corporation (BUSE) | 2026 Q2 — 7

Portfolio Loans

Busey remains steadfast in its conservative approach to underwriting and disciplined approach to pricing. Busey’s loan portfolio was comprised of the following:

As of

(dollars in thousands) June 30,

2026 March 31,

2026 June 30,

2025

PORTFOLIO LOANS

Commercial loans:

Commercial and industrial and other commercial

$ 3,959,997  $ 4,124,737  $ 4,476,869

Commercial real estate

5,452,781  5,566,044  5,569,759

Real estate construction

1,027,069  1,052,505  1,041,803

Total commercial loans

10,439,847  10,743,286  11,088,431

Retail loans:

Retail real estate

2,116,360  2,119,621  2,228,959

Retail other

638,947  596,983  491,229

Total retail loans

2,755,307  2,716,604  2,720,188

Total portfolio loans

$ 13,195,154  $ 13,459,890  $ 13,808,619

CRE loans comprised 41.3% of Busey’s total loan portfolio as of June 30, 2026, and CRE properties were 26.3% owner occupied. Owner occupied commercial real estate is generally dependent on the performance of the borrowers’ businesses, whereas non-owner occupied commercial real estate is generally reliant on property cash flows generated by third-party tenants.

As of

(dollars in thousands) June 30,

2026 March 31,

2026 June 30,

2025

COMMERCIAL REAL ESTATE LOANS

Non-owner occupied commercial real estate $ 4,019,517  $ 4,125,785  $ 4,130,131

Owner occupied commercial real estate 1,433,264  1,440,259  1,439,628

Total commercial real estate loans $ 5,452,781  $ 5,566,044  $ 5,569,759

First Busey Corporation (BUSE) | 2026 Q2 — 8

Asset Quality

Asset quality continues to be strong. Busey maintains a well-diversified loan portfolio and, as a matter of policy and practice, limits concentration exposure in any particular loan segment.

As of

(dollars in thousands) June 30,

2026 March 31,

2026 June 30,

2025

Total assets $ 18,191,867  $ 18,036,622  $ 18,918,740

Portfolio loans 13,195,154  13,459,890  13,808,619

Loans 30 – 89 days past due 8,135  17,465  42,188

Non-performing loans:

Non-accrual loans 62,766  45,799  53,614

Loans 90+ days past due and still accruing 4,668  812  941

Non-performing loans 67,434  46,611  54,555

Other non-performing assets 2,871  3,337  3,596

Non-performing assets 70,305  49,948  58,151

Substandard (excludes 90+ days past due) 155,737  166,467  117,580

Classified assets $ 226,042  $ 216,415  $ 175,731

Allowance for credit losses $ 164,204  $ 169,054  $ 183,334

RATIOS

Non-performing loans to portfolio loans 0.51  % 0.35  % 0.40  %

Non-performing assets to total assets 0.39  % 0.28  % 0.31  %

Non-performing assets to portfolio loans and other non-performing assets 0.53  % 0.37  % 0.42  %

Allowance for credit losses to portfolio loans 1.24  % 1.26  % 1.33  %

Coverage ratio of the allowance for credit losses to non-performing loans 2.44 x 3.63 x 3.36 x

Classified assets to Bank Tier 1 capital(i) and reserves

9.69  % 9.35  % 7.70  %

___________________________________________

(i)Capital amounts for the second quarter of 2026 are not yet finalized and are subject to change.

Non-performing assets increased by $20.4 million compared to March 31, 2026, and increased by $12.2 million compared to June 30, 2025. The quarter-over-quarter increase was driven by one commercial credit where a partial charge-off was taken and a specific reserve was allocated; the sponsor remains engaged and is working towards a resolution. Non-performing assets represented 0.39% of total assets as of June 30, 2026, an 11 basis point increase from March 31, 2026, and an 8 basis point increase from June 30, 2025.

Classified assets increased by $9.6 million compared to March 31, 2026, and increased by $50.3 million compared to June 30, 2025.

The allowance for credit losses was $164.2 million as of June 30, 2026, equal to 2.4 times the balance of non-performing loans and representing 1.24% of total portfolio loans.

First Busey Corporation (BUSE) | 2026 Q2 — 9

Busey’s net charge-offs and provision for credit losses were as follows:

NET CHARGE-OFFS (RECOVERIES) AND PROVISION EXPENSE (RELEASE) (unaudited)

Three Months Ended Six Months Ended

(dollars in thousands)

June 30,

2026

March 31,

2026

June 30,

2025

June 30,

2026

June 30,

2025(i)

Net charge-offs

$ 6,382  $ 7,362  $ 12,881  $ 13,744  $ 44,310

Provision for loan losses

$ 1,532  $ 2,393  $ 1,005  $ 3,925  $ 43,457

Provision for unfunded commitments

657  665  4,695  1,322  7,836

Provision for credit losses

$ 2,189  $ 3,058  $ 5,700  $ 5,247  $ 51,293

Net charge-off ratio(ii)

0.19  % 0.22  % 0.37  % 0.21  % 0.75  %

___________________________________________

(i)The six months ended June 30, 2025, included $42.4 million to establish an initial allowance for loan losses for loans purchased without credit deterioration (“non-PCD” loans) and $7.2 million to establish an initial allowance for unfunded commitments following the close of the CrossFirst acquisition in the first quarter of 2025 and adoption of a new CECL model in the second quarter of 2025.

(ii)Annualized measure.

Net charge-offs decreased by $1.0 million when compared to the first quarter of 2026, and decreased by $6.5 million when compared with the second quarter of 2025. Net charge-offs during the six months ended June 30, 2026, included $11.3 million related to PCD loans acquired in the CrossFirst acquisition, which were previously reserved for.

Deposits

Busey’s deposits were comprised of the following:

As of

(dollars in thousands) June 30,

2026 March 31,

2026 June 30,

2025

DEPOSITS

Noninterest-bearing deposits $ 3,496,319  $ 3,526,036  $ 3,590,363

Interest-bearing transaction deposits 3,315,200  3,129,186  3,216,601

Savings deposits and money market deposits 5,934,920  5,714,697  6,362,352

Time deposits 2,382,306  2,366,141  2,632,456

Total deposits $ 15,128,745  $ 14,736,060  $ 15,801,772

Busey’s loan to deposit ratio improved to 87.2% as of June 30, 2026, compared to 91.3% as of March 31, 2026. Core deposits2 accounted for 93.7% of total deposits as of June 30, 2026. The quality of our core deposit franchise is a critical value driver of our institution. In addition to the $3.50 billion of noninterest-bearing deposits, we also have $1.91 billion of interest-bearing non-maturity deposits that are priced at 1 basis point, providing stable, rate inelastic funding. Busey has ample on- and off-balance sheet liquidity to manage deposit fluctuations and the liquidity needs of our customers.

Borrowings

In June 2026, Busey completed the previously announced redemption of its trust preferred securities issued by First Busey Statutory Trust II.

Liquidity

As of June 30, 2026, Busey’s available sources of on- and off-balance sheet liquidity5 totaled $8.85 billion. Furthermore, Busey’s balance sheet liquidity profile continues to be aided by the cash flows expected from Busey’s relatively short-duration securities portfolio. Those cash flows were approximately $103.2 million in the second quarter of 2026. Cash flows from our securities portfolio are expected to be approximately $171.9 million for the remainder of 2026, with a current book yield of 3.04%.

First Busey Corporation (BUSE) | 2026 Q2 — 10

Capital Strength

The strength of our balance sheet is also reflected in our robust capital foundation. The following table presents Busey’s capital estimates3 and tangible equity position:

As of

(dollars in thousands, except per share amounts) June 30,

2026 March 31,

2026 June 30,

2025

Common equity Tier 1 capital to risk weighted assets(i)

12.53  % 12.31  % 12.22  %

Total capital to risk weighted assets(i)

16.10  % 15.87  % 15.75  %

Tangible common equity(ii)

$ 1,696,685  $ 1,722,305  $ 1,709,168

Tangible common equity to tangible assets(ii)

9.57  % 9.81  % 9.27  %

Tangible book value per common share(ii)

$ 20.40  $ 20.14  $ 19.18

___________________________________________

(i)Capital amounts and ratios as of June 30, 2026, are not yet finalized and are subject to change.

(ii)For a reconciliation of non-GAAP measures to the most directly comparable GAAP financial measures, see “Non-GAAP Financial Information.”

Dividends

Busey's strong capital levels, coupled with its earnings, have allowed it to provide a steady return to its stockholders through dividends. During the second quarter of 2026, Busey paid dividends of $0.26 per share on its outstanding shares of common stock. Busey also paid dividends of $20.00 per share on its outstanding shares of Series A Non-Cumulative Perpetual Preferred Stock and $0.515625 per share on its outstanding depositary shares, each representing a 1/40th interest in a share of Busey’s 8.25% Fixed-Rate Series B Non-Cumulative Perpetual Preferred Stock.

Share Repurchases

On May 20, 2026, Busey's board of directors approved an amendment to Busey’s previously adopted share repurchase program to increase the number of shares of Busey’s common stock available for repurchase by 4,000,000 shares. During the second quarter of 2026, under its stock repurchase plan, Busey purchased 2,340,000 shares of its common stock at a weighted average price of $26.98 per share for a total of $63.1 million (excluding excise taxes). As of June 30, 2026, Busey had 3,898,775 shares remaining available for repurchase under the plan.

SECOND QUARTER EARNINGS INVESTOR PRESENTATION

For additional information on Busey’s financial condition and operating results, please refer to our Q2 2026 Earnings Investor Presentation furnished via Form 8‑K on July 28, 2026, in connection with this earnings release.

CORPORATE PROFILE

As of June 30, 2026, First Busey Corporation (Nasdaq: BUSE) was an $18.19 billion financial holding company headquartered in Leawood, Kansas.

Busey Bank, a wholly-owned bank subsidiary of First Busey Corporation headquartered in Champaign, Illinois, had total assets of $18.15 billion as of June 30, 2026. Busey Bank currently has 80 banking centers, with 21 in central Illinois markets, 17 in suburban Chicago markets, 20 in the St. Louis Metropolitan Statistical Area, four in the Dallas-Fort Worth Metropolitan Statistical Area, three in the Kansas City Metropolitan Statistical Area, three in southwest Florida, three in Oklahoma, three in Colorado, three in Arizona, one in Indianapolis, Indiana, one in Wichita, Kansas, and one in Clayton, New Mexico. More information about Busey Bank can be found at busey.com.

Through Busey’s Wealth Management division, the Company provides a full range of asset management, investment, brokerage, fiduciary, philanthropic advisory, tax preparation, and farm management services to individuals, businesses, and foundations. Assets under care totaled $16.51 billion as of June 30, 2026. More information about Busey’s Wealth Management services can be found at busey.com/wealthmanagement.

First Busey Corporation (BUSE) | 2026 Q2 — 11

Busey Bank’s payment technology solutions specialize in the evolving financial technology needs of small and medium-sized businesses, highly regulated enterprise industries, and financial institutions. Busey provides comprehensive and innovative payment technology solutions, including online, mobile, and voice-recognition bill payments; money and data movement; merchant services; direct debit services; lockbox remittance processing for payments made by mail; and walk-in payments at retail agents. Additionally, Busey simplifies client workflows through integrations enabling support with billing, reconciliation, bill reminders, and treasury services.

Busey is honored to be consistently recognized as an outstanding financial services organization with an engaged culture of integrity and commitment to community development. Nationally, American Banker has named Busey a Best Bank to Work For since 2016 while Pensions and Investments has recognized Busey as a Best Place to Work in Money Management since 2018. At the local level, Busey is continually honored among the Best Places to Work in Illinois (since 2016), Best Companies to Work For in Florida (since 2017) and Best Places to Work in Indiana (since 2024).

NON-GAAP FINANCIAL INFORMATION

This earnings release contains certain financial information determined by methods other than GAAP. Management uses these non-GAAP measures, together with the related GAAP measures, in analysis of Busey’s performance and in making business decisions, as well as for comparison to Busey’s peers. Busey believes the adjusted measures are useful for investors and management to understand the effects of certain non-core and non-recurring items and provide additional perspective on Busey’s performance over time.

The following tables present reconciliations between these non-GAAP measures and what management believes to be the most directly comparable GAAP financial measures.

These non-GAAP disclosures have inherent limitations and are not audited. They should not be considered in isolation or as a substitute for operating results reported in accordance with GAAP, nor are they necessarily comparable to non-GAAP performance measures that may be presented by other companies. Tax-effected numbers included in these non-GAAP disclosures are based on estimated statutory rates, estimated federal income tax rates, or effective tax rates, as noted in the tables below.

First Busey Corporation (BUSE) | 2026 Q2 — 12

RECONCILIATION OF NON-GAAP FINANCIAL MEASURES (Unaudited)

Calculation of Adjusted Net Income and Adjusted Diluted Earnings Per Common Share

Three Months Ended Six Months Ended

(dollars in thousands, except per share amounts) June 30,

2026 March 31,

2026 June 30,

2025 June 30,

2026 June 30,

2025

Net income (GAAP) [a] $ 63,176  $ 49,981  $ 47,404  $ 113,157  $ 17,414

Day 2 provision for credit losses(i)

—  —  —  —  45,572

Adjustment of initial provision for unfunded commitments due to adoption of new model(ii)

—  —  4,030  —  4,030

Other acquisition expenses 1,196  5,244  16,600  6,440  42,626

Restructuring expenses 1,930  11,456  —  13,386  —

Net securities (gains) losses (2,445) 940  (5,997) (1,505) 9,771

Related tax benefit(iii)

(170) (4,410) (4,971) (4,580) (27,040)

Non-recurring deferred tax adjustment(iv)

—  —  328  —  4,919

Adjusted net income (Non-GAAP)

[b] 63,687  63,211  57,394  126,898  97,292

Preferred dividends [c] 4,590  4,589  155  9,179  155

Adjusted net income available to common stockholders (Non-GAAP)

[d] $ 59,097  $ 58,622  $ 57,239  $ 117,719  $ 97,137

Weighted average number of common shares outstanding, diluted (GAAP) [e] 85,385,382  87,831,295  90,883,711  86,602,278  80,251,577

Diluted earnings per common share (GAAP) [(a-c)÷e] $ 0.69  $ 0.52  $ 0.52  $ 1.20  $ 0.22

Adjusted diluted earnings per common share (Non-GAAP)

[d÷e] $ 0.69  $ 0.67  $ 0.63  $ 1.36  $ 1.21

___________________________________________

(i)The Day 2 provision represents the initial provision for credit losses recorded in connection with the CrossFirst acquisition to establish an allowance on non-PCD loans and unfunded commitments and is reflected within the provision for credit losses line on the Statements of Income.

(ii)In the second quarter of 2025, Busey recorded an adjustment to the initial provision for unfunded commitments for CrossFirst acquisition-date balances based on revised estimates resulting from implementation of a new CECL model.

(iii)Tax benefits were calculated using tax rates of 25.0% and 26.5% for the six months ended June 30, 2026 and 2025, respectively. Tax benefits for quarterly periods were calculated as the year-to-date tax amounts less the tax reported for previous quarters during the year.

(iv)A deferred tax valuation adjustment was recorded in the first quarter of 2025 in connection with the CrossFirst acquisition and the expansion of Busey’s footprint into new states. Additionally, 2025 included a write-off of deferred tax assets related to non-deductible compensation and acquisition-related expenses. Deferred tax adjustments are reflected within the income taxes line on the Statements of Income.

First Busey Corporation (BUSE) | 2026 Q2 — 13

RECONCILIATION OF NON-GAAP FINANCIAL MEASURES (Unaudited)

Calculation of Return On Average Assets, Return On Average Tangible Common Equity, and Related Adjusted Return Measures

Three Months Ended Six Months Ended

(dollars in thousands) June 30,

2026 March 31,

2026 June 30,

2025 June 30,

2026 June 30,

2025

Net income (GAAP)

[a] $ 63,176  $ 49,981  $ 47,404  $ 113,157  $ 17,414

Amortization of intangible assets

4,232  4,291  4,592  8,523  7,675

Tax effect of amortization of intangible assets(i)

(1,058) (1,073) (1,256) (2,131) (2,035)

Preferred dividends

(4,590) (4,589) (155) (9,179) (155)

Tangible net income available to common stockholders (Non-GAAP)

[b] $ 61,760  $ 48,610  $ 50,585  $ 110,370  $ 22,899

Adjusted net income (Non-GAAP)(ii)

[c] $ 63,687  $ 63,211  $ 57,394  $ 126,898  $ 97,292

Amortization of intangible assets

4,232  4,291  4,592  8,523  7,675

Tax effect of amortization of intangible assets(i)

(1,058) (1,073) (1,256) (2,131) (2,035)

Preferred dividends

(4,590) (4,589) (155) (9,179) (155)

Adjusted tangible net income available to common stockholders (Non-GAAP)

[d] $ 62,271  $ 61,840  $ 60,575  $ 124,111  $ 102,777

Average total assets

[e] $ 17,887,097  $ 18,060,220  $ 19,068,086  $ 17,973,180  $ 16,961,396

Return on average assets (Non-GAAP)(iii)

[a÷e] 1.42  % 1.12  % 1.00  % 1.27  % 0.21  %

Adjusted return on average assets (Non-GAAP)(iii)

[c÷e] 1.43  % 1.42  % 1.21  % 1.42  % 1.16  %

Average common equity

$ 2,183,290  $ 2,255,075  $ 2,180,963  $ 2,218,984  $ 2,057,372

Average goodwill and other intangible assets, net

(474,043) (478,885) (494,473) (476,450) (452,978)

Average tangible common equity (Non-GAAP)

[f] $ 1,709,247  $ 1,776,190  $ 1,686,490  $ 1,742,534  $ 1,604,394

Return on average tangible common equity (Non-GAAP)(iii, iv)

[b÷f] 14.49  % 11.10  % 12.03  % 12.77  % 2.88  %

Adjusted return on average tangible common equity (Non-GAAP)(iii, iv)

[d÷f] 14.61  % 14.12  % 14.41  % 14.36  % 12.92  %

___________________________________________

(i)Tax effects were calculated using income tax rates of 25.0% and 26.5% for the six months ended June 30, 2026 and 2025, respectively. Tax effects for quarterly periods were calculated as the year-to-date tax amounts less the tax reported for previous quarters during the year.

(ii)A reconciliation is provided in the previous table.

(iii)Annualized measure.

(iv)Beginning in 2026, Busey revised, for all periods presented, its calculation of return on average tangible common equity and adjusted return on average tangible common equity to eliminate the effects of intangible asset amortization from the numerator of both calculations.

First Busey Corporation (BUSE) | 2026 Q2 — 14

RECONCILIATION OF NON-GAAP FINANCIAL MEASURES (Unaudited)

Calculation of Net Interest Margin and Adjusted Net Interest Margin

Three Months Ended Six Months Ended

(dollars in thousands) June 30,

2026 March 31,

2026 June 30,

2025 June 30,

2026 June 30,

2025

Net interest income (GAAP) $ 152,402  $ 153,969  $ 153,183  $ 306,371  $ 256,914

Tax-equivalent adjustment(i)

841  877  791  1,718  1,328

Tax-equivalent net interest income (Non-GAAP) [a] 153,243  154,846  153,974  308,089  258,242

Purchase accounting accretion related to business combinations (4,150) (5,394) (7,119) (9,544) (9,847)

Adjusted net interest income (Non-GAAP) [b] $ 149,093  $ 149,452  $ 146,855  $ 298,545  $ 248,395

Average interest-earning assets (Non-GAAP) [c] $ 16,508,372  $ 16,665,766  $ 17,700,356  $ 16,586,634  $ 15,543,955

Net interest margin (Non-GAAP)(ii)

[a÷c] 3.72  % 3.77  % 3.49  % 3.75  % 3.35  %

Adjusted net interest margin (Non-GAAP)(ii)

[b÷c] 3.62  % 3.64  % 3.33  % 3.63  % 3.22  %

___________________________________________

(i)Tax-equivalent adjustments were calculated using an estimated federal income tax rate of 21%, applied to non-taxable interest income on investments and loans.

(ii)Annualized measure.

Calculation of Pre-Provision Net Revenue and Related Measures

Three Months Ended Six Months Ended

(dollars in thousands) June 30,

2026 March 31,

2026 June 30,

2025 June 30,

2026 June 30,

2025

Net interest income (GAAP)

$ 152,402  $ 153,969  $ 153,183  $ 306,371  $ 256,914

Total noninterest income (GAAP)

44,311  42,265  44,863  86,576  66,086

Net security (gains) losses (GAAP)

(2,445) 940  (5,997) (1,505) 9,771

Total noninterest expense (GAAP)

(112,635) (129,519) (127,833) (242,154) (239,863)

Pre-provision net revenue (Non-GAAP)

[a] 81,633  67,655  64,216  149,288  92,908

Acquisition and restructuring (income) expenses, excluding initial provision expenses

3,126  16,700  16,600  19,826  42,626

Adjusted pre-provision net revenue (Non-GAAP)

[b] $ 84,759  $ 84,355  $ 80,816  $ 169,114  $ 135,534

Average total assets [c] $ 17,887,097  $ 18,060,220  $ 19,068,086  $ 17,973,180  $ 16,961,396

Pre-provision net revenue to average total assets (Non-GAAP)(i)

[a÷c] 1.83  % 1.52  % 1.35  % 1.67  % 1.10  %

Adjusted pre-provision net revenue to average total assets (Non-GAAP)(i)

[b÷c] 1.90  % 1.89  % 1.70  % 1.90  % 1.61  %

___________________________________________

(i)Annualized measure.

First Busey Corporation (BUSE) | 2026 Q2 — 15

RECONCILIATION OF NON-GAAP FINANCIAL MEASURES (Unaudited)

Calculation of Efficiency Ratio

Three Months Ended Six Months Ended

(dollars in thousands) June 30,

2026 March 31,

2026 June 30,

2025 June 30,

2026 June 30,

2025

Net interest income (GAAP) [a] $ 152,402  $ 153,969  $ 153,183  $ 306,371  $ 256,914

Tax-equivalent adjustment(i)

841  877  791  1,718  1,328

Tax-equivalent net interest income (Non-GAAP) [b] 153,243  154,846  153,974  308,089  258,242

Total noninterest income (GAAP) 44,311  42,265  44,863  86,576  66,086

Net security (gains) losses (2,445) 940  (5,997) (1,505) 9,771

Adjusted noninterest income (Non-GAAP) [c] $ 41,866  $ 43,205  $ 38,866  $ 85,071  $ 75,857

Operating revenue (Non-GAAP) [d = a+c] $ 194,268  $ 197,174  $ 192,049  $ 391,442  $ 332,771

Tax-equivalent operating revenue (Non-GAAP)(ii)

[e = b+c] 195,109  198,051  192,840  393,160  334,099

Adjusted noninterest income to operating revenue (Non-GAAP) [c÷d] 21.55  % 21.91  % 20.24  % 21.73  % 22.80  %

Total noninterest expense (GAAP)

$ 112,635  $ 129,519  $ 127,833  $ 242,154  $ 239,863

Acquisition and restructuring expenses, excluding initial provision expenses

(3,126) (16,700) (16,600) (19,826) (42,626)

Adjusted noninterest expense (Non-GAAP)(iii)

109,509  112,819  111,233  222,328  197,237

Amortization of intangible assets

(4,232) (4,291) (4,592) (8,523) (7,675)

Adjusted noninterest expense excluding amortization of intangible assets (Non-GAAP)(iv)

[f] $ 105,277  $ 108,528  $ 106,641  $ 213,805  $ 189,562

Efficiency ratio (Non-GAAP)(v)

[f÷e] 53.96  % 54.80  % 55.30  % 54.38  % 56.74  %

___________________________________________

(i)Tax-equivalent adjustments were calculated using an estimated federal income tax rate of 21%, applied to non-taxable interest income on investments and loans.

(ii)Beginning in 2026, Busey changed the caption for this revenue measure, which was previously called “adjusted tax-equivalent revenue.” The calculation itself has not changed.

(iii)Beginning in 2026, to better align with industry standards, Busey revised its calculation of adjusted noninterest expense, for all periods presented, to exclude any adjustment for amortization of intangible assets.

(iv)Beginning in 2026, Busey changed the caption for the efficiency ratio numerator from “adjusted noninterest expense” to “adjusted noninterest expense excluding amortization of intangible assets.” The calculation itself has not changed.

(v)Beginning in 2026, Busey now reports a single efficiency ratio, which was previously reported as the “adjusted efficiency ratio.”

First Busey Corporation (BUSE) | 2026 Q2 — 16

RECONCILIATION OF NON-GAAP FINANCIAL MEASURES (Unaudited)

Calculation of Tangible Common Equity, and Related Measures and Ratio

As of

(dollars in thousands, except per share amounts) June 30,

2026 March 31,

2026 June 30,

2025

Total assets (GAAP) $ 18,191,867  $ 18,036,622  $ 18,918,740

Goodwill and other intangible assets, net (471,288) (475,520) (488,181)

Tangible assets (Non-GAAP)(i)

[a] $ 17,720,579  $ 17,561,102  $ 18,430,559

Total stockholders’ equity (GAAP) $ 2,383,170  $ 2,413,022  $ 2,412,546

Preferred stock and additional paid in capital on preferred stock

(215,197) (215,197) (215,197)

Common equity [b] 2,167,973  2,197,825  2,197,349

Goodwill and other intangible assets, net (471,288) (475,520) (488,181)

Tangible common equity (Non-GAAP)

[c] $ 1,696,685  $ 1,722,305  $ 1,709,168

Tangible common equity to tangible assets (Non-GAAP)

[c÷a] 9.57  % 9.81  % 9.27  %

Ending number of common shares outstanding (GAAP) [d] 83,189,501  85,507,160  89,104,678

Book value per common share (Non-GAAP) [b÷d] $ 26.06  $ 25.70  $ 24.66

Tangible book value per common share (Non-GAAP) [c÷d] $ 20.40  $ 20.14  $ 19.18

Calculation of Core Deposits and Related Ratio

As of

(dollars in thousands) June 30,

2026 March 31,

2026 June 30,

2025

Total deposits (GAAP) [a] $ 15,128,745  $ 14,736,060  $ 15,801,772

Brokered deposits, excluding brokered time deposits of $250,000 or more (60,043) (60,123) (353,614)

Time deposits of $250,000 or more (896,354) (865,493) (827,762)

Core deposits (Non-GAAP) [b] $ 14,172,348  $ 13,810,444  $ 14,620,396

Core deposits to total deposits (Non-GAAP) [b÷a] 93.68  % 93.72  % 92.52  %

First Busey Corporation (BUSE) | 2026 Q2 — 17

FORWARD-LOOKING STATEMENTS

This press release may contain “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, with respect to Busey’s financial condition, results of operations, plans, objectives, future performance, and business. Forward-looking statements, which may be based upon beliefs, expectations and assumptions of Busey’s management and on information currently available to management, are generally identifiable by the use of words such as “believe,” “expect,” “anticipate,” “plan,” “intend,” “estimate,” “may,” “will,” “would,” “could,” “should,” “position,” or other similar expressions. Additionally, all statements in this document, including forward-looking statements, speak only as of the date they are made, and Busey undertakes no obligation to update any statement in light of new information or future events.

A number of factors, many of which are beyond Busey’s ability to control or predict, could cause actual results to differ materially from those in any forward-looking statements. These factors include, among others, the following: (1) the strength of the local, state, national, and international economies and financial markets (including effects of inflationary pressures, the threat or implementation of tariffs, trade wars, and changes to immigration policy); (2) changes in, and the interpretation and prioritization of, local, state, and federal laws, regulations, and governmental policies (including those concerning Busey's general business); (3) the economic impact of any future terrorist threats or attacks, widespread disease or pandemics, military conflicts, acts of war or threats thereof, or other adverse external events that could increase levels of political and economic unpredictability, contribute to rising energy and commodity prices, affect global supply chains, increase the volatility of financial markets, and other matters beyond our control (including the conflicts in the Middle East and Russia’s invasion of Ukraine); (4) unexpected results of acquisitions, including the acquisition of CrossFirst, which may include the failure to realize the anticipated benefits of the acquisitions and the possibility that the transaction and integration costs may be greater than anticipated; (5) the imposition of tariffs or other governmental policies impacting the value of products produced by Busey's commercial borrowers; (6) the impact of bank failures or adverse developments at other banks and related negative publicity about the banking industry, including investor and depositor sentiment regarding bank stability and liquidity; (7) new or revised accounting policies and practices as may be adopted by state and federal regulatory banking agencies, the Financial Accounting Standards Board, the Securities and Exchange Commission, or the Public Company Accounting Oversight Board; (8) changes in interest rates and prepayment rates of Busey’s assets (including the impact of sustained elevated interest rates); (9) increased competition in the financial services sector (including from non-bank competitors such as credit unions, digital asset service providers, private credit, and fintech companies) and the inability to attract new customers; (10) technological changes implemented by us and other parties, including our third-party vendors, which may have unforeseen consequences to us and our customers, including the development and implementation of tools incorporating artificial intelligence; (11) the loss of key executives or associates, talent shortages, and employee turnover; (12) unexpected outcomes and costs of existing or new litigation, investigations, or other legal proceedings, inquiries, and regulatory actions involving Busey (including with respect to Busey’s Illinois franchise taxes); (13) fluctuations in the value of securities held in Busey’s securities portfolio, including as a result of changes in interest rates; (14) credit risk and risk from concentrations (by type of borrower, geographic area, collateral, and industry), within Busey's loan portfolio and large loans to certain borrowers (including commercial real estate loans); (15) the concentration of large deposits from certain clients who have balances above current Federal Deposit Insurance Corporation insurance limits and may withdraw deposits to diversify their exposure; (16) the level of non-performing assets on Busey’s balance sheets; (17) interruptions involving information technology and communications systems or third-party servicers; (18) breaches or failures of information security controls or cybersecurity-related incidents; (19) the availability of future equity and debt issuances and other capital raising opportunities on favorable terms; (20) the economic impact on Busey and its customers of climate change, natural disasters, and exceptional weather occurrences such as tornadoes, hurricanes, floods, blizzards, and droughts; (21) the ability to successfully manage liquidity risk, which may increase dependence on non-core funding sources such as brokered deposits, and may negatively impact Busey's cost of funds; (22) the ability to maintain an adequate level of allowance for credit losses on loans; (23) the effectiveness of Busey’s risk management framework; and (24) the ability of Busey to manage the risks associated with the foregoing. These risks and uncertainties should be considered in evaluating forward-looking statements and undue reliance should not be placed on such statements.

Additional information concerning Busey and its business, including additional factors that could materially affect Busey’s financial results, is included in Busey’s filings with the Securities and Exchange Commission.

First Busey Corporation (BUSE) | 2026 Q2 — 18

END NOTES

1 Annualized measure.

2

Represents a non-GAAP financial measure. For a reconciliation to the most directly comparable financial measure calculated and presented in accordance with Generally Accepted Accounting Principles (“GAAP”), see "Non-GAAP Financial Information.”

3 Capital amounts and ratios as of June 30, 2026, are not yet finalized and are subject to change.

4 The blended benchmark consists of 60% MSCI All Country World Index and 40% Bloomberg Intermediate US Government/Credit Total Return Index.

5 On- and off-balance sheet liquidity is comprised of cash and cash equivalents, debt securities excluding those pledged as collateral, brokered deposits, and Busey’s borrowing capacity through its revolving credit facility, the FHLB, the Federal Reserve Bank, and federal funds purchased lines.

First Busey Corporation (BUSE) | 2026 Q2 — 19

FIRST BUSEY CORPORATION

11440 Tomahawk Creek Parkway, Leawood, KS 66211

NASDAQ: BUSE

Busey 2026 | All Rights Reserved

100 West University Avenue, Champaign, IL 61820

Member FDIC

busey.com

EX-99.2

EX-99.2

Filename: buse_20260728x26q2xex992.htm · Sequence: 3

buse_20260728x26q2xex992

Q2 2026 EARNINGS INVESTOR PRESENTATION July 28, 2026

22Q26 Earnings Investor Presentation First Busey Corporation | Ticker: BUSE This presentation may contain “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, with respect to First Busey Corporation’s (“Busey’s”) financial condition, results of operations, plans, objectives, future performance, and business. Forward-looking statements, which may be based upon beliefs, expectations and assumptions of Busey’s management and on information currently available to management, are generally identifiable by the use of words such as “believe,” “expect,” “anticipate,” “plan,” “intend,” “estimate,” “may,” “will,” “would,” “could,” “should,” “position,” or other similar expressions. Additionally, all statements in this document, including forward-looking statements, speak only as of the date they are made, and Busey undertakes no obligation to update any statement in light of new information or future events. A number of factors, many of which are beyond Busey’s ability to control or predict, could cause actual results to differ materially from those in any forward-looking statements. These factors include, among others, the following: (1) the strength of the local, state, national, and international economies and financial markets (including effects of inflationary pressures, the threat or implementation of tariffs, trade wars, and changes to immigration policy); (2) changes in, and the interpretation and prioritization of, local, state, and federal laws, regulations, and governmental policies (including those concerning Busey's general business); (3) the economic impact of any future terrorist threats or attacks, widespread disease or pandemics, military conflicts, acts of war or threats thereof, or other adverse external events that could increase levels of political and economic unpredictability, contribute to rising energy and commodity prices, affect global supply chains, increase the volatility of financial markets, and other matters beyond our control (including the conflicts in the Middle East and Russia’s invasion of Ukraine); (4) unexpected results of acquisitions, including the acquisition of CrossFirst, which may include the failure to realize the anticipated benefits of the acquisitions and the possibility that the transaction and integration costs may be greater than anticipated; (5)  the imposition of tariffs or other governmental policies impacting the value of products produced by Busey's commercial borrowers; (6) the impact of bank failures or adverse developments at other banks and related negative publicity about the banking industry, including investor and depositor sentiment regarding bank stability and liquidity; (7) new or revised accounting policies and practices as may be adopted by state and federal regulatory banking agencies, the Financial Accounting Standards Board, the Securities and Exchange Commission, or the Public Company Accounting Oversight Board; (8) changes in interest rates and prepayment rates of Busey’s assets (including the impact of sustained elevated interest rates); (9) increased competition in the financial services sector (including from non-bank competitors such as credit unions, digital asset service providers, private credit, and fintech companies) and the inability to attract new customers; (10)  technological changes implemented by us and other parties, including our third-party vendors, which may have unforeseen consequences to us and our customers, including the development and implementation of tools incorporating artificial intelligence; (11)  the loss of key executives or associates, talent shortages, and employee turnover; (12) unexpected outcomes and costs of existing or new litigation, investigations, or other legal proceedings, inquiries, and regulatory actions involving Busey (including with respect to Busey’s Illinois franchise taxes); (13) fluctuations in the value of securities held in Busey’s securities portfolio, including as a result of changes in interest rates; (14) credit risk and risk from concentrations (by type of borrower, geographic area, collateral, and industry), within Busey's loan portfolio and large loans to certain borrowers (including commercial real estate loans); (15)  the concentration of large deposits from certain clients who have balances above current Federal Deposit Insurance Corporation insurance limits and may withdraw deposits to diversify their exposure; (16) the level of non-performing assets on Busey’s balance sheets; (17) interruptions involving information technology and communications systems or third-party servicers; (18) breaches or failures of information security controls or cybersecurity-related incidents; (19) the availability of future equity and debt issuances and other capital raising opportunities on favorable terms; (20) the economic impact on Busey and its customers of climate change, natural disasters, and exceptional weather occurrences such as tornadoes, hurricanes, floods, blizzards, and droughts; (21) the ability to successfully manage liquidity risk, which may increase dependence on non-core funding sources such as brokered deposits, and may negatively impact Busey's cost of funds; (22) the ability to maintain an adequate level of allowance for credit losses on loans; (23) the effectiveness of Busey’s risk management framework; and (24) the ability of Busey to manage the risks associated with the foregoing. These risks and uncertainties should be considered in evaluating forward-looking statements and undue reliance should not be placed on such statements. Additional information concerning Busey and its business, including additional factors that could materially affect Busey’s financial results, is included in Busey’s filings with the Securities and Exchange Commission. Forward-Looking Statements

32Q26 Earnings Investor Presentation First Busey Corporation | Ticker: BUSE Table of Contents Overview of First Busey Corporation (BUSE) 4 2Q26 Review 5 Investment Highlights 6 Earnings Performance 7 Strategically Configured Regional Operating Model 8 High Quality Loan Portfolio 9 Pristine Credit Quality 10 Top Tier Core Deposit Franchise 11 Net Interest Margin 12 Diversified and Significant Sources of Noninterest Income 13 Wealth Management 14-15 Focused Control on Expenses 16 Robust Capital Foundation 17 Appendix: 18 Seasoned Leadership Team 19 Purchase Accounting Projections 20 Non-GAAP Financial Information 21

42Q26 Earnings Investor Presentation First Busey Corporation | Ticker: BUSE Overview of First Busey Corporation (NASDAQ: BUSE) Holding company of a 158+ year old bank Corporate headquarters in Leawood, KS $18.2 Billion Total Assets 1 $16.5 Billion Wealth Assets Under Care 1 $2.5 Billion Market Cap 1 1 Total Assets and Wealth Assets Under Care as of 6/30/26. Market cap as of 7/27/26 A full suite of solutions provided to our clients for every stage of their business and personal life

52Q26 Earnings Investor Presentation First Busey Corporation | Ticker: BUSE 1 Non-GAAP calculations, see Appendix 2Q26 Review Financial Results Metric 1Q26 2Q26 Adj. Diluted EPS 1 $0.67 $0.69 Adj. Net Income to Common S/H 1 $59 million $59 million Total Operating Revenue 1 $197 million $194 million Net Interest Margin 1 3.77% 3.72% Adj. Net Interest Margin 1 3.64% 3.62% Net Interest Income $154 million $152 million Adj. Noninterest Income 1 $43 million $42 million Adj. Pre-Provision Net Revenue 1 $84 million $85 million Adj. PPNR ROAA 1 1.89% 1.90% Adj. ROAA 1 1.42% 1.43% Adj. ROATCE 1 14.12% 14.61% Efficiency Ratio 1 54.8% 54.0% Total Assets $18.0 billion $18.2 billion Total Loans $13.5 billion $13.2 billion Total Deposits $14.7 billion $15.1 billion TBV / Share 1 $20.14 $20.40 ▪ Assets Under Care of $16.5 billion at 6/30/26, as net AUC inflows across our footprint augmented rising market impact ▪ 2Q26 Wealth segment revenue of $20 million, up 3.2% QoQ, and a third consecutive record quarter for wealth revenue Wealth management exhibits excellent performance ▪ TBV per share up $1.22/share, or 6%, YoY; TBV per share plus dividend up 12% ▪ Since embarking on share repurchase initiative in March 2025, repurchased ~9% of the total common shares that were outstanding at 3/31/25 and returned nearly $200 million to shareholders via buybacks Tangible Book Value grows year-over-year as Share Repurchase Plan remains active ▪ Loans declined by $265 million impacted by payoff headwinds; asset quality remains strong with NPAs / Assets of 0.39% and 19 bps of NCOs during 2Q26 ▪ Deposits increased by $393 million, or 2.7% QoQ, driven by seasonal public funds inflows and strategic efforts to grow core customer deposits Strong sequential deposit growth and expected loan decline as asset quality remains strong ▪ 1.43% adj. ROAA1, a 14.61% adj. ROATCE1, and 54.0% efficiency ratio1 in 2Q26, compared to 1.21% adj. ROAA1, 14.41% adj. ROATCE1, and 55.3% efficiency ratio1 in 2Q25 ▪ YoY EPS growth of 9.5%, with $0.69 adjusted EPS1 in 2Q26 compared to $0.63 in 2Q25 Near record company profitability $152.4 $41.9 -$109.5 -$2.2 -$18.7 -$0.2 -$4.6 $59.1 Net Interest Income Adj. Noninterest Income¹ Adj. Noninterest Expense¹ Provision for credit losses Income Taxes Reversal of tax benefit from non-operating costs Preferred Dividend Adj. Net Income to Common Shareholders¹ 2Q26 Summary Income Statement 22.85% Effective Tax Rate 1.24% Allowance/Loans $ in millions Common Shares Repurchased Average Price $ Return to Shareholders FY 2025 3.06 million $22.81 $69.9 million 1Q26 2.62 million $25.07 $65.6 million 2Q26 2.34 million $26.98 $63.1 million Total 8.02 million $24.76 $198.6 million Repurchase Plan Update -1.0% QoQ (-0.3% ex-PAA) -3.1% QoQ -2.9% QoQ

62Q26 Earnings Investor Presentation First Busey Corporation | Ticker: BUSE Attractive Profitability and Returns Disciplined Growth Strategy Driven by Regional Operating Model Balance Sheet Strength 1 Non-GAAP calculation, see Appendix | 2 2Q26 capital ratios are preliminary estimates | 3 Most recent quarter reported for KRX components as of 7/27/26 | 4 Market Data for BUSE updated to close on 7/27/26 5 Based on consensus median net income of covering analysts as of 7/27/26 Investment Highlights ▪ Achieving near company- record ROAA1 and Efficiency Ratio1 with initiatives undertaken over the last twelve months ▪ Organic growth powered by an approach that brings the full capabilities of commercial, wealth, and payments to each community through local leadership and autonomy $ in billions 2Q26 Metrics better than KRX median are bolded KRX Median MRQ 3 Total Assets $18.2 $30.2 Total Loans $13.2 $21.4 Total Deposits $15.1 $24.2 Total Wealth AUC $16.5 NM TCE Ratio1 9.6 % 8.8 % CET1 Ratio2 12.5 % 12.3 % NPA/Assets 0.39 % 0.47 % Net Interest Margin 1 3.72 % 3.67 % Adj. Nonint. Income % of Operating Revenue 1 21.6 % 17.9 % Adj. PPNR ROAA 1 1.90 % 1.84 % Adj. ROAA 1 1.43 % 1.41 % Adj. ROATCE 1 14.61 % 15.02 % Efficiency Ratio 1 54.0 % 53.7 % Market Cap 4 $2.5 $4.8 Dividend Yield 4 3.5% 2.7 % Price / TBV 4 1.5x 1.8x Price / 2026E 5 11.3x 11.9x Financial Highlights Core Deposits Asset Quality Robust Capital Efficient Profits Dividends Share Repurchases ▪ 93.7% core deposit1 base that is granular and low cost at 1.80% total cost of deposits in 2Q26 ▪ Robust capital foundation with capital ratios at a $820 million+ excess over well-capitalized minimums with capital buffer2 ▪ High quality, conservatively underwritten loan portfolio with low levels of concentration; strong reserve levels with allowance/loans at 1.24% ▪ Active share repurchase program: since March 2025, buybacks representing ~9% of outstanding common shares and returning almost $200 million to shareholders ▪ Quarterly common stock dividend of $0.26 (3.5% yield)4, with dividend payout ratio ranging from 37%-39% in the last twelve months ▪ Executed nine strategic acquisitions over the last eleven years to enhance franchise value without unduly diluting shareholders, including the TBV-accretive acquisition of $7.5 billion asset CrossFirst in March 2025 ▪ Wealth Management AUC of $16.5 billion at 6/30/26, up 17% YoY, supported by net new inflows including from new Western markets, as company posted its third consecutive quarter of record revenue

72Q26 Earnings Investor Presentation First Busey Corporation | Ticker: BUSE $13.60 $31.59 FY 2016 FY 2017 FY 2018 FY 2019 FY 2020 FY 2021 FY 2022 FY 2023 FY 2024 FY 2025 2026 Q2 $10 $20 $30 $57.2 $57.4 $60.6 $58.6 $59.1 $0.63 $0.64 $0.68 $0.67 $0.69 Adj. Net Income Avail. to Common S/H Adj. EPS 2025 Q2 2025 Q3 2025 Q4 2026 Q1 2026 Q2 14.4% 14.0% 14.3% 14.1% 14.6% 1.21% 1.33% 1.41% 1.42% 1.43% Adj. ROATCE Adj. ROAA 2025 Q2 2025 Q3 2025 Q4 2026 Q1 2026 Q2 1 Non-GAAP calculation, see Appendix | 2 Includes cumulative dividends per share over the period | 3 Market Data for BUSE updated to close on 7/27/26 Earnings Performance Adjusted Net Income & Earnings Per Common Share 1 Adjusted ROATCE & Adjusted ROAA 1 $ in millions $0.53 $0.69 2024 Q2 2024 Q3 2024 Q4 2025 Q1 2025 Q2 2025 Q3 2025 Q4 2026 Q1 2026 Q2 $0.50 $0.60 $0.70 Accelerating EPS Growth 1 +9% CAGR +$17.99 Current common stock dividend yield of 3.5%3 Tangible Common BV 1 / Share (ex-AOCI) + Dividends 2 +14% 2-Year CAGR

82Q26 Earnings Investor Presentation First Busey Corporation | Ticker: BUSE Strategically Configured Regional Operating Model Focused on bringing the full breadth of commercial, wealth, and payments to provide a broad set of financial solutions to well-capitalized individuals and the companies they own & operate Life Equity Lending Structured Finance Energy Banking SBA Lending $8B deposits $2B deposits $5B loans $13B AUC $3B AUC $3B loans $3B deposits $2B loans $1B deposits $1B loans $1B deposits $2B loans $1B loans Enterprise-wide sales structure is organized by region – bringing full capabilities and the complete Busey experience to each community through local leadership and autonomy Notes: Balances based on origination location; data as of 6/30/26

92Q26 Earnings Investor Presentation First Busey Corporation | Ticker: BUSE Commercial & Industrial 30% Owner- Occupied CRE 11%Non-Owner- Occupied CRE 30% Real Estate Construction 8% Residential Real Estate 16% Other 5% 1 Capital is Busey Bank Tier 1 Capital (preliminary estimates) + Allowance for credit losses | 2 Most recent quarter reported for KRX components as of 7/27/26 | 3 Based on loan origination 4 Includes $6.4 million of net charge-offs, which represent an immaterial percentage of other payoffs Classified Assets / Capital 1 NPLs / Total Loans 9.7% 0.51% KRX Mean MRQ 2 KRX Mean MRQ 2 15.6% 0.66% High Quality Loan Portfolio Loan Portfolio Regional Segmentation 3 Loan Portfolio Composition Total Loan Portfolio: $13.2 Billion Commercially-oriented portfolio is well-diversified by sector and geographic location and conservatively underwritten with low levels of concentration Portfolio 2026 Q1 QoQ ∆ 2026 Q2 % of Total East (Chicago, Southwest FL) $2,553 -$4 $2,549 19.3 % Midwest (Central IL, Indy, St. Louis) $4,618 -$21 $4,597 34.8 % Central (KC, Wichita, OKC, Tulsa) $1,965 -$69 $1,896 14.4 % Texas (Dallas, Fort Worth) $1,751 -$136 $1,615 12.2 % West (AZ, CO, NM) $1,053 +$19 $1,072 8.1 % Verticals $1,520 -$54 $1,466 11.1 % Total Loans $13,460 -$265 $13,195 100 % West region produced growth of 2% QoQ; driven by production from new hires and retained talent in Phoenix and Denver markets $ in millions 7.13% 7.06% 6.35% 6.49% 6.23% 6.22% 6.20% 6.10% 6.03% 5.97% 4.33% 4.35% 4.09% 3.68% 3.63% Net New Funding Yield Loan Yield SOFR 30D (Avg) 6/30/25 9/30/25 12/31/25 3/31/26 6/30/26 Loan Yield While maintaining focus on our guiding principles of pristine asset quality +$371 +$257 -$731 -$162 New Loan Production Net Line of Credit Draws Payoffs⁴ Amortization -$300 +$700 Commercial Loans / Total Portfolio 79% 100/300 Test 44% C&D / 222% CRE 2Q26 Loan Balances Change Life Equity Lending continued to provide strong loan production that partially offset declines in other verticals Disciplined loan pricing remains a key enterprise-wide priority Anticipated QoQ balance decline influenced by payoff headwinds that are expected to continue into 3Q26 $ in millions As of 6/30/26 Texas and Central region loan balances pressured by payoffs headwind during the quarter

102Q26 Earnings Investor Presentation First Busey Corporation | Ticker: BUSE ▪ Our conservative approach to credit risk management has resulted in a continued legacy of strong and stable credit quality ▪ Loans 90+ days past due and still accruing of $4.7 million at 6/30/26, or 0.04% of total loans, and loans 30-89 days past due represent 0.06% of total loans ▪ OREO and repossessed asset balances total $2.9 million at 6/30/26 ▪ 2Q26 net credit provision expense of $2.2 million ▪ Increase in NPAs is primarily related to one commercial credit; a partial charge-off was taken and a specific reserve was allocated on this credit during 2Q26 but sponsor remains engaged and working towards a resolution. 1 Average loans was calculated as the average of the ending portfolio loan balances over the most recent four quarters Pristine Credit Quality Nonperforming Assets / Total Assets Net Charge-Offs / Average Loans (Annualized) 1 0.06% 0.19% 0.32% 0.28% 0.39% 0.32% 0.47% 0.50% 0.51% Busey KRX Mean 2023 YE 2024 YE 2025 YE 2026 Q1 2026 Q2 $ in millions $ in millions BUSE NPAs $7.9 $23.3 $58.1 $49.9 $70.3 BUSE NCOs $12.9 $5.8 $5.8 $7.4 $6.4 0.37% 0.17% 0.17% 0.22% 0.19%0.19% 0.22% 0.22% 0.20% Busey KRX Mean 2025 Q2 2025 Q3 2025 Q4 2026 Q1 2026 Q2 ▪ Reserves + purchase accounting marks / loans = 1.82% ▪ Allowance to Nonperforming Loans coverage of 2.44x Allowance / Loans 1.20% 1.08% 1.28% 1.26% 1.24% 1.20% 1.24% 1.24% 1.23% Busey KRX Mean 2023 YE 2024 YE 2025 YE 2026 Q1 2026 Q2

112Q26 Earnings Investor Presentation First Busey Corporation | Ticker: BUSE $15,802 $15,070 $14,906 $14,736 $15,129 2.21% 2.15% 1.91% 1.81% 1.80% Total Deposits Total Cost of Deposits 2025 Q2 2025 Q3 2025 Q4 2026 Q1 2026 Q2 Midwest region, particularly Edwardsville market, impacted positively by seasonal public funds; more than offsetting retail tax outflows Noninterest- bearing 23.1% Interest-bearing 21.5% Savings & Money Market 39.3% Brokered 0.4% Time <250k 9.8% Time >250k 5.9% 1 Non-GAAP calculation, see Appendix Top Tier Core Deposit Franchise Deposit Portfolio Composition Total Deposits: $15.1 Billion Deposit Portfolio Regional Segmentation Portfolio 2026 Q1 QoQ ∆ 2026 Q2 % of Total East (Chicago, Southwest FL)2 $2,410 -$32 $2,378 15.7 % Midwest (Central IL, Indy, St. Louis)2 $7,698 +$143 $7,841 51.8 % Central (KC, Wichita, OKC, Tulsa) $2,965 +$350 $3,315 21.9 % Texas (Dallas, Fort Worth) $698 -$27 $671 4.4 % West (AZ, CO, NM) $803 -$8 $795 5.3 % Verticals $162 -$33 $129 0.9 % Total Deposits $14,736 +$393 $15,129 100 % $ in millions 55% deposit beta since 2Q25 June 2025: Merged CrossFirst Bank into Busey Bank As of 6/30/26 ▪ Deposit inflows allowed for reduction of borrowings by $185 million QoQ, and spot total cost of funds was 1.92% at 6/30/26, compared to 1.90% at 3/31/26 3Q26 4Q26 FY 2027 Balances ($ millions) $962 $767 $629 Weighted Average Rate 3.5 % 3.5 % 3.3 % CD Maturity Schedule as of 6/30/26 Central was the beneficiary of targeted initiatives to bring more deposits on-balance sheet Retail 52% Commercial 41% Public 7% Brokered 0% Average Customer Tenure Retail 11.1 years Commercial 17.0 years Public 20.7 years ▪ New CD production in 2Q26 had a weighted-average term of 6.9 months and a weighted-average rate of 3.6% $189 million Average Deposits per Branch Low Cost, Granular Deposit Base with an Efficient Branch Footprint 87.2% Loan to Deposit Ratio 93.7% Core Deposits1 1.80% MRQ Average Cost of Deposits 36% % of Total Deposits priced at 1 bp or less Deposit Portfolio Trend $ in millions

122Q26 Earnings Investor Presentation First Busey Corporation | Ticker: BUSE $153.2 $155.1 $157.6 $154.0 $152.4 $146.1 $149.2 $152.4 $148.6 $148.2 $7.1 $5.9 $5.2 $5.4 $4.2 Net Interest Income ex-PAA Purchase Accounting Accretion 2025 Q2 2025 Q3 2025 Q4 2026 Q1 2026 Q2 5.63% 5.63% 5.53% 5.51% 5.47% 2.29% 2.22% 1.97% 1.89% 1.89% 3.49% 3.58% 3.71% 3.77% 3.72% Earning Assets Cost of Funds NIM 2025 Q2 2025 Q3 2025 Q4 2026 Q1 2026 Q2 1 Tax-equivalent adjusted amounts; Non-GAAP, see Appendix 2 Based on a static balance sheet that is projected over one- and two-year time horizons, with net interest income calculated under current market rates assuming permanent instantaneous shifts $ in millions Net Interest Margin Trend 1Net Interest Income Trend Net Interest Margin Note: Company Purchase Accounting Schedule in appendix Avg IE Assets ($B) $17.70 $17.27 $16.94 $16.67 $16.51 2H26 2027 2028 Roll-off Cash Flow ($ millions) $172 $299 $317 Approximate Roll-off Yield 3.0 % 3.1 % 3.1 % 2H26 2027 2028 Balances ($ millions) $570 $993 $690 Weighted Average Rate 4.7 % 4.9 % 5.4 % Scheduled Maturities / Repricing of Fixed Rate Loans Roll-off of Securities Continue to benefit from the substantial amount of low-yield loans and securities rolling off into higher-yield products 2Q26 Net New Loan Funding Yield: 6.23% New Securities purchased at: ~5.00% Net Interest Income Rate Sensitivity 2 Rate Shock Year 1 NII Impact Year 2 NII Impact +200  bps +3.1 % +3.7 % +100  bps +1.8 % +2.2 % -100  bps -1.0 % -2.2 % -200  bps -0.7 % -3.3 % Balance sheet remains well-positioned for rate neutrality Reported Ex-PAA Net Interest Income -$1.6 million -1.0% -$0.4 million -0.3% Net Interest Margin -5 bps -2 bps ▪ Purchase Accounting Accretion contribution to NII declined by $1.2 million QoQ due to higher than expected payoffs of premium marked loans ▪ Ex-PAA net interest income and NIM were relatively stable, down -0.3%, and 2 bps, respectively QoQ Change in NII and NIM 2.92% 3.08% 3.33% 3.45% 3.59% 3.64% 3.62% 2024 Q4 2025 Q1 2025 Q2 2025 Q3 2025 Q4 2026 Q1 2026 Q2 Ex-PAA NIM Trend

132Q26 Earnings Investor Presentation First Busey Corporation | Ticker: BUSE Payment Technology Solutions includes lockbox/ACH payment processing, merchant services, online payments, and other electronic payments Treasury Management Services includes commercial cash management services, wires, and other commercial business service charges 1 2Q26 adjusted noninterest income contributed 21.6% of total operating revenue (excludes net securities gains) 278.9% of 2Q26 adjusted noninterest income is contributed by wealth management fees, wealth management referral income included in other noninterest income, payment technology solutions revenue, revenue lines managed by treasury management division (treasury management services revenue and corporate credit card interchange), and capital markets 3 Non-GAAP calculation, see Appendix | 4 Approximately $0.2 million of Other Noninterest Income was attributable to the wealth segment in 2Q25 and 2Q26 $192.0 $196.7 $200.9 $197.2 $194.3 $38.9 $41.5 $43.4 $43.2 $41.9 $153.2 $155.1 $157.6 $154.0 $152.4 20.2% 21.1% 21.6% 21.9% 21.6% Adj. Nonint. Inc. Net Interest Income Adj. Nonint. Inc./Op. Rev. 2025 Q2 2025 Q3 2025 Q4 2026 Q1 2026 Q2 $ in millions Noninterest Income Detail 2025 Q2 YoY Change 2026 Q2 % of Total (Adj.) Wealth Management Fees $16,777 +19 % $19,981 47.7 % Payment Technology Solutions 4,956 0 % 4,968 11.9 % Treasury Management Services 4,569 +5 % 4,789 11.4 % Capital Markets 1,254 +49 % 1,871 4.5 % Card Services and ATM Fees 4,880 -1 % 4,813 11.5 % Other Service Charges on Deposit Accounts 1,513 -7 % 1,407 3.4 % Income on Bank Owned Life Insurance 1,745 -6 % 1,637 3.9 % Other Noninterest Income4 3,172 -24 % 2,400 5.7 % Adjusted Noninterest Income $38,866 +8 % $41,866 100 % Net Securities Gains (Losses) 5,997 2,445 Total Noninterest Income $44,863 -1 % $44,311 $ in thousands Adjusted Noninterest Income / Operating Revenue 3 Sources of Noninterest Income Diversified and Significant Sources of Noninterest Income Other noninterest income also decreased QoQ, due primarily to declines in other asset valuations that typically will fluctuate as well as seasonality of SBA loan gain on sales, which tends to peak in 1Q 21.6% 78.9% Wealth + Payments/Treasury Management + Capital Markets As a percentage of Total Noninterest Income 2 2Q26 Card Services line item includes $1.2 million of interchange fees from corporate credit cards that are managed by Treasury Management team Adjusted Noninterest Income As a percentage of Total Revenue 1 Capital markets team built out in 2H25 and includes directors of derivatives, syndications, and international banking

142Q26 Earnings Investor Presentation First Busey Corporation | Ticker: BUSE $17.0 $17.4 $18.3 $19.5 $20.1 $7.7 $7.5 $8.5 $9.4 $9.9 45.1% 43.0% 46.6% 48.2% 49.0% Revenue Pre-Tax Income ² Pre-Tax Profit Margin ² 2025 Q2 2025 Q3 2025 Q4 2026 Q1 2026 Q2 $14,102 $14,959 $15,657 $15,647 $16,506 2025 Q2 2025 Q3 2025 Q4 2026 Q1 2026 Q2 ▪ Strong growth in Assets Under Care (AUC) as net inflows were augmented by market growth during 2Q26 1 Wealth Management segment | 2 1Q26 wealth management pre-tax income is adjusted to exclude non-operating expenses $ in millions $ in millions Wealth Management Wealth Revenue Composition 1 % of Total WM Revenue 2025 Q2 2025 Q3 2025 Q4 2026 Q1 2026 Q2 Trust / Agency 82.9 % 86.2 % 86.3 % 83.6 % 82.6 % Brokerage 7.6 % 8.0 % 8.2 % 7.7 % 7.4 % Ag Services 2.4 % 0.6 % 1.6 % 6.7 % 3.0 % Tax & Financial Planning 4.1 % 0.6 % 0.5 % 0.5 % 4.0 % Estate Settlement 1.8 % 3.4 % 2.2 % 0.5 % 2.0 % Other 1.2 % 1.1 % 1.1 % 1.0 % 1.0 % Total 100 % 100 % 100 % 100 % 100 % $16.5 Billion Assets Under Care LTM Revenue 1$75.3 Million ▪ 2Q26 Wealth revenue1 of $20.1 million, a YoY increase of 19% and a third consecutive quarter of record quarterly revenue at the company ▪ Pre-tax profit margin2 of 49.0% in 2Q26 and 46.8% over the last twelve months Wealth Revenue 1 and Pre-Tax Income 2Assets Under Care Integrated comprehensive capabilities to serve Personal & Institutional Clients ▪ Sustained momentum in net new inflows has contributed to YoY AUC growth ▪ New wealth teams established in Kansas City, Wichita, Oklahoma City, Dallas, Denver, and Phoenix over the last twelve months ▪ AUC in these new Western markets has grown to $160 million as of 6/30/26, with robust AUC in pipelines LTM PT Margin 246.8% Tax & Financial Planning contributed $0.8 million of revenue during the quarter, the typical seasonal 2Q peak for that category, while Ag Services normalized from its typical annual 1Q high AUC is up $2.4 billion YoY, or 17%

152Q26 Earnings Investor Presentation First Busey Corporation | Ticker: BUSE Wealth Management Comprehensive and Integrated Core Capabilities to Serve Personal and Institutional Clients Firm continuity may depend heavily on the investment expertise of a few key professionals Variety of solutions likely to be limited due to resource constraints Proactive client engagement with a tailored, client- focused approach Flat nature of organization allows for access to decision-makers Client accessibility to team can be limited due to large spread of client base Service can become standardized as focus shifts to scalability & driving growth Access to varied solutions providing optionality for specific client needs Comprehensive wealth platform covering all primary services Enterprise-wide team collaborating to develop the best solutions for the client; seamless interconnectivity with bank services Personalized client prospecting and relationship management programs with scalability Large Advisory Firms Boutique Investment Firms Fully Internalized Investment Office Experienced & credentialed team using specialized research and analysis to develop adaptive, tax efficient investment strategies Uniquely positioned to combine the capabilities of larger advisory firms with the personalized approach of a boutique investment firm INVESTMENT MANAGEMENT FINANCIAL PLANNING TAX PLANNING & PREPARATION PRIVATE CLIENT TRUST SERVICES LEGACY PLANNING AG SERVICES HOUSEHOLD OPERATIONS Nearly 160 year-old firm with an uncompromised commitment to always act in the best interest of our clients, guiding decisions on what matters most and building a path to multigenerational success Core satellite portfolios have produced outperformance vs. benchmarks1 in 1-Year, 3-Year, 5-Year, and 7-Year measurement periods 1 Busey Wealth Management’s blended portfolio returns vs. blended benchmark of 60% MSCI All-Country World Index and 40% Bloomberg Intermediate Govt/Credit Index

162Q26 Earnings Investor Presentation First Busey Corporation | Ticker: BUSE 61.8% 58.7% 55.3% 54.9% 55.1% 54.8% 54.0% 2024 Q4 2025 Q1 2025 Q2 2025 Q3 2025 Q4 2026 Q1 2026 Q2 $ in millions 2025 Q2 2025 Q3 2025 Q4 2026 Q1 2026 Q2 Noninterest Expense $127.8 $120.0 $120.3 $129.5 $112.6 Acquisition & Restructuring Expenses (-) $16.6 $7.2 $4.8 $16.7 $3.1 Adjusted NIE 1 $111.2 $112.8 $115.5 $112.8 $109.5 Amortization of Intangibles (-) $4.6 $4.5 $4.4 $4.3 $4.2 Adjusted NIE excluding Amortization of Intangibles 1 $106.6 $108.3 $111.1 $108.5 $105.3 1 Non-GAAP, see Appendix | Note: Certain totals above may not tie exactly due to rounding. Detail amounts can be found in Non-GAAP table within Appendix Noninterest Expense Focused Control on Expenses $ in millions 2026 Q1 QoQ Change 2026 Q2 % of Total Adj. Salaries & Benefits $69.1 -5.1% $65.6 59.9 % Data processing $9.8 -9.2% $8.9 8.1 % Occupancy & Equipment $9.8 +4.1% $10.2 9.3 % Professional fees $3.1 -25.8% $2.3 2.1 % Amort. of intangible assets $4.3 -2.3% $4.2 3.8 % Other NIE $16.7 +9.6% $18.3 16.7 % Adjusted NIE 1 $112.8 -2.9% $109.5 100 % ▪ Company priority to continue delivering positive operating leverage: Positive operating leverage of +1.4% in 2Q26 ▪ Expense discipline offset headwinds from loan contraction and purchase accounting accretion compression ▪ Adjusted NIE (including amortization of intangibles) decreased 2.9% QoQ ▪ Continue to be mindful and diligent on expenses, focused on employing the best talent and deploying a best-in-class product set to position the company for efficient future growth ▪ Operating revenue1 per employee is $106k at 6/30/2026 compared to $78k at 12/31/2024, up 37% since 12/31/2024 ▪ Successfully delivered significant cost synergies since acquisition of CrossFirst Bankshares on 3/1/2025 Efficiency Ratio 1 Trend Adjusted Noninterest Expense Summary

172Q26 Earnings Investor Presentation First Busey Corporation | Ticker: BUSE 39% 39% 37% 39% 37% 77% 63% 86% 151% 144% Dividend Payout Ratio Payout Ratio with Dividends & Share Repurchases 2025 Q2 2025 Q3 2025 Q4 2026 Q1 2026 Q2 —% 50% 100% 150% $1,888 $1,908 $1,920 $1,880 $1,859 12.2% 12.3% 12.4% 12.3% 12.5% 7.0% Common Equity Tier 1 CET1 Ratio Min + Buffer Ratio 2025 Q2 2025 Q3 2025 Q4 2026 Q1 2026 Q2 $1,709 $1,748 $1,773 $1,722 $1,697 9.3% 9.9% 10.1% 9.8% 9.6% TCE TCE Ratio 2025 Q2 2025 Q3 2025 Q4 2026 Q1 2026 Q2 Tangible Common Equity 1 1 Non-GAAP calculation, see Appendix | 2 2Q26 capital ratios are preliminary estimates 3 Common dividends and share repurchases during period divided by adjusted net income available to common shareholders during period $ in millions Common Equity Tier 1 Ratio Tier 1 Capital Ratio Total Capital Ratio Capital Ratio 12.5 % 14.0 % 16.1 % Minimum Well Capitalized with Capital Buffer 7.0 % 8.5 % 10.5 % Amount of Capital $1,859 $2,082 $2,390 Well Capitalized Minimum with Buffer $1,039 $1,262 $1,558 Excess over Well Cap. Min. with Buffer $820 $820 $832 $ in millions $ in millions Robust Capital Foundation Common Equity Tier 1 2 Consolidated Capital as of 6/30/26 2Adjusted Common Stock Payout Ratio 3

Appendix

192Q26 Earnings Investor Presentation First Busey Corporation | Ticker: BUSE Seasoned Leadership Team Has served as Chairman & CEO of First Busey since 2007 and became Chairman of the Board effective July 2020. Offers 40 years of diverse financial services experience and extensive board involvement with a conservative operating philosophy and management style that focuses on Busey’s associates, customers, communities and shareholders. Van A. Dukeman Chairman, President & CEO, First Busey Corp. Chairman & CEO, Busey Bank Tony Hammond President, Busey Bank Joined Busey in 2008 and has nearly 30 years of financial and leadership experience. Oversees various areas at Busey and its subsidiaries, including human resources, corporate communications, executive administration, marketing, the overall Busey experience, enterprise and strategic projects, as well as consumer and digital banking. Prior to Busey, Amy worked for 10+ years with CliftonLarsonAllen LLP. Amy L. Randolph Chief Operating Officer Joined Busey in January 2020 with over 25 years of financial leadership experience, including a 16-year tenure with KeyCorp. Oversees various areas at Busey and its subsidiaries, including enterprise, operational and third-party risk management, compliance, fair and responsible banking, vendor management, model risk, business continuity and information security. Monica L. Bowe Chief Risk Officer Joined Busey in March 2025 with the CrossFirst Bankshares merger and oversees various areas at Busey and its subsidiaries, including all information technology and business services and systems, service support, enterprise lending services, enterprise deposits and payments, and facilities. Previously, Amy held multiple executive leadership roles with CrossFirst Bank, most recently serving as Chief Operating Officer. Amy J. Fauss Chief Information & Technology Officer Joined Busey in 2011 and has over 20 years of experience in the financial services industry. Chip oversees all aspects of credit administration at Busey Bank, including commercial and consumer credit, portfolio monitoring and special assets. Before being named Chief Credit Officer in 2025, he has held the roles of President of Credit and Bank Administration, Co-Chief Banking Officer, and Regional President for Commercial Banking. Chip Jorstad Chief Credit Officer Joined Busey in September 2025. Oversees various areas at Busey and its subsidiaries—including accounting and corporate reporting, financial planning and analysis, budgeting and forecasting, artificial intelligence, capital management, treasury, specialty finance and community investments, corporate development and investor relations. Chris previously served as Chief Strategy Officer at First National Bank, the largest subsidiary of F.N.B. Corporation. Chris H.M. Chan Chief Financial Officer Joined Busey in December 2011 and has over 45 years of legal experience. He oversees all legal matters and leads Busey’s corporate governance efforts. Prior to joining Busey, he was a shareholder in the law firm of Meyer Capel. John J. Powers General Counsel 2026 Executive Compensation Performance-Based Measures Weighting Short-term incentives Operating EPS 40% Asset Quality vs. Proxy Peer Group 25% Fee Revenue from Wealth Mgmt., Payment Technology Solutions, Treasury Mgmt., and Capital Markets 20% Core Deposit Growth 10% Regulatory Ratings 5% Total 100% Long-term incentives Relative Total Shareholder Return vs. KRE constituents 50% Relative Operating ROAA vs. Proxy Peer Group 25% Relative TBV growth ex-AOCI plus cumulative dividends and share repurchases vs. Proxy Peer Group 25% Total 100% Executive compensation reinforces corporate priorities and is aligned with driving long-term shareholder value Joined Busey in May 2025. Oversees Busey’s regional operating sales and revenue model which includes all commercial, wealth, treasury management, payments and specialty business units. Tony has two decades of commercial banking experience—including serving as Head of Commercial and Middle Market Banking at HTLF and senior leadership roles at Arizona Bank & Trust, Johnson Bank and BOK Financial—with a track record of consistently leading high-performing teams, growing market share and attracting top talent across the industry.

202Q26 Earnings Investor Presentation First Busey Corporation | Ticker: BUSE Estimated accretion schedule of loan discounts based on anticipated contractual cash flow. These projections include remaining purchase accounting impact from all prior M&A transactions. Purchase Accounting Projections ($ in thousands) Actuals Accretion/Amortization Impact Item 1Q25 2Q25 3Q25 4Q25 1Q26 2Q26 3Q26 4Q26 FY 2027 Thereafter Loans Accretion 2,272 6,576 6,088 5,571 5,760 4,513 4,802 4,344 14,703 52,651 CD Accretion 659 921 135 -5 -8 -6 -7 -5 13 275 Borrowings Amortization -203 -378 -369 -366 -357 -358 -358 -359 -1,015 -2,692 Net NII Impact 2,728 7,119 5,854 5,200 5,394 4,150 4,436 3,981 13,702 50,234 Core Deposit Intangible & Wealth Intangibles Amortization -3,083 -4,592 -4,507 -4,432 -4,291 -4,232 -4,151 -4,082 -15,342 -65,350 Total Pre-Tax Income Impact -355 2,527 1,347 768 1,103 -82 285 -101 -1,640 -15,116

212Q26 Earnings Investor Presentation First Busey Corporation | Ticker: BUSE Non-GAAP Financial Information This presentation contains certain financial information determined by methods other than U.S. Generally Accepted Accounting Principles (“GAAP”). Management uses these non- GAAP measures, together with the related GAAP measures, in analysis of Busey’s performance and in making business decisions, as well as for comparison to Busey’s peers. Busey believes the adjusted measures are useful for investors and management to understand the effects of certain non-core and non-recurring items and provide additional perspective on Busey’s performance over time. Included in the Appendix are tables that present reconciliations between these non-GAAP measures and what management believes to be the most directly comparable GAAP financial measures. These non-GAAP disclosures have inherent limitations and are not audited. They should not be considered in isolation or as a substitute for operating results reported in accordance with GAAP, nor are they necessarily comparable to non-GAAP performance measures that may be presented by other companies. Tax-effected numbers included in these non-GAAP disclosures are based on estimated statutory rates, estimated federal income tax rates, or effective tax rates, as noted in the tables below.

222Q26 Earnings Investor Presentation First Busey Corporation | Ticker: BUSE Non-GAAP Financial Information (Unaudited) Calculation of Adjusted Net Income and Adjusted Diluted Earnings Per Common Share Three Months Ended Six Months Ended (dollars in thousands, except per share amounts) June 30, 2026 March 31, 2026 June 30, 2025 June 30, 2026 June 30, 2025 Net income (GAAP) [a] $ 63,176 $ 49,981 $ 47,404 $ 113,157 $ 17,414 Day 2 provision for credit losses1 — — — — 45,572 Adjustment of initial provision for unfunded commitments due to adoption of new model2 — — 4,030 — 4,030 Other acquisition expenses 1,196 5,244 16,600 6,440 42,626 Restructuring expenses 1,930 11,456 — 13,386 — Net securities (gains) losses (2,445) 940 (5,997) (1,505) 9,771 Related tax benefit3 (170) (4,410) (4,971) (4,580) (27,040) Non-recurring deferred tax adjustment4 — — 328 — 4,919 Adjusted net income (Non-GAAP) [b] 63,687 63,211 57,394 126,898 97,292 Preferred dividends [c] 4,590 4,589 155 9,179 155 Adjusted net income available to common stockholders (Non-GAAP) [d] $ 59,097 $ 58,622 $ 57,239 $ 117,719 $ 97,137 Weighted average number of common shares outstanding, diluted (GAAP) [e] 85,385,382 87,831,295 90,883,711 86,602,278 80,251,577 Diluted earnings per common share (GAAP) [(a-c)÷e] $ 0.69 $ 0.52 $ 0.52 $ 1.20 $ 0.22 Adjusted diluted earnings per common share (Non-GAAP) [d÷e] $ 0.69 $ 0.67 $ 0.63 $ 1.36 $ 1.21 ___________________________________________ 1. The Day  2 provision represents the initial provision for credit losses recorded in connection with the CrossFirst acquisition to establish an allowance on non-PCD loans and unfunded commitments and is reflected within the provision for credit losses line on the Statements of Income. 2. In the second quarter of 2025, Busey recorded an adjustment to the initial provision for unfunded commitments for CrossFirst acquisition-date balances based on revised estimates resulting from implementation of a new CECL model. 3. Tax benefits were calculated using tax rates of 25.0% and 26.5% for the six months ended June 30, 2026 and 2025, respectively. Tax benefits for quarterly periods were calculated as the year-to-date tax amounts less the tax reported for previous quarters during the year. 4. A deferred valuation tax adjustment was recorded in the first quarter of 2025 in connection with the CrossFirst acquisition and the expansion of Busey’s footprint into new states. Deferred tax adjustments are reflected within the income taxes line on the Statements of Income.

232Q26 Earnings Investor Presentation First Busey Corporation | Ticker: BUSE Non-GAAP Financial Information (Unaudited) ___________________________________________ 1. Tax effects were calculated using income tax rates of 25.0% and 26.5% for the six months ended June 30, 2026 and 2025, respectively. Tax effects for quarterly periods were calculated as the year-to-date tax amounts less the tax reported for previous quarters during the year. 2. A reconciliation is provided in the previous table. 3. Annualized measure. 4. Beginning in 2026, Busey revised, for all periods presented, its calculation of return on average tangible common equity and adjusted return on average tangible common equity to eliminate the effects of intangible asset amortization from the numerator of both calculations. Calculation of Return On Average Assets, Return On Average Tangible Common Equity, and Related Adjusted Return Measures Three Months Ended Six Months Ended (dollars in thousands) June 30, 2026 March 31, 2026 June 30, 2025 June 30, 2026 June 30, 2025 Net income (GAAP) [a] $ 63,176 $ 49,981 $ 47,404 $ 113,157 $ 17,414 Amortization of intangible assets 4,232 4,291 4,592 8,523 7,675 Tax effect of amortization of intangible assets1 (1,058) (1,073) (1,256) (2,131) (2,035) Preferred dividends (4,590) (4,589) (155) (9,179) (155) Tangible net income available to common stockholders (Non-GAAP) [b] $ 61,760 $ 48,610 $ 50,585 $ 110,370 $ 22,899 Adjusted net income (Non-GAAP)2 [c] $ 63,687 $ 63,211 $ 57,394 $ 126,898 $ 97,292 Amortization of intangible assets 4,232 4,291 4,592 8,523 7,675 Tax effect of amortization of intangible assets1 (1,058) (1,073) (1,256) (2,131) (2,035) Preferred dividends (4,590) (4,589) (155) (9,179) (155) Adjusted tangible net income available to common stockholders (Non-GAAP) [d] $ 62,271 $ 61,840 $ 60,575 $ 124,111 $ 102,777 Average total assets [e] $ 17,887,097 $ 18,060,220 $ 19,068,086 $ 17,973,180 $ 16,961,396 Return on average assets (Non-GAAP)3 [a÷e] 1.42 % 1.12 % 1.00 % 1.27 % 0.21 % Adjusted return on average assets (Non-GAAP)3 [c÷e] 1.43 % 1.42 % 1.21 % 1.42 % 1.16 % Average common equity $ 2,183,290 $ 2,255,075 $ 2,180,963 $ 2,218,984 $ 2,057,372 Average goodwill and other intangible assets, net (474,043) (478,885) (494,473) (476,450) (452,978) Average tangible common equity (Non-GAAP) [f] $ 1,709,247 $ 1,776,190 $ 1,686,490 $ 1,742,534 $ 1,604,394 Return on average tangible common equity (Non-GAAP)3, 4 [b÷f] 14.49 % 11.10 % 12.03 % 12.77 % 2.88 % Adjusted return on average tangible common equity (Non-GAAP)3, 4 [d÷f] 14.61 % 14.12 % 14.41 % 14.36 % 12.92 %

242Q26 Earnings Investor Presentation First Busey Corporation | Ticker: BUSE Non-GAAP Financial Information (Unaudited) Calculation of Net Interest Margin and Adjusted Net Interest Margin Three Months Ended Six Months Ended (dollars in thousands) June 30, 2026 March 31, 2026 June 30, 2025 June 30, 2026 June 30, 2025 Net interest income (GAAP) $ 152,402 $ 153,969 $ 153,183 $ 306,371 $ 256,914 Tax-equivalent adjustment1 841 877 791 1,718 1,328 Tax-equivalent net interest income (Non-GAAP) [a] 153,243 154,846 153,974 308,089 258,242 Purchase accounting accretion related to business combinations (4,150) (5,394) (7,119) (9,544) (9,847) Adjusted net interest income (Non-GAAP) [b] $ 149,093 $ 149,452 $ 146,855 $ 298,545 $ 248,395 Average interest-earning assets (Non-GAAP) [c] $ 16,508,372 $ 16,665,766 $ 17,700,356 $ 16,586,634 $ 15,543,955 Net interest margin (Non-GAAP)2 [a÷c] 3.72 % 3.77 % 3.49 % 3.75 % 3.35 % Adjusted net interest margin (Non-GAAP)2 [b÷c] 3.62 % 3.64 % 3.33 % 3.63 % 3.22 % ___________________________________________ 1. Tax-equivalent adjustments were calculated using an estimated federal income tax rate of 21%, applied to non-taxable interest income on investments and loans. 2. Annualized measure. ___________________________________________ 1. Annualized measure. Calculation of Pre-Provision Net Revenue and Related Measures Three Months Ended Six Months Ended (dollars in thousands) June 30, 2026 March 31, 2026 June 30, 2025 June 30, 2026 June 30, 2025 Net interest income (GAAP) $ 152,402 $ 153,969 $ 153,183 $ 306,371 $ 256,914 Total noninterest income (GAAP) 44,311 42,265 44,863 86,576 66,086 Net security (gains) losses (GAAP) (2,445) 940 (5,997) (1,505) 9,771 Total noninterest expense (GAAP) (112,635) (129,519) (127,833) (242,154) (239,863) Pre-provision net revenue (Non-GAAP) [a] 81,633 67,655 64,216 149,288 92,908 Acquisition and restructuring (income) expenses, excluding initial provision expenses 3,126 16,700 16,600 19,826 42,626 Adjusted pre-provision net revenue (Non-GAAP) [b] $ 84,759 $ 84,355 $ 80,816 $ 169,114 $ 135,534 Average total assets [c] $ 17,887,097 $ 18,060,220 $ 19,068,086 $ 17,973,180 $ 16,961,396 Pre-provision net revenue to average total assets (Non-GAAP)1 [a÷c] 1.83 % 1.52 % 1.35 % 1.67 % 1.10 % Adjusted pre-provision net revenue to average total assets (Non-GAAP)1 [b÷c] 1.90 % 1.89 % 1.70 % 1.90 % 1.61 %

252Q26 Earnings Investor Presentation First Busey Corporation | Ticker: BUSE Non-GAAP Financial Information (Unaudited) ___________________________________________ 1. Tax-equivalent adjustments were calculated using an estimated federal income tax rate of 21%, applied to non-taxable interest income on investments and loans. 2. Beginning in 2026, Busey changed the caption for this revenue measure, which was previously called “adjusted tax-equivalent revenue.” The calculation itself has not changed. 3. Beginning in 2026, to better align with industry standards, Busey revised its calculation of adjusted noninterest expense, for all periods presented, to exclude any adjustment for amortization of intangible assets. 4. Beginning in 2026, Busey changed the caption for the efficiency ratio numerator from “adjusted noninterest expense” to “adjusted noninterest expense excluding amortization of intangible assets.” The calculation itself has not changed. 5. Beginning in 2026, Busey now reports a single efficiency ratio, which was previously reported as the “Adjusted efficiency ratio.” Calculation of Efficiency Ratio Three Months Ended Six Months Ended (dollars in thousands) June 30, 2026 March 31, 2026 June 30, 2025 June 30, 2026 June 30, 2025 Net interest income (GAAP) [a] $ 152,402 $ 153,969 $ 153,183 $ 306,371 $ 256,914 Tax-equivalent adjustment1 841 877 791 1,718 1,328 Tax-equivalent net interest income (Non-GAAP) [b] 153,243 154,846 153,974 308,089 258,242 Total noninterest income (GAAP) 44,311 42,265 44,863 86,576 66,086 Net security (gains) losses (2,445) 940 (5,997) (1,505) 9,771 Adjusted noninterest income (Non-GAAP) [c] $ 41,866 $ 43,205 $ 38,866 $ 85,071 $ 75,857 Operating revenue (Non-GAAP) [d = a+c] $ 194,268 $ 197,174 $ 192,049 $ 391,442 $ 332,771 Tax-equivalent operating revenue (Non-GAAP)2 [e = b+c] 195,109 198,051 192,840 393,160 334,099 Adjusted noninterest income to operating revenue (Non-GAAP) [c÷d] 21.55 % 21.91 % 20.24 % 21.73 % 22.80 % Total noninterest expense (GAAP) $ 112,635 $ 129,519 $ 127,833 $ 242,154 $ 239,863 Acquisition and restructuring expenses, excluding initial provision expenses (3,126) (16,700) (16,600) (19,826) (42,626) Adjusted noninterest expense (Non-GAAP)3 109,509 112,819 111,233 222,328 197,237 Amortization of intangible assets (4,232) (4,291) (4,592) (8,523) (7,675) Adjusted noninterest expense excluding amortization of intangible assets (Non-GAAP)4 [f] $ 105,277 $ 108,528 $ 106,641 $ 213,805 $ 189,562 Efficiency ratio (Non-GAAP)5 [f÷e] 53.96 % 54.80 % 55.30 % 54.38 % 56.74 %

262Q26 Earnings Investor Presentation First Busey Corporation | Ticker: BUSE Non-GAAP Financial Information (Unaudited) Calculation of Tangible Common Equity, and Related Measures and Ratio As of (dollars in thousands, except per share amounts) June 30, 2026 March 31, 2026 June 30, 2025 Total assets (GAAP) $ 18,191,867 $ 18,036,622 $ 18,918,740 Goodwill and other intangible assets, net (471,288) (475,520) (488,181) Tangible assets (Non-GAAP)1 [a] $ 17,720,579 $ 17,561,102 $ 18,430,559 Total stockholders’ equity (GAAP) $ 2,383,170 $ 2,413,022 $ 2,412,546 Preferred stock and additional paid in capital on preferred stock (215,197) (215,197) (215,197) Common equity [b] $ 2,167,973 $ 2,197,825 $ 2,197,349 Goodwill and other intangible assets, net (471,288) (475,520) (488,181) Tangible common equity (Non-GAAP) [c] $ 1,696,685 $ 1,722,305 $ 1,709,168 Tangible common equity to tangible assets (Non-GAAP) [c÷a] 9.57 % 9.81 % 9.27 % Ending number of common shares outstanding (GAAP) [d] 83,189,501 85,507,160 89,104,678 Book value per common share (Non-GAAP) [b÷d] $ 26.06 $ 25.70 $ 24.66 Tangible book value per common share (Non-GAAP) [c÷d] $ 20.40 $ 20.14 $ 19.18 Calculation of Core Deposits and Related Ratio As of (dollars in thousands) June 30, 2026 March 31, 2026 June 30, 2025 Total deposits (GAAP) [a] $ 15,128,745 $ 14,736,060 $ 15,801,772 Brokered deposits, excluding brokered time deposits of $250,000 or more (60,043) (60,123) (353,614) Time deposits of $250,000 or more (896,354) (865,493) (827,762) Core deposits (Non-GAAP) [b] $ 14,172,348 $ 13,810,444 $ 14,620,396 Core deposits to total deposits (Non-GAAP) [b÷a] 93.68 % 93.72 % 92.52 %

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