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Form 8-K

sec.gov

8-K — ISABELLA BANK CORP

Accession: 0000842517-26-000108

Filed: 2026-05-28

Period: 2026-05-28

CIK: 0000842517

SIC: 6022 (STATE COMMERCIAL BANKS)

Item: Other Events

Item: Financial Statements and Exhibits

Documents

8-K — isba-20260528.htm (Primary)

EX-99.1 (isba_2026q2xdivannxex991.htm)

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8-K

8-K (Primary)

Filename: isba-20260528.htm · Sequence: 1

isba-20260528

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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): May 28, 2026

ISABELLA BANK CORPORATION

(Exact name of registrant as specified in its charter)

Michigan 000-18415   38-2830092

(State or other jurisdiction

of incorporation) (Commission

File Number)   (IRS Employer

Identification No.)

401 North Main Street Mt. Pleasant Michigan   48858-1649

(Address of principal executive offices)   (Zip Code)

Registrant’s telephone number, including area code: (989) 772-9471

Not Applicable

(Former name or former address, if changed since last report.)

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

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

☐ Soliciting material pursuant to Rule l4a-12 under the Exchange Act (17 CFR 240.l4a-l2)

☐ Pre-commencement communications pursuant to Rule l4d-2(b) under the Exchange Act (17 CFR 240.l4d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.l3e-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, no par value per share ISBA

The 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).

Emerging growth company ☐

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

Section 8 - Other Events

Item 8.01 Other Events.

On May 28, 2026, Isabella Bank Corporation issued a press release announcing that its Board of Directors declared a twenty-eight cent ($0.28) per common share second quarter cash dividend, payable June 30, 2026 to shareholders of record as of June 26, 2026.

A copy of the press release is filed as Exhibit 99.1 to this Form 8-K and is incorporated herein by reference.

The information in this Item 8.01 of Form 8-K and Exhibit 99.1 attached hereto shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing made by the registrant under the Securities Act of 1933, whether made before or after the date hereof, except as shall be expressly set forth by specific reference in such filing.

Section 9 - Financial Statements and Exhibits

Item 9.01 Financial Statements and Exhibits.

(d)    Exhibits:

Exhibit

No. Description

99.1

Press release issued May 28, 2026

104 Cover page interactive data file - the cover page XBRL tags are embedded within the inline XBRL document

SIGNATURES

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

ISABELLA BANK CORPORATION

Dated: May 28, 2026   By:   /s/ Gerald J. Ritzert

Gerald J. Ritzert, CFO

EX-99.1

EX-99.1

Filename: isba_2026q2xdivannxex991.htm · Sequence: 2

Document

Exhibit 99.1

Isabella Bank Corporation Announces Second Quarter 2026 Dividend

Mt. Pleasant, Michigan, May 28, 2026 - Isabella Bank Corporation (Nasdaq: ISBA) today announced its Board of Directors declared a second-quarter cash dividend of $0.28 per common share at its regular meeting on May 26, 2026. The dividend will be payable June 30, 2026 to shareholders of record as of June 26, 2026. Based on ISBA’s closing stock price of $41.59 per share as of May 26, 2026, the annualized cash dividend yield is 2.69%.

About Isabella Bank Corporation

Isabella Bank Corporation (Nasdaq: ISBA) is the parent holding company of Isabella Bank, a state-chartered community bank headquartered in Mt. Pleasant, Michigan. Isabella Bank was established in 1903 and has been committed to serving its customers' and communities' local banking needs for over 120 years. The Bank offers personal and commercial lending and deposit products, as well as investment, trust, and estate planning services through Isabella Wealth. The Bank has 31 locations throughout eight Mid-Michigan counties: Bay, Clare, Gratiot, Isabella, Mecosta, Midland, Montcalm, and Saginaw.

For more information about Isabella Bank Corporation, visit the Investor Relations link at www.isabellabank.com.

Contact

Lori Peterson, Director of Marketing

Phone: 989-779-6333 Fax: 989-775-5501

Forward-Looking Statements

Information in this release contains certain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Rule 175 promulgated thereunder, and Section 21E of the Securities Exchange Act of 1934, as amended and Rule 3b-6 promulgated thereunder. We intend such forward looking statements to be covered by the safe harbor provisions for forward looking statements contained in the Private Securities Litigation Reform Act of 1995, and are included in this statement for purposes of these safe harbor provisions. Forward-looking statements generally relate to losses, impact of events, financial condition, plans, objectives, outlook for earnings, revenues, expenses, capital and liquidity levels and ratios, asset levels, asset quality, financial position, and other matters regarding or affecting the Company and its future business and operations. Forward-looking statements are typically identified by words or phrases such as “will likely result", “expect”, “plan”, “believe”, “estimate”, “anticipate”, “strategy”, “trend”, “forecast”, “outlook”, “project”, “intend”, “assume”, “outcome”, “continue”, “remain”, “potential”, “opportunity”, “comfortable”, “current”, “position”, “maintain”, “sustain”, “seek”, “achieve” and variations of such words and similar expressions, or future or conditional verbs such as will, would, should, could or may. Although we believe the assumptions upon which these forward-looking statements are based are reasonable, any of these assumptions could prove to be inaccurate and the forward-looking statements based on these assumptions could be incorrect. The matters discussed in these forward-looking statements are subject to various risks, uncertainties and other factors that could cause actual results and trends to differ materially from those made, projected, or implied in or by the forward-looking statements depending on a variety of uncertainties or other factors described in the Company’s Annual Report on Form 10-K for the year ended December 31, 2025, or included in any subsequent filing by the Company with the Securities and Exchange Commission. Forward-looking statements are based on beliefs and assumptions using information available at the time the statements are made. The Company cautions you not to unduly rely on forward-looking statements because the assumptions, beliefs, expectations, and projections about future events may, and often do, differ materially from actual results. Any forward-looking statement speaks only as to the date on which it is made, and we undertake no obligation to update any forward-looking statement to reflect developments occurring after the statement is made.

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