ISABELLA BANK CORP
For the period ended Sep 30, 2026. Filed Oct 30, 2026.
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A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.
Sep 30, 2026 · Filed Oct 30, 2026
ISBA$41.14+1.2%Stored close · as of Nov 9, 2026
Extracted filing text, with the paragraph anchors used by the comparison.
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Item 6. Exhibits
(a) Exhibits
| Exhibit Number | Exhibits |
| 1.1 | Equity Distribution Agreement, dated June 16, 2026, by and among Isabella Bank Corporation, Isabella Bank and Piper Sandler & Co.(1) |
| 2.1 | Agreement and Plan of Merger, dated as of June 11, 2026, by and among Isabella Bank Corporation, Grand River Commerce, Inc. and 401 Merger Sub, Inc.(2) |
| 3.1 | Amended Articles of Incorporation(3) |
| 3.2 | Amendment to the Articles of Incorporation(4) |
| 3.3 | Amendment to the Articles of Incorporation(5) |
| 3.4 | Amendment to the Articles of Incorporation(6) |
| 3.5 | Amendment to the Articles of Incorporation(7) |
| 3.6 | Second Amended and Restated Bylaws, as amended on September 24, 2025(8) |
| 10.1 | Form of Grand River Voting Agreement, dated as of June 11, 2026, by and among Isabella Bank Corporation and directors and officers of Grand River Commerce, Inc.(9) |
| 10.2* | Participation Agreement, dated August 11, 2026, by and between Isabella Bank Corporation and Gerald J. Ritzert(10) |
| 31.1 | Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 by the Principal Executive Officer |
| 31.2 | Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 by the Principal Financial Officer |
| 32 | Section 1350 Certification of Principal Executive Officer and Principal Financial Officer |
| 101.1** | 101.INS (Inline XBRL Instance Document) |
| 101.SCH (Inline XBRL Taxonomy Extension Schema Document) | |
| 101.CAL (Inline XBRL Calculation Linkbase Document) | |
| 101.LAB (Inline XBRL Taxonomy Label Linkbase Document) | |
| 101.DEF (Inline XBRL Taxonomy Linkbase Document) | |
| 101.PRE (Inline XBRL Taxonomy Presentation Linkbase Document) | |
| 104 | Cover Page Interactive Data File |
| * | Management Contract or Compensatory Plan or Arrangement. |
| ** | In accordance with Rule 406T of Regulations S-T, the XBRL related information shall not be deemed to be “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liability of that section, and shall not be part of any registration statement or other document filed under the Securities Act or the Exchange Act, except as shall be expressly set forth by specific reference in such filing. |
| (1) | Previously filed as an Exhibit to the Isabella Bank Corporation Form 8-K, filed June 16, 2026, and incorporated herein by reference. |
| (2) | Previously filed as an Exhibit to the Isabella Bank Corporation Form 8-K, filed June 15, 2026, and incorporated herein by reference. |
| (3) | Previously filed as an Exhibit to the Isabella Bank Corporation Form 10-K, filed March 12, 1991, and incorporated herein by reference |
| (4) | Previously filed as an Exhibit to the Isabella Bank Corporation Form 10-K, filed March 26, 1994, and incorporated herein by reference. |
| (5) | Previously filed as an Exhibit to the Isabella Bank Corporation Form 10-K, filed March 22, 2000, and incorporated herein by reference. |
| (6) | Previously filed as an Exhibit to the Isabella Bank Corporation Form 10-K, filed March 27, 2001, and incorporated herein by reference. |
| (7) | Previously filed as an Exhibit to the Isabella Bank Corporation Form 8-K, filed May 16, 2008, and incorporated herein by reference. |
| (8) | Previously filed as an Exhibit to the Isabella Bank Corporation Form 8-K, filed September 30, 2025, and incorporated herein by reference. |
| (9) | Previously filed as an Exhibit to the Isabella Bank Corporation Form 8-K, filed June 15, 2026, and incorporated herein by reference. |
| (10) | Previously filed as an Exhibit to the Isabella Bank Corporation Form 8-K, filed August 14, 2026, and incorporated herein by reference. |
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