1 unchanged sentence
Securities Trading Plans of Executive Officers
−Removed: During the fiscal quarter ended September 30, 2025, none of the Corporation’s directors or officers adopted , modified or terminated a “Rule 10b5-1 trading arrangement” or a “non-Rule 10b5-1 trading arrangement,” in each case as defined in Item 408 of Regulation S-K.
+Added: During the fiscal quarter ended March 31, 2026, none of the Corporation’s directors or officers adopted , modified or terminated a “Rule 10b5-1 trading arrangement” or a “non-Rule 10b5-1 trading arrangement,” in each case as defined in Item 408 of Regulation S-K.
Exhibit Number Exhibits
4 unchanged sentences
Amendment to the Articles of Incorporation (5)
−Removed: Second A mended and Restated Bylaws , as amended on September 24, 2025 ( 6 )
+Added: Second Amended and Restated Bylaws, as amended on September 24, 2025 (6)
Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 by the Principal Executive Officer
17 unchanged sentences
Isabella Bank Corporation
−Removed: November 10, 2025 /s/ Jerome E.
+Added: May 6, 2026 /s/ Jerome E.
President and Chief Executive Officer
(Principal Executive Officer)
−Removed: November 10, 2025 /s/ Neil M.
−Removed: Isabella Bank President and Interim Chief Financial Officer
+Added: May 6, 2026 /s/ Gerald J.
+Added: Chief Financial Officer
(Principal Financial Officer)
Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.