Isabella Bank (ISBA) director acquires 277.3296 shares at $49.58

Rhea-AI Filing Summary

Isabella Bank Corporation director Sarah R. Opperman acquired additional common stock through compensation arrangements. On 01/20/2026, she obtained 277.3296 shares of Isabella Bank Corporation common stock at $49.58 per share, coded as a purchase. These shares were acquired with director fees under the Isabella Bank Corporation and Related Companies Deferred Compensation Plan for Directors. After this transaction, she beneficially owned 24,412.0602 common shares held directly, a figure that also includes shares accumulated through quarterly dividend reinvestment.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Opperman Sarah R

(Last) (First) (Middle)

2313 OAKFIELD DRIVE

(Street)

MIDLAND MI 48640

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
ISABELLA BANK CORP [ ISBA ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
01/20/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
common	01/20/2026		P(1)		277.3296	A	$49.58	24,412.0602(2)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Shares acquired with director fees pursuant to the Isabella Bank Corporation And Related Companies Deferred Compensation Plan For Directors.

2. Includes shares acquired through quarterly dividend reinvestment.

Remarks:

	/s/ Jennifer L. Gill, By Power of Attorney	01/23/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did Isabella Bank (ISBA) director Sarah R. Opperman report on this Form 4?

Director Sarah R. Opperman reported acquiring 277.3296 shares of Isabella Bank Corporation common stock on 01/20/2026, coded as a purchase at $49.58 per share.

How many Isabella Bank (ISBA) shares does the director own after this transaction?

Following the reported transaction, Sarah R. Opperman beneficially owned 24,412.0602 shares of Isabella Bank Corporation common stock held directly.

How were the new Isabella Bank (ISBA) shares acquired by the director?

The 277.3296 shares were acquired with director fees pursuant to the Isabella Bank Corporation and Related Companies Deferred Compensation Plan for Directors.

Does the Form 4 mention dividend reinvestment for Isabella Bank (ISBA) shares?

Yes. The filing notes that the director’s total beneficial ownership includes shares acquired through quarterly dividend reinvestment.

Is this Isabella Bank (ISBA) Form 4 transaction reported as direct or indirect ownership?

The shares reported in this Form 4 are shown as directly owned (D) by director Sarah R. Opperman.

What is the transaction code used in this Isabella Bank (ISBA) Form 4?

The transaction is identified with code P, indicating a purchase of Isabella Bank Corporation common stock.