[Form 4] Isabella Bank Corporation Common stock Insider Trading Activity

Rhea-AI Filing Summary

Sarah R. Opperman, a director of Isabella Bank Corp (ISBA), reported a non-derivative purchase of common stock. On 09/02/2025 she acquired 52 shares at a price of $33.13 per share. The filing states the post-transaction beneficial ownership as 24,046.1037 shares. The form notes the acquired shares include amounts purchased through the company's quarterly dividend reinvestment plan. The Form 4 was signed by power of attorney on 09/04/2025.

Positive

• Director acquisition reported demonstrating insider participation via the company's dividend reinvestment plan
• Clear disclosure of transaction details including date, price, quantity, and post-transaction ownership

Negative

• None.

Insights

Corporate Governance Expert

TL;DR: Director made a small, routine purchase via dividend reinvestment; ownership remains modest relative to company scale.

The reported purchase of 52 shares at $33.13 appears to be a routine acquisition executed in part through the issuer's dividend reinvestment plan. This transaction does not indicate a change in control or a material shift in insider ownership given the post-transaction total of 24,046.1037 shares. The use of a power of attorney for filing is common and the filing date is promptly recorded. There is no derivative activity reported and no additional compensatory or unusual transactions disclosed.

Securities Compliance Analyst

TL;DR: Transaction is procedural and compliant; no derivative instruments or complex arrangements disclosed.

The Form 4 documents a straightforward non-derivative acquisition coded as "A" for acquisition. The explanation specifies inclusion of shares from the quarterly dividend reinvestment program which explains the small size of the transaction. There are no indicators of option exercises, sales, or hedging arrangements. The filing was executed by a named attorney-in-fact and includes the required signature and dates.

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

OMB APPROVAL

OMB Number:			3235-0287
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hours per response:			0.5

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)
09/02/2025

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	09/02/2025		A		52	A	$33.13	24,046.1037(1)	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. Includes shares acquired through quarterly dividend reinvestment.

Remarks:

	/s/ Jerome E. Schwind, By Power of Attorney	09/04/2025
	** 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 transaction did ISBA director Sarah R. Opperman report on Form 4?

She acquired 52 common shares of Isabella Bank Corp on 09/02/2025 at $33.13 per share.

How many ISBA shares does Sarah R. Opperman beneficially own after the transaction?

24,046.1037 shares are reported as beneficially owned following the reported acquisition.

Were any derivatives or option exercises reported in this ISBA Form 4?

No derivative securities, options, or convertible instruments are reported in Table II of the filing.

What is the stated reason for the share acquisition in the ISBA filing?

The filing notes the shares include amounts acquired through the issuer's quarterly dividend reinvestment plan.

Who signed the Form 4 for Sarah R. Opperman and when?

Signed by Jerome E. Schwind by power of attorney on 09/04/2025.