Isabella Bank (ISBA) director granted 43-share stock award

Rhea-AI Filing Summary

Opperman Sarah R reported acquisition or exercise transactions in this Form 4 filing.

Isabella Bank Corp director Sarah R. Opperman received a stock award of 43 common shares on June 1, 2026, at $41.49 per share. This grant is compensation-related rather than an open-market purchase and increases her direct holdings to 24,514.4997 common shares.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Opperman Sarah R

Role null

Type	Security	Shares	Price	Value
Grant/Award	common	43	$41.49	$2K

Holdings After Transaction: common — 24,514.5 shares (Direct, null)

Footnotes (1)

Key Figures

Shares granted: 43 common shares Grant price: $41.49 per share Shares held after transaction: 24,514.4997 common shares

3 metrics

Shares granted 43 common shares Stock award to director on June 1, 2026

Grant price $41.49 per share Value used for 43-share award

Shares held after transaction 24,514.4997 common shares Director’s direct holdings following the grant

Key Terms

Grant, award, or other acquisition, common, Form 4

3 terms

Grant, award, or other acquisition financial

"transaction_code_description: Grant, award, or other acquisition"

common financial

"security_title: common"

Form 4 regulatory

"INSIDER FILING DATA (Form 4):"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

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Form 4 Insider Transactions: What Each Field Means →

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
Estimated average burden
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 MICHIGAN 48640

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/01/2026

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

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

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

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	06/01/2026		A		43	A	$41.49	24,514.4997	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:

Remarks:

	/s/ Jennifer L. Gill, By Power of Attorney	06/03/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did ISBA director Sarah R. Opperman report?

Sarah R. Opperman reported receiving a grant of 43 Isabella Bank Corp common shares as compensation. The award was recorded at $41.49 per share and increased her direct holdings to 24,514.4997 common shares following the transaction on June 1, 2026.

Was the ISBA insider transaction a stock purchase or a grant?

The ISBA insider transaction was a stock grant, not an open-market purchase. Director Sarah R. Opperman received 43 common shares as a “grant, award, or other acquisition,” indicating compensation rather than discretionary buying in the market.

How many ISBA shares does Sarah R. Opperman hold after this Form 4?

After the reported transaction, Sarah R. Opperman directly holds 24,514.4997 Isabella Bank Corp common shares. This reflects the addition of 43 granted shares on June 1, 2026, and shows her ongoing equity stake as a member of the company’s board.

At what price was the ISBA stock award recorded for the director?

The stock award to director Sarah R. Opperman was recorded at $41.49 per Isabella Bank Corp common share. This price reflects the value used for the 43-share grant classified as a “grant, award, or other acquisition” of non-derivative common stock.

Does the ISBA Form 4 show any insider stock sales?

The Form 4 does not show any insider stock sales. It reports only an acquisition of 43 common shares by director Sarah R. Opperman classified as a grant or award, with no corresponding dispositions, gifts, tax withholdings, or derivative exercises.