Isabella Bank (ISBA) director adds to stake with small share buy

Rhea-AI Filing Summary

ISABELLA BANK CORP director Jill Bourland reported a purchase of company stock. On 2026-08-17, she bought 7.2133 shares of common stock in a purchase categorized as an open market or private transaction at $41.59 per share. After this transaction, her direct holdings total 5,899.2943 shares of ISBA common stock.

Insider Trade Summary

Net Buyer: 7.2133 shares

Net Buy 1 txn

Insider Bourland Jill

Role Director

Bought 7.2133 shs ($300.00)

Type	Security	Shares	Price	Value
Purchase	common	7.2133	$41.59	$300.00

Holdings After Transaction: common — 5,899.2943 shares (Direct)

Key Figures

Shares purchased: 7.2133 shares Purchase price: $41.59 per share Shares owned after transaction: 5,899.2943 shares +1 more

4 metrics

Shares purchased 7.2133 shares Non-derivative common stock purchase on 2026-08-17

Purchase price $41.59 per share Per-share price for the 2026-08-17 common stock purchase

Shares owned after transaction 5,899.2943 shares Direct ownership following the reported purchase

Net buy shares 7.2133 shares Net buy-sell direction in this Form 4

Key Terms

non-derivative, open market or private transaction, direct ownership

3 terms

non-derivative financial

"The transaction is classified as non-derivative common stock."

open market or private transaction financial

"Transaction code description notes a purchase in open market or private transaction."

direct ownership financial

"Ownership type for the reported shares is marked as direct."

FAQ

What insider transaction did ISBA director Jill Bourland report?

Jill Bourland reported a purchase of 7.2133 ISBA common shares on 2026-08-17. The transaction was coded as a purchase in an open market or private transaction at $41.59 per share.

At what price did Jill Bourland buy ISBA (ISBA) shares?

She bought ISBA common stock at $41.59 per share on 2026-08-17. The filing notes this as a per-share price for a non-derivative open market or private purchase transaction.

How many ISBA shares does Jill Bourland own after this Form 4 transaction?

Following the reported transaction, Jill Bourland directly owns 5,899.2943 ISBA common shares. This total reflects her position after purchasing 7.2133 additional non-derivative shares on 2026-08-17.

Was the August 17, 2026 ISBA insider trade by Jill Bourland a buy or a sell?

The August 17, 2026 transaction was a buy of ISBA shares. It is coded as a purchase of non-derivative common stock, increasing her holdings by 7.2133 shares to 5,899.2943 shares.

Did the Jill Bourland ISBA Form 4 involve derivatives or only common stock?

The Form 4 reports only non-derivative common stock transactions. There are no derivative transactions listed, and the derivative position summary for this filing is empty.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/17/2026 - 03:47 PM Accepted by SEC EDGAR 08/17/2026 - 03:46 PM Learn about SEC filing 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
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^*

Bourland Jill

(Last) (First) (Middle)

619 S. MISSION ST.

(Street)

MOUNT PLEASANT MICHIGAN 48858

(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)
08/17/2026

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	08/17/2026		P		7.2133	A	$41.59	5,899.2943	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	08/17/2026
	** 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)