[Form 3] ISABELLA BANK CORP Initial Statement of Beneficial Ownership

Rhea-AI Filing Summary

Isabella Bank Corp (ISBA) filed a Form 3 reporting a director’s initial beneficial ownership. The filing lists 0 common shares beneficially owned, held directly, as of 10/06/2025.

No derivative securities were reported. The form indicates it was filed by one reporting person.

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Tessin Brian B

(Last) (First) (Middle)

401 N MAIN ST.

(Street)

MT PLEASANT MI 48858

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
10/06/2025

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

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

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

5. 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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
common	0	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

	/s/ Jennifer L. Gill, By Power of Attorney	10/17/2025
	** 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 5 (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) disclose in this Form 3?

A director’s initial beneficial ownership, showing 0 common shares held directly.

What is the event date on the ISBA Form 3?

The event date is 10/06/2025.

Does the ISBA Form 3 report any derivative securities?

No. No derivative securities were reported.

What is the reporting person’s relationship to Isabella Bank Corp?

The reporting person is a Director.

How many reporting persons are included in this ISBA Form 3?

It is filed by one reporting person.

What does Form 3 represent under Section 16?

Form 3 is the initial statement of beneficial ownership for insiders under Section 16.