# EDGAR Filing Document

**Accession Number:** 0000842517
**File Stem:** 9999999995-26-001317
**Filing Date:** 2026-4
**Character Count:** 1570
**Document Hash:** df6e569842096c083a142766ec83cc10
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**9999999995-26-001317.hdr.sgml**: 20260424

**ACCESSION NUMBER**: 9999999995-26-001317

**CONFORMED SUBMISSION TYPE**: EFFECT

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260423

**DATE AS OF CHANGE**: 20260424

**EFFECTIVENESS DATE**: 20260423

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** ISABELLA BANK CORP
- **CENTRAL INDEX KEY:** 0000842517
- **STANDARD INDUSTRIAL CLASSIFICATION:** STATE COMMERCIAL BANKS [6022]
- **ORGANIZATION NAME:** 02 Finance
- **EIN:** 382830092
- **STATE OF INCORPORATION:** MI
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** EFFECT
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-295098
- **FILM NUMBER:** 26890291

**BUSINESS ADDRESS:**
- **STREET 1:** 401 NORTH MAIN STREET
- **CITY:** MT PLEASANT
- **STATE:** MI
- **ZIP:** 48858
- **BUSINESS PHONE:** 9897729471

**MAIL ADDRESS:**
- **STREET 1:** 401 NORTH MAIN STREET
- **CITY:** MT PLEASANT
- **STATE:** MI
- **ZIP:** 48858

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** ISABELLA BANK Corp
- **DATE OF NAME CHANGE:** 20170403

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** ISABELLA BANK CORP
- **DATE OF NAME CHANGE:** 20080602

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** IBT BANCORP INC /MI/
- **DATE OF NAME CHANGE:** 19920703

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

## Notice of Effectiveness

**Date:** April 23, 2026

**Time:** 16:00:00

**Form Type:** S-3

---

**CIK:** 0000842517

**Company Name:** ISABELLA BANK CORP

**File Number:** 333-295098