# Filing Detail

Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0000842517-26-000069
Filing Date
2026-03-13
Accepted
2026-03-13 16:32:46
Documents
126
Period of Report
2025-12-31

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | 10-K | isba-20251231.htm iXBRL | 10-K | 5256682
2 | EX-21 | isba_20251231xkxex21.htm | EX-21 | 1311
3 | EX-23.1 | isba_20251231xkxex231.htm | EX-23.1 | 3571
4 | EX-23.2 | isba_20251231xkxex232.htm | EX-23.2 | 3593
5 | EX-31.1 | isba_20251231xkxex311.htm | EX-31.1 | 10584
6 | EX-31.2 | isba_20251231xkxex312.htm | EX-31.2 | 10578
7 | EX-32 | isba_20251231xkxex32.htm | EX-32 | 5962
| Complete submission text file | 0000842517-26-000069.txt |  | 26173852

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
8 | XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | isba-20251231.xsd | EX-101.SCH | 93778
9 | XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT | isba-20251231_cal.xml | EX-101.CAL | 160653
10 | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT | isba-20251231_def.xml | EX-101.DEF | 540261
11 | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT | isba-20251231_lab.xml | EX-101.LAB | 1206691
12 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT | isba-20251231_pre.xml | EX-101.PRE | 919920
128 | EXTRACTED XBRL INSTANCE DOCUMENT | isba-20251231_htm.xml | XML | 7046301

Mailing Address 401 NORTH MAIN STREET MT PLEASANT MI 48858
Business Address 401 NORTH MAIN STREET MT PLEASANT MI 48858 9897729471
ISABELLA BANK CORP (Filer) CIK: 0000842517 (see all company filings)

EIN.: 382830092 | State of Incorp.: MI | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 001-42639 | Film No.: 26752971
SIC: 6022 State Commercial Banks
(CF Office: 02 Finance)