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)