Isabella Bank Corporation

ISBA·NASDAQ·$41.59Share Price as of 11/2·$305MMarket Cap as of 11/2

Financials

10-QQ3 ended 09/30/2610/30/26 10-QQ2 ended 06/30/2608/10/26 10-QQ1 ended 03/31/2605/06/26 10-KFY 202503/13/26 10-QQ3 ended 09/30/2511/10/25

Disclosures

8-KCurrent report10/29/26 8-KCurrent report10/06/26 8-KCurrent report09/28/26 8-KCurrent report09/21/26 8-KCurrent report08/27/26

Prospectuses and Registrations

424B3Prospectus08/10/26 S-4/ARegistration (business combination, amended)08/06/26 S-4/ARegistration (business combination, amended)08/04/26 S-4Registration (business combination)07/24/26 424B5Prospectus supplement06/16/26

Proxies

DEF 14ADefinitive proxy03/23/26 DEF 14ADefinitive proxy03/25/25 DEF 14ADefinitive proxy03/25/24 DEF 14ADefinitive proxy03/27/23 DEF 14ADefinitive proxy03/25/22

Ownership

Form 4Insider transaction10/20/26 Form 4Insider transaction09/17/26 Form 4Insider transaction09/03/26 Form 4Insider transaction09/03/26 Form 4Insider transaction09/03/26

Other

EFFECTRequest for effectiveness08/06/26 42542506/18/26 42542506/15/26 42542506/12/26 42542506/12/26