Coastalsouth Bancshares, Inc.

COSO·NYSE·$25.85Share Price as of 11/2·$311MMarket Cap as of 11/2

Financials

10-QQ2 ended 06/30/2608/07/26 10-QQ1 ended 03/31/2605/08/26 10-KFY 202503/12/26 10-QQ3 ended 09/30/2511/07/25 10-QQ2 ended 06/30/2508/11/25

Disclosures

8-KCurrent report10/19/26 8-KCurrent report07/24/26 8-KCurrent report07/20/26 8-KCurrent report05/01/26 8-KCurrent report04/24/26

Prospectuses and Registrations

S-8Registration of securities for employees03/12/26 S-8Registration of securities for employees07/03/25 424B4Prospectus07/02/25 FWPFree writing prospectus06/24/25 S-1/ARegistration statement (amended)06/24/25

Proxies

DEF 14ADefinitive proxy03/13/26 DEFA14AAdditional proxy materials03/13/26

Ownership

Form 4Insider transaction10/26/26 144Proposed sale of securities10/23/26 Form 4Insider transaction09/14/26 144Proposed sale of securities08/31/26 Form 4Insider transaction08/31/26

Other

ARSAnnual report to shareholders03/13/26 8-A12B8-A12B07/01/25 CERTCEO/CFO certification07/01/25 EFFECTRequest for effectiveness07/01/25 CORRESPCorrespondence with the SEC06/30/25