MARK GRIFFITH - 01 Jul 2025 Form 3 Insider Report for CoastalSouth Bancshares, Inc.

Role: Director
Signature: /s/ Morgan Guerts, Attorney-in-Fact
Issuer symbol: COSO on NYSE
Transactions as of: 01 Jul 2025
Net transactions value: $0
Form type: 3
Filing time: 01 Jul 2025, 19:12:37 UTC
Next filing: 13 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
GRIFFITH MARK	Director	400 GALLERIA PARKWAY, SUITE 1900, ATLANTA	/s/ Morgan Guerts, Attorney-in-Fact	01 Jul 2025	0001049458

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	COSO	Common Stock						37,179	01 Jul 2025	Direct
holding	COSO	Common Stock						16,750	01 Jul 2025	By trust	F1
holding	COSO	Common Stock						35,865	01 Jul 2025	By trust	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	These shares are held by the Patricia Ann Griffith Revocable Trust, of which the reporting person's spouse is trustee.
F2	These shares are held by the Griffith Family Trust, of which the reporting person's spouse is trustee.

Remarks:

Exhibit 24 - Power of Attorney