[Form 4] CoastalSouth Bancshares, Inc. Insider Trading Activity

Rhea-AI Filing Summary

CoastalSouth Bancshares CFO and COO Anthony P. Valduga reported several changes in his CoastalSouth Bancshares, Inc. holdings. He sold 4,558 shares of common stock in an open-market sale at $25.84 per share and made a bona fide gift of 2,000 shares. Following these transactions, he directly holds 86,115 common shares and indirectly holds 2,500 shares through a spouse IRA and 27,924 shares through his own IRA.

Insights

Equity ownership and insider-trading analyst

CFO logs modest open-market sale, gift, and retains sizable stake.

Anthony P. Valduga, CFO and COO of CoastalSouth Bancshares, Inc., reported an open-market sale of 4,558 common shares at $25.84 per share and a bona fide gift of 2,000 shares. These are the only explicit buy/sell-type movements in this filing.

After these transactions, he directly holds 86,115 common shares and indirectly holds 2,500 shares via a spouse IRA and 27,924 shares via his own IRA. Relative to his reported direct position, the share sale appears limited, and no derivative exercises or tax-withholding transactions are shown.

There is no indication here of a Rule 10b5-1 trading plan or other pre-arranged program in the provided data. Overall, the activity combines routine gifting with a single sale while maintaining a substantially larger continuing ownership position, so the informational signal is modest.

Insider Trade Summary

Net Seller: 4,558 shares ($117,779)

Net Sell 4 txns

Insider Valduga Anthony P.

Role CFO AND COO

Sold 4,558 shs ($118K)

Type	Security	Shares	Price	Value
Sale	Common Stock	4,558	$25.84	$118K
Gift	Common Stock	2,000	$0.00	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 86,115 shares (Direct, null); Common Stock — 27,924 shares (Indirect, By IRA)

Footnotes (1)

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Valduga Anthony P.

(Last) (First) (Middle)

400 GALLERIA PARKWAY

SUITE 1900

(Street)

ATLANTA GEORGIA 30339

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
CoastalSouth Bancshares, Inc. [ COSO ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CFO AND COO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/06/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/06/2026		S		4,558	D	$25.84	86,115	D
Common Stock	05/06/2026		G		2,000	D	$0	84,115	D
Common Stock								27,924	I	By IRA
Common Stock								2,500	I	By spouse IRA

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Lauren Hemby, Chief Accouting Officer	05/06/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)