CoastalSouth Bancshares (COSO) director granted 987 restricted stock units

Rhea-AI Filing Summary

CoastalSouth Bancshares, Inc. director Mark Griffith reported an equity award of restricted stock units. On 02/11/2026, he acquired 987 restricted stock units (RSUs) at a stated price of $0.00 per unit as a grant or award, held as direct beneficial ownership.

The RSUs convert into common shares of CoastalSouth Bancshares on a one-for-one basis, meaning each unit represents one future share of common stock. The award is scheduled to vest 100% on 12/31/2026, at which point the underlying shares become deliverable subject to any applicable plan terms.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider GRIFFITH MARK

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	987	$0.00	--

Holdings After Transaction: Restricted Stock Units — 987 shares (Direct)

Footnotes (1)

1. Restricted stock units ("RSU") convert into shares of the issuer's common stock on a one-for-one basis. RSU 100% vests on 12/31/2026.

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^*

GRIFFITH MARK

(Last) (First) (Middle)

400 GALLERIA PARKWAY

SUITE 1900

(Street)

ATLANTA GA 30339

(City) (State) (Zip)

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

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

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

3. Date of Earliest Transaction (Month/Day/Year)
02/11/2026

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

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

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

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

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
Restricted Stock Units	(1)	02/11/2026		A		987		12/31/2026(2)	12/31/2026(2)	Common Stock	987	(1)	987	D

Explanation of Responses:

1. Restricted stock units ("RSU") convert into shares of the issuer's common stock on a one-for-one basis.

2. RSU 100% vests on 12/31/2026.

	/s/ Lauren Hemby, Chief Accouting Officer	02/13/2026
	** 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.

FAQ

What insider transaction did CoastalSouth Bancshares (COSO) report for Mark Griffith?

CoastalSouth Bancshares reported that director Mark Griffith received 987 restricted stock units as an equity award. The grant was recorded on February 11, 2026, and represents direct beneficial ownership that can convert into an equal number of common shares upon vesting.

How many restricted stock units did the CoastalSouth Bancshares director receive on this Form 4?

The director received 987 restricted stock units in this transaction. These units are a form of stock-based compensation that convert one-for-one into CoastalSouth Bancshares common stock once the vesting conditions are satisfied under the company’s equity incentive arrangements.

When do Mark Griffith’s restricted stock units in CoastalSouth Bancshares (COSO) vest?

The restricted stock units granted to Mark Griffith are scheduled to vest 100% on December 31, 2026. After this vesting date, the RSUs convert into shares of CoastalSouth Bancshares common stock, subject to the company’s equity plan and any applicable transfer or holding restrictions.

Are the CoastalSouth Bancshares (COSO) RSUs an open-market purchase by the director?

No, the 987 restricted stock units are a grant or award, not an open-market purchase. The Form 4 uses transaction code “A” for acquisition, indicating stock-based compensation issued at a stated price of zero rather than shares bought on the public market.

What does one-for-one conversion mean for CoastalSouth Bancshares RSUs reported here?

One-for-one conversion means each restricted stock unit turns into one share of CoastalSouth Bancshares common stock. When the 987 RSUs vest on December 31, 2026, they can deliver 987 common shares to the director, assuming all plan conditions are fully satisfied.

How did this RSU grant affect Mark Griffith’s beneficial ownership in CoastalSouth Bancshares?

After the grant, Mark Griffith beneficially owned 987 restricted stock units directly. These units represent a future claim on 987 shares of common stock, contingent on vesting, and are disclosed to show his evolving equity-based stake in CoastalSouth Bancshares.