CoastalSouth (COSO) director receives grant of 868 restricted stock units

Rhea-AI Filing Summary

Bruderer Ernst W. reported acquisition or exercise transactions in this Form 4 filing.

CoastalSouth Bancshares director granted RSUs

CoastalSouth Bancshares, Inc. director Ernst W. Bruderer received an equity award of 868 restricted stock units on 02/11/2026. These RSUs are a right to receive 868 shares of common stock on a one-for-one basis once they vest.

The RSUs are scheduled to 100% vest on 12/31/2026, aligning Bruderer’s compensation with future company performance. Following this grant, he directly holds 868 derivative securities in the form of restricted stock units.

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

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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^*

Bruderer Ernst W.

(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		868		12/31/2026(2)	12/31/2026(2)	Common Stock	868	(1)	868	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).
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FAQ

What insider transaction did CoastalSouth Bancshares (COSO) report on this Form 4?

CoastalSouth Bancshares reported that director Ernst W. Bruderer received a grant of 868 restricted stock units on 02/11/2026. This is an equity award, not an open-market stock purchase or sale, and is recorded as a derivative security acquisition.

How many restricted stock units were granted to director Ernst W. Bruderer at COSO?

Ernst W. Bruderer was granted 868 restricted stock units. Each unit represents the right to receive one share of CoastalSouth Bancshares common stock, subject to vesting conditions, providing stock-based compensation that can align his interests with other shareholders over time.

When do Ernst W. Bruderer’s CoastalSouth Bancshares RSUs vest?

The 868 restricted stock units granted to Ernst W. Bruderer are scheduled to 100% vest on 12/31/2026. Vesting means the units become earned and convertible into common shares, assuming all applicable service or other conditions are satisfied by that date.

What is the conversion rate of the COSO restricted stock units granted to the director?

Each restricted stock unit converts into one share of CoastalSouth Bancshares common stock on a one-for-one basis. Once vested, the 868 RSUs would therefore entitle the director to receive 868 shares, reflecting standard equity compensation mechanics for this type of award.

Is the RSU grant to the COSO director classified as a purchase or sale of stock?

The RSU grant is classified as an acquisition of a derivative security, coded as a grant, award, or other acquisition. It is not an open-market stock purchase or sale, but a compensation-related equity award provided by CoastalSouth Bancshares to its director.

How many derivative securities does the COSO director own after this RSU grant?

After the reported transaction, Ernst W. Bruderer beneficially owns 868 derivative securities in the form of restricted stock units, held directly. This amount matches the size of the RSU grant and reflects his post-transaction derivative holdings reported in the Form 4 filing.