CoastalSouth officer plans $27.9K stock sale

CoastalSouth Bancshares, Inc. (COSO) received a Rule 144 notice indicating that officer Ernst W. Bruderer, through Raymond James & Associates, intends to sell 1,000 shares of common stock on the NYSE.

Rhea-AI Filing Summary

CoastalSouth Bancshares, Inc. (COSO) received a Rule 144 notice indicating that officer Ernst W. Bruderer, through Raymond James & Associates, intends to sell 1,000 shares of common stock on the NYSE. The shares were acquired via an IPO purchase on July 2, 2025 for cash.

The filing lists an aggregate market value for the planned sale of $27,888.00 and reports that 11,954,446 shares of common stock were outstanding as of August 18, 2026. It also discloses a prior sale of 1,000 shares on August 10, 2026 for $27,563.00.

Key Figures

Shares to be sold: 1,000 shares of common stock Aggregate market value of securities to be sold: $27,888.00 Shares outstanding: 11,954,446 shares +3 more

6 metrics

Shares to be sold 1,000 shares of common stock Proposed sale under Rule 144 through Raymond James & Associates

Aggregate market value of securities to be sold $27,888.00 Listed for the 1,000 shares of common stock to be sold

Shares outstanding 11,954,446 shares Common stock outstanding as of August 18, 2026

Prior sale amount 1,000 shares Common shares sold on August 10, 2026

Proceeds from prior sale $27,563.00 Aggregate amount for 1,000 shares sold on August 10, 2026

Acquisition date of shares July 2, 2025 Date the 1,000 shares were acquired via IPO purchase for cash

Key Terms

Rule 144, IPO purchase, attorney-in-fact

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

IPO purchase financial

"Common | 07/02/2025 | IPO purchase | Issuer"

attorney-in-fact regulatory

"as attorney-in-fact for Ernst W Bruderer"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

FAQ

What does the Form 144 filing disclose for CoastalSouth Bancshares, Inc. (COSO)?

The filing discloses that officer Ernst W. Bruderer, through Raymond James & Associates, intends to sell 1,000 shares of CoastalSouth Bancshares, Inc. common stock under Rule 144 on the NYSE, with an aggregate market value listed as $27,888.00.

How many COSO shares are proposed to be sold under this Form 144?

The notice covers a proposed sale of 1,000 shares of CoastalSouth Bancshares, Inc. common stock. These shares were acquired via an IPO purchase on July 2, 2025 for cash and are to be sold through Raymond James & Associates.

What prior COSO share sales by Ernst W. Bruderer are reported in the Form 144?

The filing reports that on August 10, 2026, 1,000 shares of CoastalSouth Bancshares, Inc. common stock were sold for $27,563.00. This disclosure covers securities sold during the past three months, as required in the Form 144 notice.

How many CoastalSouth Bancshares, Inc. (COSO) shares were outstanding as of the referenced date?

The Form 144 lists 11,954,446 shares of CoastalSouth Bancshares, Inc. common stock outstanding as of August 18, 2026. This figure provides context for the relative size of the proposed 1,000-share sale under Rule 144.

Who is executing the planned COSO share sale and in what capacity?

The planned sale is to be executed through Raymond James & Associates, Inc.. The Form 144 is signed by Rashida Mitchell as duly authorized representative of Raymond James & Associates, acting as attorney-in-fact for Ernst W. Bruderer.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/24/2026 - 02:18 PM Accepted by SEC EDGAR 08/24/2026 - 02:17 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0002067397
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	CoastalSouth Bancshares, Inc.
SEC File Number	001-42730
Address of Issuer	400 GALLERIA PKWY SUITE 1900 ATLANTA GEORGIA 30339
Phone	678-396-4605
Name of Person for Whose Account the Securities are To Be Sold	Bruderer Ernst W.
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Raymond James and Associates 880 Carillon Parkway St. Petersburg FL 33716	1000	27888.00	11954446	08/18/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	07/02/2025	IPO purchase	Issuer			1000	07/02/2025	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Ernst W Bruderer c/o Coastal Sount Bancshares 400 GALLERIA PARKWAY, Suite 1900 Atlanta GA 30339	Common	08/10/2026	1000	27563.00

144: Remarks and Signature

Remarks
Date of Notice	08/24/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	Rashida Mitchell, as duly authorized representative of Raymond James & Associates, Inc., as attorney-in-fact for Ernst W Bruderer
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)