CoastalSouth investor plans $54.9K stock sale

CoastalSouth Bancshares, Inc. (COSO) is the issuer of common stock that Ernst W. Bruderer plans to sell under Rule 144.

Rhea-AI Filing Summary

CoastalSouth Bancshares, Inc. (COSO) is the issuer of common stock that Ernst W. Bruderer plans to sell under Rule 144. A broker, Raymond James & Associates, is listed for the sale of 2,000 common shares, with an aggregate market value of $54,856.46 and 11,954,446 shares outstanding, with an approximate sale date of August 31, 2026 on the NYSE.

The Form 144 notes that these 2,000 shares were originally purchased from the issuer on January 26, 2024 for cash. It also lists prior sales by Ernst Bruderer over the past three months, including multiple transactions in August 2026 involving blocks of 300 to 1,700 shares of CoastalSouth Bancshares common stock.

Key Figures

Shares to be sold under Rule 144: 2,000 shares of common stock Aggregate market value of shares to be sold: $54,856.46 Shares outstanding: 11,954,446 shares +4 more

7 metrics

Shares to be sold under Rule 144 2,000 shares of common stock Planned sale through Raymond James & Associates

Aggregate market value of shares to be sold $54,856.46 Value of 2,000 CoastalSouth Bancshares common shares in planned Rule 144 sale

Shares outstanding 11,954,446 shares Common shares outstanding for CoastalSouth Bancshares, Inc.

Approximate date of sale August 31, 2026 Planned date for Rule 144 sale of 2,000 shares

Prior sale on August 10, 2026 1,000 shares for $27,564.00 Sale of CoastalSouth Bancshares common stock by Ernst Bruderer

Prior sale on August 18, 2026 1,000 shares for $27,889.00 Sale of CoastalSouth Bancshares common stock by Ernst Bruderer

Prior sales on August 26, 2026 300 shares for $8,250.00 and 1,700 shares for $46,752.00 Multiple sales of CoastalSouth Bancshares common stock by Ernst Bruderer

Key Terms

Rule 144, aggregate market value, 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.

aggregate market value financial

"Common | Raymond James and Associates ... | 2000 | 54856.46 |"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

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 CoastalSouth Bancshares (COSO) disclose in this Form 144?

The notice states that Ernst W. Bruderer intends to sell 2,000 shares of CoastalSouth Bancshares common stock through Raymond James & Associates under Rule 144, with an aggregate market value of $54,856.46 and an approximate sale date of August 31, 2026.

How many CoastalSouth Bancshares (COSO) shares are covered by this planned Rule 144 sale?

The planned Rule 144 transaction covers 2,000 shares of CoastalSouth Bancshares, Inc. common stock. These shares were previously acquired by Ernst W. Bruderer on January 26, 2024 from the issuer for cash.

What is the aggregate market value of the COSO shares to be sold under Rule 144?

The filing states an aggregate market value of $54,856.46 for the 2,000 CoastalSouth Bancshares common shares that are planned to be sold through Raymond James & Associates under Rule 144.

How many CoastalSouth Bancshares (COSO) shares are outstanding according to this filing?

The Form 144 lists 11,954,446 shares of CoastalSouth Bancshares, Inc. common stock as outstanding in the same section that describes the 2,000 shares to be sold under Rule 144.

What prior COSO stock sales by Ernst Bruderer are disclosed in the last three months?

Disclosed prior sales include 1,000 shares on August 10, 2026 for $27,564.00, 1,000 shares on August 18, 2026 for $27,889.00, 300 shares on August 26, 2026 for $8,250.00, and 1,700 shares on August 26, 2026 for $46,752.00.

Who is executing the planned sale of COSO shares and under what authority?

The filing identifies Raymond James & Associates, Inc. as the broker. It is signed by Rashida Mitchell as a duly authorized representative of Raymond James & Associates, Inc., 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 08/31/2026 - 04:10 PM Accepted by SEC EDGAR 08/31/2026 - 04:09 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	2000	54856.46	11954446	08/31/2026	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	01/26/2024	Purchase	Issuer			2000	01/26/2024	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 Bruderer 15 Elizabeth St. Charleston SC 29403	Common	08/10/2026	1000	27564.00
Ernst Bruderer 15 Elizabeth St Charleston SC 29403	Common	08/18/2026	1000	27889.00
Ernst Bruderer 15 Elizabeth St , Charleston , SC 29403	Common	08/26/2026	300	8250.00
Ernst Bruderer 15 Elizabeth St Charleston SC 29405	Common	08/26/2026	1700	46752.00

144: Remarks and Signature

Remarks
Date of Notice	08/31/2026
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)