CoastalSouth director proposes $167K share sale

The notice separately reports 11,954,446 CoastalSouth common shares outstanding, distinct from the 6,000 shares proposed for sale.

Rhea-AI Filing Summary

CoastalSouth Bancshares, Inc. (COSO) is the issuer in a notice covering director Ernst W. Bruderer’s proposed sale of 6,000 common shares through Raymond James & Associates, Inc. The listed aggregate market value is $167,340.00, with an approximate sale date of October 23, 2026. The notice also lists five prior common-share sales by Bruderer from August 10 through August 31, 2026.

Key Figures

Common shares proposed for sale: 6,000 shares Aggregate market value of proposed sale: $167,340.00 Shares outstanding: 11,954,446 shares +2 more

5 metrics

Common shares proposed for sale 6,000 shares Approximate sale date: October 23, 2026

Aggregate market value of proposed sale $167,340.00 Proposed sale of common shares

Shares outstanding 11,954,446 shares Reported in the securities information

Common shares sold 2,000 shares August 31, 2026; aggregate market value $54,856.00

Common shares sold 1,700 shares August 26, 2026; aggregate market value $46,752.00

Key Terms

Rule 144, aggregate market value, attorney-in-fact

3 terms

Rule 144 regulatory

"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

"Aggregate market value"

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

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many COSO shares is Ernst W. Bruderer proposing to sell?

Ernst W. Bruderer, a director, is listed as proposing to sell 6,000 COSO common shares through Raymond James & Associates, Inc., at an aggregate market value of $167,340.00. The approximate sale date is October 23, 2026.

What recent COSO share sales are listed for Ernst W. Bruderer?

The notice lists 2,000 shares sold on August 31, 2026, for an aggregate market value of $54,856.00; 1,700 and 300 shares on August 26, 2026, for $46,752.00 and $8,250.00; 1,000 shares on August 18, 2026, for $27,889.00; and 1,000 shares on August 10, 2026, for $27,564.00.

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

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Available on EDGAR 10/23/2026 - 03:36 PM EDT Accepted by SEC EDGAR 10/23/2026 - 03:35 PM EDT 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	Director

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 & Associates, Inc. 80 Carillon Parkway St. Petersburg FL 33716	6000	167340.00	11954446	10/23/2026	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	08/01/2023	Purchase	CoastalSouth Bank			1100	08/01/2003	cash
Common	02/02/2004	Purchase	CoastalSouth Bank			1100	02/02/2004	cash
Common	08/01/2005	Purchase	CoastalSouth Bank			1000	08/01/2005	cash
Common	08/01/2006	Purchase	CoastalSouth Bank			2800	08/01/2006	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 5 Elizabeth St Charleston SC 29403	Common	08/31/2026	2000	54856.00
Ernst Bruderer 5 Elizabeth St , Charleston SC 20403	Common	08/26/2026	1700	46752.00
Ernst Bruderer 5 Elizabeth St , Charleston SC 20403	Common	08/26/2026	300	8250.00
Ernst Bruderer 5 Elizabeth St Charleston SC 20403	Common	08/18/2026	1000	27889.00
Ernst Bruderer 5 Elizabeth St , Charleston SC 20403	Common	08/10/2026	1000	27564.00

144: Remarks and Signature

Remarks
Date of Notice	10/23/2026
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)