Cumbo sells SLDB shares (NASDAQ: SLDB) in multiple transactions

Rhea-AI Filing Summary

Cumbo Alexander filed a Form 144 reporting proposed sales of Common Stock. The notice lists three transactions: 12/03/2025 sale of 10,808 shares for $55,228.88, 02/02/2026 sale of 80,258 shares for $516,612.72, and 02/04/2026 sale of 48,913 shares for $315,079.69.

The excerpt also shows the settlement of 16,644 vested restricted stock units on 02/18/2026 reported as issuer compensation.

Insights

Securities Counsel

Form 144 lists proposed affiliate sales and an RSU settlement; filings are routine disclosure.

The filing records specific sale dates and exact share counts with proceeds, which are factual notices of transactions by an affiliate, not confirmations of completed market sales. The excerpt names Cumbo Alexander as the reporting party and lists per-transaction proceeds.

Timing and cash-flow settlement details beyond the listed dates are not provided in the excerpt; subsequent filings or trade reports would confirm execution and final settlement.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

Relationship to Issuer

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 Stock	ETRADE FINANCIAL CORPORATION 3 EDISON DRIVE ALPHARETTA GA 30005	16644	96923.01	83412695	02/18/2026	NASDAQ

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 Stock	02/18/2026	Settlement of vested restricted stock units	Issuer			16644	02/18/2026	Compensation

* 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
Cumbo Alexander C/O SOLID BIOSCIENCES INC. 500 Rutherford Ave Charlestown MA 02129	Common Stock	12/03/2025	10808	55228.88
Cumbo Alexander C/O SOLID BIOSCIENCES INC. 500 Rutherford Ave Charlestown MA 02129	Common Stock	02/02/2026	80258	516612.72
Cumbo Alexander C/O SOLID BIOSCIENCES INC. 500 Rutherford Ave Charlestown MA 02129	Common Stock	02/04/2026	48913	315079.69

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What Form 144 transactions did SLDB affiliate Cumbo Alexander report?

The filing lists three transactions: 10,808 shares on 12/03/2025 for $55,228.88, 80,258 shares on 02/02/2026 for $516,612.72, and 48,913 shares on 02/04/2026 for $315,079.69.

Did the filing disclose any RSU settlements for SLDB?

Yes. The excerpt shows the settlement of 16,644 vested restricted stock units on 02/18/2026, reported under issuer compensation in the provided content.

Does this Form 144 confirm trades executed in the market for SLDB?

The Form 144 lists proposed sales with dates and proceeds but does not itself confirm final market execution. Trade execution and settlement would be verified through subsequent trade reports or filings.

Who is identified as the reporting party in the SLDB excerpt?

The excerpt identifies Cumbo Alexander c/o Solid Biosciences Inc. as the reporting party associated with the listed common stock transactions and RSU settlement.