Solid Biosciences grants 54,925 RSUs to executive

Solid Biosciences Inc. reported that Chief Regulatory Officer Jessie Hanrahan acquired 54,925 restricted stock units (RSUs) as a compensation grant.

Rhea-AI Filing Summary

Solid Biosciences Inc. reported that Chief Regulatory Officer Jessie Hanrahan acquired 54,925 restricted stock units (RSUs) as a compensation grant. Each RSU represents a contingent right to receive one share of Solid Biosciences common stock.

These RSUs relate to performance stock units (PSUs) granted on June 11, 2024. The PSUs vest in four 25% tranches upon achieving independent, Board‑determined performance milestones that are non‑market and non‑financial. The Board determined that the second performance milestone was met on January 29, 2026, and the related shares will vest subject to continued service through an evaluation date anticipated in the first quarter of 2027.

Insider Trade Summary 10b5-1

Grant/Award: 54,925 shares

Grant/Award 1 txn

Insider Hanrahan Jessie

Role Chief Regulatory Officer

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	54,925	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 54,925 contracts (Direct)

Footnotes (2)

1. F1. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock (the "RSUs").
2. F2. Performance stock units ("PSUs") were granted on June 11, 2024, and provide for the vesting of 25% of the target number of underlying RSUs granted upon the achievement of each of four independent performance milestones predetermined by the Board ("Performance Milestones"). The Performance Milestones are tied to the achievement of certain business objectives, as certified by the Board on specified evaluation dates, and are non-market and non-financial in nature. The performance criteria specified for the second Performance Milestone was determined by the Board to be met on January 29, 2026, and the shares related to such Performance Milestone will vest subject to the grantee's continued service with the Company on the Evaluation Date, which is anticipated to occur in the first quarter of 2027.

Key Figures

RSUs granted: 54,925 units RSUs per PSU milestone: 25% tranches PSU grant date: June 11, 2024 +3 more

6 metrics

RSUs granted 54,925 units Restricted stock units granted to Chief Regulatory Officer on January 29, 2026

RSUs per PSU milestone 25% tranches Each of four independent performance milestones vests 25% of target RSUs

PSU grant date June 11, 2024 Original performance stock units grant establishing four performance milestones

Second milestone achievement date January 29, 2026 Board determined second performance milestone criteria were met

Expected vesting timing Q1 2027 Shares related to second performance milestone vest, subject to continued service

Post-grant RSU holdings 54,925 units Total RSUs held by Jessie Hanrahan following the transaction

Key Terms

Restricted Stock Units, Performance stock units, Performance Milestones, non-market and non-financial, +1 more

5 terms

Restricted Stock Units financial

"Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Performance stock units financial

"Performance stock units ("PSUs") were granted on June 11, 2024, and provide for the vesting of 25% of the target number"

Performance stock units are a type of company award that grants employees shares of stock only if certain performance goals are met. They motivate employees to work toward specific company achievements, aligning their interests with those of shareholders. For investors, they can influence a company's future stock supply and reflect management’s confidence in reaching key targets.

Performance Milestones financial

"upon the achievement of each of four independent performance milestones predetermined by the Board ("Performance Milestones")"

non-market and non-financial financial

"The Performance Milestones are tied to the achievement of certain business objectives ... and are non-market and non-financial in nature."

contingent right financial

"Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock"

FAQ

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

What insider transaction did Solid Biosciences (SLDB) report for Jessie Hanrahan?

Solid Biosciences reported that Chief Regulatory Officer Jessie Hanrahan received 54,925 restricted stock units as a compensation grant. These units were tied to performance stock units whose second performance milestone was certified as achieved by the Board on January 29, 2026.

How many RSUs did Jessie Hanrahan receive from Solid Biosciences (SLDB)?

Jessie Hanrahan received 54,925 restricted stock units from Solid Biosciences. Each RSU represents a contingent right to receive one share of the company’s common stock, bringing Hanrahan’s total reported RSU holdings to 54,925 units after this grant.

What are the performance conditions for Solid Biosciences (SLDB) PSUs granted to Jessie Hanrahan?

The performance stock units were granted June 11, 2024 and vest in four 25% tranches upon achieving independent Board‑set performance milestones. These milestones are based on non‑market, non‑financial business objectives certified by the Board on specified evaluation dates.

When was the second performance milestone for Solid Biosciences (SLDB) PSUs achieved?

The Board determined that the second performance milestone was achieved on January 29, 2026. Shares related to this milestone will vest only if the grantee continues serving the company through the evaluation date, anticipated in the first quarter of 2027.

When are the newly earned Solid Biosciences (SLDB) RSUs expected to vest?

The RSUs tied to the second performance milestone are expected to vest in the first quarter of 2027. Vesting is contingent on the grantee’s continued service with Solid Biosciences through the Board‑specified evaluation date within that period.

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

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Accepted by SEC EDGAR 04/21/2026 - 04:05 PM Learn about SEC filing dates

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

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

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^*

Hanrahan Jessie

(Last) (First) (Middle)

C/O SOLID BIOSCIENCES INC.

500 RUTHERFORD AVENUE, THIRD FLOOR

(Street)

CHARLESTOWN MASSACHUSETTS 02129

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Solid Biosciences Inc. [ SLDB ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Regulatory Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
01/29/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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)	01/29/2026		A		54,925		(2)	(2)	Common Stock	54,925	$0.00	54,925	D

Explanation of Responses:

1. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock (the "RSUs").

2. Performance stock units ("PSUs") were granted on June 11, 2024, and provide for the vesting of 25% of the target number of underlying RSUs granted upon the achievement of each of four independent performance milestones predetermined by the Board ("Performance Milestones"). The Performance Milestones are tied to the achievement of certain business objectives, as certified by the Board on specified evaluation dates, and are non-market and non-financial in nature. The performance criteria specified for the second Performance Milestone was determined by the Board to be met on January 29, 2026, and the shares related to such Performance Milestone will vest subject to the grantee's continued service with the Company on the Evaluation Date, which is anticipated to occur in the first quarter of 2027.

	/s/ Kimberly Cornwell as attorney-in-fact for Jessie Hanrahan	04/21/2026
	** 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).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)