HOWTON DAVID T

PrivateCIK: 1529297
Location

CAMBRIDGE, MA

HOWTON DAVID T (Chief Operating Officer) sold 13.0% of their position (4.93K shares) of SOLID BIOSCIENCES INC. on the open market

Open‑market sale worth $25.2K — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale
InsiderHOWTON DAVID TCIK 1529297
IssuerSOLID BIOSCIENCES INC.CIK 1707502
Officer· Chief Operating Officer
Since Feb 2026
-4.93K
Net shares
Net seller
$25.2K
Total sold
1
Open market trades
0B · 1S
3
Total transactions
13.05K acquired · 17.98K disposed
Non-Derivative Transactions2

Common Stock

Direct
M · Option Exercise

Shares

+13.05K

Price / share

Trade value

% of position

52.6%
12/2/2025
24.79K37.84K

Common Stock

Direct
S · Sale

Shares

4.93K

Price / share

$5.11

Trade value

$25.20K

% of position

13.0%
12/3/2025
37.84K32.91K
Total

Net shares

+8.12K

Net value

-$25.20K

Derivative Transactions1

Restricted Stock Units

Direct
M · Option Exercise
Converts to

Common Stock

13.05K shares

Shares

13.05K

Strike price

Held after

13.05K

Exercisable

12/2/2025
HOWTON DAVID T — Insider Transaction (Form 4) Filed Dec 4, 2025 | Finecho