Cumbo Alexander 4
4 · Solid Biosciences Inc. · Filed Feb 6, 2026
Research Summary
AI-generated summary of this filing
Solid Biosciences (SLDB) CEO Alexander Cumbo Sells 48,913 Shares
What Happened Alexander Cumbo, President, CEO and a director of Solid Biosciences (SLDB), disposed of 48,913 shares on Feb. 4, 2026 in an open-market/private sale. The reported weighted-average price was $6.44 per share (range $6.28–$6.60), for proceeds of approximately $315,093. This sale was a sell-to-cover to satisfy tax withholding following the vesting of previously granted restricted stock units, not an independent discretionary sale.
Key Details
- Transaction date: 2026-02-04; Form 4 filed 2026-02-06 (timely filing).
- Shares sold: 48,913; weighted-average price reported: $6.44; price range: $6.28–$6.60 (multiple trades).
- Reported value: ~$315,093.
- Reason/footnotes: Sale executed to cover withholding taxes after RSU vesting via a durable automatic sell-to-cover instruction (adopted Aug 18, 2024); sale not a discretionary trade (Footnote F1). Footnote F2 notes the weighted average and offers to provide per-price breakdown on request.
- Shares owned after transaction: not specified in the details provided.
Context This was a tax-withholding sale tied to vested RSUs (routine administrative transaction) rather than a market-timed bet on the company. Such sell-to-cover transactions are common and generally less informative about insider sentiment than outright open-market purchases.
Insider Transaction Report
- Sale
Common Stock
[F1][F2]2026-02-04$6.44/sh−48,913$315,093→ 222,018 total
Footnotes (2)
- [F1]This sale was made to cover withholding taxes following the vesting of previously granted restricted stock units pursuant to a durable automatic sale instruction letter adopted by Mr. Cumbo on August 18, 2024 effecting the sell-to-cover election. The sale does not represent a discretionary trade by Mr. Cumbo.
- [F2]The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.28 to $6.60, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (4) to this Form.