🕵️ Solid Biosciences Inc. ($SLDB)

SEC insider & ownership activity, last 12 months · CIK 1707502 · every row links its SEC filing

Over the last 12 months insiders sold $2.7M with no open-market buying against it. Cumbo Alexander sold $984K through a 10b5-1 trading plan in 4 lots (Dec–Feb). Joseph Edelman trimmed 15.6% → 12.9%; Perceptive Advisors LLC trimmed 15.6% → 12.9%. No red-flag 8-Ks in the window.

🚨 7 signals active — planned-vs-executed verdicts, pre-event flags, and cluster context live in the API and the alerts bot.
Aug 2025: net +$0 Sep 2025: net +$0 Oct 2025: net -$17K Nov 2025: net -$14K Dec 2025: net -$117K Jan 2026: net -$37K Mar 2026: net +$0 Mar 2026: net +$0 Apr 2026: net +$0 May 2026: net +$0 Jun 2026: net +$0 Jul 2026: net +$0
Monthly net open-market insider flow, last 12 months (up = net buying)

Insider flow

0 buyers, $0 (0 lots) · 7 sellers, $2.7M (29 lots)

InsiderBuysBoughtSellsSoldLast
Cumbo Alexander0 4$984KFeb 18, 2026
David T. Howton0 4$434KFeb 18, 2026
Tan Kevin0 4$330KFeb 18, 2026
Hanrahan Jessie0 4$297KFeb 18, 2026
Brooks Gabriel0 4$281KFeb 18, 2026
Herzich Paul0 4$274KFeb 18, 2026
Ganot Ilan0 5$82KFeb 18, 2026

5%+ holders

HolderStakeClassScheduleEvent
Joseph Edelman 12.9% 13DMar 9, 2026 filing ↗
Perceptive Advisors LLC 12.9% 13DMar 9, 2026 filing ↗
Perceptive Life Sciences Master Fund, Ltd. 12.8% 13DMar 9, 2026 filing ↗
RA Capital Management, L.P. 11.9% 13DJun 22, 2026 filing ↗
Peter Kolchinsky 11.9% 13DJun 22, 2026 filing ↗
Rajeev Shah 11.9% 13DJun 22, 2026 filing ↗
RA Capital Healthcare Fund, L.P. 11.8% 13DJun 22, 2026 filing ↗
Raymond Debbane 10.0% 13GMay 5, 2026 filing ↗
BCLS II Investco, LP 8.8% 13DMar 6, 2026 filing ↗
Invus Public Equities, L.P. 8.7% 13GMay 5, 2026 filing ↗
Invus Public Equities Advisors, LLC 8.7% 13GMay 5, 2026 filing ↗
Invus Global Management, LLC 8.7% 13GMay 5, 2026 filing ↗
Siren, L.L.C. 8.7% 13GMay 5, 2026 filing ↗
Commodore Capital LP 7.6% 13GFeb 25, 2025 filing ↗
Vestal Point Capital, LP 7.5% 13GFeb 17, 2026 filing ↗
Ryan Wilder 7.5% 13GFeb 17, 2026 filing ↗
BAIN Capital Life Sciences Opportunities IV, L.P. 5.4% 13DMar 6, 2026 filing ↗

Planned insider sales (Form 144)

SellerPlannedApprox. sale date
Brooks Gabriel$32KFeb 18, 2026 filing ↗
Cumbo Alexander$97KFeb 18, 2026 filing ↗
Hanrahan Jessie$24KFeb 18, 2026 filing ↗
Herzich Paul$21KFeb 18, 2026 filing ↗
Ganot Ilan$16KFeb 18, 2026 filing ↗
David T. Howton$43KFeb 18, 2026 filing ↗
Tan Kevin$31KFeb 18, 2026 filing ↗
Tan Kevin$95KFeb 4, 2026 filing ↗
Herzich Paul$70KFeb 4, 2026 filing ↗
Ganot Ilan$46KFeb 4, 2026 filing ↗
Cumbo Alexander$315KFeb 4, 2026 filing ↗
David T. Howton$122KFeb 4, 2026 filing ↗
Hanrahan Jessie$80KFeb 4, 2026 filing ↗
Brooks Gabriel$81KFeb 4, 2026 filing ↗
Hanrahan Jessie$171KFeb 2, 2026 filing ↗
Brooks Gabriel$182KFeb 2, 2026 filing ↗
Tan Kevin$173KFeb 2, 2026 filing ↗
Cumbo Alexander$517KFeb 2, 2026 filing ↗
David T. Howton$243KFeb 2, 2026 filing ↗
Herzich Paul$169KFeb 2, 2026 filing ↗
Tan Kevin$30KJan 13, 2026 filing ↗
Cumbo Alexander$55KDec 3, 2025 filing ↗

Material events (8-K)

ItemEvent date
Shareholder vote (5.07)Jun 10, 2026 filing ↗
Officer/director changes (5.02)Apr 10, 2026 filing ↗
Reg FD disclosure (7.01)Mar 11, 2026 filing ↗
Other events (8.01)Mar 11, 2026 filing ↗
Material agreement (1.01)Mar 6, 2026 filing ↗
Earnings (2.02)Mar 6, 2026 filing ↗
Unregistered equity sale (3.02)Mar 6, 2026 filing ↗
Other events (8.01)Mar 6, 2026 filing ↗
Financial Statements and Exhibits (9.01)Mar 6, 2026 filing ↗
Earnings (2.02)Nov 3, 2025 filing ↗
Reg FD disclosure (7.01)Nov 3, 2025 filing ↗
Other events (8.01)Nov 3, 2025 filing ↗
Financial Statements and Exhibits (9.01)Nov 3, 2025 filing ↗