Solid Biosciences SLDB Insider Ownership

Updated Oct 10, 2026

Over the trailing 12 months, SLDB insiders sold $2.68 million worth of shares (427.62K shares) in open-market trades, with no open-market purchases.

• Behind Solid Biosciences' open-market sales in the past 12 months were 7 insiders, and no insider bought.
• Alexander Cumbo (President and CEO) was the top open-market seller of Solid Biosciences over the past 12 months, with $983,857 sold (156.62K shares) and the latest sale on February 18, 2026.
• Apart from open-market trades, SLDB insiders acquired 880.81K shares through option exercises and conversions in the past 12 months.
• Business Quant data puts insider holdings in SLDB at 26.26Mn shares across insiders' latest Form 4 filings, up 0.03% from 26.25Mn shares at the end of Q2 2026.
• By type of ownership, SLDB insiders hold 3.53% of their shares directly (925.73K shares) and 96.47% indirectly (25.34Mn shares).
• Business Quant counts 13 insiders with holdings in Solid Biosciences stock, among the officers, directors and 10% owners who have filed a Form 4 in the past two years.
• Solid Biosciences' top three insider holders by shares held are Perceptive Advisors LLC (Director and 10% owner, 11.83Mn shares), Bain Capital Life Sciences Investors, LLC (10% owner, 5.03Mn shares) and Adage Capital Management, L.P. (10% owner, 4.25Mn shares).
• The holding of Perceptive Advisors LLC makes up 45.06% of all shares held by Solid Biosciences insiders.
• Institutional holders reported 79.72% of Solid Biosciences' outstanding shares for Q2 2026; insiders' latest Form 4 filings put their stake at about 18.28%, and other investors, including the public, hold the remaining 2.00%.
• In the past year, 15 insiders of Solid Biosciences submitted 44 Form 4 filings reporting trades, awards or other transactions.
• The insider holdings and trades above for Solid Biosciences reflect Form 4 filings through October 6, 2026.