Solid Biosciences SLDB Insider Ownership

NASDAQ SLDB

$7.09 +0.07 (+0.93%)

As of: Nov 10, 2026 · 2:22 PM EST

Insider Holdings by Owner

30.24Mn Shares

Advisors Llc Perceptive11.83Mn39.1%

Capital Life Sciences Investors, Llc Bain5.03Mn16.6%

Capital Management, L.P. Adage4.25Mn14.0%

Capital Management, L.P. Ra4.19Mn13.9%

Adam Koppel4.03Mn13.3%

Other insiders (12)898.63K3.0%

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

18.27%

▲+0.0024% pp QoQ

Shares Held by Insiders

26.26Mn

filed for Sep 2026

▲+0.01% QoQ

Shares Outstanding

143.69Mn

143,688,701 shares

Direct Holdings

922.29K

Indirect: 25.34Mn

Net Open-Market Trades

no open-market trades in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Open-Market Insider Trades

Bought Sold

Latest quarter —

Net over range —

Net-buying quarters —

Insider Ownership Summary

Updated Oct 27, 2026

Over the trailing 12 months, SLDB insiders sold $2.69 million worth of shares (429.1K 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.
The latest open-market trade on record is a sale of 4.37K shares for $24,582 by Gabriel Brooks (Chief Medical Officer) on October 19, 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 (927.94K 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 45 Form 4 filings reporting trades, awards or other transactions.
The insider holdings and trades above for Solid Biosciences reflect Form 4 filings through October 26, 2026.

Form 4 Holdings

Insiders Holding SLDB

Insiders 17

Shares held 30.24Mn

Of outstanding 21.05%

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	Advisors Llc Perceptive	Director, TenPercentOwner	0	11,833,539	11,833,539	39.1%	21 Feb, 2025
2	Capital Life Sciences Investors, Llc Bain	TenPercentOwner	0	5,034,582	5,034,582	16.6%	21 Feb, 2025
3	Capital Management, L.P. Adage	TenPercentOwner	0	4,248,084	4,248,084	14.0%	19 Feb, 2025
4	Capital Management, L.P. Ra	Director, TenPercentOwner	0	4,192,216	4,192,216	13.9%	12 Jan, 2024
5	Adam Koppel	Director, TenPercentOwner	0	4,034,582	4,034,582	13.3%	12 Jan, 2024
6	Alexander Cumbo	President And Ceo	235,405	0	235,405	0.8%	18 Feb, 2026
7	Ian F Smith	Director	141,585	0	141,585	0.5%	06 Oct, 2026
8	David T Howton	Chief Operating Officer	105,077	0	105,077	0.3%	18 Feb, 2026
9	Kevin Tan	Cfo Treasurer	99,422	0	99,422	0.3%	18 Feb, 2026
10	Gabriel Brooks	Chief Medical Officer	97,241	0	97,241	0.3%	20 Oct, 2026
11	Jessie Hanrahan	Chief Regulatory Officer	74,318	0	74,318	0.2%	18 Feb, 2026
12	Paul Herzich	Chief Technology Officer	72,638	0	72,638	0.2%	18 Feb, 2026
13	Ilan Ganot	Ceo President	0	27,474	27,474	0.1%	18 Feb, 2026
14	Carl Ashley Morris	Chief Scientific Officer	19,760	0	19,760	0.1%	31 Jan, 2023
15	Joel Solomon Zev Schneider	Chief Operating Officer	15,752	0	15,752	0.1%	15 Mar, 2022
16	Jennifer Marlowe	Cso	6,998	0	6,998	0.0%	05 Dec, 2023
17	Clare Kahn	Director	2,960	0	2,960	0.0%	13 Mar, 2025

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

595 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
01 Oct, 2026	Ilan Ganot	Director	Acquired A	150,000	$0.00	$0	150,000	Indirect
18 Oct, 2026	Gabriel Brooks	Chief Medical Officer	Acquired M	9,750	—	—	101,615	Direct
19 Oct, 2026	Gabriel Brooks	Chief Medical Officer	Disposed S	4,374	$5.62	$24.58K	97,241	Direct
18 Oct, 2026	Gabriel Brooks	Chief Medical Officer	Disposed M	9,750	$0.00	$0	9,750	Direct
02 Oct, 2026	Ian F Smith	Director	Acquired M	3,440	—	—	141,585	Direct
02 Oct, 2026	Ian F Smith	Director	Disposed M	3,440	$0.00	$0	3,440	Direct
02 Jul, 2026	Ian F Smith	Director	Acquired M	3,440	—	—	138,145	Direct
02 Jul, 2026	Ian F Smith	Director	Disposed M	3,440	$0.00	$0	6,880	Direct
10 Jun, 2026	Ian F Smith	Director	Acquired A	77,500	$0.00	$0	77,500	Direct
10 Jun, 2026	Clare Kahn	Director	Acquired A	77,500	$0.00	$0	77,500	Direct
10 Jun, 2026	Georgia Keresty	Director	Acquired A	77,500	$0.00	$0	77,500	Direct
10 Jun, 2026	Ilan Ganot	Director	Acquired A	77,500	$0.00	$0	77,500	Direct
10 Jun, 2026	Sukumar Nagendran	Director	Acquired A	77,500	$0.00	$0	77,500	Direct
10 Jun, 2026	Advisors Llc Perceptive	Director, TenPercentOwner	Acquired A	77,500	$0.00	$0	77,500	Indirect
10 Jun, 2026	Adam Leo Stone	Director	Acquired A	77,500	$0.00	$0	77,500	Direct
10 Jun, 2026	Martin I Freed	Director	Acquired A	77,500	$0.00	$0	77,500	Direct
10 Jun, 2026	Lynne Marie Sullivan	Director	Acquired A	77,500	$0.00	$0	77,500	Direct
02 Apr, 2026	Ian F Smith	Director	Acquired M	3,441	—	—	134,705	Direct
02 Apr, 2026	Ian F Smith	Director	Disposed M	3,441	$0.00	$0	10,320	Direct
09 Mar, 2026	Advisors Llc Perceptive	Director, TenPercentOwner	Acquired A	8,912,655	$5.61	$49.99Mn	8,912,655	Indirect

Showing 1 to 20 of 595 transactions