Solid Biosciences Inc.

SLDB

Exchange: Nasdaq
Industry: Biological Products, (No Diagnostic Substances)
SEC CIK: 0001707502

SEC filings (opens in a new tab)

No open-market purchases or sales by Solid Biosciences Inc. insiders were filed in the last 90 days; 157 institutions reported holding it in 13F filings for Q2 2026, worth $1.14B in total; no superinvestor holds it.

Q1 2026 vs. Q4 2025

How the institutions holding Solid Biosciences Inc. changed between Q4 2025 and Q1 2026.

All holders in Q1 2026 All holders in Q4 2025

13F holders of SLDB: Q4 2025 compared with Q1 2026
Measure	Q4 2025	Of which not filed for Q1 2026	Q1 2026	Change
Holders	132	2	150	+20
Shares	81.4M	3.49M	99.7M	+21.8M (+28.0%)
Value	$459.2M	$19.7M	$717.4M	+$278.0M (+63.2%)

2 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so the changes leave them out.

New holders (32)

Institutions that held Solid Biosciences Inc. at the end of Q1 2026 but not at the end of Q4 2025.

Institutions new to SLDB in Q1 2026
Institution	Shares	Value	% of portfolio
Janus Henderson Group PLC	4,010,695	$28.9M	0.01%
Deep Track Capital, LP	3,565,062	$25.7M	0.53%
Vanguard Capital Management LLC	2,674,624	$19.3M	0.00%
Ameriprise Financial Inc	2,438,849	$17.6M	0.00%
Blair William & Co	651,216	$4.69M	0.01%
Vanguard Portfolio Management LLC	338,630	$2.44M	0.00%
Vanguard Fiduciary Trust Co	325,979	$2.35M	0.00%
Moore Capital Management, LP	324,749	$2.34M	0.09%
J. Goldman & Co LP	284,467	$2.05M	0.09%
StemPoint Capital LP	195,403	$1.41M	0.27%
Trexquant Investment LP	123,906	$892.1K	0.01%
Algert Global LLC	72,654	$523.1K	0.01%
Virtu Financial LLC	59,739	$430.0K	0.02%
Los Angeles Capital Management LLC	37,420	$269.4K	0.00%
Vanguard Global Advisers, LLC	36,402	$262.1K	0.00%
CIBC Bancorp USA Inc.	33,569	$241.7K	0.00%
Gsa Capital Partners LLP	29,569	$213.0K	0.01%
Persistent Asset Partners Ltd	27,990	$201.5K	0.08%
Skopos Labs, Inc.	25,811	$185.8K	0.01%
SFMG, LLC	22,153	$159.5K	0.01%
Engineers Gate Manager LP	21,505	$154.8K	0.00%
Scientech Research LLC	20,409	$146.9K	0.12%
Mirabella Financial Services LLP	19,897	$143.3K	0.01%
Verdad Advisers, LP	14,879	$107.1K	0.12%
Brevan Howard Capital Management LP	14,524	$104.6K	0.00%
Hudson Bay Capital Management LP	12,650	$91.1K	0.00%
JustInvest LLC	11,103	$79.9K	0.00%
Sound Income Strategies, LLC	1,005	$7.42K	0.00%
Quantbot Technologies LP	1,000	$7.20K	0.00%
Fortitude Family Office, LLC	77	$554	0.00%
Keating Financial Advisory Services, Inc.	33	$238	0.00%
Twin Peaks Wealth Advisors, LLC	5	$36	0.00%

Sold out (12)

Institutions that held Solid Biosciences Inc. at the end of Q4 2025 and filed for Q1 2026 without it.

Institutions that sold out of SLDB in Q1 2026
Institution	Shares, Q4 2025	Value, Q4 2025
Finepoint Capital LP	961,251	$5.42M
Susquehanna Fundamental Investments, LLC	116,525	$657.2K
Y-Intercept (Hong Kong) Ltd	36,147	$203.9K
SG Americas Securities, LLC	20,876	$118.0K
Axq Capital, LP	20,647	$116.4K
Jain Global LLC	20,270	$114.3K
Commonwealth Equity Services, LLC	10,852	$61.2K
Group One Trading, L.P.	6,553	$37.0K
Acadian Asset Management LLC	4,952	$27.0K
Aquatic Capital Management LLC	3,710	$20.9K
Amalgamated Bank	1,852	$10.0K
Daiwa Securities Group Inc.	231	$1.00K

Not filed for Q1 2026 yet (2)

Institutions that held Solid Biosciences Inc. at the end of Q4 2025 and haven't filed a 13F for Q1 2026. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding SLDB in Q4 2025 that haven't filed for Q1 2026
Institution	Shares, Q4 2025	Value, Q4 2025
Vanguard Group Inc	3,454,959	$19.5M
CIBC Private Wealth Group, LLC	30,600	$172.6K