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.

Q3 2025 vs. Q2 2025

How the institutions holding Solid Biosciences Inc. changed between Q2 2025 and Q3 2025.

All holders in Q3 2025 All holders in Q2 2025

13F holders of SLDB: Q2 2025 compared with Q3 2025
Measure	Q2 2025	Q3 2025	Change
Holders	116	129	+13
Shares	82.8M	81.9M	−940.4K (−1.1%)
Value	$403.4M	$505.2M	+$101.8M (+25.2%)

New holders (25)

Institutions that held Solid Biosciences Inc. at the end of Q3 2025 but not at the end of Q2 2025.

Institutions new to SLDB in Q3 2025
Institution	Shares	Value	% of portfolio
Boxer Capital Management, LLC	600,000	$3.70M	1.18%
Renaissance Technologies LLC	463,700	$2.86M	0.00%
Panagora Asset Management Inc	397,188	$2.45M	0.01%
Parkman Healthcare Partners LLC	396,396	$2.45M	0.27%
Ikarian Capital, LLC	176,690	$1.09M	0.25%
HRT Financial LP	156,822	$967.0K	0.00%
Jane Street Group, LLC	91,587	$565.1K	0.00%
Simplex Trading, LLC	84,001	$518.0K	0.01%
Trexquant Investment LP	70,448	$434.7K	0.00%
Boothbay Fund Management, LLC	69,080	$426.2K	0.01%
Schonfeld Strategic Advisors LLC	68,002	$419.6K	0.00%
Prudential Financial Inc	60,990	$376.3K	0.00%
State of Wisconsin Investment Board	46,998	$290.0K	0.00%
Axq Capital, LP	24,035	$148.3K	0.06%
Fox Run Management, L.L.C.	18,514	$114.2K	0.02%
Polymer Capital Management (US) LLC	15,264	$94.2K	0.01%
Farther Finance Advisors, LLC	11,497	$70.9K	0.00%
Commonwealth Equity Services, LLC	10,852	$67.0K	0.00%
SRS Capital Advisors, Inc.	9,200	$56.8K	0.00%
Group One Trading, L.P.	4,750	$29.3K	0.00%
Quadrant Capital Group LLC	431	$2.66K	0.00%
Optiver Holding B.V.	412	$2.54K	0.00%
Signaturefd, LLC	228	$1.41K	0.00%
Rockefeller Capital Management L.P.	100	$617	0.00%
GAMMA Investing LLC	96	$592	0.00%

Sold out (12)

Institutions that held Solid Biosciences Inc. at the end of Q2 2025 and filed for Q3 2025 without it.

Institutions that sold out of SLDB in Q3 2025
Institution	Shares, Q2 2025	Value, Q2 2025
Monashee Investment Management LLC	2,165,000	$10.5M
Bollard Group LLC	361,660	$1.76M
Blair William & Co	165,700	$807.0K
Jump Financial, LLC	115,762	$563.8K
Sphera Funds Management Ltd.	50,190	$244.4K
Polar Asset Management Partners Inc.	43,500	$211.8K
Wealthedge Investment Advisors, LLC	30,855	$150.3K
Mariner, LLC	19,414	$94.5K
SG Americas Securities, LLC	13,086	$64.0K
Raymond James Financial Inc	2,835	$13.8K
TD Waterhouse Canada Inc.	180	$827
Clearstead Advisors, LLC	9	$44