Solid Biosciences Inc.
SLDB • NASDAQ
Solid Biosciences Inc. is a biotechnology company in the healthcare sector on NASDAQ, led by Alexander (Bo) Cumbo, with a market cap of $457.3M. As of Q3 2025, 105% of shares are held by 128 institutional investors, with PERCEPTIVE ADVISORS LLC as the largest holder at 15.2%.
Chief Executive OfficerAlexander (Bo) Cumbo
Market Cap$457.3M
Biotechnology
Healthcare
Employees88.0
Websitesolidbio.com
Country
United States of America
Overview
Overview of institutional ownership in SLDB as of Q3 2025 with a market cap of $480.5M
All Institutions
- Institutions
- 128
- Value Held
- $502.7M
- Shares Held
- 81.5M
- Avg Position
- $3.9M
- Median Position
- $374.9K
Hedge Funds
- Hedge Funds
- 29
- Value Held
- $232.5M
- Shares Held
- 37.7M
- Avg Position
- $8.0M
- Median Position
- $3.4M
Ownership Breakdown
Based on market cap of $480.5M as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.
Biggest Investors
Institutions with the largest positions in SLDB as of Q3 2025
| Institution | Position Value |
|---|---|
 PERCEPTIVE ADVISORS LLC Hedge Fund•Long/Short | $73.0M 2.11% of portfolio |
B Bain Capital Life Sciences Investors, LLC Institution | $48.8M 3.24% of portfolio |
S Siren, L.L.C. Institution | $45.8M 1.92% of portfolio |
 RA CAPITAL MANAGEMENT, LLC Hedge Fund•Long/Short | $35.9M 0.45% of portfolio |
B BlackRock, Inc. Institution | $29.2M 0.00% of portfolio |
A ADAGE CAPITAL PARTNERS GP LLC Institution | $24.7M 0.04% of portfolio |
 VANGUARD GROUP INC Institution | $19.0M 0.00% of portfolio |
 Vestal Point Capital, LP Hedge Fund•Long/Short | $18.4M 0.93% of portfolio |
 FMR LLC Institution | $18.0M 0.00% of portfolio |
 CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy | $16.0M 0.01% of portfolio |
Net Capital Flow
Institutional buying and selling activity for SLDB in Q3 2025
- Traded
- −$704.5K
- Buyers
- 65
- Sellers
- 49
- Total Bought
- +$42.0M
- Total Sold
- −$42.7M
- Avg Position
- $3.6M
Biggest Buyers
| Institution | Net Bought |
|---|---|
Vestal Point Capital, LP Hedge Fund•Long/Short | +$9.1M +1.5M shares |
 Boxer Capital Management, LLC Hedge Fund•Long/Short | +$3.7M +600.0K shares |
 ARMISTICE CAPITAL, LLC Hedge Fund•Long/Short | +$3.3M +536.0K shares |
 RENAISSANCE TECHNOLOGIES LLC Hedge Fund•Quant | +$2.9M +463.7K shares |
 PANAGORA ASSET MANAGEMENT INC Hedge Fund•Quant | +$2.5M +397.2K shares |
 Parkman Healthcare Partners LLC Hedge Fund•Long/Short | +$2.4M +396.4K shares |
 GOLDMAN SACHS GROUP INC Institution | +$1.8M +294.9K shares |
 BALYASNY ASSET MANAGEMENT LLC Hedge Fund•Multi-Strategy | +$1.5M +245.5K shares |
 DIMENSIONAL FUND ADVISORS LP Long Only Manager | +$1.4M +221.2K shares |
 SECTORAL ASSET MANAGEMENT INC Venture Capital | +$1.3M +211.5K shares |
Biggest Sellers
| Institution | Net Sold |
|---|---|
A ADAGE CAPITAL PARTNERS GP LLC Institution | −$16.8M −2.7M shares |
 Monashee Investment Management LLC Hedge Fund•Sector | −$10.5M −2.2M shares |
B Bollard Group LLC Family Office | −$1.8M −361.7K shares |
VANGUARD GROUP INC Institution | −$1.7M −281.7K shares |
FMR LLC Institution | −$1.6M −264.3K shares |
 GEODE CAPITAL MANAGEMENT LLC ETF Provider | −$1.4M −222.9K shares |
B BlackRock, Inc. Institution | −$1.2M −195.0K shares |
 MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy | −$1.2M −189.7K shares |
 Ally Bridge Group LLC Hedge Fund•Sector | −$1.1M −174.8K shares |
B BLAIR WILLIAM & CO/IL Institution | −$807.0K −165.7K shares |
Entry and Exit Activity
Institutions that initiated new positions or completely exited SLDB in Q3 2025
- New Positions
- 10
- New Value
- $3.5M
- Exited Positions
- 12
- Exited Value
- $14.5M
New Positions
| Institution | Position Value |
|---|---|
Parkman Healthcare Partners LLC Hedge Fund•Long/Short | $2.4M 396.4K shares |
S Skopos Labs, Inc. RIA/Wealth | $614.4K 99.6K shares |
A AXQ CAPITAL, LP Hedge Fund•Market Neutral | $148.3K 24.0K shares |
P Polymer Capital Management LLC Hedge Fund•Multi-Strategy | $94.2K 15.3K shares |
 Farther Finance Advisors, LLC RIA/Wealth | $70.9K 11.5K shares |
 COMMONWEALTH EQUITY SERVICES, LLC. RIA/Wealth | $67.0K 10.9K shares |
 SRS Capital Advisors, Inc. RIA/Wealth | $56.8K 9.2K shares |
O Optiver Holding B.V. Institution | $2.5K 412.0 shares |
B BRYN MAWR TRUST CO/PA Institution | $993.0 161.0 shares |
 Rockefeller Capital Management L.P. Long Only Manager | $617.0 100.0 shares |
Exited Positions
| Institution | Previous Position |
|---|---|
Monashee Investment Management LLC Hedge Fund•Sector | $10.5M 2.2M shares |
B Bollard Group LLC Family Office | $1.8M 361.7K shares |
B BLAIR WILLIAM & CO/IL Institution | $807.0K 165.7K shares |
J Jump Financial, LLC Institution | $563.8K 115.8K shares |
S SPHERA FUNDS MANAGEMENT LTD. Institution | $244.4K 50.2K shares |
 Polar Securities Inc. Hedge Fund•Multi-Strategy | $211.8K 43.5K shares |
 WEALTHEDGE INVESTMENT ADVISORS, LLC RIA/Wealth | $150.3K 30.9K shares |
 Mariner Wealth Advisors, LLC RIA/Wealth | $94.5K 19.4K shares |
S SG Americas Securities, LLC Institution | $63.7K 13.1K shares |
 RAYMOND JAMES FINANCIAL INC RIA/Wealth | $13.8K 2.8K shares |
Options Activity
Institutions with the largest Call and Put options positions in SLDB as of Q3 2025
- Call Positions
- 5
- Call Value
- $4.2M
- Put Positions
- 2
- Put Value
- $244.9K
Call Positions
| Institution | Position Value |
|---|---|
 Ikarian Capital, LLC Hedge Fund•Event Driven | $2.9M 4.7K contracts |
 BOOTHBAY FUND MANAGEMENT, LLC Fund of Funds | $1.2M 1.9K contracts |
 SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity | $98.1K 159.0 contracts |
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy | $91.9K 149.0 contracts |
J JANE STREET GROUP, LLC Institution | - - contracts |
Put Positions
| Institution | Position Value |
|---|---|
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy | $143.8K 233.0 contracts |
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity | $101.2K 164.0 contracts |
Most Committed Institutions
Institutions with SLDB as the highest % of their portfolio as of Q3 2025
| Institution | Portfolio Weight |
|---|---|
B Bain Capital Life Sciences Investors, LLC Institution | 3.24% $48.8M |
Ally Bridge Group LLC Hedge Fund•Sector | 2.84% $3.4M |
SECTORAL ASSET MANAGEMENT INC Venture Capital | 2.45% $3.9M |
PERCEPTIVE ADVISORS LLC Hedge Fund•Long/Short | 2.11% $73.0M |
S Siren, L.L.C. Institution | 1.92% $45.8M |
 MPM Oncology Impact Management LP Institution | 1.65% $10.1M |
B Birchview Capital, LP Hedge Fund•Value | 1.41% $1.8M |
Boxer Capital Management, LLC Hedge Fund•Long/Short | 1.22% $3.7M |
R Redmile Group, LLC Hedge Fund•Sector | 1.14% $11.7M |
 Finepoint Capital LP Hedge Fund•Value | 1.09% $5.9M |
Hedge Fund Spotlight
Discover hedge funds investing in SLDB
Ikarian Capital, LLC
Hedge Fund • Event Driven
Portfolio ManagerNeil Tristan Shahrestani
- Portfolio Value
- $494.3M
- Positions
- 116
- Last Reported
- Q3 2025
Sector Allocation
Position in Solid Biosciences Inc.
- Market Value
- $1.1M
- Shares Held
- 176.7K
- Portfolio Weight
- 0.22%
- Owned Since
- 2024-Q3
| Top Holding | Sector | Market Value | Weight |
|---|---|---|---|
Unknown Unknown | $53.0M | 10.73% | |
Unknown Unknown | $33.4M | 6.76% | |
Biotechnology Healthcare | $27.2M | 5.49% |
