Solid Biosciences
SLDB
150 hedge funds and large institutions have $717M invested in Solid Biosciences in 2026 Q1 according to their latest regulatory filings, with 34 funds opening new positions, 55 increasing their positions, 40 reducing their positions, and 12 closing their positions.
183% more first-time investments, than exits
New positions opened: 34 | Existing positions closed: 12
96% more call options, than puts
Call options by funds: $2.2M | Put options by funds: $1.12M
56% more capital invested
Capital invested by funds: $459M → $717M (+$258M)
38% more repeat investments, than reductions
Existing positions increased: 55 | Existing positions reduced: 40
33% more funds holding in top 10
Funds holding in top 10: 3 → 4 (+1)
15% more funds holding
Funds holding: 130 → 150 (+20)
3.11% less ownership
Funds ownership: 104.45% → 101.34% (-3.1%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Janus Henderson Group
London,
|
+$25.8M |
| 2 |
DTC
Deep Track Capital
Greenwich,
Connecticut
|
+$22.9M |
| 3 |
RCM
RA Capital Management
Boston,
Massachusetts
|
+$22.7M |
| 4 |
Ameriprise
Minneapolis,
Minnesota
|
+$15.7M |
| 5 |
BCLSI
Bain Capital Life Sciences Investors
Boston,
Massachusetts
|
+$12.2M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
FC
Finepoint Capital
Boston,
Massachusetts
|
-$5.42M |
| 2 |
VPC
Vestal Point Capital
New York
|
-$5.24M |
| 3 |
UBS Group
Zurich,
Switzerland
|
-$5.22M |
| 4 |
NCM
Nantahala Capital Management
New Canaan,
Connecticut
|
-$2.82M |
| 5 |
Point72 Asset Management
Stamford,
Connecticut
|
-$2.35M |
SLDB Hedge Fund Activity: Q1 2026 in Review
150 of the 8,191 institutional investors tracked by Wall St. Rank reported a position in Solid Biosciences (SLDB) for Q1 2026, worth a combined $717M — up 56% from $459M a quarter earlier.
Buyers outnumbered sellers: 34 funds opened new SLDB positions and 12 closed out — a net gain of 22 holders — while 55 added to existing stakes and 40 trimmed.
The largest buyer was Janus Henderson Group, opening a new position worth an estimated $25.8M. The largest seller was Finepoint Capital, exiting entirely with an estimated $5.42M sold.
- 150 institutional investors held Solid Biosciences (SLDB) as of Q1 2026, up from 130 in Q4 2025.
- Funds reported $717M of Solid Biosciences stock for Q1 2026, up 56% quarter-over-quarter.
- 34 funds opened new Solid Biosciences positions in Q1 2026 and 12 closed out, a net change of +22 holders.
- The largest Solid Biosciences buyer in Q1 2026 was Janus Henderson Group, an estimated $25.8M added.
- The largest Solid Biosciences seller in Q1 2026 was Finepoint Capital, an estimated $5.42M sold.
Based on aggregated 13F filings for Q1 2026.