SELLAS Life Sciences
160 hedge funds and large institutions have $228M invested in SELLAS Life Sciences in 2026 Q1 according to their latest regulatory filings, with 67 funds opening new positions, 53 increasing their positions, 18 reducing their positions, and 16 closing their positions.
806% more call options, than puts
Call options by funds: $102M | Put options by funds: $11.3M
319% more first-time investments, than exits
New positions opened: 67 | Existing positions closed: 16
194% more repeat investments, than reductions
Existing positions increased: 53 | Existing positions reduced: 18
71% more capital invested
Capital invested by funds: $134M → $228M (+$94.7M)
43% more funds holding
Funds holding: 112 → 160 (+48)
5.16% more ownership
Funds ownership: 24.89% → 30.05% (+5.2%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
State Street
Boston,
Massachusetts
|
+$27.8M |
| 2 |
BlackRock
New York
|
+$20.8M |
| 3 |
Jones Financial Companies
Des Peres,
Missouri
|
+$5.57M |
| 4 |
Geode Capital Management
Boston,
Massachusetts
|
+$3.74M |
| 5 |
UBS Group
Zurich,
Switzerland
|
+$3.12M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Millennium Management
New York
|
-$5.5M |
| 2 |
Two Sigma Investments
New York
|
-$3.04M |
| 3 |
Barclays
London,
United Kingdom
|
-$2.14M |
| 4 |
CS
Clear Street
New York
|
-$1.89M |
| 5 |
Nuveen
Charlotte,
North Carolina
|
-$1.58M |
SLS Hedge Fund Activity: Q1 2026 in Review
160 of the 8,191 institutional investors tracked by Wall St. Rank reported a position in SELLAS Life Sciences (SLS) for Q1 2026, worth a combined $228M — up 71% from $134M a quarter earlier.
Buyers outnumbered sellers: 67 funds opened new SLS positions and 16 closed out — a net gain of 51 holders — while 53 added to existing stakes and 18 trimmed.
The largest buyer was State Street, adding an estimated $27.8M. The largest seller was Millennium Management, cutting an estimated $5.5M.
- 160 institutional investors held SELLAS Life Sciences (SLS) as of Q1 2026, up from 112 in Q4 2025.
- Funds reported $228M of SELLAS Life Sciences stock for Q1 2026, up 71% quarter-over-quarter.
- 67 funds opened new SELLAS Life Sciences positions in Q1 2026 and 16 closed out, a net change of +51 holders.
- The largest SELLAS Life Sciences buyer in Q1 2026 was State Street, an estimated $27.8M added.
- The largest SELLAS Life Sciences seller in Q1 2026 was Millennium Management, an estimated $5.5M sold.
Based on aggregated 13F filings for Q1 2026.