Quantum-Si Incorporated
QSI
137 hedge funds and large institutions have $69.3M invested in Quantum-Si Incorporated in 2025 Q1 according to their latest regulatory filings, with 38 funds opening new positions, 41 increasing their positions, 35 reducing their positions, and 22 closing their positions.
73% more first-time investments, than exits
New positions opened: 38 | Existing positions closed: 22
17% more repeat investments, than reductions
Existing positions increased: 41 | Existing positions reduced: 35
13% more funds holding
Funds holding: 121 → 137 (+16)
8.31% less ownership
Funds ownership: 43.71% → 35.4% (-8.3%)
22% less call options, than puts
Call options by funds: $1.48M | Put options by funds: $1.89M
52% less capital invested
Capital invested by funds: $145M → $69.3M (-$75.6M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Millennium Management
New York
|
+$7.54M |
| 2 |
Vanguard Group
Malvern,
Pennsylvania
|
+$2.68M |
| 3 |
BlackRock
New York
|
+$1.92M |
| 4 |
Two Sigma Investments
New York
|
+$1.27M |
| 5 |
Geode Capital Management
Boston,
Massachusetts
|
+$1.2M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Morgan Stanley
New York
|
-$6.12M |
| 2 |
Goldman Sachs
New York
|
-$1.07M |
| 3 |
Simplex Trading
Chicago,
Illinois
|
-$506K |
| 4 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
-$395K |
| 5 |
CC
Centiva Capital
New York
|
-$387K |
QSI Hedge Fund Activity: Q1 2025 in Review
137 of the 7,461 institutional investors tracked by Wall St. Rank reported a position in Quantum-Si Incorporated (QSI) for Q1 2025, worth a combined $69.3M — down 52% from $145M a quarter earlier.
Buyers outnumbered sellers: 38 funds opened new QSI positions and 22 closed out — a net gain of 16 holders — while 41 added to existing stakes and 35 trimmed.
The largest buyer was Millennium Management, opening a new position worth an estimated $7.54M. The largest seller was Morgan Stanley, cutting an estimated $6.12M.
- 137 institutional investors held Quantum-Si Incorporated (QSI) as of Q1 2025, up from 121 in Q4 2024.
- Funds reported $69.3M of Quantum-Si Incorporated stock for Q1 2025, down 52% quarter-over-quarter.
- 38 funds opened new Quantum-Si Incorporated positions in Q1 2025 and 22 closed out, a net change of +16 holders.
- The largest Quantum-Si Incorporated buyer in Q1 2025 was Millennium Management, an estimated $7.54M added.
- The largest Quantum-Si Incorporated seller in Q1 2025 was Morgan Stanley, an estimated $6.12M sold.
Based on aggregated 13F filings for Q1 2025.