Quantum-Si Incorporated
QSI • NASDAQ
Quantum-Si Incorporated is a biotechnology company in the healthcare sector on NASDAQ, led by Jeffrey Hawkins, with a market cap of $278.0M. As of Q3 2025, 32% of shares are held by 120 institutional investors, with BlackRock, Inc. as the largest holder at 5.59%.
Chief Executive OfficerJeffrey Hawkins
Market Cap$278.0M
Biotechnology
Healthcare
Employees165.0
Websitequantum-si.com
Country
United States of America
Overview
Overview of institutional ownership in QSI as of Q3 2025 with a market cap of $285.5M
All Institutions
- Institutions
- 120
- Value Held
- $91.2M
- Shares Held
- 64.6M
- Avg Position
- $760.3K
- Median Position
- $49.2K
Hedge Funds
- Hedge Funds
- 9
- Value Held
- $6.2M
- Shares Held
- 4.4M
- Avg Position
- $687.2K
- Median Position
- $118.2K
Ownership Breakdown
Based on market cap of $285.5M as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.
Biggest Investors
Institutions with the largest positions in QSI as of Q3 2025
| Institution | Position Value |
|---|---|
B BlackRock, Inc. Institution | $16.0M 0.00% of portfolio |
 VANGUARD GROUP INC Institution | $12.3M 0.00% of portfolio |
 ARK Investment Management LLC ETF Provider | $10.7M 0.07% of portfolio |
S Sumitomo Mitsui Trust Holdings, Inc. Institution | $7.4M 0.00% of portfolio |
 Nikko Asset Management Americas, Inc. Long Only Manager | $7.4M 0.07% of portfolio |
 GEODE CAPITAL MANAGEMENT LLC ETF Provider | $5.3M 0.00% of portfolio |
 STATE STREET CORP Institution | $4.0M 0.00% of portfolio |
 MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy | $3.8M 0.00% of portfolio |
 NORTHERN TRUST CORP Institution | $3.3M 0.00% of portfolio |
 SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity | $2.9M 0.00% of portfolio |
Net Capital Flow
Institutional buying and selling activity for QSI in Q3 2025
- Traded
- +$80.4K
- Buyers
- 55
- Sellers
- 61
- Total Bought
- +$8.1M
- Total Sold
- −$8.0M
- Avg Position
- $642.5K
Biggest Buyers
| Institution | Net Bought |
|---|---|
J JANE STREET GROUP, LLC Institution | +$1.9M +1.3M shares |
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity | +$1.5M +1.1M shares |
S Squarepoint Ops LLC Hedge Fund•Quant | +$865.0K +613.5K shares |
B BlackRock, Inc. Institution | +$667.7K +473.5K shares |
GEODE CAPITAL MANAGEMENT LLC ETF Provider | +$422.3K +299.4K shares |
 Verdence Capital Advisors LLC RIA/Wealth | +$383.4K +163.8K shares |
G GROUP ONE TRADING, L.P. Institution | +$342.8K +243.1K shares |
 IMC-Chicago, LLC RIA/Wealth | +$261.0K +185.1K shares |
X XTX Topco Ltd Institution | +$146.7K +104.1K shares |
 Invesco Ltd. ETF Provider | +$141.4K +100.3K shares |
Biggest Sellers
| Institution | Net Sold |
|---|---|
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy | −$1.6M −1.1M shares |
N Nuveen, LLC Institution | −$956.8K −678.6K shares |
 GOLDMAN SACHS GROUP INC Institution | −$714.8K −506.9K shares |
Nikko Asset Management Americas, Inc. Long Only Manager | −$569.4K −403.8K shares |
S Sumitomo Mitsui Trust Holdings, Inc. Institution | −$569.4K −403.8K shares |
 GSA CAPITAL PARTNERS LLP Hedge Fund•Quant | −$557.4K −284.4K shares |
ARK Investment Management LLC ETF Provider | −$474.7K −336.7K shares |
 AMERIPRISE FINANCIAL INC Institution | −$437.3K −223.1K shares |
 UBS Group AG Institution | −$401.4K −284.7K shares |
 CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy | −$213.3K −151.3K shares |
Entry and Exit Activity
Institutions that initiated new positions or completely exited QSI in Q3 2025
- New Positions
- 8
- New Value
- $797.0K
- Exited Positions
- 21
- Exited Value
- $1.9M
New Positions
| Institution | Position Value |
|---|---|
Verdence Capital Advisors LLC RIA/Wealth | $383.4K 163.8K shares |
IMC-Chicago, LLC RIA/Wealth | $261.0K 185.1K shares |
 Engineers Gate Manager LP Hedge Fund•Quant | $58.4K 41.5K shares |
 Elite Life Management LLC RIA/Wealth | $54.2K 20.6K shares |
 HBK Sorce Advisory LLC Hedge Fund•Multi-Strategy | $37.9K 21.4K shares |
O Optiver Holding B.V. Institution | $1.6K 1.1K shares |
 Union Bankshares Corp Institution | $354.0 251.0 shares |
 SRS Capital Advisors, Inc. RIA/Wealth | $146.0 104.0 shares |
Exited Positions
| Institution | Previous Position |
|---|---|
GSA CAPITAL PARTNERS LLP Hedge Fund•Quant | $557.4K 284.4K shares |
AMERIPRISE FINANCIAL INC Institution | $437.3K 223.1K shares |
 RENAISSANCE TECHNOLOGIES LLC Hedge Fund•Quant | $174.8K 89.2K shares |
 OZ MANAGEMENT LP Hedge Fund•Multi-Strategy | $153.3K 78.2K shares |
A AXQ CAPITAL, LP Hedge Fund•Market Neutral | $111.7K 57.0K shares |
T TWO SIGMA SECURITIES, LLC Institution | $74.2K 37.9K shares |
 Atom Investors LP Hedge Fund•Market Neutral | $40.8K 20.8K shares |
 Kingsview Wealth Management, LLC RIA/Wealth | $39.2K 20.0K shares |
 LEUCADIA NATIONAL CORP Institution | $39.2K 20.0K shares |
 Cetera Investment Advisers RIA/Wealth | $36.8K 18.8K shares |
Options Activity
Institutions with the largest Call and Put options positions in QSI as of Q3 2025
- Call Positions
- 6
- Call Value
- $2.3M
- Put Positions
- 6
- Put Value
- $1.3M
Call Positions
| Institution | Position Value |
|---|---|
P PEAK6 LLC Institution | $1.4M 9.9K contracts |
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy | $459.2K 3.3K contracts |
W WOLVERINE TRADING, LLC Institution | $281.3K 2.0K contracts |
J JANE STREET GROUP, LLC Institution | $86.3K 612.0 contracts |
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity | $80.7K 572.0 contracts |
B Belvedere Trading LLC Institution | $21.3K 151.0 contracts |
Put Positions
| Institution | Position Value |
|---|---|
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy | $655.2K 4.6K contracts |
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity | $581.6K 4.1K contracts |
W WOLVERINE TRADING, LLC Institution | $52.1K 375.0 contracts |
J JANE STREET GROUP, LLC Institution | $21.2K 150.0 contracts |
B Belvedere Trading LLC Institution | $1.7K 12.0 contracts |
OZ MANAGEMENT LP Hedge Fund•Multi-Strategy | - - contracts |
Most Committed Institutions
Institutions with QSI as the highest % of their portfolio as of Q3 2025
| Institution | Portfolio Weight |
|---|---|
F Fosun International Ltd Institution | 0.39% $1.0M |
 Green Alpha Advisors, LLC Long Only Manager | 0.29% $304.6K |
Elite Life Management LLC RIA/Wealth | 0.11% $54.2K |
Nikko Asset Management Americas, Inc. Long Only Manager | 0.07% $7.4M |
ARK Investment Management LLC ETF Provider | 0.07% $10.7M |
0.06% $84.3K | |
S Shay Capital LLC Institution | 0.04% $217.9K |
 Knollwood Investment Advisory, LLC Private Equity | 0.04% $423.0K |
Verdence Capital Advisors LLC RIA/Wealth | 0.02% $383.4K |
D Davy Asset Management Ltd Institution | 0.02% $266.7K |
Hedge Fund Spotlight
Discover hedge funds investing in QSI
AQR CAPITAL MANAGEMENT LLC
Hedge Fund • Multi-Strategy
Portfolio ManagerDavid Gary Kabiller
- Portfolio Value
- $156.17B
- Positions
- 3,453
- Last Reported
- Q3 2025
Sector Allocation
Position in Quantum-Si Incorporated
- Market Value
- $118.2K
- Shares Held
- 83.8K
- Portfolio Weight
- 0.00%
- Owned Since
- 2024-Q3
| Top Holding | Sector | Market Value | Weight |
|---|---|---|---|
Semiconductors Technology | $4.1B | 2.62% | |
Software - Infrastructure Technology | $3.2B | 2.05% | |
Consumer Electronics Technology | $2.8B | 1.76% |
