Institutional Ownership Quantum Si Inc (QSI)
This table provides information about the institutional ownership of Quantum Si Inc (QSI). We have compiled data on the 143 institutions that hold shares in the stock, with a total of 60.8 Million shares, which have been reported (via 13F filing form) to have a value of $86.4 Million.
| Holding | Report Date | shares Held | Holding Value (Reported) | Last Trade | Trade History |
|---|---|---|---|---|---|
|
Vanguard Group Inc
Valley Forge, PA |
Nov 07, 2025 Q3 2025 |
8,714,507
shares
|
$12.4 Million
0.0% of portfolio
|
Q3 2025
Added 0.52%
|
|
|
Cathie Wood
Ark Investment Management LLC | St. Petersburg, Fl
|
Nov 12, 2025 Q3 2025 |
7,624,042
shares
|
$10.8 Million
0.08% of portfolio
|
Q3 2025
Reduced 4.23%
|
|
|
Black Rock Inc.
New York, NY |
Aug 13, 2024 Q2 2024 |
7,000,884
shares
|
$9.94 Million
0.0% of portfolio
|
Q2 2024
Reduced 3.2%
|
|
|
Sumitomo Mitsui Trust Holdings, Inc.
|
Oct 27, 2025 Q3 2025 |
5,217,499
shares
|
$7.41 Million
0.0% of portfolio
|
Q3 2025
Reduced 7.18%
|
|
|
Nikko Asset Management Americas, Inc.
|
Nov 12, 2025 Q3 2025 |
5,217,499
shares
|
$7.41 Million
0.08% of portfolio
|
Q3 2025
Reduced 7.18%
|
|
|
Geode Capital Management, LLC
Boston, MA |
Nov 12, 2025 Q3 2025 |
3,747,169
shares
|
$5.32 Million
0.0% of portfolio
|
Q3 2025
Added 8.68%
|
|
|
State Street Corp
Boston, MA |
Nov 14, 2025 Q3 2025 |
2,817,490
shares
|
$4 Million
0.0% of portfolio
|
Q3 2025
Added 2.21%
|
|
|
Israel Englander
Millennium Management LLC | New York, Ny
|
Nov 14, 2025 Q3 2025 |
2,669,959
shares
|
$3.79 Million
0.0% of portfolio
|
Q3 2025
Reduced 29.35%
|
|
|
Northern Trust Corp
Chicago, IL |
Nov 14, 2025 Q3 2025 |
2,323,042
shares
|
$3.3 Million
0.0% of portfolio
|
Q3 2025
Added 1.47%
|
|
|
Susquehanna International Group, LLP
Bala Cynwyd, PA |
Nov 14, 2025 Q3 2025 |
2,041,095
shares
|
$2.9 Million
0.0% of portfolio
|
Q3 2025
Added 106.99%
|
|
|
Jane Street Group, LLC
New York, NY |
Nov 13, 2025 Q3 2025 |
1,610,023
shares
|
$2.29 Million
0.0% of portfolio
|
Q3 2025
Added 465.41%
|
|
|
Fosun International LTD
|
Nov 14, 2025 Q3 2025 |
743,935
shares
|
$1.06 Million
1.52% of portfolio
|
Q4 2021
Reduced -0.0%
|
|
|
Foresite Capital Opportunity Management V, LLC
Larkspur, CA |
Nov 14, 2022 Q3 2022 |
633,626
shares
|
$899,748
5.23% of portfolio
|
Q2 2022
Reduced 60.35%
|
|
|
Squarepoint Ops LLC
New York, NY |
Nov 14, 2025 Q3 2025 |
613,475
shares
|
$871,134
0.0% of portfolio
|
Q3 2025
New holding
|
|
|
Royal Bank Of Canada
Toronto, A6 |
Nov 14, 2025 Q3 2025 |
532,293
shares
|
$755,856
0.0% of portfolio
|
Q2 2025
Added 3327.57%
|
|
|
Two Sigma Investments, LP
New York, NY |
Nov 14, 2025 Q3 2025 |
515,852
shares
|
$732,509
0.0% of portfolio
|
Q3 2025
Reduced 8.61%
|
|
|
Ubs Group Ag
|
Nov 13, 2025 Q3 2025 |
504,859
shares
|
$716,899
0.0% of portfolio
|
Q3 2025
Reduced 36.06%
|
|
|
Charles Schwab Investment Management Inc
San Francisco, CA |
Nov 10, 2025 Q3 2025 |
468,088
shares
|
$664,684
0.0% of portfolio
|
Q3 2025
Added 8.49%
|
|
|
Nuveen, LLC
Charlotte, NC |
Nov 12, 2025 Q3 2025 |
447,519
shares
|
$635,476
0.0% of portfolio
|
Q3 2025
Reduced 60.26%
|
|
|
Ken Griffin
Citadel Advisors LLC | Chicago, Il
|
Nov 14, 2025 Q3 2025 |
407,047
shares
|
$578,006
0.0% of portfolio
|
Q3 2025
Reduced 27.09%
|
|
|
Goldman Sachs Group Inc
New York, NY |
Nov 14, 2025 Q3 2025 |
387,151
shares
|
$549,754
0.0% of portfolio
|
Q3 2025
Reduced 56.7%
|
|
|
Group One Trading, L.P.
Chicago, IL |
Nov 12, 2025 Q3 2025 |
377,774
shares
|
$536,439
0.02% of portfolio
|
Q3 2025
Added 180.6%
|
|
|
Bank Of America Corp
Charlotte, NC |
Nov 14, 2025 Q3 2025 |
348,007
shares
|
$494,169
0.0% of portfolio
|
Q3 2025
Reduced 25.32%
|
|
|
Nuveen Asset Management, LLC
Chicago, IL |
Feb 14, 2025 Q4 2024 |
319,100
shares
|
$453,122
0.0% of portfolio
|
Q4 2024
Reduced 43.53%
|
|
|
Knollwood Investment Advisory, LLC
Hunt Valley, MD |
Nov 13, 2025 Q3 2025 |
300,000
shares
|
$426,000
0.04% of portfolio
|
Q1 2023
New holding
|
|