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 153 institutions that hold shares in the stock, with a total of 61.2 Million shares, which have been reported (via 13F filing form) to have a value of $71 Million.
| Holding | Report Date | shares Held | Holding Value (Reported) | Last Trade | Trade History |
|---|---|---|---|---|---|
|
Vanguard Group Inc
Valley Forge, PA |
Aug 11, 2025 Q2 2025 |
8,669,661
shares
|
$10.1 Million
0.0% of portfolio
|
Q2 2025
Added 25.78%
|
|
|
Cathie Wood
Ark Investment Management LLC | St. Petersburg, Fl
|
Jul 30, 2025 Q2 2025 |
7,960,736
shares
|
$9.23 Million
0.13% of portfolio
|
Q2 2025
Reduced 8.64%
|
|
|
Black Rock Inc.
New York, NY |
Aug 13, 2024 Q2 2024 |
7,000,884
shares
|
$8.12 Million
0.0% of portfolio
|
Q2 2024
Reduced 3.2%
|
|
|
Nikko Asset Management Americas, Inc.
|
Aug 11, 2025 Q2 2025 |
5,621,303
shares
|
$6.52 Million
0.12% of portfolio
|
Q2 2025
Reduced 3.27%
|
|
|
Sumitomo Mitsui Trust Holdings, Inc.
|
Jul 31, 2025 Q2 2025 |
5,621,303
shares
|
$6.52 Million
0.01% of portfolio
|
Q2 2025
Reduced 3.27%
|
|
|
Israel Englander
Millennium Management LLC | New York, Ny
|
Aug 14, 2025 Q2 2025 |
3,779,259
shares
|
$4.38 Million
0.0% of portfolio
|
Q2 2025
Reduced 3.94%
|
|
|
Geode Capital Management, LLC
Boston, MA |
Aug 08, 2025 Q2 2025 |
3,447,738
shares
|
$4 Million
0.0% of portfolio
|
Q2 2025
Added 15.12%
|
|
|
State Street Corp
Boston, MA |
Aug 14, 2025 Q2 2025 |
2,756,437
shares
|
$3.2 Million
0.0% of portfolio
|
Q2 2025
Added 12.32%
|
|
|
Northern Trust Corp
Chicago, IL |
Aug 13, 2025 Q2 2025 |
2,289,456
shares
|
$2.66 Million
0.0% of portfolio
|
Q2 2025
Added 123.99%
|
|
|
Nuveen, LLC
Charlotte, NC |
Aug 12, 2025 Q2 2025 |
1,126,084
shares
|
$1.31 Million
0.0% of portfolio
|
Q2 2025
Added 252.89%
|
|
|
Susquehanna International Group, LLP
Bala Cynwyd, PA |
Aug 14, 2025 Q2 2025 |
986,084
shares
|
$1.14 Million
0.0% of portfolio
|
Q2 2025
Added 23.74%
|
|
|
Goldman Sachs Group Inc
New York, NY |
Aug 14, 2025 Q2 2025 |
894,100
shares
|
$1.04 Million
0.0% of portfolio
|
Q2 2025
Added 102.6%
|
|
|
Ubs Group Ag
|
Aug 14, 2025 Q2 2025 |
789,570
shares
|
$915,901
0.0% of portfolio
|
Q2 2025
Added 75.58%
|
|
|
Fosun International LTD
|
Aug 14, 2025 Q2 2025 |
743,935
shares
|
$862,964
0.9% of portfolio
|
Q4 2021
Reduced -0.0%
|
|
|
Foresite Capital Opportunity Management V, LLC
Larkspur, CA |
Nov 14, 2022 Q3 2022 |
633,626
shares
|
$735,006
5.23% of portfolio
|
Q2 2022
Reduced 60.35%
|
|
|
Two Sigma Investments, LP
New York, NY |
Aug 14, 2025 Q2 2025 |
564,442
shares
|
$654,752
0.0% of portfolio
|
Q2 2025
Reduced 30.91%
|
|
|
Ken Griffin
Citadel Advisors LLC | Chicago, Il
|
Aug 14, 2025 Q2 2025 |
558,307
shares
|
$647,636
0.0% of portfolio
|
Q2 2025
Added 303.12%
|
|
|
Bank Of America Corp
Charlotte, NC |
Aug 14, 2025 Q2 2025 |
465,999
shares
|
$540,558
0.0% of portfolio
|
Q2 2025
Added 426.58%
|
|
|
Royal Bank Of Canada
Toronto, A6 |
Aug 14, 2025 Q2 2025 |
460,289
shares
|
$533,935
0.0% of portfolio
|
Q2 2025
Added 3327.57%
|
|
|
Charles Schwab Investment Management Inc
San Francisco, CA |
Aug 12, 2025 Q2 2025 |
431,447
shares
|
$500,478
0.0% of portfolio
|
Q2 2025
Added 17.42%
|
|
|
Nuveen Asset Management, LLC
Chicago, IL |
Feb 14, 2025 Q4 2024 |
319,100
shares
|
$370,156
0.0% of portfolio
|
Q4 2024
Reduced 43.53%
|
|
|
Knollwood Investment Advisory, LLC
Hunt Valley, MD |
Aug 13, 2025 Q2 2025 |
300,000
shares
|
$348,000
0.06% of portfolio
|
Q1 2023
New holding
|
|
|
Morgan Stanley
New York, NY |
Aug 15, 2025 Q2 2025 |
289,913
shares
|
$336,299
0.0% of portfolio
|
Q2 2025
Added 0.84%
|
|
|
Jane Street Group, LLC
New York, NY |
Aug 14, 2025 Q2 2025 |
284,753
shares
|
$330,313
0.0% of portfolio
|
Q2 2025
New holding
|
|
|
Gsa Capital Partners LLP
London, X0 |
Jul 22, 2025 Q2 2025 |
284,363
shares
|
$329,861
0.04% of portfolio
|
Q2 2025
Added 15.5%
|