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 |
|---|---|---|---|---|---|
|
Green Alpha Advisors, LLC
|
Jan 07, 2026 Q4 2025 |
51,528
shares
|
$73,169
0.08% of portfolio
|
Q4 2025
Reduced 76.15%
|
|
|
Mariner, LLC
Overland Park, KS |
Nov 14, 2025 Q3 2025 |
50,529
shares
|
$71,751
0.0% of portfolio
|
Q3 2025
Reduced 0.13%
|
|
|
Manufacturers Life Insurance Company, The
Toronto, A6 |
Nov 14, 2025 Q3 2025 |
47,666
shares
|
$67,685
0.0% of portfolio
|
Q3 2025
Reduced 2.88%
|
|
|
Police & Firemen'S Retirement System Of New Jersey
Trenton, NJ |
Nov 12, 2025 Q3 2025 |
46,170
shares
|
$65,561
0.0% of portfolio
|
Q3 2025
Added 48.29%
|
|
|
Sg Americas Securities, LLC
|
Oct 23, 2025 Q3 2025 |
42,107
shares
|
$59,791
0.0% of portfolio
|
Q3 2025
Added 30.84%
|
|
|
Engineers Gate Manager LP
New York, NY |
Nov 14, 2025 Q3 2025 |
41,451
shares
|
$58,860
0.0% of portfolio
|
Q3 2025
New holding
|
|
|
Cambridge Investment Research Advisors, Inc.
|
Nov 12, 2025 Q3 2025 |
38,867
shares
|
$55,191
0.0% of portfolio
|
Q4 2024
Reduced 19.4%
|
|
|
Red Wave Investments LLC
Dillsburg, PA |
Oct 28, 2025 Q3 2025 |
37,000
shares
|
$52,540
0.02% of portfolio
|
Q3 2021
New holding
|
|
|
Sanctuary Advisors, LLC
Indianapolis, IN |
Jan 06, 2026 Q3 2025 |
36,782
shares
|
$52,230
0.0% of portfolio
|
Q3 2025
Added 1.22%
|
|
|
Commonwealth Equity Services, LLC
|
Oct 22, 2025 Q3 2025 |
36,179
shares
|
$51,374
0.0% of portfolio
|
Q3 2025
Added 41.8%
|
|
|
Hollencrest Capital Management
|
Nov 03, 2025 Q3 2025 |
35,000
shares
|
$49,700
0.0% of portfolio
|
Q3 2025
Added 40.0%
|
|
|
Captrust Financial Advisors
Raleigh, NC |
Nov 19, 2025 Q3 2025 |
34,828
shares
|
$49,455
0.0% of portfolio
|
Q3 2025
Added 1.51%
|
|
|
Jtc Employer Solutions Trustee LTD
|
Oct 23, 2025 Q3 2025 |
34,540
shares
|
$49,046
0.0% of portfolio
|
Q3 2025
Added 158.92%
|
|
|
Sbi Securities Co., Ltd.
Tokyo, M0 |
Nov 04, 2025 Q3 2025 |
33,616
shares
|
$47,734
0.0% of portfolio
|
Q3 2025
Added 28.59%
|
|
|
Sei Investments CO
Oaks, PA |
Nov 13, 2025 Q3 2025 |
33,103
shares
|
$47,006
0.0% of portfolio
|
Q2 2024
Reduced 4.6%
|
|
|
Wolverine Trading, LLC
Chicago, IL |
Nov 14, 2025 Q3 2025 |
33,034
shares
|
$46,908
0.0% of portfolio
|
Q3 2025
Reduced 18.28%
|
|
|
Russell Investments Group, Ltd.
|
Nov 13, 2025 Q3 2025 |
32,006
shares
|
$45,448
0.0% of portfolio
|
Q3 2025
Added 7.04%
|
|
|
Wealth Management Associates, Inc.
Cherry Hill, NJ |
Oct 21, 2025 Q3 2025 |
30,950
shares
|
$43,949
0.02% of portfolio
|
Q3 2025
Added 14.84%
|
|
|
Lpl Financial LLC
Fort Mill, SC |
Nov 12, 2025 Q3 2025 |
28,460
shares
|
$40,413
0.0% of portfolio
|
Q3 2025
Added 22.2%
|
|
|
Voya Investment Management LLC
Atlanta, GA |
Oct 09, 2025 Q3 2025 |
27,246
shares
|
$38,689
0.0% of portfolio
|
Q3 2025
Reduced 29.89%
|
|
|
Mercer Global Advisors Inc
Denver, CO |
Nov 14, 2025 Q3 2025 |
26,989
shares
|
$38,324
0.0% of portfolio
|
Q3 2025
Added 6.84%
|
|
|
Pro Share Advisors LLC
|
Nov 05, 2025 Q3 2025 |
26,860
shares
|
$38,141
0.0% of portfolio
|
Q3 2025
Reduced 7.14%
|
|
|
New York State Common Retirement Fund
|
Nov 03, 2025 Q3 2025 |
26,084
shares
|
$37,039
0.0% of portfolio
|
Q1 2024
Reduced 0.39%
|
|
|
Pathstone Family Office, LLC
Englewood, NJ |
Nov 08, 2023 Q3 2023 |
26,039
shares
|
$36,975
0.0% of portfolio
|
Q3 2023
New holding
|
|
|
Vanguard Personalized Indexing Management, LLC
Oakland, CA |
Oct 31, 2025 Q3 2025 |
25,193
shares
|
$35,774
0.0% of portfolio
|
Q3 2025
Added 4.57%
|
|