- Type / Class
- Equity / Common Stock
- Shares outstanding
- 182,694,067
- Total 13F shares
- 67,443,329
- Share change
- +2,737,397
- Total reported value
- $74,141,655
- Put/Call ratio
- 160%
- Price per share
- $1.10
- Number of holders
- 134
- Value change
- +$2,647,825
- Number of buys
- 64
- Number of sells
- 56
Quarterly Holders Quick Answers
What is CUSIP 74765K105?
CUSIP 74765K105 identifies QSI - Quantum-Si Inc - Common Stock in SEC institutional holdings data.
Need full ownership history?
Open the full security ownership history page.
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- Back to full security ownership history for the broader multi-quarter picture.
- Latest 13F filings for newly reported positions across managers.
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Jump to adjacent filing periods for faster comparison and easier crawl discovery.
Recent filing periods for CUSIP 74765K105:
Top shareholders of QSI - Quantum-Si Inc - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| Ph.D. Jonathan M. Rothberg |
13D/G
3/4/5
|
ROTHBERG JONATHAN M. · Director, 10%+ Owner |
100%
|
19,937,500
|
$23,326,875 | $0 | 09 Sep 2025 | |
| 2012 JMR Trust Common LLC |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
12,480,108
|
$22,089,791 | — | 10 Jun 2021 | |
| BlackRock, Inc. |
13F
|
Company |
6.2%
|
11,321,673
|
$15,963,559 | — | 30 Sep 2025 | |
| James B. Tananbaum |
3/4/5
|
Director |
—
class O/S missing
|
8,424,317
|
$14,911,041 | — | 10 Jun 2021 | |
| VANGUARD GROUP INC |
13F
13D/G
|
Company · The Vanguard Group |
4.8%
from 13D/G
|
8,714,507
|
$12,287,455 | — | 30 Sep 2025 | |
| ARK Investment Management LLC |
13D/G
13F
|
Company |
4.8%
|
7,809,337
|
$11,792,099 | -$1,365,288 | 31 May 2025 | |
| Amova Asset Management Americas, Inc. |
13F
13D/G
|
Company · Nikko Asset Management Americas, Inc. |
4.8%
from 13D/G
|
5,217,499
|
$7,356,674 | — | 30 Sep 2025 | |
| Sumitomo Mitsui Trust Group, Inc. |
13F
13D/G
|
Company |
4.8%
from 13D/G
|
5,217,499
|
$7,356,674 | — | 30 Sep 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
2.1%
|
3,747,169
|
$5,284,591 | — | 30 Sep 2025 | |
| STATE STREET CORP |
13F
|
Company |
1.5%
|
2,817,490
|
$3,972,661 | — | 30 Sep 2025 | |
| MILLENNIUM MANAGEMENT LLC |
13F
|
Company |
1.5%
|
2,669,959
|
$3,764,642 | — | 30 Sep 2025 | |
| John Viii Stark |
3/4/5
|
Chief Executive Officer, Director |
—
class O/S missing
|
1,977,368
|
$3,499,941 | — | 10 Jan 2022 | |
| NORTHERN TRUST CORP |
13F
|
Company |
1.3%
|
2,323,042
|
$3,275,489 | — | 30 Sep 2025 | |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP |
13F
|
Company |
—
mixed-class rows
|
2,186,828
mixed-class rows
|
$2,915,849 | — | 30 Sep 2025 | |
| JANE STREET GROUP, LLC |
13F
|
Company |
—
mixed-class rows
|
1,627,160
mixed-class rows
|
$2,274,760 | — | 30 Sep 2025 | |
| Kevin Rakin |
3/4/5
|
Director |
—
mixed-class rows
|
1,346,607
mixed-class rows
|
$1,476,819 | — | 19 May 2025 | |
| Todd C. Bennett |
3/4/5
|
Chief Commercial Officer |
0.37%
|
681,521
|
$1,114,286 | -$61,316 | 22 Sep 2025 | |
| Fosun International Ltd |
13F
|
Company |
0.41%
|
743,935
|
$1,048,948 | — | 30 Sep 2025 | |
| Squarepoint Ops LLC |
13F
|
Company |
0.34%
|
613,475
|
$865,000 | — | 30 Sep 2025 | |
| ROYAL BANK OF CANADA |
13F
|
Company |
0.29%
|
532,293
|
$750,000 | — | 30 Sep 2025 | |
| TWO SIGMA INVESTMENTS, LP |
13F
|
Company |
0.28%
|
515,852
|
$727,351 | — | 30 Sep 2025 | |
| UBS Group AG |
13F
|
Company |
—
mixed-class rows
|
506,003
mixed-class rows
|
$712,160 | — | 30 Sep 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.26%
|
468,088
|
$660,004 | — | 30 Sep 2025 | |
| Nuveen, LLC |
13F
|
Company |
0.24%
|
447,519
|
$631,002 | — | 30 Sep 2025 | |
| Matthew Dyer |
3/4/5
|
Chief Business Officer |
—
class O/S missing
|
333,393
|
$590,106 | — | 13 Jun 2022 | |
| CITADEL ADVISORS LLC |
13F
|
Company |
0.22%
|
407,047
|
$573,936 | — | 30 Sep 2025 | |
| Bank of New York Mellon Corp |
13F
|
Company |
0.22%
|
394,905
|
$556,815 | — | 30 Sep 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.21%
|
387,151
|
$545,883 | — | 30 Sep 2025 | |
| GROUP ONE TRADING LLC |
13F
|
Company |
0.21%
|
377,774
|
$532,661 | — | 30 Sep 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0.19%
|
348,007
|
$490,691 | — | 30 Sep 2025 | |
| Knollwood Investment Advisory, LLC |
13F
|
Company |
0.16%
|
300,000
|
$423,000 | — | 30 Sep 2025 | |
| Invesco Ltd. |
13F
|
Company |
0.16%
|
295,728
|
$416,976 | — | 30 Sep 2025 | |
| ALLIANCEBERNSTEIN L.P. |
13F
|
Company |
0.15%
|
272,180
|
$383,774 | — | 30 Sep 2025 | |
| Verdence Capital Advisors LLC |
13F
|
Company |
0.09%
|
163,830
|
$383,362 | — | 30 Sep 2025 | |
| MORGAN STANLEY |
13F
|
Company |
0.15%
|
271,000
|
$382,111 | — | 30 Sep 2025 | |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC |
13F
|
Company |
0.14%
|
261,100
|
$368,151 | — | 30 Sep 2025 | |
| Grace Johnston |
3/4/5
|
Chief Commercial Officer |
—
class O/S missing
|
295,940
|
$353,915 | — | 21 Jun 2024 | |
| BARCLAYS PLC |
13F
|
Company |
0.12%
|
221,210
|
$311,906 | — | 30 Sep 2025 | |
| RHUMBLINE ADVISERS |
13F
|
Company |
0.12%
|
219,965
|
$310,140 | — | 30 Sep 2025 | |
| Green Alpha Advisors, LLC |
13F
|
Company |
0.12%
|
216,032
|
$304,605 | — | 30 Sep 2025 | |
| IQ EQ FUND MANAGEMENT (IRELAND) Ltd |
13F
|
Company |
0.1%
|
189,174
|
$266,735 | — | 30 Sep 2025 | |
| IMC-Chicago, LLC |
13F
|
Company |
0.1%
|
185,117
|
$261,015 | — | 30 Sep 2025 | |
| Pathstone Holdings, LLC |
13F
|
Company |
0.1%
|
183,934
|
$259,347 | — | 30 Sep 2025 | |
| SUMMIT WEALTH GROUP LLC / CO |
13F
|
Company |
0%
|
2,330
|
$225,264 | — | 30 Sep 2025 | |
| Shay Capital LLC |
13F
|
Company |
0.08%
|
154,572
|
$217,947 | — | 30 Sep 2025 | |
| SIMPLEX TRADING, LLC |
13F
|
Company |
0.08%
|
154,083
|
$217,000 | — | 30 Sep 2025 | |
| XTX Topco Ltd |
13F
|
Company |
0.08%
|
150,532
|
$212,250 | — | 30 Sep 2025 | |
| Ruth A. Fattori |
3/4/5
|
Director |
—
mixed-class rows
|
296,607
mixed-class rows
|
$206,319 | — | 19 May 2025 | |
| WELLS FARGO & COMPANY/MN |
13F
|
Company |
0.07%
|
135,950
|
$191,690 | — | 30 Sep 2025 | |
| Scott Mendel |
3/4/5
|
Director |
—
mixed-class rows
|
267,938
mixed-class rows
|
$171,630 | — | 19 May 2025 |
Institutional Holders of Quantum-Si Inc - Common Stock (QSI) as of Q4 2025
As of 31 Dec 2025,
Quantum-Si Inc - Common Stock (QSI) was held by
134 institutional
shareholders
that filed Form 13F with the SEC.
Together, they reported ownership of
67,443,329 shares.
The largest 10 holders included
BlackRock, Inc., VANGUARD GROUP INC, ARK Investment Management LLC, Amova Asset Management Americas, Inc., Sumitomo Mitsui Trust Group, Inc., GEODE CAPITAL MANAGEMENT, LLC, STATE STREET CORP, CITADEL ADVISORS LLC, SUSQUEHANNA INTERNATIONAL GROUP, LLP, and NORTHERN TRUST CORP.
This page lists
134
institutional shareholders reporting positions in this security
for the Q4 2025 filing period.
| Investor | Option | Weight % | Change % | Value $ | * Price | Shares | Share Change | Activity | Report Period |
|---|
Compare Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
120
Q4 2025 holders
134
Holder diff
14
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 Value $ | Q4 2025 Value $ | Value Diff $ | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.
An asterisk sign (*) next to the price indicates that the price is likely invalid.