- Type / Class
- Equity / Common Stock
- Shares outstanding
- 182,694,067
- Total 13F shares
- 5,671,231
- Share change
- -114,464
- Total reported value
- $4,381,649
- Price per share
- $0.77
- Number of holders
- 39
- Value change
- -$111,856
- Number of buys
- 22
- Number of sells
- 11
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.
Next holder-history checks
These links keep the next click tied to holder verification, nearby quarters, or outside-13F ownership context.
- Back to full security ownership history for the broader multi-quarter picture.
- Latest 13F filings for newly reported positions across managers.
- Latest Schedule 13D/13G reports for ownership changes outside the 13F cadence.
- SEC investors directory for manager drilldown.
Explore More Reporting Periods
Jump to adjacent filing periods for faster comparison and easier crawl discovery.
- Previous quarter: Q4 2025
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 | |
| James B. Tananbaum |
3/4/5
|
Director |
—
class O/S missing
|
8,424,317
|
$14,911,041 | — | 10 Jun 2021 | |
| BlackRock, Inc. |
13F
|
Company |
7.1%
|
13,054,057
|
$14,359,463 | — | 31 Dec 2025 | |
| VANGUARD GROUP INC |
13D/G
13F
|
The Vanguard Group · Company |
4.8%
|
8,714,507
|
$12,287,455 | +$63,233 | 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. |
13D/G
13F
|
Nikko Asset Management Americas, Inc. · Company |
4.8%
|
5,965,208
|
$7,217,902 | $0 | 31 Dec 2024 | |
| Sumitomo Mitsui Trust Group, Inc. |
13D/G
13F
|
Company |
4.8%
|
5,965,208
|
$7,217,902 | $0 | 31 Dec 2024 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
2.3%
|
4,114,375
|
$4,526,616 | — | 31 Dec 2025 | |
| STATE STREET CORP |
13F
|
Company |
2%
|
3,562,721
|
$3,918,993 | — | 31 Dec 2025 | |
| John Viii Stark |
3/4/5
|
Chief Executive Officer, Director |
—
class O/S missing
|
1,977,368
|
$3,499,941 | — | 10 Jan 2022 | |
| CITADEL ADVISORS LLC |
13F
|
Company |
1.5%
|
2,676,097
|
$2,943,707 | — | 31 Dec 2025 | |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP |
13F
|
Company |
—
mixed-class rows
|
2,422,916
mixed-class rows
|
$2,579,628 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
1.2%
|
2,207,936
|
$2,428,730 | — | 31 Dec 2025 | |
| UBS Group AG |
13F
|
Company |
—
mixed-class rows
|
1,451,650
mixed-class rows
|
$1,594,894 | — | 31 Dec 2025 | |
| TWO SIGMA INVESTMENTS, LP |
13F
|
Company |
0.76%
|
1,384,181
|
$1,522,599 | — | 31 Dec 2025 | |
| Kevin Rakin |
3/4/5
|
Director |
—
mixed-class rows
|
1,346,607
mixed-class rows
|
$1,476,819 | — | 19 May 2025 | |
| JANE STREET GROUP, LLC |
13F
|
Company |
—
mixed-class rows
|
1,120,994
mixed-class rows
|
$1,217,837 | — | 31 Dec 2025 | |
| Todd C. Bennett |
3/4/5
|
Chief Commercial Officer |
0.37%
|
681,521
|
$1,114,286 | -$61,316 | 22 Sep 2025 | |
| Ph.D. Christian LaPointe |
3/4/5
|
GC & Corp. Secretary |
—
mixed-class rows
|
1,510,356
mixed-class rows
|
$990,280 | -$62,337 | 20 Mar 2026 | |
| John S. Vieceli |
3/4/5
|
Chief Product Officer |
—
mixed-class rows
|
1,639,165
mixed-class rows
|
$967,665 | -$114,432 | 20 Mar 2026 | |
| Fosun International Ltd |
13F
|
Company |
0.41%
|
743,935
|
$818,329 | — | 31 Dec 2025 | |
| Charles R. Kummeth |
3/4/5
|
Director |
—
mixed-class rows
|
981,095
mixed-class rows
|
$786,258 | +$459,800 | 05 Mar 2026 | |
| Matthew Dyer |
3/4/5
|
Chief Business Officer |
—
class O/S missing
|
333,393
|
$590,106 | — | 13 Jun 2022 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.26%
|
468,174
|
$514,991 | — | 31 Dec 2025 | |
| XTX Topco Ltd |
13F
|
Company |
0.25%
|
461,982
|
$508,180 | — | 31 Dec 2025 | |
| Nuveen, LLC |
13F
|
Company |
0.24%
|
447,519
|
$492,271 | — | 31 Dec 2025 | |
| Bank of New York Mellon Corp |
13F
|
Company |
0.22%
|
406,291
|
$446,920 | — | 31 Dec 2025 | |
| Invesco Ltd. |
13F
|
Company |
0.22%
|
402,821
|
$443,103 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
0.22%
|
399,994
|
$439,994 | — | 31 Dec 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.21%
|
386,824
|
$425,507 | — | 31 Dec 2025 | |
| Grace Johnston |
3/4/5
|
Chief Commercial Officer |
—
class O/S missing
|
295,940
|
$353,915 | — | 21 Jun 2024 | |
| Knollwood Investment Advisory, LLC |
13F
|
Company |
0.16%
|
300,000
|
$330,000 | — | 31 Dec 2025 | |
| Quadrature Capital Ltd |
13F
|
Company |
0.15%
|
276,889
|
$304,578 | — | 31 Dec 2025 | |
| ALLIANCEBERNSTEIN L.P. |
13F
|
Company |
0.15%
|
272,180
|
$299,398 | — | 31 Dec 2025 | |
| BARCLAYS PLC |
13F
|
Company |
0.15%
|
269,415
|
$296,357 | — | 31 Dec 2025 | |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC |
13F
|
Company |
0.14%
|
261,100
|
$287,210 | — | 31 Dec 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0.14%
|
258,445
|
$284,289 | — | 31 Dec 2025 | |
| IQ EQ FUND MANAGEMENT (IRELAND) Ltd |
13F
|
Company |
0.14%
|
253,895
|
$279,285 | — | 31 Dec 2025 | |
| GROUP ONE TRADING LLC |
13F
|
Company |
0.13%
|
245,801
|
$270,381 | — | 31 Dec 2025 | |
| Virtu Financial LLC |
13F
|
Company |
0.13%
|
238,379
|
$262,000 | — | 31 Dec 2025 | |
| Paula Dowdy |
3/4/5
|
Director |
—
mixed-class rows
|
395,202
mixed-class rows
|
$255,786 | +$104,450 | 05 Mar 2026 | |
| RHUMBLINE ADVISERS |
13F
|
Company |
0.11%
|
193,595
|
$212,948 | — | 31 Dec 2025 | |
| MILLENNIUM MANAGEMENT LLC |
13F
|
Company |
0.1%
|
191,791
|
$210,970 | — | 31 Dec 2025 | |
| Verdence Capital Advisors LLC |
13F
|
Company |
0.1%
|
187,805
|
$206,585 | — | 31 Dec 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 |
0.1%
|
176,132
|
$193,745 | — | 31 Dec 2025 | |
| LOS ANGELES CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.05%
|
93,010
|
$188,810 | — | 31 Dec 2025 | |
| Scott Mendel |
3/4/5
|
Director |
—
mixed-class rows
|
267,938
mixed-class rows
|
$171,630 | — | 19 May 2025 | |
| Shay Capital LLC |
13F
|
Company |
0.08%
|
149,132
|
$164,045 | — | 31 Dec 2025 |
Institutional Holders of Quantum-Si Inc - Common Stock (QSI) as of Q1 2026
As of 31 Mar 2026,
Quantum-Si Inc - Common Stock (QSI) was held by
39 institutional
shareholders
that filed Form 13F with the SEC.
Together, they reported ownership of
5,671,231 shares.
The largest 10 holders included
Sumitomo Mitsui Trust Group, Inc., Nuveen, LLC, Verdence Capital Advisors LLC, WEALTH ENHANCEMENT ADVISORY SERVICES, LLC, Police & Firemen's Retirement System of New Jersey, Green Alpha Advisors, LLC, Cambridge Investment Research Advisors, Inc., Merit Financial Group, LLC, China Universal Asset Management Co., Ltd., and SG Americas Securities, LLC.
This page lists
39
institutional shareholders reporting positions in this security
for the Q1 2026 filing period.
| Investor | Option | Weight % | Change % | Value $ | * Price | Shares | Share Change | Activity | Report Period |
|---|
Compare Q1 2026 vs Q4 2025 Across Filers
Q4 2025 holders
134
Q1 2026 holders
39
Holder diff
-95
| Investor | Q4 2025 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q4 2025 Value $ | Q1 2026 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.