Security key
74765K105
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 63,088,581
- Total 13F value
- $48,930,989
- Share change
- -4,574,401
- Put/Call ratio
- 65%
- SEC-reported price per share
- $0.77
- Number of holders
- 155
- Value change
- -$4,176,811
- Number of buys
- 77
- Number of sells
- 55
- Shares outstanding
- 182,694,067
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2026
Institutions
155
Top holders
10
QSI full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2026
Previous quarter: Q4 2025
Quantum-Si Inc SEC filings
Quantum-Si Inc company facts
Broader feeds
Reporting periods
Holder history for CUSIP 74765K105
Recent filing periods:
Ownership snapshot
Top reported holders of QSI - Quantum-Si Inc - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Ph.D. Jonathan M. Rothberg
Disclosed value leader
Ph.D. Jonathan M. Rothberg
Comparable rows
15/15
Latest evidence
31 Dec 2025
13D/G
13F
3/4/5
Lead comparable stake: 100%
13D/G row: Ph.D. Jonathan M. Rothberg
Showing 1-6 of 15 holder rows.
Quick read
Ph.D. Jonathan M. Rothberg leads the comparable SEC ownership view at 100%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Ph.D. Jonathan M. Rothberg's linked filing trail.
Comparable ownership
Top 5
Ph.D. Jonathan M. Rothberg
100%
Amova Asset Management Americas, ...
4.8%
Sumitomo Mitsui Trust Group, Inc.
4.8%
VANGUARD GROUP INC
4.8%
ARK Investment Management LLC
4.8%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Ph.D. Jonathan M. Rothberg |
13D/G
ROTHBERG JONATHAN M.
|
100%
|
$23,326,875
19,937,500 shares
|
$0 | 09 Sep 2025 |
| Amova Asset Management Americas, Inc. |
13D/G
13F
Nikko Asset Management Americas, Inc. · Company
|
4.8%
|
$7,217,902
5,965,208 shares
|
$0 | 31 Dec 2024 |
| Sumitomo Mitsui Trust Group, Inc. |
13D/G
13F
Company
|
4.8%
|
$7,217,902
5,965,208 shares
|
$0 | 31 Dec 2024 |
| VANGUARD GROUP INC |
13D/G
13F
The Vanguard Group · Company
|
4.8%
|
$12,287,455
8,714,507 shares
|
+$63,233 | 30 Sep 2025 |
| ARK Investment Management LLC |
13D/G
13F
Company
|
4.8%
|
$11,792,099
7,809,337 shares
|
-$1,365,288 | 31 May 2025 |
| Todd C. Bennett |
3/4/5
Chief Commercial Officer
|
0.37%
|
$1,114,286
681,521 shares
|
-$61,316 | 22 Sep 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q1 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
155
Shares
63,088,581
Rows available
155
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q1 2026 vs Q4 2025 Across Filers
Q4 2025 holders
134
Q1 2026 holders
155
Holder diff
21
| Investor | Q4 2025 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q4 2025 value | Q1 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend