Institutional Ownership
Quantum Si Inc
CUSIP 74765K113*W EXP 06/10/202QSIAWQ1 2026
13D / 13G Filings
0
Schedule 13D/13G on record
Beneficial Filers
0
Distinct reporting persons
Largest Stake
—
Max % of class reported
Institutional Holders
6
13F filers (latest quarter)
Beneficial Owners — Schedule 13D / 13G
Schedule 13D (activist) & 13G (passive) 5%+ ownership filings
No 13D/13G filings on record yet
Schedule 13D/13G beneficial-ownership filings from 2020–present are ingested from SEC EDGAR. Coverage expands as the backfill and daily crawler run.
Top Institutional Holders (13F)
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | Deerfield Management Company, L.P. | 333.3K | $36.2K |
| 2 | Susquehanna International Group, LLP | 85.1K | $10.2K |
| 3 | Jane Street Group, LLC | 16.6K | $1.8K |
| 4 | Wolverine Asset Management LLC | 14.5K | $1.6K |
| 5 | Ubs Group AG | 2.1K | $227 |
| 6 | Toronto Dominion Bank | 100 | $11 |