Quantum-Si Inc
QSI · US
Held by 1 big investorsLargest: ARK
Quantum-Si Inc is held by 1 of the 24 tracked investors in their latest 13F filings. The largest position is ARK Investment Management's at $6.3M, 0.04% of that portfolio.
Big investors holding this stock
Latest 13F of the 24 tracked investors. Common shares only.
| Investor | Value ($) | vs prior quarter |
|---|---|---|
| ARK Investment Management weight 0.04% · Q2 2026 |
6.3M | ▲ 4% |
Questions
Which big investors own Quantum-Si Inc?
ARK Investment Management ($6.3M), per their latest 13F filings.
Does Warren Buffett own Quantum-Si Inc?
Berkshire Hathaway did not report it in its latest 13F.
Does Korea's National Pension Service own Quantum-Si Inc?
Not in its latest 13F.
Restated and computed from SEC (13F, 13D/G, Form 4) and DART filings and NPS public data. Filings describe a past date and may differ from current holdings (13F: quarter end, up to 45 days later). Not investment advice.
Sources: SEC EDGAR, DART, data.go.kr (NPS), OpenFIGI. See Methodology for how figures are computed.