QSI
QUANTUM-SI INCData as of 2026 Q2 (06-30) · 13F snapshot
Summary
QUANTUM-SI INC (QSI) is held as common stock by 5 tracked hedge-fund managers, with a combined reported value of ~$9.68M; the largest are Cathie Wood, Izzy Englander, Renaissance Technologies. 1 tracked manager also disclosed PUT or CALL positions, reported separately below. This quarter: 2 new, 3 added. Data as of 2026 Q2, from public SEC 13F filings, delayed up to ~45 days.
Attention · MediumThis quarter · Heating up
Common-stock holders51 also report options
Congress trades0
Price$0.80vs quarter-end-10.17%
Sectors0
This quarter's moves
Top holderNew2
Added3
Trimmed / sold0
Cathie WoodCommon-stock positions
PUT and CALL disclosures are excluded from these holder counts and values.
| Investor | Value | % of portfolio | Action |
|---|
PUT / CALL disclosures
Reported separately: 13F option values are not common-stock ownership and do not reveal the full strategy or economic exposure.
Value $160.2K— of portfolio181,0002026 Q2
Value $95.2K— of portfolio107,6002026 Q2
| Investor | Value | % of portfolio | Action |
|---|---|---|---|
| Ken GriffinCALL | $160.2K | — | — |
| Ken GriffinPUT | $95.2K | — | — |
ARK ETF holdings
Cathie Wood · dailyARK total shares held · drag to inspect
2026-09-29holds 6,836,196
- ARKGweight in fund0.25%$5.43M
ARK publishes full ETF holdings daily (SEC Rule 6c-11). Line shows ARK's total shares held over time (not price); markers are buy/sell days. Derived from public CSVs — research only, not investment advice.
Public SEC 13F filings may appear up to 45 days after quarter-end; STOCK Act / OGE trade filings are generally due within 45 days but may be late. Partial data only — research, not investment advice.