Cross-fund · 3 holders
QSI
QUANTUM SI INC
CUSIP 74765K105
3
Tracked holders
$21.1M
Aggregate value
23,241,517
Shares
4
Active funds
Funds holding QSI
| Fund | Strategy | Period | Value | % of book | Δ shares | Status |
|---|---|---|---|---|---|---|
| Vanguard | Institutional | Q4 2025 | $10.6M | — | +892,515 | +10.2% |
| BlackRock | Institutional | Q1 2026 | $10.4M | — | +360,892 | +2.8% |
| Citadel | Multi-Strategy | Q1 2026 | $169,929 | — | −3,273,551 | −93.7% |
| Millennium | Multi-Strategy | Q1 2026 | — | — | −191,791 | EXITED |
Aggregated from the latest 13F-HR per tracked fund (longs only). QoQ deltas compare against each fund's prior quarterly filing.