QUANTUM SI INC's ticker is and the CUSIP is 74765K905. A total of 3 filers reported holding QUANTUM SI INC in Q4 2021. The put-call ratio across all filers is - and the average weighting 0.0%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q3 2023 | $316 | +4414.3% | 190,800 | +4442.9% | 0.00% | – |
| Q2 2023 | $7 | 0.0% | 4,200 | 0.0% | 0.00% | – |
| Q1 2023 | $7 | -92.2% | 4,200 | -91.5% | 0.00% | – |
| Q4 2022 | $90 | -100.0% | 49,500 | -46.1% | 0.00% | – |
| Q3 2022 | $252,000 | -32.3% | 91,900 | -42.8% | 0.00% | – |
| Q2 2022 | $372,000 | -23.9% | 160,600 | +53.7% | 0.00% | – |
| Q1 2022 | $489,000 | -6.9% | 104,500 | +56.4% | 0.00% | -100.0% |
| Q4 2021 | $525,000 | -59.2% | 66,800 | -37.4% | 0.00% | 0.0% |
| Q3 2021 | $1,286,000 | +2.6% | 106,700 | +4.3% | 0.00% | 0.0% |
| Q2 2021 | $1,254,000 | – | 102,300 | – | 0.00% | – |
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Other shareholders
| Name | Shares | Value | Weighting ↓ |
|---|---|---|---|
| GROUP ONE TRADING, L.P. | 509,300 | $4,008,000 | 0.00% |
| SIMPLEX TRADING, LLC | 66,800 | $525,000 | 0.00% |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | $0 | 0.00% |