QSI — Quantum-Si Inc
Price · 2024-08-26 → 2026-08-21
499 daily closes shownAnonymous view is capped at two years of history. A free account extends it to five, and Pro opens the whole archive back to 2020-11-13.
Performance
Technicals
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Measured signals that fired on QSI
| date | signal | measured base rate |
|---|---|---|
| 2026-06-24 | Cluster sale: three or more insiders insider | -0.37% over 21 days · t = -3.38 · n = 21,542 statistically distinguishable from its control group |
| 2026-06-01 | Equal highs taken out structure | -0.70% over 21 days · t = -8.28 · n = 68,636 statistically distinguishable from its control group |
| 2026-03-24 | Cluster sale: three or more insiders insider | -0.37% over 21 days · t = -3.38 · n = 21,542 statistically distinguishable from its control group |
| 2026-03-20 | Equal lows taken out structure | -0.64% over 21 days · t = -4.75 · n = 55,661 statistically distinguishable from its control group |
Excess return against a matched control group, on a point-in-time universe that includes delisted companies. Most families do not survive that. How the measurement works →
Insider transactions (Form 4)
| date | insider | what | shares | price | value |
|---|---|---|---|---|---|
| 2026-06-23 | Vieceli John S. Chief Product Officer | Open-market sale | 15.1K | 0.90 | 13.6K |
| 2026-06-23 | Hawkins Jeffrey Alan President & CEO | Open-market sale | 11.3K | 0.90 | 10.2K |
| 2026-06-23 | LaPointe Christian GC & Corp. Secretary | Open-market sale | 7.8K | 0.90 | 7.0K |
| 2026-06-23 | Keyes Jeffry R. Chief Financial Officer | Open-market sale | 4.1K | 0.90 | 3.7K |
| 2026-06-22 | Vieceli John S. Chief Product Officer | Open-market sale | 15.1K | 0.96 | 14.5K |
| 2026-06-22 | Hawkins Jeffrey Alan President & CEO | Open-market sale | 11.3K | 0.96 | 10.8K |
| 2026-06-22 | LaPointe Christian GC & Corp. Secretary | Open-market sale | 7.8K | 0.96 | 7.5K |
| 2026-06-22 | Keyes Jeffry R. Chief Financial Officer | Open-market sale | 4.1K | 0.96 | 3.9K |
| 2026-04-21 | Hawkins Jeffrey Alan President & CEO | Open-market sale | 83.7K | 0.99 | 83.3K |
| 2026-04-21 | Keyes Jeffry R. Chief Financial Officer | Open-market sale | 37.4K | 0.99 | 37.2K |
Open-market purchases (code P) are the informative ones. Grants, option exercises and tax withholding are compensation mechanics, not decisions. How to read a Form 4 →
Largest institutional holders
| manager | value | shares |
|---|---|---|
| BlackRock, Inc. | 10.4M | 13.4M |
| VANGUARD CAPITAL MANAGEMENT LLC | 5.4M | 7.0M |
| ARK Investment Management LLC | 5.3M | 6.9M |
| Amova Asset Management Americas, Inc. | 3.4M | 4.4M |
| Sumitomo Mitsui Trust Group, Inc. | 3.4M | 4.4M |
| GEODE CAPITAL MANAGEMENT, LLC | 3.0M | 3.8M |
| STATE STREET CORP | 2.9M | 3.8M |
| AQR CAPITAL MANAGEMENT LLC | 1.9M | 2.4M |
| UBS Group AG | 1.3M | 1.7M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1.2M | 1.5M |
13F positions as of 2026-03-31, filed up to 45 days after quarter end. Long-only US equity — shorts and derivatives never appear. What 13F does and does not show →
Latest SEC filings
| form | filed | period | |
|---|---|---|---|
| 10-Q | 2026-08-13 | 2026-06-30 | on EDGAR ↗ |
| 8-K | 2026-08-13 | 2026-08-13 | on EDGAR ↗ |
| SCHEDULE 13G/A | 2026-07-29 | — | on EDGAR ↗ |
| 8-K | 2026-07-24 | 2026-07-23 | on EDGAR ↗ |
| 4 | 2026-06-24 | 2026-06-22 | on EDGAR ↗ |
| 4 | 2026-06-24 | 2026-06-22 | on EDGAR ↗ |
| 4 | 2026-06-24 | 2026-06-22 | on EDGAR ↗ |
| 4 | 2026-06-24 | 2026-06-22 | on EDGAR ↗ |
Short selling
This is off-exchange short volume, not short interest: it is flow, not position, and 40–50% is normal because market makers short to fill your buy. Why that number misleads →
Recent headlines
- Quantum-Si (QSI) Q2 2026 Earnings Call Transcript · 2026-08-20
- Quantum-Si outlines Proteus launch shift to Q2 2027 while targeting $12M annual opex savings · 2026-08-14
- Quantum-Si GAAP EPS of -$0.11 beats by $0.01, revenue of $0.34M beats by $0.04M · 2026-08-13
- Quantum-si Inc (QSI) filed form 8-K · 2026-08-13 · SEC EDGAR
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