Quantum-Si incorporated (QSI) ownership: Top institutional holder: VANGUARD GROUP INC ($10.57M). Insider activity: Net Seller (0 buys, 20 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 9607022.00 | $10.57M | 2025-12-31 |
| BlackRock, Inc. | 13414949.00 | $10.38M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 7021907.00 | $5.43M | 2026-03-31 |
| ARK Investment Management LLC | 6878899.00 | $5.32M | 2026-03-31 |
| Amova Asset Management Americas, Inc. | 4391666.00 | $3.43M | 2026-03-31 |
| Sumitomo Mitsui Trust Group, Inc. | 4391666.00 | $3.40M | 2026-03-31 |
| GEODE CAPITAL MANAGEMENT, LLC | 3835121.00 | $2.97M | 2026-03-31 |
| STATE STREET CORP | 3770689.00 | $2.92M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-18 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.