Quantum Computing, Inc. (QUBT) ownership: Top institutional holder: VANGUARD GROUP INC ($172.79M). Insider activity: Net Seller (0 buys, 9 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 16841423.00 | $172.79M | 2025-12-31 |
| BlackRock, Inc. | 16139212.00 | $110.55M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 8762295.00 | $60.02M | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 6710124.00 | $45.96M | 2026-03-31 |
| GEODE CAPITAL MANAGEMENT, LLC | 4700305.00 | $32.20M | 2026-03-31 |
| STATE STREET CORP | 4516820.00 | $30.94M | 2026-03-31 |
| Defiance ETFs, LLC | 4495083.00 | $30.79M | 2026-03-31 |
| Marex Group plc | 4488912.00 | $30.75M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-04-13 | |
| Sell | null | 2026-04-13 | |
| Sell | null | 2026-04-13 | |
| Sell | null | 2026-04-13 | |
| Sell | null | 2026-04-13 | |
| Sell | null | 2026-03-11 | |
| Sell | null | 2026-03-10 | |
| Sell | null | 2026-03-10 |
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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.