| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Vieceli John S. | Chief Product Officer | C/O QUANTUM-SI INCORPORATED, 29 BUSINESS PARK DRIVE, BRANFORD | /s/ Christian LaPointe, Ph.D., Attorney-in-Fact. | 2025-09-24 | 0002032947 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | QSI | Class A Common Stock | Sale | -$16.6K | -9.84K | -1.17% | $1.68 | 833K | Sep 22, 2025 | Direct | F1, F2 |
| transaction | QSI | Class A Common Stock | Sale | -$16.1K | -9.84K | -1.18% | $1.64 | 823K | Sep 23, 2025 | Direct | F1, F3 |
| Id | Content |
|---|---|
| F1 | Represents shares sold pursuant to a mandatory Quantum-Si sell-to-cover provision for required federal, state and local withholding taxes in connection with the vesting of previously granted restricted stock units. Individual is not able to alter this mandatory sell-to-cover provision that is enacted at the grant date of the related restricted stock unit award. |
| F2 | Represents the weighted average sales price per share. The shares sold at prices ranging from $1.64 to $1.72 per share. Full information regarding the number of shares sold at each price shall be provided upon request to the staff of the U.S. Securities and Exchange Commission, the Issuer, or a security holder of the Issuer. |
| F3 | Represents the weighted average sales price per share. The shares sold at prices ranging from $1.57 to $1.79 per share. Full information regarding the number of shares sold at each price shall be provided upon request to the staff of the U.S. Securities and Exchange Commission, the Issuer, or a security holder of the Issuer. |