John S. Vieceli - 22 Dec 2025 Form 4 Insider Report for Quantum-Si Inc (QSI)

Role
Chief Product Officer
Signature
/s/ Christian LaPointe, Ph.D., Attorney-in-Fact
Issuer symbol
QSI
Transactions as of
22 Dec 2025
Net transactions value
-$27,979
Form type
4
Filing time
22 Dec 2025, 20:11:48 UTC
Previous filing
24 Sep 2025
SEC
View on sec.gov

Reporting Owners (1)

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 22 Dec 2025 0002032947

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction QSI Class A Common Stock Sale $27,979 -21,927 -2.7% $1.28 800,973 22 Dec 2025 Direct F1, F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

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 $1.260 to $1.310 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.