Ph.D. Christian LaPointe - 12 Mar 2026 Form 4 Insider Report for Quantum-Si Inc (QSI)

Role: GC & Corp. Secretary
Signature: /s/ Christian LaPointe, Ph.D.
Issuer symbol: QSI
Transactions as of: 12 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 16 Mar 2026, 16:06:32 UTC
Previous filing: 22 Dec 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
LaPointe Christian	GC & Corp. Secretary	C/O QUANTUM-SI INCORPORATED, 29 BUSINESS PARK DRIVE, BRANFORD	/s/ Christian LaPointe, Ph.D.	16 Mar 2026	0001856912

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	QSI	Class A Common Stock	Award		+261,121	+28%	$0.000000^*	1,209,976	12 Mar 2026	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	QSI	Stock Option (Right to Buy)	Award		+312,339		$0.000000^*	312,339	12 Mar 2026	Class A Common Stock	312,339	$0.9760	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The grant consists of restricted stock units ("RSUs"). Each RSU represents the right to receive one share of common stock upon vesting. The RSUs shall vest in 16 equal quarterly installments beginning on June 20, 2026 until fully vested, subject to continued service through the applicable vesting date.
F2	The shares underlying this option shall vest in equal quarterly installments beginning on June 20, 2026 until fully vested, subject to continued service through the applicable vesting dates.