[Form 4] Quantum-Si Inc Insider Trading Activity

Rhea-AI Filing Summary

Jeffrey Alan Hawkins, President & CEO and a director of Quantum-Si Inc. (QSI), reported two routine stock sales to cover taxes related to vested restricted stock units. On 09/22/2025 he sold 10,643 shares at a weighted average price of $1.6826, reducing his beneficial ownership to 2,612,368 shares. On 09/23/2025 he sold an additional 10,643 shares at a weighted average price of $1.635, reducing his beneficial ownership to 2,601,725 shares. The filings state these sales were mandatory sell-to-cover transactions for required federal, state and local withholding taxes tied to vested RSUs and that the reporter could not alter the sell-to-cover provision.

Positive

• Transaction disclosure is timely and detailed, including weighted average prices and post-transaction beneficial ownership
• Sales were mandatory sell-to-cover for RSU tax withholding, indicating transactions were not discretionary open-market dispositions

Negative

• Beneficial ownership decreased by 21,286 shares (from 2,623,011 implied to 2,601,725 following the reported sales)

Insights

Financial Analyst

TL;DR: Routine sell-to-cover transactions by CEO reduced his share count modestly; no new options or derivative activity reported.

The Form 4 discloses two consecutive sell-to-cover transactions totaling 21,286 shares across 09/22/2025 and 09/23/2025 at weighted average prices of $1.6826 and $1.635 respectively. These sales were executed to satisfy tax withholding on vested restricted stock units and are described as mandatory under the award terms. Following the trades, Hawkins' reported beneficial ownership decreased from 2,623,011 (implicit) to 2,601,725 shares. There is no indication of additional derivative exercises or discretionary open-market sales.

Corporate Governance Expert

TL;DR: Disclosure aligns with standard governance practice for mandatory sell-to-cover on RSU vesting; signature by attorney-in-fact is properly included.

The filing explicitly states the sales were mandated by the RSU award's sell-to-cover provision and notes the reporting person cannot alter that provision. The Form 4 is signed by an attorney-in-fact, which is acceptable when properly authorized. The issuer and reporter provided weighted average sale prices and offered to provide complete per-price share breakdowns upon request to the SEC staff or shareholders, satisfying transparency expectations for insider transactions.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

Hawkins Jeffrey Alan

(Last) (First) (Middle)

C/O QUANTUM-SI INCORPORATED

29 BUSINESS PARK DRIVE

(Street)

BRANFORD CT 06405

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Quantum-Si Inc [ QSI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President & CEO

3. Date of Earliest Transaction (Month/Day/Year)
09/22/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	09/22/2025		S(1)		10,643	D	$1.6826(2)	2,612,368	D
Class A Common Stock	09/23/2025		S(1)		10,643	D	$1.635(3)	2,601,725	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. 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.

2. 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.

3. 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.

	/s/ Christian LaPointe, Ph.D., Attorney-in-Fact.	09/24/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did QSI insider Jeffrey Hawkins sell on 09/22–09/23/2025?

He sold a total of 21,286 Class A common shares in two mandatory sell-to-cover transactions: 10,643 on 09/22/2025 and 10,643 on 09/23/2025.

Why were the QSI shares sold by the reporting person?

The sales were mandatory sell-to-cover transactions to satisfy required federal, state and local tax withholding on vested restricted stock units.

At what prices were the QSI shares sold?

The weighted average sale prices were $1.6826 (shares sold ranged $1.64–$1.72) and $1.635 (shares sold ranged $1.57–$1.79).

How many QSI shares did Hawkins own after the transactions?

After the 09/22 sale his beneficial ownership was reported as 2,612,368 shares; after the 09/23 sale it was 2,601,725 shares.

Was the Form 4 signed properly?

Yes; the Form 4 contains the signature of an attorney-in-fact, Christian LaPointe, Ph.D., dated 09/24/2025, as indicated in the filing.