Quantum-Si CEO sells shares to cover taxes

Quantum-Si Inc President & CEO Jeffrey Alan Hawkins reported two open-market sales of Class A Common Stock tied to tax withholding.

Rhea-AI Filing Summary

Quantum-Si Inc President & CEO Jeffrey Alan Hawkins reported two open-market sales of Class A Common Stock tied to tax withholding. He sold 83,712 shares on April 20, 2026 at a weighted average price of $1.0064 per share and another 83,712 shares on April 21, 2026 at a weighted average price of $0.9950 per share. According to the disclosure, these transactions were executed under a mandatory sell-to-cover provision to satisfy federal, state and local withholding taxes triggered by the vesting of previously granted restricted stock units. After these sales, Hawkins directly owned 3,692,423 shares of Quantum-Si Class A Common Stock.

Insider Trade Summary

Net Seller: 167,424 shares

Net Sell 2 txns

Insider Hawkins Jeffrey Alan

Role President & CEO

Sold 167,424 shs ($168K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	83,712	$0.995	$83K
Sale	Class A Common Stock	83,712	$1.0064	$84K

Holdings After Transaction: Class A Common Stock — 3,692,423 shares (Direct)

Footnotes (3)

1. 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.
2. F2. Represents the weighted average sales price per share. The shares sold at prices ranging from $0.9811 to $1.05 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. F3. Represents the weighted average sales price per share. The shares sold at prices ranging from $0.9763 to $1.04 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.

Key Figures

Shares sold April 20, 2026: 83,712 shares at $1.0064 Shares sold April 21, 2026: 83,712 shares at $0.9950 Total shares sold: 167,424 shares +3 more

6 metrics

Shares sold April 20, 2026 83,712 shares at $1.0064 Open-market sale of Class A Common Stock

Shares sold April 21, 2026 83,712 shares at $0.9950 Open-market sale of Class A Common Stock

Total shares sold 167,424 shares Mandatory sell-to-cover for tax withholding

Post-transaction holdings 3,692,423 shares Direct Class A Common Stock owned after sales

Price range April 20 sale $0.9763–$1.04 Weighted average price $1.0064 per share

Price range April 21 sale $0.9811–$1.05 Weighted average price $0.9950 per share

Key Terms

sell-to-cover provision, restricted stock units, weighted average sales price, withholding taxes, +1 more

5 terms

sell-to-cover provision financial

"Represents shares sold pursuant to a mandatory Quantum-Si sell-to-cover provision for required federal, state and local withholding taxes"

restricted stock units financial

"withholding taxes in connection with the vesting of previously granted restricted stock units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

weighted average sales price financial

"Represents the weighted average sales price per share. The shares sold at prices ranging from $0.9811 to $1.05 per share."

withholding taxes financial

"required federal, state and local withholding taxes in connection with the vesting of previously granted restricted stock units"

Withholding taxes are amounts a payer or government takes out of payments — such as wages, interest, or dividends — before the recipient gets the money, functioning like a cashier keeping part of a bill to pay taxes on your behalf. For investors this matters because it reduces the cash they actually receive, affects net returns and yield calculations, and may require additional paperwork or treaty claims to recover or offset the withheld amount against final tax bills.

open-market sale financial

"transaction_action: open-market sale"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Quantum-Si (QSI) disclose for its CEO?

Quantum-Si reported that President & CEO Jeffrey Alan Hawkins sold 83,712 shares on April 20, 2026 and 83,712 shares on April 21, 2026, for mandatory tax withholding related to vesting restricted stock units.

How many Quantum-Si (QSI) shares did the CEO sell and at what prices?

Jeffrey Alan Hawkins sold a total of 167,424 Quantum-Si Class A shares. He sold 83,712 shares at a weighted average price of $1.0064 on April 20, 2026 and 83,712 shares at $0.9950 on April 21, 2026.

Why did the Quantum-Si (QSI) CEO sell shares in this Form 4 filing?

The filing states the sales were executed under a mandatory sell-to-cover provision. The transactions covered required federal, state and local withholding taxes arising from the vesting of previously granted restricted stock units.

How many Quantum-Si (QSI) shares does the CEO own after these transactions?

Following the reported sales, Jeffrey Alan Hawkins directly owned 3,692,423 shares of Quantum-Si Class A Common Stock. This post-transaction holding reflects his remaining direct equity stake after the mandatory tax-related share sales.

Were the Quantum-Si (QSI) CEO’s share sales discretionary open-market trades?

The filing explains that the sales occurred under a mandatory sell-to-cover provision set at the grant date of the related restricted stock unit awards, meaning Hawkins could not alter these tax-driven transactions.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Accepted by SEC EDGAR 04/22/2026 - 05:02 PM EDT Learn about SEC filing dates

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
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Hawkins Jeffrey Alan

(Last) (First) (Middle)

C/O QUANTUM-SI INCORPORATED

29 BUSINESS PARK DRIVE

(Street)

BRANFORD, CONNECTICUT 06405

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/20/2026

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

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

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

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	04/20/2026		S(1)		83,712	D	$1.0064(2)	3,776,135	D
Class A Common Stock	04/21/2026		S(1)		83,712	D	$0.995(3)	3,692,423	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 $0.9811 to $1.05 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 $0.9763 to $1.04 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.	04/22/2026
	** 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.
* Form 4: SEC 1474 (03-26)