STOCK TITAN

Quantum-Si (QSI) CEO executes mandatory sell-to-cover on 22,621 vested shares

Filing Impact
(Neutral)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Quantum-Si Inc President & CEO Jeffrey Alan Hawkins reported routine share sales tied to tax withholding on vested equity. On two days, he sold a total of 22,621 shares of Class A Common Stock in open-market transactions under a mandatory sell-to-cover provision for federal, state and local taxes related to previously granted restricted stock units. The sales occurred at weighted average prices around $0.96 and $0.90 per share, and he held 3,669,802 shares directly after the transactions.

Positive

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Insider Hawkins Jeffrey Alan
Role President & CEO
Sold 22,621 shs ($21K)
Type Security Shares Price Value
Sale Class A Common Stock 11,311 $0.899 $10K
Sale Class A Common Stock 11,310 $0.9574 $11K
Holdings After Transaction: Class A Common Stock — 3,669,802 shares (Direct, null)
Footnotes (1)
  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. Represents the weighted average sales price per share. The shares sold at prices ranging from $0.9212 to $1.005 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. Represents the weighted average sales price per share. The shares sold at prices ranging from $0.88 to $0.9291 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.
Shares sold 2026-06-22 11,310 shares Open-market sale of Class A Common Stock at $0.9574 per share
Shares sold 2026-06-23 11,311 shares Open-market sale of Class A Common Stock at $0.8990 per share
Total shares sold 22,621 shares Combined shares sold across two open-market transactions
Holdings after transactions 3,669,802 shares Direct holdings of Class A Common Stock following sales
Sale price range 2026-06-22 $0.9212–$1.005 per share Prices underlying weighted average of $0.9574 per share
Sale price range 2026-06-23 $0.88–$0.9291 per share Prices underlying weighted average of $0.8990 per share
sell-to-cover financial
"Represents shares sold pursuant to a mandatory Quantum-Si sell-to-cover provision for required federal, state and local withholding taxes"
Sell-to-cover is when part of newly issued or exercised company stock is immediately sold to pay required taxes and fees, so the recipient keeps the remaining shares. For investors this matters because it reduces the number of shares insiders or employees actually hold after a grant, can create small, routine share sales that aren’t signal of cashing out, and slightly increases share supply on the market—like selling a portion of a paycheck to cover the tax bill.
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 per share financial
"Represents the weighted average sales price per share. The shares sold at prices ranging"
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.
withholding taxes financial
"for required federal, state and local withholding taxes in connection with the vesting"
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.
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SEC Form 4
FORM 4UNITED 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)
XDirector10% Owner
XOfficer (give title below)Other (specify below)
President & CEO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/22/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Class A Common Stock06/22/2026S(1)11,310D$0.9574(2)3,681,113D
Class A Common Stock06/23/2026S(1)11,311D$0.899(3)3,669,802D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount 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 $0.9212 to $1.005 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 $0.88 to $0.9291 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.06/24/2026
** Signature of Reporting PersonDate
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)

FAQ

What insider transaction did Quantum-Si (QSI) disclose for Jeffrey Alan Hawkins?

Quantum-Si disclosed that President & CEO Jeffrey Alan Hawkins sold 22,621 shares of Class A Common Stock in two open-market transactions. These sales were connected to tax withholding on vested restricted stock units under a mandatory sell-to-cover provision.

On what dates did the Quantum-Si (QSI) CEO’s reported share sales occur?

The reported share sales by Quantum-Si President & CEO Jeffrey Alan Hawkins occurred on June 22, 2026 and June 23, 2026. Each date involved a separate open-market sale of Class A Common Stock associated with tax withholding on restricted stock unit vesting.

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

Jeffrey Alan Hawkins sold 11,310 Quantum-Si Class A Common shares at a weighted average price per share of $0.9574 and 11,311 shares at a weighted average price per share of $0.8990. Both transactions were open-market sales tied to tax withholding obligations.

Why were the Quantum-Si (QSI) CEO’s share sales described as mandatory?

The sales were described as mandatory because they were executed under a Quantum-Si sell-to-cover provision. This provision automatically sells shares to satisfy required federal, state and local withholding taxes when previously granted restricted stock units vest, and the individual cannot change this mechanism.

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

After the reported transactions, Quantum-Si President & CEO Jeffrey Alan Hawkins directly held 3,669,802 shares of Class A Common Stock. This post-transaction figure shows his remaining equity position following the mandatory sell-to-cover sales for tax withholding.

Were the Quantum-Si (QSI) CEO’s reported share sales discretionary trading decisions?

The filing indicates the sales were not discretionary trades. They were executed pursuant to a mandatory Quantum-Si sell-to-cover provision, designed to cover required federal, state and local withholding taxes triggered by the vesting of previously granted restricted stock units.