Were the Quantum-Si (QSI) CFO share sales discretionary open-market trades?

The disclosure characterizes these as sales under a mandatory sell-to-cover provision linked to restricted stock unit vesting and tax withholding. The footnote states the individual cannot alter this provision, distinguishing these transactions from discretionary open-market selling.

What share price range is disclosed for the Quantum-Si (QSI) CFO’s June 2026 sales?

Footnotes state the weighted average prices reflect sales executed between $0.9212 and $1.005 per share for one transaction and between $0.88 and $0.9291 per share for the other. Detailed breakdowns are available upon request to specified parties.

Quantum-Si (QSI) CFO offloads 8,233 shares in mandatory tax sell-to-cover

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

Quantum-Si Inc Chief Financial Officer Jeffry R. Keyes reported sales of a total of 8,233 shares of Class A Common Stock on June 22 and 23, 2026. According to the disclosure, these transactions were executed under a mandatory sell-to-cover provision to satisfy federal, state and local tax withholding on vested restricted stock units. Following the sales, he directly holds 1,724,349 shares of Class A Common Stock.

Insider Trade Summary

Net Seller: 8,233 shares ($7,642)

Net Sell 2 txns

Insider Keyes Jeffry R.

Role Chief Financial Officer

Sold 8,233 shs ($8K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	4,117	$0.899	$4K
Sale	Class A Common Stock	4,116	$0.9574	$4K

Holdings After Transaction: Class A Common Stock — 1,724,349 shares (Direct, null)

Footnotes (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.

Key Figures

Shares sold total: 8,233 shares First sale size: 4,116 shares First sale price: $0.9574 per share +5 more

8 metrics

Shares sold total 8,233 shares Net shares sold in June 22–23, 2026 transactions

First sale size 4,116 shares Class A Common Stock sold on June 22, 2026

First sale price $0.9574 per share Weighted average price for June 22, 2026 sale

Second sale size 4,117 shares Class A Common Stock sold on June 23, 2026

Second sale price $0.8990 per share Weighted average price for June 23, 2026 sale

Price range (first sale) $0.9212–$1.005 per share Disclosed trading range for one transaction

Price range (second sale) $0.88–$0.9291 per share Disclosed trading range for the other transaction

Shares held after 1,724,349 shares Direct Class A Common Stock ownership after transactions

Key Terms

sell-to-cover provision, restricted stock units, weighted average sales price, Class A Common Stock, +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"

Class A Common Stock financial

"security_title": "Class A Common Stock""

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

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.

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

Add on Google

Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/24/2026 - 08:23 PM Accepted by SEC EDGAR 06/24/2026 - 08:23 PM

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^*

Keyes Jeffry R.

(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)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	Chief Financial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/22/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Class A Common Stock	06/22/2026		S⁽¹⁾		4,116	D	$0.9574⁽²⁾	1,728,466	D
Class A Common Stock	06/23/2026		S⁽¹⁾		4,117	D	$0.899⁽³⁾	1,724,349	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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 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)

Source: View Original Filing on SEC EDGAR

FAQ

What did Quantum-Si (QSI) CFO Jeffry Keyes report in this Form 4?

Quantum-Si CFO Jeffry Keyes reported selling 8,233 shares of Class A Common Stock on June 22 and 23, 2026. The disclosure states these sales were under a mandatory sell-to-cover provision tied to tax withholding on vested restricted stock units.

Why did Quantum-Si (QSI) CFO Jeffry Keyes sell shares in June 2026?

The filing explains the shares were sold under a mandatory sell-to-cover provision for federal, state and local tax withholding. This provision applies when previously granted restricted stock units vest, and the individual cannot change or opt out of this mechanism.

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

Jeffry Keyes sold 4,116 shares at a weighted average price of $0.9574 per share and 4,117 shares at $0.8990 per share. Footnotes note actual prices ranged from $0.88 to $1.005 per share across the reported transactions.

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

After the reported June 2026 transactions, Jeffry Keyes directly holds 1,724,349 shares of Quantum-Si Class A Common Stock. This figure is provided in the Form 4 as the total direct ownership following the mandatory sell-to-cover sales.