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▼ SELL

$ Value

$4K

Shares

4,233

Price

$1

Filed

Mar 24

Insider

Name

Keyes Jeffry R.

Title

Chief Financial Officer

CIK

0001557736

Roles

Officer

Transaction Details

Transaction Date

2026-03-20

Code

S

Table

Non-Derivative

Ownership

Direct

Equity Swap

No

Shares After

1,811,767

Footnotes

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 $0.8314 to $0.8718 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 $0.7973 to $0.8525 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.

Filing Info

Accession No.

0001140361-26-010949

Form Type

4

Issuer CIK

0001816431

Keyes Jeffry R.'s History

Date Ticker Type Value
2026-04-21 QSI $37K
2026-04-20 QSI $38K
2026-03-23 QSI $4K
2026-03-20 QSI $4K
2025-06-23 QSI $14K

Other Insiders at QSI (90d)

Insider Bought Sold Last
Hawkins Jeffrey Alan
President & CEO
$187K 2026-04-21
Keyes Jeffry R.
Chief Financial Officer
$78K 2026-04-21
LaPointe Christian
GC & Corp. Secretary
$10K 2026-03-23
Vieceli John S.
Chief Product Officer
$18K 2026-03-23