Changes in Beneficial Ownership · 4
Quantum-Si Incorporated
Changes in Beneficial Ownership
Structured filing — 4
form4.xml
Filing details
- Report period
- 2026-09-21
- Issuer
- Quantum-Si Inc
- Issuer CIK
- 0001816431
- Trading symbol
- QSI
Reporting owner 1
- Name
- Hawkins Jeffrey Alan
- Reporting owner CIK
- 0001505034
- Relationship
- Director · Officer
- Officer title
- President & CEO
- Address
- C/O QUANTUM-SI INCORPORATED, 29 BUSINESS PARK DRIVE, BRANFORD, CT, 06405
Non-derivative transactions
| Security | Transaction date | Code | Amount | A / D | Price (USD) | Owned after | Ownership |
|---|---|---|---|---|---|---|---|
| Class A Common Stock | 2026-09-21 | S · Form 4[F1] | 20,143 | D | 0.7558[F2] | 3,649,659 | D |
| Class A Common Stock | 2026-09-22 | S · Form 4[F1] | 9,709 | D | 0.7608[F3] | 3,639,950 | D |
Table key
- S · Form 4
- Sale on the market or privately
- D
- Direct
Footnotes
- 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.↩ 1↩ 2
- F2
- Represents the weighted average sales price per share. The shares sold at prices ranging from $0.75 to $0.762 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.↩ 1
- F3
- Represents the weighted average sales price per share. The shares sold at prices ranging from $0.7511 to $0.7779 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.↩ 1
Signature 1
- Signed
- /s/ Christian LaPointe, Ph.D., Attorney-in-Fact.
- Date
- 2026-09-23
Company context
Quantum-Si is transforming proteomics with a benchtop platform that brings single-molecule protein analysis to every lab, everywhere. The Company’s platform enables real-time kinetic-based detection and allows researchers to move beyond traditional, multistep workflows and directly access dynamic, functional protein insights with unparalleled resolution. By making protein analysis simpler, faster, and more informative, Quantum-Si is accelerating proteomic discoveries to improve the way we live. Learn more at quantum-si.com or follow us on LinkedIn or X.
Current securities
Historical securities (6)
CAPANASDAQ · EQUITY · Historical · closed Jun 10, 2021CAPAUNASDAQ · UNIT · Historical · closed Jun 10, 2021CAPAWNASDAQ · WARRANT · Historical · closed Jun 10, 2021QSINASDAQ · EQUITY · Historical · closed Dec 22, 2021QSINASDAQ · EQUITY · Historical · closed Oct 19, 2026QSIAWNASDAQ · WARRANT · Historical · closed Jun 10, 2026