Vieceli John S. 4

What Happened
John S. Vieceli, Chief Product Officer of Quantum‑Si, was granted a total of 860,189 equity awards on March 12, 2026: 391,681 restricted stock units (RSUs) and 468,508 shares described as a derivative award. Both awards were reported at $0.00 per share (these are grants, not open‑market purchases or sales), so no cash changed hands at grant.

Key Details

• Transaction date: 2026-03-12; Form 4 filed 2026-03-16 (filed within the typical 2-business-day reporting window).
• Grants: 391,681 RSUs (F1) and 468,508 derivative shares/options (F2); combined = 860,189 awards. Reported price: $0.00 per share.
• Vesting: Both awards vest in 16 equal quarterly installments beginning June 20, 2026, subject to continued service through each vesting date (per footnotes F1 and F2).
• Shares owned after transaction: Not disclosed in the provided filing excerpt.
• Footnotes: F1 = RSUs convert to one share each upon vesting. F2 = the derivative award's underlying shares vest quarterly (per F2).
• Filing timeliness: Filing appears timely based on the provided dates.

Context
These are standard compensation grants to an executive and are recorded as awards (not purchases or sales). RSUs and similar derivative awards simply convert into shares as they vest and do not indicate an immediate market transaction. Retail investors should view such grants as part of long‑term compensation arrangements rather than a direct insider buy or sell signal.