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Quantum-Si QSI

Quantum-Si Inc · Nasdaq · Measuring & Controlling Devices, NEC

$1.72+4.24%close on Oct. 28, 2026 · volume 9.9M · Yahoo Finance

Price, last 47 sessions

$0.75$1.00$1.25$1.50Sept. 2026Oct. 2026
Aug. 24, 2026 to Oct. 28, 2026 · high $1.72 · low $0.72 · SEC filing, placed when SEC released it

Our coverage

Nothing published yet.

Insider buying and selling

DateInsiderTradeSharesAvg. priceValue
Sept. 22, 2026Jeffrey Alan Hawkins
President & CEO, director
Sold9,709$0.76$7,387
Sept. 22, 2026Jeffry R. Keyes
Chief Financial Officer
Sold2,493$0.76$1,897
Sept. 22, 2026Christian LaPointe
GC & Corp. Secretary
Sold4,721$0.76$3,592
Sept. 21, 2026Jeffrey Alan Hawkins
President & CEO, director
Sold20,143$0.76$15,224
Sept. 21, 2026Jeffry R. Keyes
Chief Financial Officer
Sold5,172$0.76$3,909
Sept. 21, 2026Christian LaPointe
GC & Corp. Secretary
Sold9,795$0.76$7,403

Open-market purchases and sales reported on SEC Form 4 filed since July 24, 2026; grants, option exercises and shares withheld for tax aren't shown. A trade under a 10b5-1 plan was scheduled in advance. Where a filing was amended, the amendment's figures are shown.

Recent SEC filings

All 11 →
  • 8-KOct. 15, 2026, 9:15 a.m. ETView on SEC.gov

    Other events · Financial statements and exhibits

  • 8-KOct. 8, 2026, 4:12 p.m. ETView on SEC.gov

    Regulation FD disclosure · Financial statements and exhibits

    AI summary, unreviewedQuantum-Si Reports Demonstrated Detection of 19 of 20 Amino Acids in Proteus Development Program

  • 8-KSept. 28, 2026, 8:29 p.m. ETView on SEC.gov

    Regulation FD disclosure · Financial statements and exhibits

  • 4Sept. 23, 2026, 7:51 p.m. ETView on SEC.gov
  • 4Sept. 23, 2026, 7:45 p.m. ETView on SEC.gov
  • 4Sept. 23, 2026, 7:40 p.m. ETView on SEC.gov
  • SCHEDULE 13D/AAug. 28, 2026, 5:35 p.m. ETView on SEC.gov
  • 10-QAug. 13, 2026, 4:55 p.m. ETView on SEC.gov