A detailed history of Group One Trading, L.P. transactions in Quantum Si Inc stock. As of the latest transaction made, Group One Trading, L.P. holds 134,632 shares of QSI stock, worth $320,424. This represents 0.01% of its overall portfolio holdings.

Number of Shares
134,632
Holding current value
$320,424
% of portfolio
0.01%

Shares

5 transactions
Quarter Operation Price Per share shares change shares Held SEC Form
Q2 2025

Aug 13, 2025

BUY
$1.08 - $2.05 $145,402 - $275,995
134,632 New
134,632 $263,000
Q2 2023

Aug 09, 2023

BUY
$1.38 - $1.83 $2,208 - $2,928
1,600 Added 102.96%
3,154 $5,000
Q1 2023

May 12, 2023

BUY
$1.59 - $2.58 $2,470 - $4,009
1,554 New
1,554 $2,000
Q3 2021

Nov 12, 2021

SELL
$7.97 - $13.56 $219,175 - $372,900
-27,500 Closed
0 $0
Q2 2021

Aug 10, 2021

BUY
$8.1 - $12.65 $222,750 - $347,875
27,500 New
27,500 $337,000

Others Institutions Holding QSI

About Quantum-Si Inc


  • Ticker QSI
  • Exchange NASDAQ
  • Sector Healthcare
  • Industry Biotechnology
  • Shares Outstandng 119,433,000
  • Market Cap $284M
  • Description
  • Quantum-Si incorporated, a life sciences company, develops a single molecule detection platform for sample preparation and sequencing. It offers a proprietary single molecule detection platform for use in semiconductor industry to field proteomics to enable next generation protein sequencing. The company was incorporated in 2013 is based in Guil...
More about QSI
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