QUANTUM SI INC

Ticker: QSI CUSIP: 74765K105 Class: Common Stock

HRT FINANCIAL LP's Holding History (CIK: 0001475597)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 104,292 Value ($000) $0 Avg Close $1.63 Range $1.07 - $3.10

Q4 2023

Shares 45,313 Value ($000) $0 Avg Close $1.52 Range $1.12 - $2.31

Q2 2022

Shares 378,494 Value ($000) $878 Avg Close $3.83 Range $2.22 - $4.97

Q1 2022

Shares 63,057 Value ($000) $295 Avg Close $4.87 Range $3.72 - $8.30

Q4 2021

Shares 263,314 Value ($000) $2,072 Avg Close $7.53 Range $5.33 - $9.10

Q2 2021

Shares 373,868 Value ($000) $4,583 Avg Close $10.48 Range $7.85 - $13.23

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	104,292	$0	$1.63	$1.07 - $3.10
Q4 2023	45,313	$0	$1.52	$1.12 - $2.31
Q2 2022	378,494	$878	$3.83	$2.22 - $4.97
Q1 2022	63,057	$295	$4.87	$3.72 - $8.30
Q4 2021	263,314	$2,072	$7.53	$5.33 - $9.10
Q2 2021	373,868	$4,583	$10.48	$7.85 - $13.23