QUANTUM SI INC

Ticker: QSI CUSIP: 74765K105 Class: Common Stock

TWO SIGMA SECURITIES, LLC's Holding History (CIK: 0001450144)

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

Q2 2025

Shares 37,861 Value ($000) $74 Avg Close $1.48 Range $1.02 - $2.15

Q1 2025

Shares 52,220 Value ($000) $63 Avg Close $1.92 Range $1.12 - $5.77

Q1 2024

Shares 26,878 Value ($000) $53 Avg Close $1.75 Range $1.38 - $2.43

Q3 2022

Shares 11,983 Value ($000) $33 Avg Close $3.20 Range $2.31 - $4.43

Q1 2022

Shares 10,826 Value ($000) $51 Avg Close $4.87 Range $3.72 - $8.30

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2025	37,861	$74	$1.48	$1.02 - $2.15
Q1 2025	52,220	$63	$1.92	$1.12 - $5.77
Q1 2024	26,878	$53	$1.75	$1.38 - $2.43
Q3 2022	11,983	$33	$3.20	$2.31 - $4.43
Q1 2022	10,826	$51	$4.87	$3.72 - $8.30