QUANTUM SI INC

Ticker: QSI CUSIP: 74765K105 Class: Common Stock

Belvedere Trading LLC's Holding History (CIK: 0001632341)

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

Q3 2025

Shares 1,390 Value ($000) $2 Avg Close $1.45 Range $0.95 - $2.18

Q2 2025

Shares 7,222 Value ($000) $14 Avg Close $1.48 Range $1.02 - $2.15

Q4 2024

Shares 41,053 Value ($000) $111 Avg Close $1.17 Range $0.61 - $4.14

Q2 2021

Shares 4,406 Value ($000) $54 Avg Close $10.48 Range $7.85 - $13.23

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2025	1,390	$2	$1.45	$0.95 - $2.18
Q2 2025	7,222	$14	$1.48	$1.02 - $2.15
Q4 2024	41,053	$111	$1.17	$0.61 - $4.14
Q2 2021	4,406	$54	$10.48	$7.85 - $13.23