QUANTUM SI INC

Ticker: QSI CUSIP: 74765K105 Class: Common Stock

Mariner, LLC's Holding History (CIK: 0001373442)

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

Q4 2025

Shares 56,880 Value ($000) $63 Avg Close $1.63 Range $1.07 - $3.10

Q3 2025

Shares 50,529 Value ($000) $71 Avg Close $1.45 Range $0.95 - $2.18

Q2 2025

Shares 50,594 Value ($000) $99 Avg Close $1.48 Range $1.02 - $2.15

Q1 2025

Shares 48,005 Value ($000) $58 Avg Close $1.92 Range $1.12 - $5.77

Q4 2024

Shares 33,439 Value ($000) $90 Avg Close $1.17 Range $0.61 - $4.14

Q3 2024

Shares 25,899 Value ($000) $23 Avg Close $0.97 Range $0.79 - $1.26

Q3 2023

Shares 11,263 Value ($000) $19 Avg Close $2.41 Range $1.57 - $3.90

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	56,880	$63	$1.63	$1.07 - $3.10
Q3 2025	50,529	$71	$1.45	$0.95 - $2.18
Q2 2025	50,594	$99	$1.48	$1.02 - $2.15
Q1 2025	48,005	$58	$1.92	$1.12 - $5.77
Q4 2024	33,439	$90	$1.17	$0.61 - $4.14
Q3 2024	25,899	$23	$0.97	$0.79 - $1.26
Q3 2023	11,263	$19	$2.41	$1.57 - $3.90