QUANTUM SI INC

Ticker: QSI CUSIP: 74765K105 Class: Common Stock

SIMPLEX TRADING, LLC's Holding History (CIK: 0001488542)

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

Q4 2025
Shares 80,507 Value ($000) $89 Avg Close $1.63 Range $1.07 - $3.10
Q3 2025
Shares 154,083 Value ($000) $0 Avg Close $1.45 Range $0.95 - $2.18
Q2 2025
Shares 105,534 Value ($000) $0 Avg Close $1.48 Range $1.02 - $2.15
Q1 2025
Shares 42,909 Value ($000) $0 Avg Close $1.92 Range $1.12 - $5.77
Q4 2024
Shares 306,769 Value ($000) $1 Avg Close $1.17 Range $0.61 - $4.14
Q3 2024
Shares 26,499 Value ($000) $0 Avg Close $0.97 Range $0.79 - $1.26
Q2 2023
Shares 9,322 Value ($000) $0 Avg Close $1.57 Range $1.36 - $1.94
Q1 2023
Shares 5,279 Value ($000) $0 Avg Close $1.97 Range $1.54 - $2.63
Q4 2022
Shares 18,847 Value ($000) $0 Avg Close $2.58 Range $1.72 - $3.61
Q3 2021
Shares 25,880 Value ($000) $312 Avg Close $9.85 Range $7.43 - $14.17
Q2 2021
Shares 27,290 Value ($000) $334 Avg Close $10.48 Range $7.85 - $13.23