QUANTUM SI INC

Ticker: QSI CUSIP: 74765K105 Class: Common Stock

NORTHERN TRUST CORP's Holding History (CIK: 0000073124)

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

Q4 2025
Shares 2,207,936 Value ($000) $2,429 Avg Close $1.63 Range $1.07 - $3.10
Q3 2025
Shares 2,323,042 Value ($000) $3,275 Avg Close $1.45 Range $0.95 - $2.18
Q2 2025
Shares 2,289,456 Value ($000) $4,487 Avg Close $1.48 Range $1.02 - $2.15
Q1 2025
Shares 1,022,118 Value ($000) $1,227 Avg Close $1.92 Range $1.12 - $5.77
Q4 2024
Shares 841,146 Value ($000) $2,271 Avg Close $1.17 Range $0.61 - $4.14
Q3 2024
Shares 801,120 Value ($000) $707 Avg Close $0.97 Range $0.79 - $1.26
Q2 2024
Shares 782,190 Value ($000) $821 Avg Close $1.60 Range $0.73 - $1.99
Q1 2024
Shares 822,339 Value ($000) $1,620 Avg Close $1.75 Range $1.38 - $2.43
Q4 2023
Shares 824,387 Value ($000) $1,657 Avg Close $1.52 Range $1.12 - $2.31
Q3 2023
Shares 822,762 Value ($000) $1,366 Avg Close $2.41 Range $1.57 - $3.90
Q2 2023
Shares 778,842 Value ($000) $1,394 Avg Close $1.57 Range $1.36 - $1.94
Q1 2023
Shares 742,477 Value ($000) $1,307 Avg Close $1.97 Range $1.54 - $2.63
Q4 2022
Shares 771,007 Value ($000) $1,411 Avg Close $2.58 Range $1.72 - $3.61
Q3 2022
Shares 772,579 Value ($000) $2,124 Avg Close $3.20 Range $2.31 - $4.43
Q2 2022
Shares 774,618 Value ($000) $1,797 Avg Close $3.83 Range $2.22 - $4.97
Q1 2022
Shares 164,881 Value ($000) $772 Avg Close $4.87 Range $3.72 - $8.30
Q4 2021
Shares 168,878 Value ($000) $1,329 Avg Close $7.53 Range $5.33 - $9.10
Q3 2021
Shares 144,933 Value ($000) $1,209 Avg Close $9.85 Range $7.43 - $14.17