QUANTUM SI INC

Ticker: QSI CUSIP: 74765K105 Class: Common Stock

MARK SHEPTOFF FINANCIAL PLANNING, LLC's Holding History (CIK: 0001607355)

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

Q3 2025
Shares 10,500 Value ($000) $15 Avg Close $1.45 Range $0.95 - $2.18
Q2 2025
Shares 14,500 Value ($000) $28 Avg Close $1.48 Range $1.02 - $2.15
Q1 2025
Shares 14,500 Value ($000) $17 Avg Close $1.92 Range $1.12 - $5.77
Q4 2024
Shares 7,000 Value ($000) $19 Avg Close $1.17 Range $0.61 - $4.14