QUANTUM CORP

Ticker: QMCO CUSIP: 747906600 Class: Stock

MARSHALL WACE, LLP's Holding History (CIK: 0001318757)

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

Q4 2025

Shares 21,740 Value ($000) $140 Avg Close $8.97 Range $6.22 - $15.33

Q2 2025

Shares 178,021 Value ($000) $1,775 Avg Close $11.05 Range $7.25 - $15.30

Q4 2024

Shares 6,188 Value ($000) $334 Avg Close $14.51 Range $2.88 - $90.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	21,740	$140	$8.97	$6.22 - $15.33
Q2 2025	178,021	$1,775	$11.05	$7.25 - $15.30
Q4 2024	6,188	$334	$14.51	$2.88 - $90.64