MAGNITE INC

Ticker: MGNI CUSIP: 55955D100 Class: Common Stock

Optiver Holding B.V.'s Holding History (CIK: 0001859606)

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

Q4 2025

Shares 196 Value ($000) $3 Avg Close $16.60 Range $13.07 - $22.14

Q3 2025

Shares 424 Value ($000) $9 Avg Close $23.61 Range $20.72 - $26.65

Q2 2025

Shares 592 Value ($000) $14 Avg Close $14.73 Range $8.22 - $24.46

Q1 2025

Shares 592 Value ($000) $7 Avg Close $15.94 Range $10.86 - $21.29

Q4 2024

Shares 592 Value ($000) $9 Avg Close $14.67 Range $11.34 - $18.38

Q3 2024

Shares 203 Value ($000) $3 Avg Close $13.63 Range $10.36 - $15.92

Q2 2024

Shares 1,744 Value ($000) $23 Avg Close $10.93 Range $8.38 - $14.02

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	196	$3	$16.60	$13.07 - $22.14
Q3 2025	424	$9	$23.61	$20.72 - $26.65
Q2 2025	592	$14	$14.73	$8.22 - $24.46
Q1 2025	592	$7	$15.94	$10.86 - $21.29
Q4 2024	592	$9	$14.67	$11.34 - $18.38
Q3 2024	203	$3	$13.63	$10.36 - $15.92
Q2 2024	1,744	$23	$10.93	$8.38 - $14.02