MAGNITE INC

Ticker: MGNI CUSIP: 55955D100 Class: Common Stock

PRIMECAP MANAGEMENT CO/CA/'s Holding History (CIK: 0000763212)

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

Q3 2021

Shares 266,500 Value ($000) $7,462 Avg Close $30.09 Range $24.01 - $36.59

Q2 2021

Shares 266,500 Value ($000) $9,018 Avg Close $33.88 Range $23.84 - $44.63

Q1 2021

Shares 300,000 Value ($000) $12,483 Avg Close $43.32 Range $22.65 - $64.39

Q4 2020

Shares 300,000 Value ($000) $9,213 Avg Close $15.13 Range $6.73 - $33.00

Q3 2020

Shares 300,000 Value ($000) $2,083 Avg Close $6.68 Range $5.57 - $8.29

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2021	266,500	$7,462	$30.09	$24.01 - $36.59
Q2 2021	266,500	$9,018	$33.88	$23.84 - $44.63
Q1 2021	300,000	$12,483	$43.32	$22.65 - $64.39
Q4 2020	300,000	$9,213	$15.13	$6.73 - $33.00
Q3 2020	300,000	$2,083	$6.68	$5.57 - $8.29