Question 1

How many shares of MGNI does PRIMECAP MANAGEMENT CO/CA/ own?

Accepted Answer

PRIMECAP MANAGEMENT CO/CA/ previously held 0 shares of MGNI (MAGNITE INC) before exiting the position in 2021-Q4.

Question 2

What is PRIMECAP MANAGEMENT CO/CA/'s MGNI position worth?

Accepted Answer

PRIMECAP MANAGEMENT CO/CA/'s MGNI position was last reported at $0 in 2021-Q4 before the exit.

Question 3

Is PRIMECAP MANAGEMENT CO/CA/ buying or selling MGNI?

Accepted Answer

In 2021-Q4, PRIMECAP MANAGEMENT CO/CA/ exited their MGNI position entirely (-100.0% change in shares).

Question 4

When did PRIMECAP MANAGEMENT CO/CA/ first buy MGNI?

Accepted Answer

Based on available 13F filings, PRIMECAP MANAGEMENT CO/CA/ first reported a position in MGNI in 2020-Q3. They have held the position across 6 quarters.

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2021-Q4 Latest	Exited	0	-100.0%	$0	0.0%	$17.94	0
2021-Q3	Unchanged	266,500	0.0%	$7.5M	0.0%	$27.68	0
2021-Q2	Decreased	266,500	-11.2%	$9M	0.0%	$36.93	0
2021-Q1	Unchanged	300,000	0.0%	$12.5M	0.0%	$40.66	0
2020-Q4	Unchanged	300,000	0.0%	$9.2M	0.0%	$31.30	0
2020-Q3	New	300,000	-	$2.1M	0.0%	$6.67	36

MGNI6 quarters

MGNI
6 quarters