Question 1

How many shares of MGNI does BlackRock, Inc. own?

Accepted Answer

As of 2026-Q2, BlackRock, Inc. holds 12.7M shares of MGNI (MAGNITE INC).

Question 2

What is BlackRock, Inc.'s MGNI position worth?

Accepted Answer

As of 2026-Q2, BlackRock, Inc.'s MGNI position is worth $241.3M.

Question 3

Is BlackRock, Inc. buying or selling MGNI?

Accepted Answer

In 2026-Q2, BlackRock, Inc. increased their MGNI position (+9.1% change in shares).

Question 4

When did BlackRock, Inc. first buy MGNI?

Accepted Answer

Based on available 13F filings, BlackRock, Inc. first reported a position in MGNI in 2024-Q4. They have held the position across 7 quarters.

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q2 Latest	Increased	12.7M	+9.1%	$241.3M	0.0%	$18.98	34
2026-Q1	Increased	11.7M	+0.6%	$138.5M	0.0%	$13.77	30
2025-Q4	Increased	11.6M	+1.6%	$188.2M	0.0%	$16.46	31
2025-Q3	Increased	11.4M	+6.7%	$248.6M	0.0%	$22.28	33
2025-Q2	Increased	10.7M	+9.3%	$258M	0.0%	$21.10	34
2025-Q1	Decreased	9.8M	-3.7%	$111.7M	0.0%	$11.60	0
2024-Q4	New	10.2M	-	$161.9M	0.0%	$16.41	42

MGNI7 quarters

MGNI
7 quarters