Question 1

Does Boston Partners own MGNI stock?

Accepted Answer

Yes. As of its Q2 2026 13F, Boston Partners holds 5,013,835 shares of MGNI (Magnite), worth $95.9M.

Question 2

How many shares of MGNI does Boston Partners own?

Accepted Answer

As of its Q2 2026 13F, Boston Partners holds 5,013,835 shares of MGNI (Magnite).

Question 3

What is Boston Partners' MGNI position worth?

Accepted Answer

As of its Q2 2026 13F, Boston Partners' MGNI position is worth $95.9M.

Question 4

Is Boston Partners buying or selling MGNI?

Accepted Answer

In Q2 2026, Boston Partners increased its MGNI position by 293,972 shares (+6.2%).

Question 5

When did Boston Partners first buy MGNI?

Accepted Answer

Boston Partners first reported MGNI in its Q2 2024 13F and has listed it in 9 quarterly 13F filings.

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q2 Latest	Increased	5M	+6.2%	$95.9M	0.1%	$18.98	32
2026-Q1	Increased	4.7M	+14.9%	$56.1M	0.1%	$11.88	34
2025-Q4	Decreased	4.1M	-7.6%	$66.6M	0.1%	$16.23	0
2025-Q3	Decreased	4.4M	-20.2%	$95.2M	0.1%	$21.78	0
2025-Q2	Increased	5.6M	+5.7%	$133M	0.1%	$24.12	38
2025-Q1	Increased	5.3M	+10.9%	$60.2M	0.1%	$11.41	33
2024-Q4	Increased	4.8M	+39.1%	$76.1M	0.1%	$15.92	39
2024-Q3	Increased	3.4M	+62.2%	$46.4M	0.1%	$13.85	42
2024-Q2	New	2.1M	-	$28.3M	0.0%	$13.29	40

MGNI9 quarters

MGNI
9 quarters