Edenbrook Capital’s Magnite MGNI Stock Holding History

Edenbrook Capital’s Portfolio MGNI Stock Details MGNI Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$7.13M	Sell	600,000 -900,000	-60%	-$12.1M	2.22%	10
2025 Q4	$24.3M	Buy	+1,500,000	New	+$24.9M	4.54%	8
2025 Q2	–	Sell	-450,000	Closed	-$5.13M	–	25
2025 Q1	$5.13M	Sell	450,000 -50,000	-10%	-$797K	1.5%	16
2024 Q4	$7.96M	Buy	+500,000	New	+$7.34M	2.25%	10
2024 Q3	–	Sell	-150,000	Closed	-$1.99M	–	16
2024 Q2	$1.99M	Buy	+150,000	New	+$1.64M	0.75%	15
2022 Q1	–	Sell	-2,000	Closed	-$3.5M	–	24
2021 Q4	$3.5M	Buy	+2,000	New	+$45.1K	0.5%	22
2020 Q2	–	Sell	-181,674	Closed	-$1.01M	–	17
2020 Q1	$1.01M	Buy	+181,674	New	+$1.67M	0.76%	15

Other funds holding MGNI

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Capital Research Global Investors Los Angeles, California $645B AUM 30.41% 1-Year Est. Return

Boston Partners Boston, Massachusetts $95.5B AUM 28.4% 1-Year Est. Return

American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

Nuveen Charlotte, North Carolina $369B AUM 31.66% 1-Year Est. Return

Edenbrook Capital's MGNI Position: Q1 2026 in Review

Edenbrook Capital increased its Magnite (MGNI) stake by 0.36% in Q1 2026, buying an estimated $134K and bringing the position to 2,798,036 shares worth $33.2M. The position accounts for 10.35% of the portfolio, ranked #3.

Edenbrook Capital first reported a position in MGNI in Q2 2020 and has held it in 24 quarters since. The position peaked at $87.1M in Q2 2025. 296 funds tracked by Wall St. Rank hold MGNI as of Q1 2026.

Edenbrook Capital held 2,798,036 shares of Magnite worth $33.2M as of Q1 2026.
Edenbrook Capital bought 10,000 Magnite shares in Q1 2026, an estimated $134K.
Magnite made up 10.35% of Edenbrook Capital's portfolio in Q1 2026, its #3 holding.
Edenbrook Capital first reported a position in Magnite in Q2 2020 and has held it in 24 quarters since.
Edenbrook Capital's Magnite position peaked at $87.1M in Q2 2025.
296 funds tracked by Wall St. Rank held Magnite as of Q1 2026.

Based on Edenbrook Capital's 13F filing for Q1 2026, filed 14 May 2026.