Fox Run Management’s Magnite MGNI Stock Holding History

Fox Run Management’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 Q2	$506K	Sell	26,666 -61,437	-70%	-$880K	0.08%	468
2026 Q1	$1.02M	Buy	+88,103	New	+$1.18M	0.18%	169
2025 Q4	–	Sell	-63,761	Closed	-$1.39M	–	1117
2025 Q3	$1.39M	Buy	+63,761	New	+$1.51M	0.22%	106
2025 Q2	–	Sell	-77,223	Closed	-$881K	–	1077
2025 Q1	$881K	Buy	+77,223	New	+$1.23M	0.14%	244
2024 Q4	–	Sell	-24,029	Closed	-$333K	–	1054
2024 Q3	$333K	Buy	+24,029	New	+$327K	0.07%	503
2024 Q2	–	Sell	-32,160	Closed	-$346K	–	950
2024 Q1	$346K	Buy	+32,160	New	+$321K	0.07%	487
2023 Q2	–	Sell	-19,914	Closed	-$184K	–	858
2023 Q1	$184K	Buy	19,914 +9,844	+98%	+$105K	0.06%	546
2022 Q4	$107K	Sell	10,070 -13,328	-57%	-$122K	0.04%	559
2022 Q3	$154K	Sell	23,398 -1,030	-4%	-$8.29K	0.06%	516
2022 Q2	$217K	Buy	+24,428	New	+$262K	0.11%	399
2019 Q3	–	Sell	-10,010	Closed	-$64K	–	488
2019 Q2	$64K	Buy	+10,010	New	+$61.5K	0.04%	406
2016 Q4	–	Sell	-10,400	Closed	-$86K	–	604
2016 Q3	$86K	Sell	10,400 -13,100	-56%	-$139K	0.05%	453
2016 Q2	$321K	Buy	+23,500	New	+$378K	0.16%	262

Other funds holding MGNI

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return

American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return

Capital Research Global Investors Los Angeles, California $717B AUM 35.42% 1-Year Est. Return

Nuveen Charlotte, North Carolina $419B AUM 43.02% 1-Year Est. Return

Fox Run Management's MGNI Position: Q2 2026 in Review

Fox Run Management reduced its Magnite (MGNI) stake by 70% in Q2 2026, selling an estimated $880K and leaving 26,666 shares worth $506K. The position accounts for 0.08% of the portfolio, ranked #468.

Fox Run Management first reported a position in MGNI in Q2 2016 and has held it in 13 quarters since. The position peaked at $1.39M in Q3 2025. 310 funds tracked by Wall St. Rank hold MGNI as of Q2 2026.

Fox Run Management held 26,666 shares of Magnite worth $506K as of Q2 2026.
Fox Run Management sold 61,437 Magnite shares in Q2 2026, an estimated $880K.
Magnite made up 0.08% of Fox Run Management's portfolio in Q2 2026, its #468 holding.
Fox Run Management first reported a position in Magnite in Q2 2016 and has held it in 13 quarters since.
Fox Run Management's Magnite position peaked at $1.39M in Q3 2025.
310 funds tracked by Wall St. Rank held Magnite as of Q2 2026.

Based on Fox Run Management's 13F filing for Q2 2026, filed 4 Aug 2026.