Holocene Advisors’s Magnite MGNI Stock Holding History

Holocene Advisors’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	$1.21M	Buy	101,973 +86,411	+555%	+$1.16M	﹤0.01%	642
2025 Q4	$253K	Buy	+15,562	New	+$258K	﹤0.01%	713
2022 Q3	–	Sell	-121,143	Closed	-$1.08M	–	899
2022 Q2	$1.08M	Sell	121,143 -9,096	-7%	-$97.5K	0.01%	652
2022 Q1	$1.72M	Buy	130,239 +95,592	+276%	+$1.29M	0.01%	566
2021 Q4	$606K	Buy	+34,647	New	+$781K	﹤0.01%	754
2021 Q3	–	Sell	-178,997	Closed	-$6.06M	–	909
2021 Q2	$6.06M	Buy	+178,997	New	+$6.06M	0.03%	316

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

Holocene Advisors's MGNI Position: Q1 2026 in Review

Holocene Advisors increased its Magnite (MGNI) stake by 555% in Q1 2026, buying an estimated $1.16M and bringing the position to 101,973 shares worth $1.21M. The position accounts for ﹤0.01% of the portfolio, ranked #642.

Holocene Advisors first reported a position in MGNI in Q2 2021 and has held it in 6 quarters since. The position peaked at $6.06M in Q2 2021. 297 funds tracked by Wall St. Rank hold MGNI as of Q1 2026.

Holocene Advisors held 101,973 shares of Magnite worth $1.21M as of Q1 2026.
Holocene Advisors bought 86,411 Magnite shares in Q1 2026, an estimated $1.16M.
Magnite made up ﹤0.01% of Holocene Advisors's portfolio in Q1 2026, its #642 holding.
Holocene Advisors first reported a position in Magnite in Q2 2021 and has held it in 6 quarters since.
Holocene Advisors's Magnite position peaked at $6.06M in Q2 2021.
297 funds tracked by Wall St. Rank held Magnite as of Q1 2026.

Based on Holocene Advisors's 13F filing for Q1 2026, filed 15 May 2026.