Two Sigma Securities’s Magnite MGNI Stock Holding History

Two Sigma Securities’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	$400K	Buy	21,097 +9,066	+75%	+$130K	0.03%	698
2026 Q1	$143K	Buy	+12,031	New	+$161K	0.02%	1114
2025 Q3	–	Sell	-12,070	Closed	-$291K	–	1779
2025 Q2	$291K	Sell	12,070 -12,585	-51%	-$185K	0.04%	673
2025 Q1	$281K	Buy	+24,655	New	+$393K	0.04%	629
2023 Q1	–	Sell	-46,081	Closed	-$488K	–	3036
2022 Q4	$488K	Buy	+46,081	New	+$421K	0.01%	1100
2022 Q3	–	Sell	-15,794	Closed	-$140K	–	2901
2022 Q2	$140K	Buy	+15,794	New	+$169K	0.01%	1703
2021 Q4	–	Sell	-16,815	Closed	-$471K	–	1856
2021 Q3	$471K	Buy	+16,815	New	+$506K	0.01%	793
2017 Q2	–	Sell	-10,210	Closed	-$60K	–	1048
2017 Q1	$60K	Buy	+10,210	New	+$79.5K	0.01%	790

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

Two Sigma Securities's MGNI Position: Q2 2026 in Review

Two Sigma Securities increased its Magnite (MGNI) stake by 75% in Q2 2026, buying an estimated $130K and bringing the position to 21,097 shares worth $400K. The position accounts for 0.03% of the portfolio, ranked #698.

Two Sigma Securities first reported a position in MGNI in Q1 2017 and has held it in 8 quarters since. The position peaked at $488K in Q4 2022. 311 funds tracked by Wall St. Rank hold MGNI as of Q2 2026.

Two Sigma Securities held 21,097 shares of Magnite worth $400K as of Q2 2026.
Two Sigma Securities bought 9,066 Magnite shares in Q2 2026, an estimated $130K.
Magnite made up 0.03% of Two Sigma Securities's portfolio in Q2 2026, its #698 holding.
Two Sigma Securities first reported a position in Magnite in Q1 2017 and has held it in 8 quarters since.
Two Sigma Securities's Magnite position peaked at $488K in Q4 2022.
311 funds tracked by Wall St. Rank held Magnite as of Q2 2026.

Based on Two Sigma Securities's 13F filing for Q2 2026, filed 14 Aug 2026.