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 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 $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

Two Sigma Securities's MGNI Position: Q1 2026 in Review

Two Sigma Securities opened a new position in Magnite (MGNI) in Q1 2026: 12,031 shares worth $143K. The stake represents 0.02% of the portfolio and ranks #1114 among its holdings. This is a return to the name: Two Sigma Securities previously reported a position in MGNI as recently as Q2 2025.

Two Sigma Securities first reported a position in MGNI in Q1 2017 and has held it in 7 quarters since. The position peaked at $488K in Q4 2022. 296 funds tracked by Wall St. Rank hold MGNI as of Q1 2026.

Two Sigma Securities held 12,031 shares of Magnite worth $143K as of Q1 2026.
Magnite was a new Two Sigma Securities position in Q1 2026.
Magnite made up 0.02% of Two Sigma Securities's portfolio in Q1 2026, its #1114 holding.
Two Sigma Securities first reported a position in Magnite in Q1 2017 and has held it in 7 quarters since.
Two Sigma Securities's Magnite position peaked at $488K in Q4 2022.
296 funds tracked by Wall St. Rank held Magnite as of Q1 2026.

Based on Two Sigma Securities's 13F filing for Q1 2026, filed 15 May 2026.