Caption Management’s Magnite MGNI Stock Holding History

Caption 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	$2.76M	Sell	145,590 -259,463	-64%	-$3.72M	0.01%	793
2026 Q1	$4.81M	Buy	405,053 +388,853	+2,400%	+$5.21M	0.03%	544
2025 Q4	$263K	Buy	+16,200	New	+$269K	﹤0.01%	1342
2024 Q4	–	Sell	-36,677	Closed	-$538K	–	1685
2024 Q3	$508K	Buy	+36,677	New	+$500K	0.01%	924
2024 Q1	–	Sell	-11,648	Closed	-$116K	–	1500
2023 Q4	$109K	Buy	+11,648	New	+$92K	﹤0.01%	1171
2022 Q1	–	Sell	-26,500	Closed	-$357K	–	1751
2021 Q4	$465K	Buy	+26,500	New	+$597K	0.01%	1265
2021 Q3	–	Sell	-4,800	Closed	-$162K	–	1676
2021 Q2	$162K	Buy	+4,800	New	+$163K	﹤0.01%	1195
2020 Q4	–	Sell	-39,005	Closed	-$590K	–	1154
2020 Q3	$270K	Buy	+39,005	New	+$261K	0.01%	871
2020 Q1	–	Sell	-19,238	Closed	-$177K	–	985
2019 Q4	$157K	Buy	+19,238	New	+$158K	0.01%	736
2019 Q1	–	Sell	-1,358,203	Closed	-$5.07M	–	673
2018 Q4	$5.07M	Buy	1,358,203 +64,582	+5%	+$247K	0.4%	78
2018 Q3	$4.66M	Hold	1,293,621	–	–	0.26%	108
2018 Q2	$3.69M	Sell	1,293,621 -107,000	-8%	-$255K	0.29%	105
2018 Q1	$2.52M	Buy	1,400,621 +742,721	+113%	+$1.41M	0.36%	85
2017 Q4	$1.23M	Buy	+657,900	New	+$1.64M	0.13%	163

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

Caption Management's MGNI Position: Q2 2026 in Review

Caption Management reduced its Magnite (MGNI) stake by 64% in Q2 2026, selling an estimated $3.72M and leaving 145,590 shares worth $2.76M. The position accounts for 0.01% of the portfolio, ranked #793.

Caption Management first reported a position in MGNI in Q4 2017 and has held it in 14 quarters since. The position peaked at $5.07M in Q4 2018. 310 funds tracked by Wall St. Rank hold MGNI as of Q2 2026.

Caption Management held 145,590 shares of Magnite worth $2.76M as of Q2 2026.
Caption Management sold 259,463 Magnite shares in Q2 2026, an estimated $3.72M.
Magnite made up 0.01% of Caption Management's portfolio in Q2 2026, its #793 holding.
Caption Management first reported a position in Magnite in Q4 2017 and has held it in 14 quarters since.
Caption Management's Magnite position peaked at $5.07M in Q4 2018.
310 funds tracked by Wall St. Rank held Magnite as of Q2 2026.

Based on Caption Management's 13F filing for Q2 2026, filed 14 Aug 2026.