Fidelity Investments’s Magnite MGNI Stock Holding History

Fidelity Investments’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	$147M	Buy	7,759,426 +3,252,007	+72%	+$46.6M	0.01%	1065
2026 Q1	$53.5M	Sell	4,507,419 -2,193,755	-33%	-$29.4M	﹤0.01%	1410
2025 Q4	$109M	Sell	6,701,174 -10,439,840	-61%	-$173M	0.01%	1142
2025 Q3	$373M	Sell	17,141,014 -44,925	-0.3%	-$1.06M	0.02%	609
2025 Q2	$415M	Buy	17,185,939 +7,501,741	+77%	+$111M	0.02%	561
2025 Q1	$110M	Buy	9,684,198 +8,069,421	+500%	+$129M	0.01%	1052
2024 Q4	$25.7M	Sell	1,614,777 -2,147,692	-57%	-$31.5M	﹤0.01%	1635
2024 Q3	$52.1M	Sell	3,762,469 -1,742,123	-32%	-$23.7M	﹤0.01%	1348
2024 Q2	$73.2M	Sell	5,504,592 -2,044,730	-27%	-$22.4M	﹤0.01%	1163
2024 Q1	$81.2M	Buy	7,549,322 +583,795	+8%	+$5.83M	0.01%	1145
2023 Q4	$65.1M	Buy	6,965,527 +2,565,215	+58%	+$20.3M	0.01%	1185
2023 Q3	$33.2M	Sell	4,400,312 -2,920,870	-40%	-$31.5M	﹤0.01%	1399
2023 Q2	$99.9M	Buy	7,321,182 +516,264	+8%	+$5.75M	0.01%	992
2023 Q1	$63M	Buy	6,804,918 +675,387	+11%	+$7.2M	0.01%	1167
2022 Q4	$64.9M	Buy	6,129,531 +391,142	+7%	+$3.57M	0.01%	1142
2022 Q3	$37.7M	Buy	5,738,389 +2,874	+0.1%	+$23.1K	﹤0.01%	1356
2022 Q2	$50.9M	Sell	5,735,515 -4,241,938	-43%	-$45.5M	0.01%	1252
2022 Q1	$132M	Buy	9,977,453 +247,451	+3%	+$3.34M	0.01%	957
2021 Q4	$170M	Buy	9,730,002 +805,640	+9%	+$18.2M	0.01%	868
2021 Q3	$250M	Buy	8,924,362 +2,381,018	+36%	+$71.7M	0.02%	712
2021 Q2	$221M	Buy	6,543,344 +2,690,504	+70%	+$91.2M	0.02%	778
2021 Q1	$160M	Buy	3,852,840 +3,719,308	+2,785%	+$161M	0.01%	885
2020 Q4	$4.1M	Buy	+133,532	New	+$2.02M	﹤0.01%	2226
2020 Q2	–	Sell	-435	Closed	-$2K	–	3947
2020 Q1	$2K	Sell	435 -101	-19%	-$928	﹤0.01%	3411
2019 Q4	$4K	Sell	536 -164	-23%	-$1.35K	﹤0.01%	3457
2019 Q3	$6K	Buy	+700	New	+$6.14K	﹤0.01%	3363
2014 Q4	–	Sell	-200,000	Closed	-$2.35M	–	2816
2014 Q3	$2.35M	Sell	200,000 -1,515,856	-88%	-$16.6M	﹤0.01%	2391
2014 Q2	$22M	Buy	+1,715,856	New	+$25.8M	﹤0.01%	1752

Other funds holding MGNI

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

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

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

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Fidelity Investments's MGNI Position: Q2 2026 in Review

Fidelity Investments increased its Magnite (MGNI) stake by 72% in Q2 2026, buying an estimated $46.6M and bringing the position to 7,759,426 shares worth $147M. The position accounts for 0.01% of the portfolio, ranked #1065.

Fidelity Investments first reported a position in MGNI in Q2 2014 and has held it in 28 quarters since. The position peaked at $415M in Q2 2025. 310 funds tracked by Wall St. Rank hold MGNI as of Q2 2026.

Fidelity Investments held 7,759,426 shares of Magnite worth $147M as of Q2 2026.
Fidelity Investments bought 3,252,007 Magnite shares in Q2 2026, an estimated $46.6M.
Magnite made up 0.01% of Fidelity Investments's portfolio in Q2 2026, its #1065 holding.
Fidelity Investments first reported a position in Magnite in Q2 2014 and has held it in 28 quarters since.
Fidelity Investments's Magnite position peaked at $415M in Q2 2025.
310 funds tracked by Wall St. Rank held Magnite as of Q2 2026.

Based on Fidelity Investments's 13F filing for Q2 2026, filed 13 Aug 2026.