AllianceBernstein’s Magnite MGNI Stock Holding History

AllianceBernstein’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	$3.62M	Buy	223,191 +97,846	+78%	+$1.31M	﹤0.01%	1697
2025 Q4	$2.03M	Sell	125,345 -19,300	-13%	-$320K	﹤0.01%	1997
2025 Q3	$3.15M	Buy	144,645 +7,700	+6%	+$182K	﹤0.01%	1751
2025 Q2	$3.3M	Buy	136,945 +300	+0.2%	+$4.42K	﹤0.01%	1683
2025 Q1	$1.56M	Hold	136,645	–	–	﹤0.01%	2030
2024 Q4	$2.18M	Hold	136,645	–	–	﹤0.01%	1915
2024 Q3	$1.89M	Sell	136,645 -24	-0%	-$327	﹤0.01%	1990
2024 Q2	$1.82M	Sell	136,669 -2,842	-2%	-$31.1K	﹤0.01%	2013
2024 Q1	$1.5M	Buy	139,511 +12,360	+10%	+$123K	﹤0.01%	2064
2023 Q4	$1.19M	Hold	127,151	–	–	﹤0.01%	2191
2023 Q3	$959K	Sell	127,151 -3,100	-2%	-$33.4K	﹤0.01%	2266
2023 Q2	$1.78M	Hold	130,251	–	–	﹤0.01%	1965
2023 Q1	$1.21M	Hold	130,251	–	–	﹤0.01%	2133
2022 Q4	$1.38M	Hold	130,251	–	–	﹤0.01%	2118
2022 Q3	$856K	Sell	130,251 -26,884	-17%	-$216K	﹤0.01%	2378
2022 Q2	$1.4M	Buy	157,135 +29,484	+23%	+$316K	﹤0.01%	2165
2022 Q1	$1.69M	Buy	127,651 +400	+0.3%	+$5.39K	﹤0.01%	2189
2021 Q4	$2.23M	Sell	127,251 -2,100	-2%	-$47.3K	﹤0.01%	2069
2021 Q3	$3.62M	Sell	129,351 -14,600	-10%	-$439K	﹤0.01%	1783
2021 Q2	$4.87M	Sell	143,951 -4,090	-3%	-$139K	﹤0.01%	1630
2021 Q1	$6.16M	Buy	148,041 +19,510	+15%	+$845K	﹤0.01%	1443
2020 Q4	$3.95M	Buy	128,531 +8,180	+7%	+$124K	﹤0.01%	1631
2020 Q3	$836K	Sell	120,351 -921,117	-88%	-$6.15M	﹤0.01%	2265
2020 Q2	$6.95M	Buy	1,041,468 +983,071	+1,683%	+$6.14M	﹤0.01%	1162
2020 Q1	$324K	Buy	58,397 +37,097	+174%	+$341K	﹤0.01%	2586
2019 Q4	$174K	Sell	21,300 -18,800	-47%	-$155K	﹤0.01%	2951
2019 Q3	$349K	Buy	40,100 +21,500	+116%	+$188K	﹤0.01%	2734
2019 Q2	$118K	Buy	+18,600	New	+$114K	﹤0.01%	3057
2018 Q2	–	Sell	-29,900	Closed	-$54K	–	3130
2018 Q1	$54K	Hold	29,900	–	–	﹤0.01%	2989
2017 Q4	$56K	Sell	29,900 -4,900	-14%	-$12.2K	﹤0.01%	2994
2017 Q3	$135K	Sell	34,800 -5,100	-13%	-$21.7K	﹤0.01%	3013
2017 Q2	$205K	Sell	39,900 -37,600	-49%	-$207K	﹤0.01%	2984
2017 Q1	$456K	Buy	77,500 +46,000	+146%	+$358K	﹤0.01%	2572
2016 Q4	$234K	Hold	31,500	–	–	﹤0.01%	2835
2016 Q3	$261K	Sell	31,500 -5,700	-15%	-$60.6K	﹤0.01%	2746
2016 Q2	$508K	Buy	+37,200	New	+$599K	﹤0.01%	2520
2015 Q2	–	Sell	-9,300	Closed	-$167K	–	3170
2015 Q1	$167K	Buy	9,300 +4,900	+111%	+$82.6K	﹤0.01%	2887
2014 Q4	$71K	Hold	4,400	–	–	﹤0.01%	3050
2014 Q3	$52K	Sell	4,400 -2,200	-33%	-$24.1K	﹤0.01%	3077
2014 Q2	$85K	Buy	+6,600	New	+$99.1K	﹤0.01%	3030

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

AllianceBernstein's MGNI Position: Q1 2026 in Review

AllianceBernstein increased its Magnite (MGNI) stake by 78% in Q1 2026, buying an estimated $1.31M and bringing the position to 223,191 shares worth $3.62M. The position accounts for ﹤0.01% of the portfolio, ranked #1697.

AllianceBernstein first reported a position in MGNI in Q2 2014 and has held it in 40 quarters since. The position peaked at $6.95M in Q2 2020. 297 funds tracked by Wall St. Rank hold MGNI as of Q1 2026.

AllianceBernstein held 223,191 shares of Magnite worth $3.62M as of Q1 2026.
AllianceBernstein bought 97,846 Magnite shares in Q1 2026, an estimated $1.31M.
Magnite made up ﹤0.01% of AllianceBernstein's portfolio in Q1 2026, its #1697 holding.
AllianceBernstein first reported a position in Magnite in Q2 2014 and has held it in 40 quarters since.
AllianceBernstein's Magnite position peaked at $6.95M in Q2 2020.
297 funds tracked by Wall St. Rank held Magnite as of Q1 2026.

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