MGO One Seven’s Biogen BIIB Stock Holding History

MGO One Seven’s Portfolio BIIB Stock Details BIIB Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$291K	Buy	1,347 +38	+3%	+$7.27K	﹤0.01%	1266
2026 Q1	$240K	Sell	1,309 -942	-42%	-$174K	﹤0.01%	1251
2025 Q4	$396K	Buy	+2,251	New	+$368K	0.01%	986
2025 Q2	–	Sell	-1,547	Closed	-$212K	–	1200
2025 Q1	$212K	Buy	+1,547	New	+$221K	0.01%	1003
2024 Q4	–	Sell	-1,274	Closed	-$247K	–	1070
2024 Q3	$247K	Buy	+1,274	New	+$267K	0.01%	858
2024 Q1	–	Sell	-1,310	Closed	-$339K	–	911
2023 Q4	$339K	Buy	1,310 +193	+17%	+$47.4K	0.02%	667
2023 Q3	$287K	Sell	1,117 -234	-17%	-$62.6K	0.02%	634
2023 Q2	$385K	Sell	1,351 -51	-4%	-$15.2K	0.04%	506
2023 Q1	$390K	Buy	1,402 +312	+29%	+$86.3K	0.02%	560
2022 Q4	$302K	Buy	1,090 +2	+0.2%	+$565	0.03%	548
2022 Q3	$528K	Buy	+1,088	New	+$231K	0.02%	377
2020 Q4	–	Sell	-832	Closed	-$236K	–	497
2020 Q3	$236K	Buy	+832	New	+$232K	0.06%	387
2019 Q1	–	Sell	-603	Closed	-$181K	–	536
2018 Q4	$181K	Sell	603 -68	-10%	-$21.7K	0.08%	290
2018 Q3	$237K	Buy	+671	New	+$231K	0.11%	264
2018 Q1	$129K	Sell	471 -38	-7%	-$11.8K	0.06%	368
2017 Q4	$162K	Buy	+509	New	+$163K	0.07%	311

Other funds holding BIIB

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

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

Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

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

Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return

Norges Bank Oslo, Norway $1T AUM

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

MGO One Seven's BIIB Position: Q2 2026 in Review

MGO One Seven increased its Biogen (BIIB) stake by 2.9% in Q2 2026, buying an estimated $7.27K and bringing the position to 1,347 shares worth $291K. The position accounts for ﹤0.01% of the portfolio, ranked #1266.

MGO One Seven first reported a position in BIIB in Q4 2017 and has held it in 16 quarters since. The position peaked at $528K in Q3 2022. 1,043 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

MGO One Seven held 1,347 shares of Biogen worth $291K as of Q2 2026.
MGO One Seven bought 38 Biogen shares in Q2 2026, an estimated $7.27K.
Biogen made up ﹤0.01% of MGO One Seven's portfolio in Q2 2026, its #1266 holding.
MGO One Seven first reported a position in Biogen in Q4 2017 and has held it in 16 quarters since.
MGO One Seven's Biogen position peaked at $528K in Q3 2022.
1,043 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on MGO One Seven's 13F filing for Q2 2026, filed 31 Jul 2026.