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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
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 		$528 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

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

MGO One Seven's BIIB Position: Q1 2026 in Review

MGO One Seven reduced its Biogen (BIIB) stake by 42% in Q1 2026, selling an estimated $174K and leaving 1,309 shares worth $240K. The position accounts for ﹤0.01% of the portfolio, ranked #1251.

MGO One Seven first reported a position in BIIB in Q4 2017 and has held it in 15 quarters since. The position peaked at $396K in Q4 2025. 1,002 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

  • MGO One Seven held 1,309 shares of Biogen worth $240K as of Q1 2026.
  • MGO One Seven sold 942 Biogen shares in Q1 2026, an estimated $174K.
  • Biogen made up ﹤0.01% of MGO One Seven's portfolio in Q1 2026, its #1251 holding.
  • MGO One Seven first reported a position in Biogen in Q4 2017 and has held it in 15 quarters since.
  • MGO One Seven's Biogen position peaked at $396K in Q4 2025.
  • 1,002 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

Based on MGO One Seven's 13F filing for Q1 2026, filed 14 May 2026.