Covestor
BIIB icon

Covestor’s Biogen BIIB Stock Holding History

Covestor’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
Q3 		$24K Sell
105
-187
-64% -$39.7K 0.02% 1041
2026
Q2 		$63K Sell
292
-1
-0.3% -$191 0.04% 655
2026
Q1 		$54K Sell
293
-289
-50% -$53.3K 0.04% 657
2025
Q4 		$103K Sell
582
-443
-43% -$72.4K 0.05% 560
2025
Q3 		$144K Buy
1,025
+166
+19% +$22.4K 0.08% 357
2025
Q2 		$108K Buy
859
+217
+34% +$27K 0.06% 509
2025
Q1 		$88K Buy
642
+317
+98% +$45.3K 0.06% 561
2024
Q4 		$50K Buy
325
+240
+282% +$40.5K 0.03% 855
2024
Q3 		$17K Sell
85
-79
-48% -$16.5K 0.01% 1261
2024
Q2 		$38K Buy
164
+78
+91% +$17K 0.02% 966
2024
Q1 		$18K Sell
86
-1
-1% -$234 0.01% 1242
2023
Q4 		$23K Sell
87
-6
-6% -$1.47K 0.02% 1141
2023
Q3 		$24K Buy
93
+3
+3% +$802 0.02% 1043
2023
Q2 		$26K Sell
90
-95
-51% -$28.3K 0.02% 1023
2023
Q1 		$52K Buy
185
+81
+78% +$22.4K 0.05% 696
2022
Q4 		$29K Sell
104
-291
-74% -$82.2K 0.02% 923
2022
Q3 		$105K Sell
395
-35
-8% -$7.43K 0.09% 324
2022
Q2 		$88K Buy
430
+60
+16% +$12.3K 0.07% 485
2022
Q1 		$78K Buy
370
+186
+101% +$40.4K 0.05% 648
2021
Q4 		$44K Buy
+184
New +$47.3K 0.06% 609

Other funds holding BIIB

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.32T AUM 44.66% 1-Year Est. Return
BlackRock
BlackRock New York $6.79T AUM 37.06% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $161B AUM 86.05% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.76T AUM
State Street
State Street Boston, Massachusetts $3.44T AUM 36.12% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.21T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.92T AUM 36.1% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.96T AUM 27.49% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.84T AUM 33.86% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.27T AUM 50.62% 1-Year Est. Return

Covestor's BIIB Position: Q3 2026 in Review

Covestor reduced its Biogen (BIIB) stake by 64% in Q3 2026, selling an estimated $39.7K and leaving 105 shares worth $24K. The position accounts for 0.02% of the portfolio, ranked #1041.

Covestor first reported a position in BIIB in Q4 2021 and has held it in 20 quarters since. The position peaked at $144K in Q3 2025. 881 funds tracked by Wall St. Rank hold BIIB as of Q3 2026.

  • Covestor held 105 shares of Biogen worth $24K as of Q3 2026.
  • Covestor sold 187 Biogen shares in Q3 2026, an estimated $39.7K.
  • Biogen made up 0.02% of Covestor's portfolio in Q3 2026, its #1041 holding.
  • Covestor first reported a position in Biogen in Q4 2021 and has held it in 20 quarters since.
  • Covestor's Biogen position peaked at $144K in Q3 2025.
  • 881 funds tracked by Wall St. Rank held Biogen as of Q3 2026.

Based on Covestor's 13F filing for Q3 2026, filed 30 Oct 2026.