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Horizon Kinetics Asset Management’s Biogen BIIB Stock Holding History

Horizon Kinetics Asset Management’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 		$589K Sell
2,726
-131
-5% -$25.1K 0.01% 205
2026
Q1 		$524K Sell
2,857
-131
-4% -$24.1K 0.01% 220
2025
Q4 		$526K Sell
2,988
-131
-4% -$21.4K 0.01% 219
2025
Q3 		$437K Buy
3,119
+81
+3% +$10.9K 0.01% 245
2025
Q2 		$382K Sell
3,038
-131
-4% -$16.3K ﹤0.01% 268
2025
Q1 		$434K Hold
3,169
– – ﹤0.01% 247
2024
Q4 		$485K Buy
3,169
+129
+4% +$21.8K 0.01% 235
2024
Q3 		$589K Sell
3,040
-81
-3% -$16.9K 0.01% 219
2024
Q2 		$724K Hold
3,121
– – 0.01% 191
2024
Q1 		$673K Buy
3,121
+2
+0.1% +$468 0.01% 195
2023
Q4 		$807K Sell
3,119
-131
-4% -$32.2K 0.02% 173
2023
Q3 		$835K Hold
3,250
– – 0.02% 172
2023
Q2 		$926K Hold
3,250
– – 0.02% 165
2023
Q1 		$904K Sell
3,250
-500
-13% -$138K 0.02% 166
2022
Q4 		$1.04M Hold
3,750
– – 0.02% 150
2022
Q3 		$1M Hold
3,750
– – 0.02% 144
2022
Q2 		$765K Hold
3,750
– – 0.02% 179
2022
Q1 		$790K Hold
3,750
– – 0.02% 196
2021
Q4 		$900K Sell
3,750
-125
-3% -$32.1K 0.02% 190
2021
Q3 		$1.1M Hold
3,875
– – 0.03% 170
2021
Q2 		$1.34M Sell
3,875
-50
-1% -$15.1K 0.03% 156
2021
Q1 		$1.1M Sell
3,925
-29
-0.7% -$7.82K 0.02% 171
2020
Q4 		$968K Sell
3,954
-45
-1% -$11.6K 0.03% 181
2020
Q3 		$1.13M Hold
3,999
– – 0.05% 150
2020
Q2 		$1.07M Sell
3,999
-125
-3% -$37.6K 0.04% 159
2020
Q1 		$1.3M Sell
4,124
-130
-3% -$39.5K 0.06% 114
2019
Q4 		$1.26M Sell
4,254
-275
-6% -$76.3K 0.04% 146
2019
Q3 		$1.05M Sell
4,529
-100
-2% -$23.3K 0.03% 161
2019
Q2 		$1.08M Buy
4,629
+125
+3% +$28.9K 0.03% 160
2019
Q1 		$1.06M Buy
+4,504
New +$1.42M 0.03% 167

Other funds holding BIIB

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
Norges Bank
Norges Bank Oslo, Norway $1T AUM
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

Horizon Kinetics Asset Management's BIIB Position: Q2 2026 in Review

Horizon Kinetics Asset Management reduced its Biogen (BIIB) stake by 4.6% in Q2 2026, selling an estimated $25.1K and leaving 2,726 shares worth $589K. The position accounts for 0.01% of the portfolio, ranked #205.

Horizon Kinetics Asset Management first reported a position in BIIB in Q1 2019 and has held it in 30 quarters since. The position peaked at $1.34M in Q2 2021. 1,038 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • Horizon Kinetics Asset Management held 2,726 shares of Biogen worth $589K as of Q2 2026.
  • Horizon Kinetics Asset Management sold 131 Biogen shares in Q2 2026, an estimated $25.1K.
  • Biogen made up 0.01% of Horizon Kinetics Asset Management's portfolio in Q2 2026, its #205 holding.
  • Horizon Kinetics Asset Management first reported a position in Biogen in Q1 2019 and has held it in 30 quarters since.
  • Horizon Kinetics Asset Management's Biogen position peaked at $1.34M in Q2 2021.
  • 1,038 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Horizon Kinetics Asset Management's 13F filing for Q2 2026, filed 11 Aug 2026.