Kovitz Investment Group Partners
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Kovitz Investment Group Partners’s Biogen BIIB Stock Holding History

Kovitz Investment Group Partners’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 		$4.42M Sell
20,457
-483
-2% -$92.4K 0.1% 142
2026
Q1 		$3.84M Sell
20,940
-193
-0.9% -$35.6K 0.09% 155
2025
Q4 		$3.72M Sell
21,133
-1,816
-8% -$297K 0.08% 165
2025
Q3 		$3.21M Buy
22,949
+4,628
+25% +$626K 0.01% 544
2025
Q2 		$2.3M Buy
18,321
+4,105
+29% +$511K 0.01% 602
2025
Q1 		$1.95M Buy
14,216
+10,318
+265% +$1.48M 0.01% 587
2024
Q4 		$596K Sell
3,898
-1,372
-26% -$231K ﹤0.01% 847
2024
Q3 		$800K Buy
5,270
+1,638
+45% +$343K 0.01% 676
2024
Q2 		$842K Buy
3,632
+1,805
+99% +$392K 0.01% 572
2024
Q1 		$394K Buy
+1,827
New +$428K 0.01% 545
2022
Q1 		– Sell
-15,868
Closed -$3.88M – 424
2021
Q4 		$3.88M Buy
15,868
+276
+2% +$71K 0.09% 149
2021
Q3 		$4.41M Sell
15,592
-27
-0.2% -$8.85K 0.09% 162
2021
Q2 		$5.41M Sell
15,619
-438
-3% -$133K 0.11% 143
2021
Q1 		$4.49M Buy
16,057
+189
+1% +$51K 0.1% 143
2020
Q4 		$3.88M Sell
15,868
-1,103
-6% -$285K 0.09% 145
2020
Q3 		$4.81M Sell
16,971
-204
-1% -$56.9K 0.13% 114
2020
Q2 		$4.59M Sell
17,175
-583
-3% -$175K 0.14% 108
2020
Q1 		$5.62M Sell
17,758
-666
-4% -$202K 0.2% 82
2019
Q4 		$5.47M Buy
18,424
+185
+1% +$51.3K 0.16% 97
2019
Q3 		$4.25M Sell
18,239
-493
-3% -$115K 0.14% 124
2019
Q2 		$4.38M Buy
18,732
+76
+0.4% +$17.5K 0.14% 113
2019
Q1 		$4.41M Buy
18,656
+167
+0.9% +$52.6K 0.14% 110
2018
Q4 		$5.56M Buy
+18,489
New +$5.9M 0.22% 72

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Fidelity Investments
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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 $3.38T AUM 44.17% 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

Kovitz Investment Group Partners's BIIB Position: Q2 2026 in Review

Kovitz Investment Group Partners reduced its Biogen (BIIB) stake by 2.3% in Q2 2026, selling an estimated $92.4K and leaving 20,457 shares worth $4.42M. The position accounts for 0.1% of the portfolio, ranked #142.

Kovitz Investment Group Partners first reported a position in BIIB in Q4 2018 and has held it in 23 quarters since. The position peaked at $5.62M in Q1 2020. 1,046 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • Kovitz Investment Group Partners held 20,457 shares of Biogen worth $4.42M as of Q2 2026.
  • Kovitz Investment Group Partners sold 483 Biogen shares in Q2 2026, an estimated $92.4K.
  • Biogen made up 0.1% of Kovitz Investment Group Partners's portfolio in Q2 2026, its #142 holding.
  • Kovitz Investment Group Partners first reported a position in Biogen in Q4 2018 and has held it in 23 quarters since.
  • Kovitz Investment Group Partners's Biogen position peaked at $5.62M in Q1 2020.
  • 1,046 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Kovitz Investment Group Partners's 13F filing for Q2 2026, filed 12 Aug 2026.