Impax Asset Management Group
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Impax Asset Management Group’s Biogen BIIB Stock Holding History

Impax Asset Management Group’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 		– Sell
-28,728
Closed -$5.27M – 285
2026
Q1 		$5.27M Sell
28,728
-3,396
-11% -$626K 0.04% 211
2025
Q4 		$5.65M Sell
32,124
-932
-3% -$152K 0.04% 200
2025
Q3 		$4.63M Sell
33,056
-470
-1% -$63.5K 0.03% 202
2025
Q2 		$4.21M Sell
33,526
-2,320
-6% -$289K 0.02% 215
2025
Q1 		$4.91M Sell
35,846
-884
-2% -$126K 0.03% 198
2024
Q4 		$5.62M Sell
36,730
-2,080
-5% -$351K 0.03% 212
2024
Q3 		$7.52M Buy
38,810
+11,185
+40% +$2.34M 0.03% 194
2024
Q2 		$6.4M Buy
+27,625
New +$6M 0.03% 204
2024
Q1 		– Sell
-3,088
Closed -$799K – 312
2023
Q4 		$799K Sell
3,088
-4
-0.1% -$982 ﹤0.01% 302
2023
Q3 		$795K Sell
3,092
-496
-14% -$133K ﹤0.01% 288
2023
Q2 		$1.02M Sell
3,588
-63
-2% -$18.8K ﹤0.01% 280
2023
Q1 		$1.02M Sell
3,651
-173
-5% -$47.9K ﹤0.01% 277
2022
Q4 		$1.06M Buy
+3,824
New +$1.08M ﹤0.01% 262
2020
Q3 		– Sell
-29,618
Closed -$7.92M – 277
2020
Q2 		$7.92M Buy
29,618
+7,000
+31% +$2.1M 0.08% 129
2020
Q1 		$7.16M Sell
22,618
-5,900
-21% -$1.79M 0.1% 123
2019
Q4 		$8.46M Sell
28,518
-3,905
-12% -$1.08M 0.09% 129
2019
Q3 		$7.55M Buy
32,423
+306
+1% +$71.3K 0.1% 136
2019
Q2 		$7.51M Sell
32,117
-13,167
-29% -$3.04M 0.1% 132
2019
Q1 		$10.7M Sell
45,284
-606
-1% -$191K 0.15% 109
2018
Q4 		$13.8M Buy
45,890
+30
+0.1% +$9.57K 0.23% 86
2018
Q3 		$16.2M Buy
+45,860
New +$15.8M 0.23% 95

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

Impax Asset Management Group's BIIB Position: Q2 2026 in Review

Impax Asset Management Group sold out of Biogen (BIIB) in Q2 2026, closing a stake of 28,728 shares — an estimated $5.27M sold.

Impax Asset Management Group first reported a position in BIIB in Q3 2018 and held it in 21 quarters. The position peaked at $16.2M in Q3 2018. 1,036 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • Impax Asset Management Group reported no remaining Biogen position as of Q2 2026 after selling out during the quarter.
  • Impax Asset Management Group sold 28,728 Biogen shares in Q2 2026, an estimated $5.27M.
  • Impax Asset Management Group first reported a position in Biogen in Q3 2018 and held it in 21 quarters.
  • Impax Asset Management Group's Biogen position peaked at $16.2M in Q3 2018.
  • 1,036 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

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