Amundi
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Amundi’s Biogen BIIB Stock Holding History

Amundi’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 		$328M Buy
1,516,831
+726,004
+92% +$139M 0.08% 219
2026
Q1 		$145M Buy
790,827
+218,398
+38% +$40.2M 0.04% 363
2025
Q4 		$101M Sell
572,429
-45,880
-7% -$7.5M 0.03% 489
2025
Q3 		$95.3M Buy
618,309
+38,512
+7% +$5.21M 0.03% 416
2025
Q2 		$77.2M Sell
579,797
-736,150
-56% -$91.7M 0.03% 473
2025
Q1 		$172M Buy
1,315,947
+98,957
+8% +$14.1M 0.06% 286
2024
Q4 		$183M Buy
1,216,990
+319,478
+36% +$53.9M 0.06% 285
2024
Q3 		$164M Buy
897,512
+212,692
+31% +$44.5M 0.06% 292
2024
Q2 		$154M Sell
684,820
-300,982
-31% -$65.4M 0.06% 281
2024
Q1 		$188M Sell
985,802
-215,904
-18% -$50.6M 0.08% 252
2023
Q4 		$307M Buy
1,201,706
+108,182
+10% +$26.6M 0.14% 170
2023
Q3 		$287M Sell
1,093,524
-93,789
-8% -$25.1M 0.14% 165
2023
Q2 		$339M Buy
1,187,313
+609,020
+105% +$181M 0.17% 140
2023
Q1 		$164M Sell
578,293
-240,340
-29% -$66.5M 0.09% 246
2022
Q4 		$233M Buy
818,633
+169,737
+26% +$47.9M 0.13% 184
2022
Q3 		$170M Buy
648,896
+241,061
+59% +$51.2M 0.1% 221
2022
Q2 		$87.4M Buy
407,835
+60,579
+17% +$12.4M 0.07% 286
2022
Q1 		$73.5M Sell
347,256
-456,338
-57% -$99.2M 0.05% 372
2021
Q4 		$190M Sell
803,594
-51,409
-6% -$13.2M 0.12% 198
2021
Q3 		$242M Buy
855,003
+235,305
+38% +$77.1M 0.17% 149
2021
Q2 		$215M Buy
+619,698
New +$188M 0.15% 164

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

Amundi's BIIB Position: Q2 2026 in Review

Amundi increased its Biogen (BIIB) stake by 92% in Q2 2026, buying an estimated $139M and bringing the position to 1,516,831 shares worth $328M. The position accounts for 0.08% of the portfolio, ranked #219.

Amundi first reported a position in BIIB in Q2 2021 and has held it in 21 quarters since. The position peaked at $339M in Q2 2023. 1,042 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • Amundi held 1,516,831 shares of Biogen worth $328M as of Q2 2026.
  • Amundi bought 726,004 Biogen shares in Q2 2026, an estimated $139M.
  • Biogen made up 0.08% of Amundi's portfolio in Q2 2026, its #219 holding.
  • Amundi first reported a position in Biogen in Q2 2021 and has held it in 21 quarters since.
  • Amundi's Biogen position peaked at $339M in Q2 2023.
  • 1,042 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Amundi's 13F filing for Q2 2026, filed 11 Aug 2026.