Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2026
Q1
$220K Sell
1,200
-47,500
-98% -$8.75M ﹤0.01% 6586
2025
Q4
$8.57M Buy
48,700
+2,500
+5% +$408K ﹤0.01% 3449
2025
Q3
$6.47M Buy
46,200
+1,000
+2% +$135K ﹤0.01% 3773
2025
Q2
$5.68M Sell
45,200
-26,300
-37% -$3.28M ﹤0.01% 3744
2025
Q1
$9.78M Sell
71,500
-56,300
-44% -$8.05M ﹤0.01% 3063
2024
Q4
$19.5M Buy
127,800
+6,500
+5% +$1.1M ﹤0.01% 2343
2024
Q3
$23.5M Buy
121,300
+14,300
+13% +$2.99M 0.01% 1697
2024
Q2
$24.8M Sell
107,000
-44,600
-29% -$9.69M 0.01% 1508
2024
Q1
$32.7M Sell
151,600
-55,800
-27% -$13.1M 0.01% 1335
2023
Q4
$53.7M Buy
207,400
+16,600
+9% +$4.08M 0.02% 937
2023
Q3
$49M Buy
190,800
+112,900
+145% +$30.2M 0.02% 863
2023
Q2
$22.2M Buy
77,900
+6,500
+9% +$1.93M 0.01% 1376
2023
Q1
$19.9M Buy
71,400
+26,900
+60% +$7.44M 0.01% 1401
2022
Q4
$12.3M Buy
44,500
+17,230
+63% +$4.87M ﹤0.01% 1765
2022
Q3
$7.28M Buy
27,270
+70
+0.3% +$14.9K ﹤0.01% 2040
2022
Q2
$5.55M Hold
27,200
﹤0.01% 2288
2022
Q1
$5.73M Sell
27,200
-48,800
-64% -$10.6M ﹤0.01% 2408
2021
Q4
$18.2M Sell
76,000
-37,298
-33% -$9.59M 0.01% 1649
2021
Q3
$32.1M Sell
113,298
-10,500
-8% -$3.44M 0.01% 1129
2021
Q2
$42.9M Buy
123,798
+8,440
+7% +$2.56M 0.01% 950
2021
Q1
$32.3M Buy
115,358
+59,658
+107% +$16.1M 0.01% 1115
2020
Q4
$13.6M Buy
55,700
+22,700
+69% +$5.86M ﹤0.01% 1617
2020
Q3
$9.36M Sell
33,000
-3,000
-8% -$837K ﹤0.01% 1689
2020
Q2
$9.63M Sell
36,000
-76,500
-68% -$23M ﹤0.01% 1535
2020
Q1
$35.6M Sell
112,500
-32,000
-22% -$9.71M 0.02% 700
2019
Q4
$42.9M Buy
144,500
+144,275
+64,122% +$40M 0.01% 858
2019
Q3
$52K Sell
225
-17,375
-99% -$4.05M ﹤0.01% 6172
2019
Q2
$4.12M Sell
17,600
-24,600
-58% -$5.68M ﹤0.01% 2491
2019
Q1
$9.97M Sell
42,200
-118,800
-74% -$37.4M ﹤0.01% 1678
2018
Q4
$48.4M Buy
161,000
+159,500
+10,633% +$50.9M 0.02% 606
2018
Q3
$530K Sell
1,500
-1,800
-55% -$620K ﹤0.01% 4356
2018
Q2
$958K Sell
3,300
-11,700
-78% -$3.29M ﹤0.01% 3811
2018
Q1
$4.11M Buy
15,000
+5,000
+50% +$1.55M ﹤0.01% 2493
2017
Q4
$3.19M Sell
10,000
-11,800
-54% -$3.79M ﹤0.01% 2773
2017
Q3
$6.83M Buy
+21,800
New +$6.46M ﹤0.01% 1913
2017
Q2
Sell
-76,400
Closed -$20.9M 7669
2017
Q1
$20.9M Buy
76,400
+42,900
+128% +$12.1M 0.01% 1009
2016
Q4
$9.5M Sell
33,500
-1,900
-5% -$563K 0.01% 1542
2016
Q3
$11.1M Sell
35,400
-25,000
-41% -$7.4M 0.01% 1332
2016
Q2
$14.6M Buy
60,400
+59,200
+4,933% +$15.6M 0.01% 1130
2016
Q1
$312K Sell
1,200
-4,200
-78% -$1.11M ﹤0.01% 4159
2015
Q4
$1.65M Sell
5,400
-3,500
-39% -$1.01M ﹤0.01% 2981
2015
Q3
$2.6M Buy
8,900
+2,400
+37% +$793K ﹤0.01% 2508
2015
Q2
$2.63M Sell
6,500
-14,400
-69% -$5.78M ﹤0.01% 2713
2015
Q1
$8.82M Buy
20,900
+6,100
+41% +$2.4M 0.01% 1574
2014
Q4
$5.02M Buy
+14,800
New +$4.79M ﹤0.01% 2085

Other funds holding BIIB

UBS Group's BIIB Position: Q1 2026 in Review

UBS Group reduced its Biogen (BIIB) stake by 18% in Q1 2026, selling an estimated $21.8M and leaving 523,450 shares worth $96M. The position accounts for 0.01% of the portfolio, ranked #1083.

UBS Group first reported a position in BIIB in Q4 2014 and has held it in 46 quarters since. The position peaked at $160M in Q4 2024. 1,004 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

  • UBS Group held 523,450 shares of Biogen worth $96M as of Q1 2026.
  • UBS Group sold 118,338 Biogen shares in Q1 2026, an estimated $21.8M.
  • Biogen made up 0.01% of UBS Group's portfolio in Q1 2026, its #1083 holding.
  • UBS Group first reported a position in Biogen in Q4 2014 and has held it in 46 quarters since.
  • UBS Group's Biogen position peaked at $160M in Q4 2024.
  • 1,004 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

Based on UBS Group's 13F filing for Q1 2026, filed 5 May 2026.