Sphera Funds Management’s Biogen BIIB Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | $17M | Sell |
92,526
-2,212
| -2% | -$408K | 2.69% | 8 |
|
|
2025
Q4 | $16.7M | Buy |
94,738
+12,000
| +15% | +$1.96M | 3.22% | 2 |
|
|
2025
Q3 | $11.6M | Hold |
82,738
| – | – | 2.44% | 7 |
|
|
2025
Q2 | $10.4M | Buy |
82,738
+60,000
| +264% | +$7.48M | 2.44% | 8 |
|
|
2025
Q1 | $3.11M | Hold |
22,738
| – | – | 0.72% | 47 |
|
|
2024
Q4 | $3.48M | Sell |
22,738
-1,717
| -7% | -$290K | 0.63% | 61 |
|
|
2024
Q3 | $4.74M | Sell |
24,455
-22,957
| -48% | -$4.8M | 0.75% | 46 |
|
|
2024
Q2 | $11M | Sell |
47,412
-23,234
| -33% | -$5.05M | 1.5% | 21 |
|
|
2024
Q1 | $15.2M | Buy |
70,646
+24,300
| +52% | +$5.69M | 2.14% | 9 |
|
|
2023
Q4 | $12M | Buy |
46,346
+20,500
| +79% | +$5.04M | 1.93% | 15 |
|
|
2023
Q3 | $6.64M | Buy |
25,846
+2,000
| +8% | +$535K | 1.21% | 26 |
|
|
2023
Q2 | $6.79M | Sell |
23,846
-9,670
| -29% | -$2.88M | 1.06% | 33 |
|
|
2023
Q1 | $9.32M | Buy |
33,516
+26,000
| +346% | +$7.19M | 1.56% | 18 |
|
|
2022
Q4 | $2.08M | Sell |
7,516
-47,984
| -86% | -$13.6M | 0.45% | 42 |
|
|
2022
Q3 | $14.8M | Buy |
+55,500
| New | +$11.8M | 2.06% | 12 |
|
|
2022
Q1 | – | Sell |
-13,000
| Closed | -$3.12M | – | 74 |
|
|
2021
Q4 | $3.12M | Buy |
+13,000
| New | +$3.34M | 0.34% | 67 |
|
|
2021
Q3 | – | Sell |
-23,995
| Closed | -$7.86M | – | 123 |
|
|
2021
Q2 | $8.31M | Buy |
23,995
+17,195
| +253% | +$5.21M | 0.56% | 48 |
|
|
2021
Q1 | $1.9M | Buy |
+6,800
| New | +$1.83M | 0.15% | 113 |
|
|
2019
Q2 | – | Sell |
-30,000
| Closed | -$7.09M | – | 91 |
|
|
2019
Q1 | $7.09M | Buy |
+30,000
| New | +$9.45M | 0.65% | 33 |
|
|
2018
Q3 | – | Sell |
-50,000
| Closed | -$14.5M | – | 115 |
|
|
2018
Q2 | $14.5M | Sell |
50,000
-15,000
| -23% | -$4.22M | 2% | 13 |
|
|
2018
Q1 | $17.8M | Sell |
65,000
-9,200
| -12% | -$2.86M | 2.7% | 10 |
|
|
2017
Q4 | $23.6M | Sell |
74,200
-30,800
| -29% | -$9.88M | 2.77% | 6 |
|
|
2017
Q3 | $32.9M | Buy |
105,000
+15,000
| +17% | +$4.44M | 4.69% | 3 |
|
|
2017
Q2 | $24.4M | Buy |
90,000
+15,000
| +20% | +$3.97M | 4.15% | 3 |
|
|
2017
Q1 | $20.5M | Buy |
+75,000
| New | +$21.2M | 4.01% | 4 |
|
|
2016
Q4 | – | Sell |
-50,000
| Closed | -$15.7M | – | 109 |
|
|
2016
Q3 | $15.7M | Sell |
50,000
-500
| -1% | -$148K | 2.55% | 8 |
|
|
2016
Q2 | $12.2M | Sell |
50,500
-68,350
| -58% | -$18M | 3.17% | 9 |
|
|
2016
Q1 | $30.9M | Sell |
118,850
-5,000
| -4% | -$1.32M | 6.71% | 4 |
|
|
2015
Q4 | $37.9M | Buy |
123,850
+38,850
| +46% | +$11.2M | 5.56% | 5 |
|
|
2015
Q3 | $24.8M | Buy |
85,000
+24,270
| +40% | +$8.01M | 3.16% | 8 |
|
|
2015
Q2 | $24.5M | Buy |
60,730
+50,730
| +507% | +$20.4M | 2.4% | 8 |
|
|
2015
Q1 | $4.22M | Sell |
10,000
-30,000
| -75% | -$11.8M | 0.44% | 58 |
|
|
2014
Q4 | $13.6M | Buy |
+40,000
| New | +$12.9M | 2.31% | 9 |
|
|
2014
Q3 | – | Sell |
-22,000
| Closed | -$6.94M | – | 130 |
|
|
2014
Q2 | $6.94M | Buy |
22,000
+5,000
| +29% | +$1.5M | 1.71% | 11 |
|
|
2014
Q1 | $5.2M | Buy |
17,000
+5,000
| +42% | +$1.59M | 1.19% | 14 |
|
|
2013
Q4 | $3.36M | Buy |
+12,000
| New | +$3.1M | 0.94% | 25 |
|
Other funds holding BIIB
VCM
VPM
Sphera Funds Management's BIIB Position: Q1 2026 in Review
Sphera Funds Management reduced its Biogen (BIIB) stake by 2.3% in Q1 2026, selling an estimated $408K and leaving 92,526 shares worth $17M. The position accounts for 2.69% of the portfolio, ranked #8.
Sphera Funds Management first reported a position in BIIB in Q4 2013 and has held it in 36 quarters since. The position peaked at $37.9M in Q4 2015. 1,004 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.
- Sphera Funds Management held 92,526 shares of Biogen worth $17M as of Q1 2026.
- Sphera Funds Management sold 2,212 Biogen shares in Q1 2026, an estimated $408K.
- Biogen made up 2.69% of Sphera Funds Management's portfolio in Q1 2026, its #8 holding.
- Sphera Funds Management first reported a position in Biogen in Q4 2013 and has held it in 36 quarters since.
- Sphera Funds Management's Biogen position peaked at $37.9M in Q4 2015.
- 1,004 funds tracked by Wall St. Rank held Biogen as of Q1 2026.
Based on Sphera Funds Management's 13F filing for Q1 2026, filed 15 May 2026.