Millennium 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 | $15.4M | Sell |
83,900
-17,200
| -17% | -$3.17M | 0.01% | 1764 |
|
|
2025
Q4 | $17.8M | Buy |
101,100
+15,500
| +18% | +$2.53M | 0.01% | 1689 |
|
|
2025
Q3 | $12M | Buy |
85,600
+60,800
| +245% | +$8.22M | 0.01% | 2195 |
|
|
2025
Q2 | $3.11M | Sell |
24,800
-31,200
| -56% | -$3.89M | ﹤0.01% | 3463 |
|
|
2025
Q1 | $7.66M | Buy |
56,000
+27,300
| +95% | +$3.9M | ﹤0.01% | 2451 |
|
|
2024
Q4 | $4.39M | Sell |
28,700
-900
| -3% | -$152K | ﹤0.01% | 2930 |
|
|
2024
Q3 | $5.74M | Sell |
29,600
-55,900
| -65% | -$11.7M | ﹤0.01% | 2715 |
|
|
2024
Q2 | $19.8M | Buy |
85,500
+40,900
| +92% | +$8.89M | 0.01% | 1508 |
|
|
2024
Q1 | $9.62M | Buy |
44,600
+6,800
| +18% | +$1.59M | ﹤0.01% | 2231 |
|
|
2023
Q4 | $9.78M | Buy |
37,800
+3,700
| +11% | +$909K | ﹤0.01% | 2206 |
|
|
2023
Q3 | $8.76M | Sell |
34,100
-32,400
| -49% | -$8.67M | ﹤0.01% | 2171 |
|
|
2023
Q2 | $18.9M | Buy |
66,500
+35,900
| +117% | +$10.7M | 0.01% | 1437 |
|
|
2023
Q1 | $8.51M | Sell |
30,600
-29,700
| -49% | -$8.22M | ﹤0.01% | 2118 |
|
|
2022
Q4 | $16.7M | Sell |
60,300
-66,300
| -52% | -$18.7M | 0.01% | 1614 |
|
|
2022
Q3 | $33.8M | Buy |
+126,600
| New | +$26.9M | 0.02% | 929 |
|
|
2022
Q1 | – | Sell |
-80,600
| Closed | -$19.3M | – | 6907 |
|
|
2021
Q4 | $19.3M | Sell |
80,600
-46,600
| -37% | -$12M | 0.01% | 1470 |
|
|
2021
Q3 | $36M | Buy |
127,200
+115,000
| +943% | +$37.7M | 0.02% | 848 |
|
|
2021
Q2 | $4.22M | Sell |
12,200
-30,700
| -72% | -$9.3M | ﹤0.01% | 2977 |
|
|
2021
Q1 | $12M | Sell |
42,900
-68,600
| -62% | -$18.5M | 0.01% | 1581 |
|
|
2020
Q4 | $27.3M | Buy |
111,500
+110,400
| +10,036% | +$28.5M | 0.02% | 837 |
|
|
2020
Q3 | $312 | Sell |
1,100
-11,500
| -91% | -$3.21M | ﹤0.01% | 3823 |
|
|
2020
Q2 | $3.37M | Buy |
+12,600
| New | +$3.79M | ﹤0.01% | 2117 |
|
|
2020
Q1 | – | Sell |
-11,500
| Closed | -$3.41M | – | 3856 |
|
|
2019
Q4 | $3.41M | Sell |
11,500
-180,000
| -94% | -$49.9M | ﹤0.01% | 2229 |
|
|
2019
Q3 | $44.6M | Sell |
191,500
-87,600
| -31% | -$20.4M | 0.07% | 351 |
|
|
2019
Q2 | $65.3M | Buy |
279,100
+20,000
| +8% | +$4.62M | 0.1% | 230 |
|
|
2019
Q1 | $61.2M | Buy |
259,100
+130,000
| +101% | +$40.9M | 0.09% | 277 |
|
|
2018
Q4 | $38.8M | Buy |
129,100
+120,000
| +1,319% | +$38.3M | 0.06% | 430 |
|
|
2018
Q3 | $3.21M | Sell |
9,100
-10,900
| -55% | -$3.75M | ﹤0.01% | 2103 |
|
|
2018
Q2 | $5.8M | Sell |
20,000
-55,000
| -73% | -$15.5M | 0.01% | 1710 |
|
|
2018
Q1 | $20.5M | Buy |
75,000
+45,000
| +150% | +$14M | 0.03% | 866 |
|
|
2017
Q4 | $9.56M | Buy |
+30,000
| New | +$9.62M | 0.01% | 1353 |
|
|
2017
Q2 | – | Sell |
-176,400
| Closed | -$48.2M | – | 3461 |
|
|
2017
Q1 | $48.2M | Buy |
176,400
+173,900
| +6,956% | +$49.2M | 0.09% | 323 |
|
|
2016
Q4 | $709K | Buy |
+2,500
| New | +$741K | ﹤0.01% | 2450 |
|
|
2015
Q2 | – | Sell |
-30,200
| Closed | -$12.8M | – | 3324 |
|
|
2015
Q1 | $12.8M | Buy |
+30,200
| New | +$11.9M | 0.02% | 895 |
|
|
2014
Q1 | – | Sell |
-5,000
| Closed | -$1.4M | – | 3449 |
|
|
2013
Q4 | $1.4M | Buy |
5,000
+200
| +4% | +$51.7K | ﹤0.01% | 2064 |
|
|
2013
Q3 | $1.16M | Buy |
+4,800
| New | +$1.07M | ﹤0.01% | 2014 |
|
Other funds holding BIIB
VCM
VPM
Millennium Management's BIIB Position: Q1 2026 in Review
Millennium Management reduced its Biogen (BIIB) stake by 92% in Q1 2026, selling an estimated $190M and leaving 93,964 shares worth $17.2M. The position accounts for 0.01% of the portfolio, ranked #1672.
Millennium Management first reported a position in BIIB in Q2 2013 and has held it in 52 quarters since. The position peaked at $372M in Q2 2015. 1,002 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.
- Millennium Management held 93,964 shares of Biogen worth $17.2M as of Q1 2026.
- Millennium Management sold 1,031,622 Biogen shares in Q1 2026, an estimated $190M.
- Biogen made up 0.01% of Millennium Management's portfolio in Q1 2026, its #1672 holding.
- Millennium Management first reported a position in Biogen in Q2 2013 and has held it in 52 quarters since.
- Millennium Management's Biogen position peaked at $372M in Q2 2015.
- 1,002 funds tracked by Wall St. Rank held Biogen as of Q1 2026.
Based on Millennium Management's 13F filing for Q1 2026, filed 15 May 2026.