Tortoise Investment Management’s Biogen BIIB Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2025
Q4 | – | Sell |
-56
| Closed | -$7.84K | – | 372 |
|
|
2025
Q3 | $7.84K | Buy |
56
+7
| +14% | +$946 | ﹤0.01% | 646 |
|
|
2025
Q2 | $6.15K | Buy |
49
+9
| +23% | +$1.12K | ﹤0.01% | 637 |
|
|
2025
Q1 | $5.47K | Hold |
40
| – | – | ﹤0.01% | 628 |
|
|
2024
Q4 | $6.12K | Hold |
40
| – | – | ﹤0.01% | 670 |
|
|
2024
Q3 | $7.75K | Hold |
40
| – | – | ﹤0.01% | 657 |
|
|
2024
Q2 | $9.27K | Hold |
40
| – | – | ﹤0.01% | 642 |
|
|
2024
Q1 | $8.63K | Hold |
40
| – | – | ﹤0.01% | 643 |
|
|
2023
Q4 | $10.4K | Hold |
40
| – | – | ﹤0.01% | 572 |
|
|
2023
Q3 | $10.3K | Hold |
40
| – | – | ﹤0.01% | 555 |
|
|
2023
Q2 | $11.4K | Hold |
40
| – | – | ﹤0.01% | 535 |
|
|
2023
Q1 | $11.1K | Hold |
40
| – | – | ﹤0.01% | 532 |
|
|
2022
Q4 | $11.1K | Hold |
40
| – | – | ﹤0.01% | 526 |
|
|
2022
Q3 | $11K | Hold |
40
| – | – | ﹤0.01% | 508 |
|
|
2022
Q2 | $8K | Hold |
40
| – | – | ﹤0.01% | 540 |
|
|
2022
Q1 | $8K | Hold |
40
| – | – | ﹤0.01% | 517 |
|
|
2021
Q4 | $10K | Hold |
40
| – | – | ﹤0.01% | 479 |
|
|
2021
Q3 | $11K | Hold |
40
| – | – | ﹤0.01% | 454 |
|
|
2021
Q2 | $14K | Hold |
40
| – | – | ﹤0.01% | 425 |
|
|
2021
Q1 | $11K | Hold |
40
| – | – | ﹤0.01% | 424 |
|
|
2020
Q4 | $10K | Hold |
40
| – | – | ﹤0.01% | 410 |
|
|
2020
Q3 | $11K | Hold |
40
| – | – | ﹤0.01% | 366 |
|
|
2020
Q2 | $11K | Hold |
40
| – | – | ﹤0.01% | 353 |
|
|
2020
Q1 | $13K | Hold |
40
| – | – | ﹤0.01% | 341 |
|
|
2019
Q4 | $12K | Hold |
40
| – | – | ﹤0.01% | 375 |
|
|
2019
Q3 | $9K | Hold |
40
| – | – | ﹤0.01% | 408 |
|
|
2019
Q2 | $9K | Sell |
40
-8
| -17% | -$1.85K | ﹤0.01% | 436 |
|
|
2019
Q1 | $11K | Hold |
48
| – | – | ﹤0.01% | 397 |
|
|
2018
Q4 | $14K | Hold |
48
| – | – | ﹤0.01% | 348 |
|
|
2018
Q3 | $17K | Hold |
48
| – | – | ﹤0.01% | 339 |
|
|
2018
Q2 | $14K | Sell |
48
-20
| -29% | -$5.62K | ﹤0.01% | 373 |
|
|
2018
Q1 | $19K | Buy |
68
+60
| +750% | +$18.6K | 0.01% | 328 |
|
|
2017
Q4 | $3K | Buy |
+8
| New | +$2.57K | ﹤0.01% | 487 |
|
|
2015
Q1 | – | Sell |
-25
| Closed | -$8K | – | 427 |
|
|
2014
Q4 | $8K | Buy |
+25
| New | +$8.09K | ﹤0.01% | 329 |
|
Other funds holding BIIB
Tortoise Investment Management's BIIB Position: Q4 2025 in Review
Tortoise Investment Management sold out of Biogen (BIIB) in Q4 2025, closing a stake of 56 shares — an estimated $7.84K sold.
Tortoise Investment Management first reported a position in BIIB in Q4 2014 and held it in 33 quarters. The position peaked at $19K in Q1 2018. 1,000 funds tracked by Wall St. Rank hold BIIB as of Q4 2025.
- Tortoise Investment Management reported no remaining Biogen position as of Q4 2025 after selling out during the quarter.
- Tortoise Investment Management sold 56 Biogen shares in Q4 2025, an estimated $7.84K.
- Tortoise Investment Management first reported a position in Biogen in Q4 2014 and held it in 33 quarters.
- Tortoise Investment Management's Biogen position peaked at $19K in Q1 2018.
- 1,000 funds tracked by Wall St. Rank held Biogen as of Q4 2025.
Based on Tortoise Investment Management's 13F filing for Q4 2025, filed 6 Feb 2026.