Mariner’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 | $13.2M | Buy |
72,036
+19,561
| +37% | +$3.6M | 0.02% | 626 |
|
|
2025
Q4 | $9.24M | Buy |
52,475
+4,961
| +10% | +$810K | 0.01% | 744 |
|
|
2025
Q3 | $6.66M | Buy |
47,514
+11,599
| +32% | +$1.57M | 0.01% | 795 |
|
|
2025
Q2 | $4.51M | Buy |
35,915
+11,910
| +50% | +$1.48M | 0.01% | 916 |
|
|
2025
Q1 | $3.29M | Buy |
24,005
+5,039
| +27% | +$720K | 0.01% | 978 |
|
|
2024
Q4 | $2.9M | Sell |
18,966
-1,001
| -5% | -$169K | ﹤0.01% | 1029 |
|
|
2024
Q3 | $3.87M | Sell |
19,967
-3,147
| -14% | -$658K | 0.01% | 880 |
|
|
2024
Q2 | $5.36M | Buy |
23,114
+2,038
| +10% | +$443K | 0.01% | 700 |
|
|
2024
Q1 | $4.54M | Sell |
21,076
-453
| -2% | -$106K | 0.01% | 771 |
|
|
2023
Q4 | $5.57M | Buy |
21,529
+1,868
| +10% | +$459K | 0.01% | 648 |
|
|
2023
Q3 | $5.05M | Sell |
19,661
-282
| -1% | -$75.4K | 0.01% | 641 |
|
|
2023
Q2 | $5.68M | Buy |
19,943
+1,921
| +11% | +$572K | 0.02% | 609 |
|
|
2023
Q1 | $5.01M | Sell |
18,022
-1,891
| -9% | -$523K | 0.01% | 632 |
|
|
2022
Q4 | $5.51M | Buy |
19,913
+525
| +3% | +$148K | 0.02% | 568 |
|
|
2022
Q3 | $5.18M | Buy |
19,388
+4,671
| +32% | +$992K | 0.02% | 503 |
|
|
2022
Q2 | $3M | Buy |
14,717
+245
| +2% | +$50.1K | 0.01% | 602 |
|
|
2022
Q1 | $3.05M | Buy |
14,472
+1,635
| +13% | +$356K | 0.01% | 613 |
|
|
2021
Q4 | $3.08M | Sell |
12,837
-696
| -5% | -$179K | 0.01% | 543 |
|
|
2021
Q3 | $3.83M | Buy |
13,533
+2,074
| +18% | +$680K | 0.02% | 409 |
|
|
2021
Q2 | $3.97M | Sell |
11,459
-452
| -4% | -$137K | 0.02% | 366 |
|
|
2021
Q1 | $3.33M | Buy |
11,911
+899
| +8% | +$242K | 0.02% | 366 |
|
|
2020
Q4 | $2.7M | Buy |
+11,012
| New | +$2.84M | 0.02% | 375 |
|
|
2019
Q3 | – | Sell |
-12,597
| Closed | -$2.95M | – | 721 |
|
|
2019
Q2 | $2.95M | Buy |
12,597
+869
| +7% | +$201K | 0.04% | 331 |
|
|
2019
Q1 | $2.77M | Buy |
11,728
+344
| +3% | +$108K | 0.04% | 327 |
|
|
2018
Q4 | $3.43M | Buy |
11,384
+8,243
| +262% | +$2.63M | 0.06% | 253 |
|
|
2018
Q3 | $1.11M | Buy |
3,141
+498
| +19% | +$171K | 0.03% | 392 |
|
|
2018
Q2 | $767K | Buy |
2,643
+1,637
| +163% | +$460K | 0.02% | 459 |
|
|
2018
Q1 | $275K | Buy |
+1,006
| New | +$312K | 0.01% | 541 |
|
|
2015
Q3 | – | Sell |
-721
| Closed | -$291K | – | 541 |
|
|
2015
Q2 | $291K | Sell |
721
-103
| -13% | -$41.3K | 0.01% | 421 |
|
|
2015
Q1 | $348K | Sell |
824
-391
| -32% | -$154K | 0.03% | 286 |
|
|
2014
Q4 | $412K | Buy |
1,215
+110
| +10% | +$35.6K | 0.04% | 266 |
|
|
2014
Q3 | $366K | Buy |
1,105
+187
| +20% | +$61.7K | 0.04% | 243 |
|
|
2014
Q2 | $289K | Sell |
918
-28
| -3% | -$8.43K | 0.03% | 278 |
|
|
2014
Q1 | $289K | Buy |
946
+42
| +5% | +$13.3K | 0.04% | 257 |
|
|
2013
Q4 | $253K | Buy |
+904
| New | +$234K | 0.03% | 298 |
|
Other funds holding BIIB
VCM
VPM
Mariner's BIIB Position: Q1 2026 in Review
Mariner increased its Biogen (BIIB) stake by 37% in Q1 2026, buying an estimated $3.6M and bringing the position to 72,036 shares worth $13.2M. The position accounts for 0.02% of the portfolio, ranked #626.
Mariner first reported a position in BIIB in Q4 2013 and has held it in 35 quarters since. 1,002 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.
- Mariner held 72,036 shares of Biogen worth $13.2M as of Q1 2026.
- Mariner bought 19,561 Biogen shares in Q1 2026, an estimated $3.6M.
- Biogen made up 0.02% of Mariner's portfolio in Q1 2026, its #626 holding.
- Mariner first reported a position in Biogen in Q4 2013 and has held it in 35 quarters since.
- 1,002 funds tracked by Wall St. Rank held Biogen as of Q1 2026.
Based on Mariner's 13F filing for Q1 2026, filed 13 May 2026.