Massachusetts Financial Services’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 | $134M | Buy |
720,629
+8,070
| +1% | +$1.49M | 0.04% | 318 |
|
|
2025
Q4 | $125M | Sell |
712,559
-16,757
| -2% | -$2.74M | 0.04% | 347 |
|
|
2025
Q3 | $102M | Buy |
729,316
+11,685
| +2% | +$1.58M | 0.03% | 371 |
|
|
2025
Q2 | $90.1M | Buy |
717,631
+9,216
| +1% | +$1.15M | 0.03% | 391 |
|
|
2025
Q1 | $96.9M | Sell |
708,415
-23,961
| -3% | -$3.43M | 0.03% | 386 |
|
|
2024
Q4 | $112M | Buy |
732,376
+21,192
| +3% | +$3.57M | 0.04% | 364 |
|
|
2024
Q3 | $138M | Buy |
711,184
+162,511
| +30% | +$34M | 0.04% | 345 |
|
|
2024
Q2 | $127M | Sell |
548,673
-26,302
| -5% | -$5.72M | 0.04% | 345 |
|
|
2024
Q1 | $124M | Sell |
574,975
-5,090
| -0.9% | -$1.19M | 0.04% | 349 |
|
|
2023
Q4 | $150M | Buy |
580,065
+133,463
| +30% | +$32.8M | 0.05% | 313 |
|
|
2023
Q3 | $115M | Buy |
446,602
+300,086
| +205% | +$80.3M | 0.04% | 342 |
|
|
2023
Q2 | $41.7M | Sell |
146,516
-571
| -0.4% | -$170K | 0.01% | 464 |
|
|
2023
Q1 | $40.9M | Sell |
147,087
-462
| -0.3% | -$128K | 0.01% | 465 |
|
|
2022
Q4 | $40.9M | Sell |
147,549
-80,471
| -35% | -$22.7M | 0.01% | 474 |
|
|
2022
Q3 | $60.9M | Buy |
228,020
+55,837
| +32% | +$11.9M | 0.02% | 415 |
|
|
2022
Q2 | $35.1M | Sell |
172,183
-33,373
| -16% | -$6.82M | 0.01% | 500 |
|
|
2022
Q1 | $43.3M | Sell |
205,556
-3,987
| -2% | -$867K | 0.01% | 500 |
|
|
2021
Q4 | $50.3M | Buy |
209,543
+5,561
| +3% | +$1.43M | 0.01% | 494 |
|
|
2021
Q3 | $57.7M | Buy |
203,982
+104,969
| +106% | +$34.4M | 0.02% | 472 |
|
|
2021
Q2 | $34.3M | Buy |
99,013
+63,556
| +179% | +$19.3M | 0.01% | 558 |
|
|
2021
Q1 | $9.92M | Sell |
35,457
-34,295
| -49% | -$9.25M | ﹤0.01% | 663 |
|
|
2020
Q4 | $17.1M | Sell |
69,752
-52,098
| -43% | -$13.4M | 0.01% | 608 |
|
|
2020
Q3 | $34.6M | Sell |
121,850
-64,338
| -35% | -$17.9M | 0.01% | 485 |
|
|
2020
Q2 | $49.8M | Sell |
186,188
-35,986
| -16% | -$10.8M | 0.02% | 420 |
|
|
2020
Q1 | $70.3M | Sell |
222,174
-78,559
| -26% | -$23.8M | 0.03% | 323 |
|
|
2019
Q4 | $89.2M | Sell |
300,733
-158,343
| -34% | -$43.9M | 0.03% | 345 |
|
|
2019
Q3 | $107M | Sell |
459,076
-440,319
| -49% | -$103M | 0.04% | 296 |
|
|
2019
Q2 | $210M | Sell |
899,395
-934,178
| -51% | -$216M | 0.09% | 195 |
|
|
2019
Q1 | $433M | Sell |
1,833,573
-75,998
| -4% | -$23.9M | 0.18% | 128 |
|
|
2018
Q4 | $575M | Buy |
1,909,571
+47,142
| +3% | +$15M | 0.28% | 94 |
|
|
2018
Q3 | $658M | Sell |
1,862,429
-232,576
| -11% | -$80.1M | 0.27% | 99 |
|
|
2018
Q2 | $608M | Buy |
2,095,005
+18,790
| +0.9% | +$5.28M | 0.26% | 105 |
|
|
2018
Q1 | $569M | Buy |
2,076,215
+246,436
| +13% | +$76.5M | 0.24% | 110 |
|
|
2017
Q4 | $583M | Buy |
1,829,779
+37,909
| +2% | +$12.2M | 0.24% | 105 |
|
|
2017
Q3 | $561M | Sell |
1,791,870
-47,712
| -3% | -$14.1M | 0.24% | 107 |
|
|
2017
Q2 | $499M | Buy |
1,839,582
+487,418
| +36% | +$129M | 0.22% | 113 |
|
|
2017
Q1 | $370M | Buy |
1,352,164
+1,295,540
| +2,288% | +$366M | 0.17% | 144 |
|
|
2016
Q4 | $16.1M | Buy |
56,624
+534
| +1% | +$158K | 0.01% | 529 |
|
|
2016
Q3 | $17.6M | Buy |
56,090
+1,256
| +2% | +$372K | 0.01% | 512 |
|
|
2016
Q2 | $13.3M | Sell |
54,834
-69,777
| -56% | -$18.4M | 0.01% | 547 |
|
|
2016
Q1 | $32.4M | Sell |
124,611
-246,310
| -66% | -$65.1M | 0.02% | 424 |
|
|
2015
Q4 | $114M | Sell |
370,921
-430,822
| -54% | -$124M | 0.06% | 226 |
|
|
2015
Q3 | $234M | Sell |
801,743
-755,683
| -49% | -$250M | 0.13% | 155 |
|
|
2015
Q2 | $629M | Buy |
1,557,426
+63,034
| +4% | +$25.3M | 0.32% | 85 |
|
|
2015
Q1 | $631M | Buy |
1,494,392
+47,443
| +3% | +$18.7M | 0.32% | 83 |
|
|
2014
Q4 | $491M | Sell |
1,446,949
-214,000
| -13% | -$69.2M | 0.25% | 94 |
|
|
2014
Q3 | $549M | Buy |
1,660,949
+85,500
| +5% | +$28.2M | 0.29% | 86 |
|
|
2014
Q2 | $497M | Buy |
1,575,449
+252,756
| +19% | +$76.1M | 0.26% | 90 |
|
|
2014
Q1 | $405M | Buy |
1,322,693
+70,765
| +6% | +$22.5M | 0.22% | 100 |
|
|
2013
Q4 | $350M | Buy |
1,251,928
+71,840
| +6% | +$18.6M | 0.2% | 105 |
|
|
2013
Q3 | $284M | Buy |
1,180,088
+219,587
| +23% | +$49.1M | 0.18% | 118 |
|
|
2013
Q2 | $207M | Buy |
+960,501
| New | +$205M | 0.14% | 150 |
|
Other funds holding BIIB
VCM
VPM
Massachusetts Financial Services's BIIB Position: Q1 2026 in Review
Massachusetts Financial Services increased its Biogen (BIIB) stake by 1.1% in Q1 2026, buying an estimated $1.49M and bringing the position to 720,629 shares worth $134M. The position accounts for 0.04% of the portfolio, ranked #318.
Massachusetts Financial Services first reported a position in BIIB in Q2 2013 and has held it in 52 quarters since. The position peaked at $658M in Q3 2018. 1,002 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.
- Massachusetts Financial Services held 720,629 shares of Biogen worth $134M as of Q1 2026.
- Massachusetts Financial Services bought 8,070 Biogen shares in Q1 2026, an estimated $1.49M.
- Biogen made up 0.04% of Massachusetts Financial Services's portfolio in Q1 2026, its #318 holding.
- Massachusetts Financial Services first reported a position in Biogen in Q2 2013 and has held it in 52 quarters since.
- Massachusetts Financial Services's Biogen position peaked at $658M in Q3 2018.
- 1,002 funds tracked by Wall St. Rank held Biogen as of Q1 2026.
Based on Massachusetts Financial Services's 13F filing for Q1 2026, filed 14 May 2026.