百健公司
MX ˙ BMV ˙ US09062X1037
SecurityMX:BIIB / Biogen Inc.
InstitutionAdvisory Services Network, LLC
Latest Disclosed Ownership1,612 shares
Latest Disclosed Value $ 295,493
Advisory Services Network, LLC reports 3.00% increase in ownership of BIIB / Biogen Inc.

On May 15, 2026 - Advisory Services Network, LLC filed a 13F-HR form disclosing ownership of 1,612 shares of Biogen Inc. (MX:BIIB) valued at $295,493 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,565 shares of Biogen Inc.. This represents a change in shares of 3.00% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F BIOGEN Stock 09062X103 1,612 47 3.00 295 7.27 0.0027
2026-02-17 2025-12-31 13F BIOGEN Stock 09062X103 1,565 -227 -12.67 275 9.56 0.0039
2025-11-18 2025-09-30 13F BIOGEN Stock 09062X103 1,792 68 3.94 251 14.09 0.0037
2025-08-19 2025-06-30 13F BIOGEN Stock 09062X103 1,724 -344 -16.63 221 -21.99 0.0036
2025-05-15 2025-03-31 13F BIOGEN Stock 09062X103 2,068 -654 -24.03 283 -32.21 0.0054
2025-02-13 2024-12-31 13F BIOGEN Stock 09062X103 2,722 -484 -15.10 416 -44.01 0.0078
2024-11-14 2024-09-30 13F BIOGEN Stock 09062X103 3,206 0 0.00 743 0.00 0.0154
2024-08-13 2024-06-30 13F BIOGEN Stock 09062X103 3,206 -457 -12.48 743 -5.83 0.0154
2024-05-06 2024-03-31 13F BIOGEN Stock 09062X103 3,663 1,308 55.54 790 29.56 0.0175
2024-02-09 2023-12-31 13F BIOGEN Stock 09062X103 2,355 -860 -26.75 609 -26.27 0.0149
2023-11-14 2023-09-30 13F BIOGEN Stock 09062X103 3,215 -1,305 -28.87 826 -35.82 0.0222
2023-08-09 2023-06-30 13F BIOGEN Stock 09062X103 4,520 -753 -14.28 1,288 -12.21 0.0343
2023-05-17 2023-03-31 13F BIOGEN Stock 09062X103 5,273 376 7.68 1,466 8.11 0.0406
2023-02-13 2022-12-31 13F BIOGEN Stock 09062X103 4,897 1,631 49.94 1,356 55.50 0.0416
2022-11-14 2022-09-30 13F BIOGEN Stock 09062X103 3,266 -353 -9.75 872 18.00 0.0308
2022-08-02 2022-06-30 13F BIOGEN Stock 09062X103 3,619 -531 -12.80 739 -15.45 0.0253
2022-05-23 2022-03-31 13F BIOGEN Stock 09062X103 4,150 534 14.77 874 0.69 0.0257
2022-02-14 2021-12-31 13F BIOGEN Stock 09062X103 3,616 -516 -12.49 868 -25.81 0.0250
2021-11-05 2021-09-30 13F BIOGEN Stock 09062X103 4,132 -176 -4.09 1,170 -21.58 0.0372
2021-08-12 2021-06-30 13F BIOGEN Stock 09062X103 4,308 -247 -5.42 1,492 17.11 0.0471
2021-05-24 2021-03-31 13F BIOGEN Stock 09062X103 4,555 1,544 51.28 1,274 72.63 0.0473
2021-02-09 2020-12-31 13F BIOGEN Stock 09062X103 3,011 -57 -1.86 738 -15.17 0.0296
2020-11-16 2020-09-30 13F BIOGEN Stock 09062X103 3,068 20 0.66 870 6.75 0.0409
2020-08-10 2020-06-30 13F BIOGEN Stock 09062X103 3,048 626 25.85 815 6.40 0.0447
2020-05-15 2020-03-31 13F BIOGEN Stock 09062X103 2,422 -1,906 -44.04 766 -40.34 0.0501
2020-02-04 2019-12-31 13F BIOGEN Stock 09062X103 4,328 922 27.07 1,284 61.10 0.0675
2019-11-04 2019-09-30 13F BIOGEN Stock 09062X103 3,406 0 0.00 797 0.00 0.0488
2019-08-01 2019-06-30 13F BIOGEN Stock 09062X103 3,406 568 20.01 797 18.78 0.0489
2019-05-20 2019-03-31 13F BIOGEN Stock 09062X103 2,838 -514 -15.33 671 -33.50 0.0471
2019-02-15 2018-12-31 13F BIOGEN Stock 09062X103 3,352 -76 -2.22 1,009 -16.68 0.0881
2018-11-02 2018-09-30 13F BIOGEN Stock 09062X103 3,428 -2,391 -41.09 1,211 -39.63 0.0884
2018-07-27 2018-06-30 13F BIOGEN Stock 09062X103 5,819 -1,120 -16.14 2,006 5.58 0.1528
2018-04-23 2018-03-31 13F BIOGEN Stock 09062X103 6,939 746 12.05 1,900 -3.70 0.1518
2018-02-08 2017-12-31 13F BIOGEN Stock 09062X103 6,193 329 5.61 1,973 7.46 0.1720
2017-10-12 2017-09-30 13F BIOGEN Stock 09062X103 5,864 2,903 98.04 1,836 128.64 0.2102
2017-08-17 2017-06-30 13F BIOGEN INC COM Stock 09062X103 2,961 58 2.00 803 1.13 0.1047
2017-04-28 2017-03-31 13F BIOGEN INC COM Stock 09062X103 2,903 648 28.74 794 12.46 0.1153
2016-10-07 2016-09-30 13F BIOGEN Stock 09062X103 2,255 251 12.52 706 45.57 0.1327
2016-07-27 2016-06-30 13F BIOGEN Stock 09062X103 2,004 437 27.89 485 18.87 0.1102
2016-04-21 2016-03-31 13F BIOGEN Stock 09062X103 1,567 -114 -6.78 408 -20.78 0.1114
2016-01-27 2015-12-31 13F BIOGEN INC COM Stock 09062X103 1,681 253 17.72 515 23.50 0.1656
2015-10-01 2015-09-30 13F BIOGEN IDEC Stock 09062X103 1,428 -965 -40.33 417 -57.01 0.1259
2015-07-02 2015-06-30 13F BIOGEN IDEC Stock 09062X103 2,393 -447 -15.74 970 -17.38 0.2861
2015-04-08 2015-03-31 13F BIOGEN INC COM Stock 09062X103 2,840 912 47.30 1,174 67.71 0.3242
2015-01-23 2014-12-31 13F BIOGEN IDEC INC COM Stock 09062X103 1,928 -2,106 -52.21 700 -47.53 0.2188
2014-10-07 2014-09-30 13F BIOGEN IDEC INC COM Stock 09062X103 4,034 -1,202 -22.96 1,334 -19.20 0.4878
2014-07-10 2014-06-30 13F BIOGEN IDEC Stock 09062X103 5,236 136 2.67 1,651 5.83 0.6989
2014-04-09 2014-03-31 13F BIOGEN IDEC INC COM Stock 09062X103 5,100 1,605 45.92 1,560 59.67 0.8043
2014-02-13 2013-12-31 13F BIOGEN IDEC Stock 09062X103 3,495 3,495 977 0.4906
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.