바이오젠(주)
MX ˙ BMV ˙ US09062X1037
SecurityMX:BIIB / Biogen Inc.
InstitutionLsv Asset Management
Latest Disclosed Ownership333,739 shares
Latest Disclosed Value $ 61,184
Lsv Asset Management reports 5.34% increase in ownership of BIIB / Biogen Inc.

On May 11, 2026 - Lsv Asset Management filed a 13F-HR form disclosing ownership of 333,739 shares of Biogen Inc. (MX:BIIB) valued at $61,184 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 316,815 shares of Biogen Inc.. This represents a change in shares of 5.34% 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)
2026-05-11 2026-03-31 13F Biogen COM 09062X103 333,739 16,924 5.34 61 10.91 0.1318
2026-02-06 2025-12-31 13F Biogen COM 09062X103 316,815 9,976 3.25 56 30.95 0.1216
2025-11-06 2025-09-30 13F Biogen COM 09062X103 306,839 54,880 21.78 43 35.48 0.0949
2025-08-11 2025-06-30 13F Biogen COM 09062X103 251,959 9,983 4.13 32 -6.06 0.0741
2025-05-09 2025-03-31 13F Biogen COM 09062X103 241,976 7,528 3.21 33 -5.71 0.0795
2025-02-13 2024-12-31 13F Biogen COM 09062X103 234,448 192,948 464.93 36 337.50 0.0828
2024-11-12 2024-09-30 13F Biogen COM 09062X103 41,500 41,500 8 0.0172
2024-05-06 2024-03-31 13F Biogen COM 09062X103 0 -117,030 -100.00 0 -100.00
2024-02-06 2023-12-31 13F Biogen COM 09062X103 117,030 -227,622 -66.04 30 -65.91 0.0661
2023-11-03 2023-09-30 13F Biogen COM 09062X103 344,652 -8,772 -2.48 89 -12.00 0.2060
2023-08-02 2023-06-30 13F Biogen COM 09062X103 353,424 -13,030 -3.56 101 -0.99 0.2220
2023-05-02 2023-03-31 13F Biogen COM 09062X103 366,454 7,600 2.12 102 2.02 0.2285
2023-02-08 2022-12-31 13F Biogen COM 09062X103 358,854 -10,268 -2.78 99 -99.90 0.2191
2022-11-07 2022-09-30 13F/A-1 Biogen COM 09062X103 369,122 -1,330 -0.36 98,556 30.45 0.2315
2022-11-04 2022-09-30 13F Biogen COM 09062X103 370,452 0 75,550 0.1634
2022-08-10 2022-06-30 13F Biogen COM 09062X103 370,452 -3,198 -0.86 75,550 -3.99 0.1634
2022-05-12 2022-03-31 13F Biogen COM 09062X103 373,650 18,628 5.25 78,691 -7.61 0.1444
2022-01-28 2021-12-31 13F Biogen COM 09062X103 355,022 -6,580 -1.82 85,177 -16.76 0.1509
2021-11-04 2021-09-30 13F Biogen COM 09062X103 361,602 1,432 0.40 102,329 -17.95 0.1850
2021-08-04 2021-06-30 13F Biogen COM 09062X103 360,170 -557,961 -60.77 124,716 -51.44 0.2121
2021-04-30 2021-03-31 13F Biogen COM 09062X103 918,131 -20,210 -2.15 256,847 11.79 0.4388
2021-02-08 2020-12-31 13F Biogen COM 09062X103 938,341 -50,751 -5.13 229,762 -18.11 0.4176
2020-10-23 2020-09-30 13F Biogen COM 09062X103 989,092 -18,666 -1.85 280,585 4.06 0.5740
2020-08-05 2020-06-30 13F Biogen COM 09062X103 1,007,758 -67,119 -6.24 269,625 -20.71 0.5590
2020-05-07 2020-03-31 13F Biogen COM 09062X103 1,074,877 -44,956 -4.01 340,069 2.34 0.8217
2020-02-10 2019-12-31 13F Biogen COM 09062X103 1,119,833 1,869 0.17 332,288 27.66 0.5179
2019-11-07 2019-09-30 13F Biogen COM 09062X103 1,117,964 50,220 4.70 260,284 4.23 0.4303
2019-08-08 2019-06-30 13F/A-1 Biogen COM 09062X103 1,067,744 144,830 15.69 249,713 14.46 0.4023
2019-08-07 2019-06-30 13F Biogen COM 09062X103 922,914 0 218,158
2019-05-07 2019-03-31 13F Biogen COM 09062X103 922,914 142,412 18.25 218,158 -7.11 0.3495
2019-02-05 2018-12-31 13F Biogen COM 09062X103 780,502 21,391 2.82 234,868 -12.43 0.4172
2018-11-06 2018-09-30 13F Biogen COM 09062X103 759,111 168,183 28.46 268,201 56.38 0.4012
2018-08-08 2018-06-30 13F Biogen COM 09062X103 590,928 28,269 5.02 171,510 11.32 0.2683
2018-05-04 2018-03-31 13F Biogen COM 09062X103 562,659 69,220 14.03 154,067 -1.99 0.2447
2018-01-31 2017-12-31 13F Biogen COM 09062X103 493,439 7,705 1.59 157,194 3.35 0.2481
2017-11-13 2017-09-30 13F Biogen COM 09062X103 485,734 40,195 9.02 152,093 25.80 0.2509
2017-08-09 2017-06-30 13F Biogen COM 09062X103 445,539 411,170 1,196.34 120,901 1,186.59 0.2153
2017-05-01 2017-03-31 13F Biogen COM 09062X103 34,369 3,300 10.62 9,397 6.66 0.0171
2017-02-07 2016-12-31 13F Biogen COM 09062X103 31,069 4,949 18.95 8,810 7.75 0.0162
2016-11-07 2016-09-30 13F Biogen COM 09062X103 26,120 4,900 23.09 8,176 59.35 0.0161
2016-08-05 2016-06-30 13F Biogen COM 09062X103 21,220 11,000 107.63 5,131 92.89 0.0105
2016-05-10 2016-03-31 13F Biogen COM 09062X103 10,220 10,220 1,281.08 2,660 1,394.38 0.0056
2014-02-05 2013-12-31 13F Biogen Idec COM 09062X103 0 -740 -100.00 0 -100.00
2013-11-08 2013-09-30 13F Biogen Idec COM 09062X103 740 740 178 0.0005
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.