Biogen Inc.
DE ˙ DB ˙ US09062X1037
170,90 € ↑8,70 (5,36%)
2026-06-04
AKTIENPREIS
SecurityDE:IDP / Biogen Inc.
InstitutionWestpac Banking Corp
Latest Disclosed Ownership1,843 shares
Latest Disclosed Value $ 337,877
Westpac Banking Corp reports 15.38% decrease in ownership of IDP / Biogen Inc.

On May 11, 2026 - Westpac Banking Corp filed a 13F-HR form disclosing ownership of 1,843 shares of Biogen Inc. (DE:IDP) valued at $286,126 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 2,178 shares of Biogen Inc.. This represents a change in shares of -15.38% during the quarter. The current value of the position is $314,969 USD.

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 1,843 -335 -15.38 338 -12.01 0.0118
2026-02-10 2025-12-31 13F BIOGEN COM 09062X103 2,178 340 18.50 383 49.03 0.0242
2025-11-14 2025-09-30 13F/A-1 BIOGEN INC USD 0.0005 COM 09062X103 1,838 -1,797 -49.44 257 -43.64 0.0160
2025-11-12 2025-09-30 13F BIOGEN INC USD 0.0005 COM 09062X103 1,838 -1,797 257 0.0065
2025-08-11 2025-06-30 13F BIOGEN COM 09062X103 3,635 0 0.00 457 -8.25 0.0305
2025-05-13 2025-03-31 13F BIOGEN COM 09062X103 3,635 1,050 40.62 497 25.82 0.0366
2025-02-12 2024-12-31 13F BIOGEN COM 09062X103 2,585 436 20.29 395 -5.05 0.0262
2024-11-08 2024-09-30 13F BIOGEN COM 09062X103 2,149 243 12.75 417 -5.67 0.0279
2024-08-14 2024-06-30 13F/A-1 BIOGEN COM 09062X103 1,906 0 0.00 442 7.56 0.0350
2024-08-13 2024-06-30 13F BIOGEN COM 09062X103 232 -1,674 442 0.0152
2024-05-09 2024-03-31 13F BIOGEN COM 09062X103 1,906 -19 -0.99 411 -17.67 0.0313
2024-02-08 2023-12-31 13F BIOGEN COM 09062X103 1,925 270 16.31 498 17.18 0.0411
2023-11-13 2023-09-30 13F BIOGEN COM 09062X103 1,655 196 13.43 425 2.41 0.0318
2023-08-10 2023-06-30 13F BIOGEN COM 09062X103 1,459 -14,406 -90.80 416 -90.59 0.0293
2023-05-04 2023-03-31 13F BIOGEN COM 09062X103 15,865 -2,317 -12.74 4,411 -12.40 0.0593
2023-02-06 2022-12-31 13F BIOGEN COM 09062X103 18,182 -654 -3.47 5,035 0.10 0.0744
2022-11-08 2022-09-30 13F BIOGEN COM 09062X103 18,836 -28,900 -60.54 5,029 -48.34 0.0767
2022-08-10 2022-06-30 13F BIOGEN COM 09062X103 47,736 277 0.58 9,735 -2.59 0.1268
2022-05-11 2022-03-31 13F BIOGEN COM 09062X103 47,459 -5,471 -10.34 9,995 -21.29 0.1147
2022-02-08 2021-12-31 13F BIOGEN COM 09062X103 52,930 30,475 135.72 12,699 99.84 0.1316
2021-10-27 2021-09-30 13F BIOGEN COM 09062X103 22,455 -3,609 -13.85 6,355 -29.60 0.0679
2021-08-11 2021-06-30 13F BIOGEN COM 09062X103 26,064 -5,396 -17.15 9,025 2.56 0.0906
2021-05-13 2021-03-31 13F BIOGEN COM 09062X103 31,460 1,259 4.17 8,801 19.00 0.0971
2021-02-11 2020-12-31 13F BIOGEN COM 09062X103 30,201 -23,756 -44.03 7,395 -51.69 0.0839
2020-11-10 2020-09-30 13F BIOGEN COM 09062X103 53,957 -9,569 -15.06 15,307 -9.94 0.2074
2020-08-12 2020-06-30 13F BIOGEN COM 09062X103 63,526 4,316 7.29 16,996 -9.27 0.2534
2020-05-14 2020-03-31 13F BIOGEN COM 09062X103 59,210 13,496 29.52 18,733 38.10 0.3228
2020-02-11 2019-12-31 13F BIOGEN COM 09062X103 45,714 -28,550 -38.44 13,565 -21.55 0.1746
2019-11-13 2019-09-30 13F BIOGEN COM 09062X103 74,264 -13,224 -15.12 17,290 -15.49 0.2404
2019-08-01 2019-06-30 13F BIOGEN COM 09062X103 87,488 8,816 11.21 20,461 10.02 0.3125
2019-05-14 2019-03-31 13F BIOGEN COM NEW 09062X103 78,672 14,536 22.66 18,596 -3.64 0.3070
2019-02-07 2018-12-31 13F BIOGEN COM 09062X103 64,136 1,694 2.71 19,300 -12.52 0.3289
2018-11-13 2018-09-30 13F BIOGEN COM 09062X103 62,442 43,570 230.87 22,061 302.79 0.3782
2018-07-18 2018-06-30 13F BIOGEN COM 09062X103 18,872 0 0.00 5,477 6.00 0.1052
2018-05-01 2018-03-31 13F BIOGEN COM 09062X103 18,872 4,843 34.52 5,168 15.62 0.1032
2018-01-18 2017-12-31 13F BIOGEN COM 09062X103 14,029 0 0.00 4,469 1.75 0.1015
2017-10-30 2017-09-30 13F BIOGEN COM 09062X103 14,029 -386 -2.68 4,393 12.30 0.0967
2017-08-09 2017-06-30 13F BIOGEN COM 09062X103 14,415 -34,634 -70.61 3,912 -70.84 0.0861
2017-05-18 2017-03-31 13F/A-1 BIOGEN COM 09062X103 49,049 15,566 46.49 13,411 17.16 0.1075
2017-05-11 2017-03-31 13F BIOGEN COM 09062X103 34,257 9,239
2017-02-09 2016-12-31 13F BIOGEN COM 09062X103 33,483 -4,265 -11.30 11,446 -3.13 0.1079
2016-11-10 2016-09-30 13F BIOGEN COM 09062X103 37,748 2,151 6.04 11,816 49.00 0.1276
2016-08-10 2016-06-30 13F BIOGEN COM 09062X103 35,597 -52,413 -59.55 7,931 -57.17 0.0868
2016-05-13 2016-03-31 13F BIOGEN COM 09062X103 88,010 12,058 15.88 18,517 -20.42 0.2013
2016-02-11 2015-12-31 13F BIOGEN COM 09062X103 75,952 -54,977 -41.99 23,268 -39.05 0.2574
2015-11-16 2015-09-30 13F/A-1 BIOGEN COM 09062X103 130,929 -385,203 -74.63 38,173 -81.69 0.4201
2015-11-12 2015-09-30 13F BIOGEN COM 09062X103 130,929 38,173
2015-08-12 2015-06-30 13F BIOGEN COM 09062X103 516,132 68,481 15.30 208,486 4.91 2.0390
2015-05-12 2015-03-31 13F BIOGEN COM 09062X103 447,651 -89,984 -16.74 198,728 8.88 1.7265
2015-02-11 2014-12-31 13F BIOGEN IDEC COM 09062X103 537,635 19,400 3.74 182,519 6.46 1.7363
2014-11-12 2014-09-30 13F BIOGEN IDEC COM 09062X103 518,235 422,317 440.29 171,437 466.87 1.6708
2014-08-11 2014-06-30 13F BIOGEN IDEC COM 09062X103 95,918 10,142 11.82 30,244 15.27 0.2914
2014-05-12 2014-03-31 13F BIOGEN IDEC COM 09062X103 85,776 17,930 26.43 26,236 38.28 0.2794
2014-02-13 2013-12-31 13F BIOGEN IDEC COM 09062X103 67,846 44,552 191.26 18,973 238.32 0.2171
2013-11-12 2013-09-30 13F BIOGEN IDEC COM 09062X103 23,294 3,350 16.80 5,608 36.48 0.0701
2013-08-14 2013-06-30 13F BIOGEN IDEC COM 09062X103 19,944 19,944 4,110 0.0628
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.