Biogen Inc.
DE ˙ DB ˙ US09062X1037
170,90 € ↑8,70 (5,36%)
2026-06-04
DEL PRIS
SecurityDE:IDP / Biogen Inc.
InstitutionWhittier Trust Co
Latest Disclosed Ownership699 shares
Latest Disclosed Value $ 120,465
Whittier Trust Co reports 8.75% decrease in ownership of IDP / Biogen Inc.

On April 28, 2026 - Whittier Trust Co filed a 13F-HR form disclosing ownership of 699 shares of Biogen Inc. (DE:IDP) valued at $108,520 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 766 shares of Biogen Inc.. This represents a change in shares of -8.75% during the quarter. The current value of the position is $119,459 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)
2026-04-28 2026-03-31 13F BIOGEN IDEC common 09062X103 699 -67 -8.75 120 -13.67 0.0007
2026-01-26 2025-12-31 13F BIOGEN IDEC common 09062X103 766 -410 -34.86 140 -26.06 0.0015
2025-10-31 2025-09-30 13F BIOGEN common 09062X103 1,176 0 0.00 188 27.89 0.0021
2025-07-30 2025-06-30 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 1,176 -12 -1.01 148 -9.26 0.0018
2025-05-02 2025-03-31 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 1,188 -68 -5.41 163 -15.62 0.0023
2025-02-11 2024-12-31 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 1,256 -112 -8.19 192 -27.55 0.0025
2024-10-21 2024-09-30 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 1,368 -215 -13.58 265 -27.60 0.0035
2024-07-29 2024-06-30 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 1,583 -2,304 -59.27 367 -56.32 0.0052
2024-05-02 2024-03-31 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 3,887 -210 -5.13 838 -20.94 0.0122
2024-01-11 2023-12-31 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 4,097 136 3.43 1,060 4.13 0.0172
2023-10-27 2023-09-30 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 3,961 -22 -0.55 1,018 -10.23 0.0181
2023-07-24 2023-06-30 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 3,983 -43 -1.07 1,135 1.34 0.0197
2023-04-21 2023-03-31 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 4,026 0 0.00 1,119 0.45 0.0204
2023-01-25 2022-12-31 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 4,026 -38 -0.94 1,115 2.67 0.0217
2022-10-21 2022-09-30 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 4,064 -267 -6.16 1,085 22.88 0.0227
2022-07-28 2022-06-30 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 4,331 -774 -15.16 883 -17.86 0.0178
2022-04-29 2022-03-31 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 5,105 69 1.37 1,075 -11.01 0.0181
2022-01-19 2021-12-31 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 5,036 -243 -4.60 1,208 -19.14 0.0196
2021-11-01 2021-09-30 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 5,279 0 0.00 1,494 -18.27 0.0272
2021-07-29 2021-06-30 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 5,279 -943 -15.16 1,828 5.00 0.0326
2021-04-26 2021-03-31 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 6,222 444 7.68 1,741 23.04 0.0338
2021-01-29 2020-12-31 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 5,778 -797 -12.12 1,415 -24.13 0.0302
2020-10-30 2020-09-30 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 6,575 -97 -1.45 1,865 4.48 0.0444
2020-07-10 2020-06-30 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 6,672 -468 -6.55 1,785 -20.98 0.0496
2020-04-27 2020-03-31 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 7,140 -355 -4.74 2,259 1.62 0.0738
2020-01-31 2019-12-31 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 7,495 691 10.16 2,223 40.34 0.0583
2019-10-18 2019-09-30 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 6,804 -8,862 -56.57 1,584 -56.76 0.0453
2019-07-23 2019-06-30 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 15,666 -827 -5.01 3,663 -6.05 0.1076
2019-04-29 2019-03-31 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 16,493 420 2.61 3,899 -19.39 0.1192
2019-02-07 2018-12-31 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 16,073 260 1.64 4,837 -13.42 0.1664
2018-10-23 2018-09-30 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 15,813 19 0.12 5,587 21.88 0.1743
2018-07-27 2018-06-30 13F/A-1 BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 15,794 -109 -0.69 4,584 5.26 0.1514
2018-07-20 2018-06-30 13F BIOGEN IDEC US LARGE CAP EQUITIES 09062X103 12,241 -3,662 3,859
2018-05-01 2018-03-31 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 15,903 -4,407 -21.70 4,355 -32.69 0.1463
2018-02-07 2017-12-31 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 20,310 372 1.87 6,470 3.64 0.2257
2017-10-23 2017-09-30 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 19,938 746 3.89 6,243 19.87 0.2275
2017-07-20 2017-06-30 13F BIOGEN IDEC US LARGE-CAP EQUITIES 09062X103 19,192 1,201 6.68 5,208 5.88 0.2014
2017-04-26 2017-03-31 13F BIOGEN US LARGE CAP EQUITIES 09062X103 17,991 761 4.42 4,919 0.68 0.1984
2017-01-18 2016-12-31 13F BIOGEN IDEC US LARGE CAP EQUITIES 09062X103 17,230 -23,004 -57.18 4,886 -61.20 0.2078
2016-11-10 2016-09-30 13F BIOGEN IDEC US LARGE CAP EQUITIES 09062X103 40,234 -193 -0.48 12,594 28.83 0.5485
2016-07-28 2016-06-30 13F BIOGEN IDEC US LARGE CAP EQUITIES 09062X103 40,427 443 1.11 9,776 -6.08 0.4307
2016-04-28 2016-03-31 13F BIOGEN IDEC US LARGE CAP EQUITIES 09062X103 39,984 690 1.76 10,409 -13.52 0.4603
2016-02-10 2015-12-31 13F BIOGEN IDEC US LARGE CAP EQUITIES 09062X103 39,294 16,434 71.89 12,037 80.46 0.5462
2015-11-12 2015-09-30 13F BIOGEN IDEC US LARGE CAP EQUITIES 09062X103 22,860 9,562 71.91 6,670 24.19 0.3244
2015-08-13 2015-06-30 13F BIOGEN IDEC US LARGE CAP EQUITIES 09062X103 13,298 0 0.00 5,371 -4.35 0.2384
2015-05-05 2015-03-31 13F BIOGEN IDEC US LARGE CAP EQUITIES 09062X103 13,298 13,298 0.00 5,615 0.2574
2015-02-04 2014-12-31 13F BIOGEN IDEC US LARGE CAP EQUITIES 09062X103 0 -13,335 -100.00 0 -100.00
2014-11-07 2014-09-30 13F BIOGEN IDEC US LARGE CAP EQUITIES 09062X103 13,335 1,094 8.94 4,411 14.30 0.2149
2014-08-04 2014-06-30 13F BIOGEN IDEC US LARGE CAP EQUITIES 09062X103 12,241 0 0.00 3,859 3.07 0.1903
2014-05-01 2014-03-31 13F BIOGEN IDEC US LARGE CAP EQUITIES 09062X103 12,241 -512 -4.01 3,744 4.99 0.1918
2014-02-05 2013-12-31 13F BIOGEN IDEC US LARGE CAP EQUITIES 09062X103 12,753 -94 -0.73 3,566 15.29 0.1829
2013-11-18 2013-09-30 13F BIOGEN IDEC COM 09062X103 12,847 94 0.74 3,093 12.68 0.1674
2013-08-14 2013-06-30 13F BIOGEN IDEC COM 09062X103 12,753 12,753 2,745 0.1538
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.