Biogen Inc.
DE ˙ DB ˙ US09062X1037
170,90 € ↑8,70 (5,36%)
2026-06-04
AKTIENPREIS
SecurityDE:IDP / Biogen Inc.
InstitutionStifel Financial Corp
Latest Disclosed Ownership40,938 shares
Latest Disclosed Value $ 7,505,158
Stifel Financial Corp reports 20.11% decrease in ownership of IDP / Biogen Inc.

On May 12, 2026 - Stifel Financial Corp filed a 13F-HR form disclosing ownership of 40,938 shares of Biogen Inc. (DE:IDP) valued at $6,355,624 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 51,246 shares of Biogen Inc.. This represents a change in shares of -20.11% during the quarter. The current value of the position is $6,996,304 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)
2026-05-12 2026-03-31 13F BIOGEN COM 09062X103 40,938 -10,308 -20.11 7,505 -16.78 0.0016
2026-02-13 2025-12-31 13F BIOGEN COM 09062X103 51,246 13,655 36.33 9,019 71.28 0.0081
2025-11-12 2025-09-30 13F BIOGEN COM 09062X103 37,591 26,477 238.23 5,266 277.42 0.0048
2025-08-14 2025-06-30 13F BIOGEN COM 09062X103 11,114 -7,962 -41.74 1,396 -46.55 0.0014
2025-05-14 2025-03-31 13F BIOGEN COM 09062X103 19,076 6,320 49.55 2,610 33.85 0.0028
2025-02-13 2024-12-31 13F BIOGEN COM 09062X103 12,756 -34,798 -73.18 1,951 -78.84 0.0020
2024-11-14 2024-09-30 13F BIOGEN COM 09062X103 47,554 868 1.86 9,218 -14.83 0.0097
2024-08-13 2024-06-30 13F BIOGEN COM 09062X103 46,686 -12,789 -21.50 10,823 -15.61 0.0122
2024-05-14 2024-03-31 13F BIOGEN COM 09062X103 59,475 7,827 15.15 12,825 -4.04 0.0146
2024-02-12 2023-12-31 13F BIOGEN COM 09062X103 51,648 -4,079 -7.32 13,365 -6.69 0.0168
2023-11-13 2023-09-30 13F BIOGEN COM 09062X103 55,727 9,809 21.36 14,322 9.50 0.0201
2023-08-14 2023-06-30 13F BIOGEN COM 09062X103 45,918 6,213 15.65 13,080 18.48 0.0179
2023-05-12 2023-03-31 13F BIOGEN COM 09062X103 39,705 -1,831 -4.41 11,039 -4.03 0.0158
2023-02-13 2022-12-31 13F BIOGEN COM 09062X103 41,536 5,399 14.94 11,502 19.22 0.0173
2022-11-14 2022-09-30 13F BIOGEN COM 09062X103 36,137 -1,939 -5.09 9,648 24.27 0.0158
2022-08-15 2022-06-30 13F BIOGEN COM 09062X103 38,076 -6,919 -15.38 7,764 -18.08 0.0122
2022-05-13 2022-03-31 13F BIOGEN COM 09062X103 44,995 1,170 2.67 9,477 -9.86 0.0129
2022-02-14 2021-12-31 13F BIOGEN COM 09062X103 43,825 -3,420 -7.24 10,514 -21.36 0.0139
2021-11-15 2021-09-30 13F BIOGEN COM 09062X103 47,245 -2,690 -5.39 13,370 -22.67 0.0196
2021-08-13 2021-06-30 13F BIOGEN COM 09062X103 49,935 -10,336 -17.15 17,290 2.55 0.0259
2021-05-14 2021-03-31 13F BIOGEN COM 09062X103 60,271 7,125 13.41 16,860 29.57 0.0278
2021-02-12 2020-12-31 13F BIOGEN COM 09062X103 53,146 718 1.37 13,012 -12.51 0.0232
2020-11-16 2020-09-30 13F BIOGEN COM 09062X103 52,428 -1,818 -3.35 14,873 2.48 0.0306
2020-08-14 2020-06-30 13F BIOGEN COM 09062X103 54,246 -2,116 -3.75 14,513 -18.73 0.0334
2020-05-14 2020-03-31 13F BIOGEN COM 09062X103 56,362 -72,541 -56.28 17,857 -53.21 0.0493
2020-02-13 2019-12-31 13F BIOGEN COM 09062X103 128,903 47,591 58.53 38,168 101.78 0.0795
2019-11-19 2019-09-30 13F/A-1 BIOGEN COM 09062X103 81,312 -70,775 -46.54 18,916 -46.83 0.0483
2019-11-13 2019-09-30 13F BIOGEN COM 09062X103 81,080 -71,007 18,863 10,573.6570
2019-08-14 2019-06-30 13F BIOGEN COM 09062X103 152,087 -32,260 -17.50 35,576 -18.20 0.0917
2019-05-14 2019-03-31 13F BIOGEN COM 09062X103 184,347 -58,595 -24.12 43,490 -40.69 0.1229
2019-02-13 2018-12-31 13F BIOGEN COM 09062X103 242,942 2,684 1.12 73,327 -13.43 0.2371
2018-11-13 2018-09-30 13F BIOGEN COM 09062X103 240,258 18,603 8.39 84,702 31.99 0.2427
2018-08-14 2018-06-30 13F BIOGEN COM 09062X103 221,655 13,814 6.65 64,172 12.96 0.1969
2018-05-11 2018-03-31 13F BIOGEN COM 09062X103 207,841 18,283 9.65 56,807 -6.15 0.1793
2018-02-14 2017-12-31 13F BIOGEN COM 09062X103 189,558 12,464 7.04 60,528 8.88 0.1919
2017-11-13 2017-09-30 13F BIOGEN COM 09062X103 177,094 28,816 19.43 55,594 38.40 0.1930
2017-08-14 2017-06-30 13F BIOGEN COM 09062X103 148,278 34,992 30.89 40,169 29.78 0.1491
2017-05-10 2017-03-31 13F BIOGEN COM 09062X103 113,286 11,980 11.83 30,951 7.68 0.1198
2017-02-16 2016-12-31 13F BIOGEN COM 09062X103 101,306 14,715 16.99 28,743 5.91 0.1220
2016-11-15 2016-09-30 13F BIOGEN COM 09062X103 86,591 -7,272 -7.75 27,138 19.55 0.1220
2016-08-17 2016-06-30 13F BIOGEN COM 09062X103 93,863 -10,274 -9.87 22,700 -16.23 0.1050
2016-05-16 2016-03-31 13F BIOGEN IDEC COM 09062X103 104,137 -47,529 -31.34 27,097 -41.68 0.1444
2016-03-21 2015-12-31 13F/A-2 BIOGEN COM 09062X103 151,666 -6 -0.00 46,459 4.98 0.2419
2016-02-26 2015-12-31 13F/A-1 BIOGEN COM 09062X103 43,534 -108,132 23,528 0.1230
2016-02-16 2015-12-31 13F BIOGEN COM 09062X103 36,905 20,925
2015-11-16 2015-09-30 13F BIOGEN COM 09062X103 151,672 4,156 2.82 44,257 -25.59 0.2487
2015-08-17 2015-06-30 13F/A-1 BIOGEN COM 09062X103 147,516 10,775 7.88 59,475 3.01 0.3075
2015-08-17 2015-06-30 13F BIOGEN COM 09062X103 143,195 57,795
2015-05-14 2015-03-31 13F BIOGEN COM 09062X103 136,741 -14,078 -9.33 57,736 12.78 0.3160
2015-02-13 2014-12-31 13F BIOGEN IDEC COM 09062X103 150,819 5,736 3.95 51,194 6.67 0.2844
2014-11-13 2014-09-30 13F BIOGEN IDEC COM 09062X103 145,083 -1,685 -1.15 47,994 3.71 0.4213
2014-08-14 2014-06-30 13F BIOGEN IDEC COM 09062X103 146,768 -2,653 -1.78 46,277 1.26 0.4156
2014-05-15 2014-03-31 13F BIOGEN IDEC COM 09062X103 149,421 149,421 45,703 0.4373
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.