Biogen Inc.
DE ˙ DB ˙ US09062X1037
170,90 € ↑8,70 (5,36%)
2026-06-04
CENA AKCJI
SecurityDE:IDP / Biogen Inc.
InstitutionCerity Partners LLC
Latest Disclosed Ownership76,644 shares
Latest Disclosed Value $ 14,051,147
Cerity Partners LLC reports 12.11% increase in ownership of IDP / Biogen Inc.

On May 15, 2026 - Cerity Partners LLC filed a 13F-HR form disclosing ownership of 76,644 shares of Biogen Inc. (DE:IDP) valued at $11,898,981 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 68,366 shares of Biogen Inc.. This represents a change in shares of 12.11% during the quarter. The current value of the position is $13,098,460 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)
2026-05-15 2026-03-31 13F BIOGEN COM 09062X103 76,644 8,278 12.11 14,051 16.79 0.0099
2026-02-11 2025-12-31 13F BIOGEN COM 09062X103 68,366 -13,882 -16.88 12,031 4.43 0.0175
2025-10-22 2025-09-30 13F BIOGEN COM 09062X103 82,248 35,696 76.68 11,522 97.07 0.0187
2025-08-13 2025-06-30 13F BIOGEN Stock 09062X103 46,552 6,184 15.32 5,847 5.85 0.0104
2025-04-30 2025-03-31 13F BIOGEN Stock 09062X103 40,368 18,277 82.74 5,524 56.90 0.0112
2025-02-13 2024-12-31 13F BIOGEN COM 09062X103 22,091 14,306 183.76 3,520 133.42 0.0076
2024-11-12 2024-09-30 13F BIOGEN Stock 09062X103 7,785 2,030 35.27 1,509 13.13 0.0033
2024-08-13 2024-06-30 13F BIOGEN COM 09062X103 5,755 -631 -9.88 1,334 -3.20 0.0035
2024-05-14 2024-03-31 13F BIOGEN Stock 09062X103 6,386 3,708 138.46 1,377 98.70 0.0036
2024-01-26 2023-12-31 13F BIOGEN COM 09062X103 2,678 360 15.53 693 16.47 0.0023
2023-11-14 2023-09-30 13F BIOGEN COM 09062X103 2,318 -768 -24.89 596 -32.23 0.0029
2023-08-14 2023-06-30 13F BIOGEN COM 09062X103 3,086 1,344 77.15 879 -33.28 0.0034
2023-05-11 2023-03-31 13F BIOGEN COM 09062X103 1,742 -227 -11.53 1,316 141.91 0.0031
2023-02-15 2022-12-31 13F BIOGEN Stock 09062X103 1,969 386 24.38 545 28.91 0.0035
2022-11-14 2022-09-30 13F BIOGEN Stock 09062X103 1,583 82 5.46 422 38.36 0.0051
2022-08-10 2022-06-30 13F BIOGEN COM 09062X103 1,501 1,501 305 0.0034
2022-04-25 2022-03-31 13F BIOGEN Stock 09062X103 0 -860 -100.00 0 -100.00
2022-02-14 2021-12-31 13F BIOGEN Stock 09062X103 860 860 208 0.0032
2021-08-11 2021-03-31 13F/A-1 BIOGEN Stock 09062X103 0 -1,129 -100.00 0 -100.00
2021-02-11 2020-12-31 13F BIOGEN Stock 09062X103 1,129 -1,574 -58.23 277 -63.89 0.0089
2020-11-12 2020-09-30 13F BIOGEN Common Stock 09062X103 2,703 -70 -2.52 767 3.37 0.0316
2020-08-17 2020-06-30 13F/A-1 BIOGEN COM 09062X103 2,773 374 15.59 742 -2.24 0.0410
2020-08-14 2020-06-30 13F BIOGEN COM 09062X103 2,773 374 742 40,923.0745
2020-05-14 2020-03-31 13F BIOGEN COM 09062X103 2,399 -167 -6.51 759 -0.26 0.0478
2020-02-14 2019-12-31 13F BIOGEN COM 09062X103 2,566 2,566 761 0.0388
2019-08-14 2019-06-30 13F BIOGEN COM 09062X103 0 -1,502 -100.00 0 -100.00
2019-05-14 2019-03-31 13F BIOGEN COM 09062X103 1,502 -648 -30.14 355 -45.13 0.0239
2019-02-06 2018-12-31 13F BIOGEN COM 09062X103 2,150 272 14.48 647 -2.56 0.0433
2018-11-15 2018-09-30 13F BIOGEN COM 09062X103 1,878 -65 -3.35 664 17.73 0.0460
2018-08-15 2018-06-30 13F BIOGEN COM 09062X103 1,943 769 65.50 564 75.70 0.0417
2018-05-15 2018-03-31 13F BIOGEN COM 09062X103 1,174 -150 -11.33 321 -23.93 0.0245
2018-02-14 2017-12-31 13F Biogen COM 09062X103 1,324 -103 -7.22 422 -5.59 0.0283
2017-11-13 2017-09-30 13F BIOGEN COM 09062X103 1,427 -549 -27.78 447 -16.60 0.0316
2017-08-10 2017-06-30 13F Biogen COM 09062X103 1,976 208 11.76 536 10.97 0.0449
2017-05-02 2017-03-31 13F Biogen COM 09062X103 1,768 1,768 483 0.0403
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.