百健公司
MX ˙ BMV ˙ US09062X1037
SecurityMX:BIIB / Biogen Inc.
InstitutionWealthfront Advisers Llc
Latest Disclosed Ownership15,679 shares
Latest Disclosed Value $ 2,874,431
Wealthfront Advisers Llc reports 0.82% increase in ownership of BIIB / Biogen Inc.

On May 5, 2026 - Wealthfront Advisers Llc filed a 13F-HR form disclosing ownership of 15,679 shares of Biogen Inc. (MX:BIIB) valued at $2,874,431 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 30, 2026 disclosing 15,551 shares of Biogen Inc.. This represents a change in shares of 0.82% 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)
2026-05-05 2026-03-31 13F BIOGEN COM 09062X103 15,679 128 0.82 2,874 5.04 0.0063
2026-01-30 2025-12-31 13F BIOGEN COM 09062X103 15,551 4,227 37.33 2,737 72.51 0.0061
2025-11-06 2025-09-30 13F BIOGEN COM 09062X103 11,324 2,640 30.40 1,586 45.50 0.0037
2025-07-31 2025-06-30 13F BIOGEN COM 09062X103 8,684 4,899 129.43 1,091 110.83 0.0028
2025-05-02 2025-03-31 13F BIOGEN COM 09062X103 3,785 1,949 106.15 518 84.64 0.0014
2025-04-01 2024-12-31 13F/A-1 BIOGEN COM 09062X103 1,836 -1,316 -41.75 281 -54.10 0.0008
2025-02-07 2024-12-31 13F BIOGEN COM 09062X103 53,858 50,706 12,363 0.0373
2024-11-12 2024-09-30 13F BIOGEN COM 09062X103 3,152 -371 -10.53 611 -25.25 0.0019
2024-08-14 2024-06-30 13F BIOGEN COM 09062X103 3,523 -2,138 -37.77 817 -33.11 0.0027
2024-04-19 2024-03-31 13F BIOGEN COM 09062X103 5,661 -271 -4.57 1,221 -20.52 0.0043
2024-02-09 2023-12-31 13F BIOGEN COM 09062X103 5,932 332 5.93 1,535 6.67 0.0059
2023-11-01 2023-09-30 13F BIOGEN COM 09062X103 5,600 -4,941 -46.87 1,439 -52.07 0.0062
2023-08-07 2023-06-30 13F BIOGEN COM 09062X103 10,541 205 1.98 3,003 4.49 0.0127
2023-04-28 2023-03-31 13F BIOGEN COM 09062X103 10,336 3,825 58.75 2,874 59.35 0.0131
2023-02-10 2022-12-31 13F BIOGEN COM 09062X103 6,511 133 2.09 1,803 5.87 0.0087
2022-11-14 2022-09-30 13F BIOGEN COM 09062X103 6,378 1,869 41.45 1,703 85.11 0.0091
2022-07-20 2022-06-30 13F BIOGEN COM 09062X103 4,509 -5,526 -55.07 920 -56.46 0.0046
2022-05-16 2022-03-31 13F BIOGEN COM 09062X103 10,035 7,508 297.11 2,113 248.68 0.0093
2022-01-21 2021-12-31 13F BIOGEN COM 09062X103 2,527 -8,077 -76.17 606 -79.81 0.0026
2021-11-15 2021-09-30 13F BIOGEN COM 09062X103 10,604 -169 -1.57 3,001 -19.54 0.0139
2021-08-16 2021-06-30 13F BIOGEN COM 09062X103 10,773 1,572 17.09 3,730 44.91 0.0177
2021-05-14 2021-03-31 13F BIOGEN COM 09062X103 9,201 2,872 45.38 2,574 66.17 0.0138
2021-02-16 2020-12-31 13F BIOGEN COM 09062X103 6,329 550 9.52 1,549 -5.49 0.0093
2020-11-16 2020-09-30 13F BIOGEN COM 09062X103 5,779 -2,154 -27.15 1,639 -22.76 0.0117
2020-08-14 2020-06-30 13F BIOGEN COM 09062X103 7,933 -1,974 -19.93 2,122 -32.29 0.0165
2020-05-15 2020-03-31 13F BIOGEN COM 09062X103 9,907 1,265 14.64 3,134 22.23 0.0285
2020-01-21 2019-12-31 13F BIOGEN COM 09062X103 8,642 3,986 85.61 2,564 136.53 0.0190
2019-10-15 2019-09-30 13F BIOGEN COM 09062X103 4,656 201 4.51 1,084 4.03 0.0091
2019-08-13 2019-06-30 13F BIOGEN COM 09062X103 4,455 2,658 147.91 1,042 145.18 0.0091
2019-05-13 2019-03-31 13F BIOGEN COM 09062X103 1,797 -7,201 -80.03 425 -84.31 0.0039
2019-02-14 2018-12-31 13F BIOGEN COM 09062X103 8,998 8,998 2,708 0.0288
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.