Biogen Inc.
US ˙ NasdaqGS ˙ US09062X1037

SecurityBIIB / Biogen Inc.
InstitutionIFP Advisors, Inc
Latest Disclosed Ownership1,151 shares
Latest Disclosed Value $ 211,013
IFP Advisors, Inc reports 4.56% decrease in ownership of BIIB / Biogen Inc.

On April 13, 2026 - IFP Advisors, Inc filed a 13F-HR form disclosing ownership of 1,151 shares of Biogen Inc. (US:BIIB) valued at $211,013 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 1,206 shares of Biogen Inc.. This represents a change in shares of -4.56% during the quarter. The current value of the position is $225,550 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)
2026-04-13 2026-03-31 13F BIOGEN cs 09062X103 1,151 -55 -4.56 211 -0.47 0.0044
2026-02-06 2025-12-31 13F BIOGEN cs 09062X103 1,206 110 10.04 212 38.56 0.0048
2026-02-06 2025-09-30 13F/A-1 BIOGEN cs 09062X103 1,096 11 1.01 154 12.50 0.0040
2025-12-02 2025-09-30 13F BIOGEN cs 09062X103 1,096 11 154 0.0040
2025-07-24 2025-06-30 13F BIOGEN cs 09062X103 1,085 220 25.43 136 15.25 0.0039
2025-05-05 2025-03-31 13F BIOGEN cs 09062X103 865 70 8.81 118 -2.48 0.0036
2025-02-04 2024-12-31 13F BIOGEN cs 09062X103 795 45 6.00 122 -16.55 0.0040
2025-02-04 2024-09-30 13F BIOGEN cs 09062X103 750 13 1.76 145 -14.71 0.0052
2024-07-30 2024-06-30 13F BIOGEN cs 09062X103 737 -80 -9.79 171 -3.41 0.0068
2024-07-30 2024-03-31 13F BIOGEN cs 09062X103 817 -1 -0.12 176 -16.59 0.0077
2024-01-09 2023-12-31 13F BIOGEN cs 09062X103 818 13 1.61 212 2.43 0.0100
2023-10-12 2023-09-30 13F BIOGEN cs 09062X103 805 -28 -3.36 207 -13.08 0.0093
2023-08-14 2023-06-30 13F/A-1 BIOGEN cs 09062X103 833 248 42.39 237 36.99 0.0099
2023-08-04 2023-06-30 13F BIOGEN cs 09062X103 833 248 247 0.0115
2023-04-18 2023-03-31 13F BIOGEN cs 09062X103 585 -532 -47.63 174 0.0076
2023-02-07 2022-12-31 13F BIOGEN cs 09062X103 1,117 -1,098 -49.57 0 -100.00 0.0089
2022-11-08 2022-09-30 13F BIOGEN cs 09062X103 2,215 152 7.37 667 8.28 0.0174
2022-09-06 2022-06-30 13F/A-1 BIOGEN cs 09062X103 2,063 0 0.00 616 0.00 0.0198
2022-08-12 2022-06-30 13F BIOGEN INC COM Stock 09062X103 7 -2,056 2 0.0036
2022-09-06 2022-03-31 13F/A-1 BIOGEN cs 09062X103 2,063 1,443 232.74 616 307.95 0.0198
2022-08-08 2022-03-31 13F BIOGEN INC COM Stock 09062X103 878 258 265 0.0054
2022-01-12 2021-12-31 13F BIOGEN INC COM Stock 09062X103 620 -10,232 -94.29 151 -95.09 0.0030
2021-10-06 2021-09-30 13F BIOGEN INC COM Stock 09062X103 10,852 318 3.02 3,077 -15.58 0.0615
2021-07-13 2021-06-30 13F BIOGEN INC COM Stock 09062X103 10,534 548 5.49 3,645 30.50 0.0754
2021-04-30 2021-03-31 13F BIOGEN INC COM Stock 09062X103 9,986 2,154 27.50 2,793 47.00 0.0544
2021-01-25 2020-12-31 13F BIOGEN INC COM Stock 09062X103 7,832 1,085 16.08 1,900 -0.68 0.0770
2020-10-29 2020-09-30 13F BIOGEN INC COM Stock 09062X103 6,747 534 8.59 1,913 17.65 0.1142
2020-08-05 2020-06-30 13F BIOGEN INC COM Stock 09062X103 6,213 5,313 590.33 1,626 489.13 0.1289
2020-05-12 2020-03-31 13F BIOGEN INC COM Stock 09062X103 900 -833 -48.07 276 -47.43 0.0279
2020-01-17 2019-12-31 13F BIOGEN INC COM Stock 09062X103 1,733 183 11.81 525 47.47 0.0395
2019-11-07 2019-09-30 13F BIOGEN INC COM Stock 09062X103 1,550 1,063 218.28 356 217.86 0.0238
2019-05-15 2019-03-31 13F BIOGEN Stock 09062X103 487 -644 -56.94 112 -66.27 0.0153
2019-06-03 2018-12-31 13F/A-10 BIOGEN IDEC Stock 09062X103 1,131 -256 -18.46 332 -32.24 0.0202
2019-01-23 2018-12-31 13F BIOGEN IDEC Stock 09062X103 1,131 -256 332 0.0202
2019-06-03 2018-09-30 13F/A-9 BIOGEN IDEC Stock 09062X103 1,387 -94 -6.35 490 13.95 0.0200
2018-10-25 2018-09-30 13F BIOGEN IDEC Stock 09062X103 1,387 -94 490 0.0200
2019-06-03 2018-06-30 13F/A-8 BIOGEN IDEC Stock 09062X103 1,481 -1,787 -54.68 430 -58.69 0.0181
2018-08-07 2018-06-30 13F BIOGEN IDEC Stock 09062X103 1,481 -309 430
2019-06-03 2018-03-31 13F/A-7 BIOGEN INC COM Stock 09062X103 3,268 0 0.00 1,041 0.00 0.0472
2018-05-09 2018-03-31 13F BIOGEN IDEC Stock 09062X103 1,790 -1,478 490
2019-06-03 2017-12-31 13F/A-6 BIOGEN INC COM Stock 09062X103 3,268 -62 -1.86 1,041 -0.19 0.0472
2018-01-24 2017-12-31 13F BIOGEN INC COM Stock 09062X103 3,268 -62 1,041
2017-10-30 2017-09-30 13F BIOGEN INC COM Stock 09062X103 3,330 1,066 47.08 1,043 69.87 0.0414
2019-06-03 2017-06-30 13F/A-5 BIOGEN INC COM Stock 09062X103 2,264 146 6.89 614 6.04 0.0260
2017-07-31 2017-06-30 13F BIOGEN INC COM Stock 09062X103 2,264 146 614
2019-06-03 2017-03-31 13F/A-4 BIOGEN INC COM Stock 09062X103 2,118 174 8.95 579 5.08 0.0252
2017-04-26 2017-03-31 13F BIOGEN INC COM Stock 09062X103 2,118 174 579
2019-06-03 2016-12-31 13F/A-3 BIOGEN INC COM Stock 09062X103 1,944 570 41.48 551 28.14 0.0266
2017-02-14 2016-12-31 13F BIOGEN INC COM Stock 09062X103 1,944 570 551
2016-11-04 2016-09-30 13F BIOGEN INC COM Stock 09062X103 1,374 6 0.44 430 29.91 0.0224
2019-06-03 2016-06-30 13F/A-2 BIOGEN INC COM Stock 09062X103 1,368 881 180.90 331 195.54 0.0185
2016-08-22 2016-06-30 13F BIOGEN INC COM Stock 09062X103 1,368 881 331
2019-06-03 2016-03-31 13F/A-1 BIOGEN Stock 09062X103 487 -2,023 -80.60 112 -85.44 0.0153
2016-05-02 2016-03-31 13F BIOGEN INC COM Stock 09062X103 1,385 -1,125 361
2016-02-11 2015-12-31 13F BIOGEN INC COM Stock 09062X103 2,510 2,510 769 0.0516
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.