Biogen Inc.
GB ˙ LSE ˙ US09062X1037
197,61 $ ↓ -0,67 (-0,34%)
2026-06-05
DEL PRIS
SecurityGB:0R1B / Biogen Inc.
InstitutionQuadrant Capital Group Llc
Latest Disclosed Ownership8,168 shares
Latest Disclosed Value $ 1,497,440
Quadrant Capital Group Llc reports 5.72% decrease in ownership of 0R1B / Biogen Inc.

On May 13, 2026 - Quadrant Capital Group Llc filed a 13F-HR/A form disclosing ownership of 8,168 shares of Biogen Inc. (GB:0R1B) valued at $1,463,297 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 8,664 shares of Biogen Inc.. This represents a change in shares of -5.72% during the quarter. The current value of the position is $1,614,078 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)
2026-05-13 2026-03-31 13F/A-1 BIOGEN COM 09062X103 8,168 -496 -5.72 1,497 -1.77 0.0448
2026-05-11 2026-03-31 13F BIOGEN COM 09062X103 8,168 -496 49 0.0369
2026-02-12 2025-12-31 13F BIOGEN COM 09062X103 8,664 136 1.59 1,525 27.64 0.0461
2025-11-13 2025-09-30 13F BIOGEN COM 09062X103 8,528 356 4.36 1,195 16.37 0.0388
2025-08-13 2025-06-30 13F BIOGEN COM 09062X103 8,172 6,616 425.19 1,026 383.96 0.0369
2025-05-13 2025-03-31 13F BIOGEN COM 09062X103 1,556 887 132.59 213 107.84 0.0079
2025-02-13 2024-12-31 13F BIOGEN COM 09062X103 669 263 64.78 102 30.77 0.0070
2024-11-12 2024-09-30 13F BIOGEN COM 09062X103 406 -77 -15.94 79 -29.73 0.0055
2024-08-12 2024-06-30 13F BIOGEN COM 09062X103 483 57 13.38 112 21.98 0.0083
2024-05-15 2024-03-31 13F BIOGEN COM 09062X103 426 -276 -39.32 92 -49.72 0.0073
2024-02-08 2023-12-31 13F BIOGEN COM 09062X103 702 66 10.38 182 11.04 0.0156
2023-11-14 2023-09-30 13F BIOGEN COM 09062X103 636 -88 -12.15 163 -20.87 0.0164
2023-08-10 2023-06-30 13F BIOGEN COM 09062X103 724 -5 -0.69 206 1.98 0.0205
2023-05-11 2023-03-31 13F BIOGEN COM 09062X103 729 -111 -13.21 203 -12.93 0.0211
2023-02-13 2022-12-31 13F BIOGEN COM 09062X103 840 453 117.05 233 125.24 0.0264
2022-11-10 2022-09-30 13F BIOGEN COM 09062X103 387 -108 -21.82 103 1.98 0.0136
2022-08-09 2022-06-30 13F BIOGEN COM 09062X103 495 20 4.21 101 1.00 0.0136
2022-05-06 2022-03-31 13F BIOGEN COM 09062X103 475 10 2.15 100 -10.71 0.0121
2022-02-01 2021-12-31 13F BIOGEN COM 09062X103 465 -168 -26.54 112 -37.43 0.0134
2021-11-12 2021-09-30 13F BIOGEN COM 09062X103 633 0 0.00 179 -18.26 0.0250
2021-08-09 2021-06-30 13F BIOGEN COM 09062X103 633 -156 -19.77 219 -0.90 0.0318
2021-05-12 2021-03-31 13F BIOGEN COM 09062X103 789 127 19.18 221 36.42 0.0359
2021-02-16 2020-12-31 13F BIOGEN COM 09062X103 662 -29 -4.20 162 -17.35 0.0301
2020-11-13 2020-09-30 13F BIOGEN COM 09062X103 691 130 23.17 196 30.67 0.0427
2020-08-13 2020-06-30 13F BIOGEN COM 09062X103 561 -988 -63.78 150 -69.57 0.0332
2020-05-15 2020-03-31 13F Biogen Com 09062X103 1,549 302 24.22 493 38.10 0.0825
2020-03-19 2019-12-31 13F/A-1 Biogen Com 09062X103 1,247 287 29.90 357 66.82 0.0431
2020-02-03 2019-12-31 13F Biogen Com 09062X103 1,247 287 357 1,206.3496
2019-10-24 2019-09-30 13F Biogen COM 09062X103 960 231 31.69 214 31.29 0.0329
2019-07-24 2019-06-30 13F Biogen COM 09062X103 729 -537 -42.42 163 -42.81 0.0258
2019-04-29 2019-03-31 13F Biogen COM 09062X103 1,266 732 137.08 285 97.92 0.0501
2019-01-17 2018-12-31 13F BIOGEN COM 09062X103 534 42 8.54 144 -9.43 0.0384
2018-10-29 2018-09-30 13F BIOGEN COM 09062X103 492 5 1.03 159 29.27 0.0454
2018-08-08 2018-06-30 13F BIOGEN COM 09062X103 487 61 14.32 123 24.24 0.0431
2018-05-10 2018-03-31 13F BIOGEN COM 09062X103 426 -16 -3.62 99 -22.05 0.0359
2018-01-31 2017-12-31 13F Biogen COM 09062X103 442 36 8.87 127 9.48 0.0506
2017-10-13 2017-09-30 13F Biogen COM 09062X103 406 22 5.73 116 50.65 0.0479
2017-08-14 2017-06-30 13F Biogen COM 09062X103 384 -35 -8.35 77 -23.76 0.0340
2017-04-10 2017-03-31 13F Biogen COM 09062X103 419 -34 -7.51 101 -11.40 0.0444
2017-01-11 2016-12-31 13F Biogen COM 09062X103 453 -17 -3.62 114 -16.18 0.0572
2016-10-25 2016-09-30 13F Biogen COM 09062X103 470 34 7.80 136 37.37 0.0887
2016-07-28 2016-06-30 13F Biogen COM 09062X103 436 147 50.87 99 43.48 0.0681
2016-04-27 2016-03-31 13F Biogen COM 09062X103 289 -957 -76.81 69 -81.65 0.0447
2016-01-28 2015-12-31 13F Biogen COM 09062X103 1,246 1,031 479.53 376 548.28 0.2602
2015-10-28 2015-09-30 13F Biogen COM 09062X103 215 -491 -69.55 58 -79.29 0.0400
2015-08-12 2015-06-30 13F Biogen COM 09062X103 706 706 280 0.1782
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.