Amgen Inc.
MX ˙ BMV ˙ NL0000888691
SecurityMX:AMGN / Amgen Inc.
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership1,107,159 shares
Latest Disclosed Value $ 389,509,641
Janus Henderson Group Plc reports 52.34% decrease in ownership of AMGN / Amgen Inc.

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 1,107,159 shares of Amgen Inc. (MX:AMGN) valued at $389,509,641 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 2,322,793 shares of Amgen Inc.. This represents a change in shares of -52.34% 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)
2026-05-18 2026-03-31 13F/A-1 AMGEN COM 031162100 1,107,159 -1,215,634 -52.34 389,510 -48.77 0.0657
2026-05-15 2026-03-31 13F AMGEN COM 031162100 1,107,159 -1,215,634 -52.34 389,510 -48.77 0.0723
2026-02-17 2025-12-31 13F AMGEN COM 031162100 2,322,793 -321,789 -12.17 760,300 1.88 0.3405
2025-11-14 2025-09-30 13F AMGEN COM 031162100 2,644,582 -240,353 -8.33 746,273 -7.35 0.3407
2025-08-14 2025-06-30 13F AMGEN COM 031162100 2,884,935 342,446 13.47 805,471 3.21 0.3948
2025-05-15 2025-03-31 13F AMGEN COM 031162100 2,542,489 -221,414 -8.01 780,447 8.34 0.4278
2025-02-14 2024-12-31 13F AMGEN COM 031162100 2,763,903 -2,379,427 -46.26 720,393 -56.53 0.3662
2024-11-14 2024-09-30 13F AMGEN COM 031162100 5,143,330 538,545 11.70 1,657,183 15.18 0.8482
2024-08-14 2024-06-30 13F AMGEN COM 031162100 4,604,785 2,223,652 93.39 1,438,790 112.53 0.7705
2024-05-15 2024-03-31 13F AMGEN COM 031162100 2,381,133 1,377,007 137.13 676,984 134.08 0.3693
2024-02-14 2023-12-31 13F AMGEN COM 031162100 1,004,126 73,147 7.86 289,213 15.59 0.1725
2023-11-14 2023-09-30 13F AMGEN COM 031162100 930,979 -303,402 -24.58 250,209 -8.70 0.1639
2023-08-14 2023-06-30 13F AMGEN COM 031162100 1,234,381 84,823 7.38 274,057 -1.39 0.1704
2023-05-15 2023-03-31 13F AMGEN COM 031162100 1,149,558 417,024 56.93 277,906 44.45 0.1832
2023-02-14 2022-12-31 13F AMGEN COM 031162100 732,534 495,198 208.65 192,392 259.60 0.1374
2023-01-13 2022-09-30 13F/A-1 AMGEN COM 031162100 237,336 158,921 202.67 53,501 180.37 0.0401
2022-11-14 2022-09-30 13F AMGEN COM 031162100 237,336 158,921 53,501 0.0401
2022-08-15 2022-06-30 13F AMGEN COM 031162100 78,415 -307,278 -79.67 19,082 -79.54 0.0132
2022-05-16 2022-03-31 13F AMGEN COM 031162100 385,693 -511,494 -57.01 93,265 -53.79 0.0450
2022-02-14 2021-12-31 13F AMGEN COM 031162100 897,187 -514,432 -36.44 201,844 -32.76 0.0842
2021-11-16 2021-09-30 13F AMGEN COM 031162100 1,411,619 -26,516 -1.84 300,178 -14.37 0.1313
2021-08-16 2021-06-30 13F AMGEN COM 031162100 1,438,135 464,461 47.70 350,548 44.70 0.1500
2021-05-17 2021-03-31 13F AMGEN COM 031162100 973,674 -196,611 -16.80 242,264 -9.96 0.1106
2021-02-16 2020-12-31 13F AMGEN COM 031162100 1,170,285 242,881 26.19 269,066 14.16 0.1250
2020-11-16 2020-09-30 13F AMGEN COM 031162100 927,404 297,130 47.14 235,699 58.58 0.1229
2020-08-14 2020-06-30 13F AMGEN COM 031162100 630,274 369,694 141.87 148,635 181.36 0.0834
2020-05-14 2020-03-31 13F AMGEN COM 031162100 260,580 109,254 72.20 52,828 44.86 0.0364
2020-02-18 2019-12-31 13F AMGEN COM 031162100 151,326 -94,740 -38.50 36,468 -23.41 0.0187
2019-11-14 2019-09-30 13F AMGEN COM 031162100 246,066 -135,402 -35.49 47,617 -32.26 0.0258
2019-07-31 2019-06-30 13F AMGEN COM 031162100 381,468 -81,057 -17.52 70,293 -20.00 0.0383
2019-04-30 2019-03-31 13F AMGEN COM 031162100 462,525 261,879 130.52 87,866 124.85 0.0487
2019-02-06 2018-12-31 13F AMGEN COM 031162100 200,646 4,860 2.48 39,077 -3.72 0.0249
2018-11-09 2018-09-30 13F AMGEN COM 031162100 195,786 -24,562 -11.15 40,587 -0.21 0.0217
2018-08-10 2018-06-30 13F AMGEN COM 031162100 220,348 -327,940 -59.81 40,673 -56.49 0.0232
2018-05-14 2018-03-31 13F AMGEN COM 031162100 548,288 -2,681,509 -83.02 93,471 -83.36 0.0551
2018-03-12 2017-12-31 13F/A-1 AMGEN COM 031162100 3,229,797 38,414 1.20 561,664 -5.61 0.3459
2018-02-09 2017-12-31 13F AMGEN COM 031162100 3,229,797 38,414 561,664
2017-11-14 2017-09-30 13F AMGEN COM 031162100 3,191,383 -507,968 -13.73 595,019 -6.61 0.3814
2017-08-17 2017-06-30 13F/A-1 AMGEN COM 031162100 3,699,351 3,601,087 3,664.71 637,139 3,851.49 0.4342
2017-08-14 2017-06-30 13F AMGEN COM 031162100 3,699,351 3,601,087 637,139
2017-05-03 2017-03-31 13F AMGEN COM 031162100 98,264 -1,102 -1.11 16,124 10.95 0.1132
2017-01-30 2016-12-31 13F AMGEN COM 031162100 99,366 10,721 12.09 14,533 -1.71 0.1072
2016-10-24 2016-09-30 13F AMGEN COM 031162100 88,645 -2,468 -2.71 14,786 6.64 0.1090
2016-07-29 2016-06-30 13F AMGEN COM 031162100 91,113 -6,968 -7.10 13,865 -5.71 0.1153
2016-05-12 2016-03-31 13F AMGEN COM 031162100 98,081 -74,220 -43.08 14,705 -47.42 0.1193
2016-02-03 2015-12-31 13F AMGEN COM 031162100 172,301 75,783 78.52 27,966 109.58 0.2244
2015-11-16 2015-09-30 13F AMGEN COM 031162100 96,518 0 0.00 13,344 -9.95 0.1175
2015-08-17 2015-06-30 13F AMGEN COM 031162100 96,518 -3,675 -3.67 14,818 -7.44 0.1164
2015-06-02 2015-03-31 13F/A-1 AMGEN COM 031162100 100,193 -10,109 -9.16 16,009 -8.92 0.1235
2015-05-15 2015-03-31 13F AMGEN COM 031162100 100,193 16,009
2015-02-12 2014-12-31 13F AMGEN COM 031162100 110,302 -7,356 -6.25 17,576 6.33 0.1267
2014-11-12 2014-09-30 13F AMGEN COM 031162100 117,658 -2,740 -2.28 16,530 15.98 0.1555
2014-08-13 2014-06-30 13F AMGEN COM 031162100 120,398 7,178 6.34 14,252 2.03 0.1331
2014-05-08 2014-03-31 13F AMGEN COM 031162100 113,220 4,984 4.60 13,968 13.07 0.1360
2014-01-14 2013-12-31 13F AMGEN COM 031162100 108,236 0 0.00 12,353 1.96 0.1248
2013-11-12 2013-09-30 13F AMGEN COM 031162100 108,236 3,604 3.44 12,116 18.77 0.1337
2013-08-15 2013-06-30 13F AMGEN COM 031162100 104,632 104,632 10,201 0.1193
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.