Amgen Inc.
MX ˙ BMV ˙ NL0000888691
SecurityMX:AMGN / Amgen Inc.
InstitutionWestpac Banking Corp
Latest Disclosed Ownership26,411 shares
Latest Disclosed Value $ 9,292,711
Westpac Banking Corp reports 1.60% decrease in ownership of AMGN / Amgen Inc.

On May 11, 2026 - Westpac Banking Corp filed a 13F-HR form disclosing ownership of 26,411 shares of Amgen Inc. (MX:AMGN) valued at $9,292,711 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 26,840 shares of Amgen Inc.. This represents a change in shares of -1.60% 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)
2026-05-11 2026-03-31 13F AMGEN COM 031162100 26,411 -429 -1.60 9,293 5.77 0.3237
2026-02-10 2025-12-31 13F AMGEN COM 031162100 26,840 -1,400 -4.96 8,785 10.24 0.5549
2025-11-14 2025-09-30 13F/A-1 AMGEN INC USD 0.0001 COM 031162100 28,240 0 0.00 7,969 1.08 0.4939
2025-11-12 2025-09-30 13F AMGEN INC USD 0.0001 COM 031162100 28,240 0 7,969 0.2000
2025-08-11 2025-06-30 13F AMGEN COM 031162100 28,240 -762 -2.63 7,885 -12.74 0.5271
2025-05-13 2025-03-31 13F AMGEN COM 031162100 29,002 -912 -3.05 9,036 15.89 0.6648
2025-02-12 2024-12-31 13F AMGEN COM 031162100 29,914 551 1.88 7,797 -17.60 0.5174
2024-11-08 2024-09-30 13F AMGEN COM 031162100 29,363 1,373 4.91 9,461 8.19 0.6342
2024-08-14 2024-06-30 13F/A-1 AMGEN COM 031162100 27,990 127 0.46 8,745 10.39 0.6936
2024-08-13 2024-06-30 13F AMGEN COM 031162100 624 -27,239 8,745 0.3007
2024-05-09 2024-03-31 13F AMGEN COM 031162100 27,863 -955 -3.31 7,922 -4.55 0.6036
2024-02-08 2023-12-31 13F AMGEN COM 031162100 28,818 -2,856 -9.02 8,300 -2.49 0.6842
2023-11-13 2023-09-30 13F AMGEN COM 031162100 31,674 5,284 20.02 8,513 45.28 0.6370
2023-08-10 2023-06-30 13F AMGEN COM 031162100 26,390 -73,437 -73.56 5,859 -75.72 0.4135
2023-05-04 2023-03-31 13F AMGEN COM 031162100 99,827 -2,992 -2.91 24,133 -10.63 0.3244
2023-02-06 2022-12-31 13F AMGEN COM 031162100 102,819 285 0.28 27,004 16.84 0.3992
2022-11-08 2022-09-30 13F AMGEN COM 031162100 102,534 2,155 2.15 23,111 -5.37 0.3523
2022-08-10 2022-06-30 13F AMGEN COM 031162100 100,379 316 0.32 24,422 0.93 0.3182
2022-05-11 2022-03-31 13F AMGEN COM 031162100 100,063 -6,068 -5.72 24,197 1.34 0.2776
2022-02-08 2021-12-31 13F AMGEN COM 031162100 106,131 -3,288 -3.00 23,876 2.62 0.2473
2021-10-27 2021-09-30 13F AMGEN COM 031162100 109,419 -6,006 -5.20 23,268 -17.30 0.2487
2021-08-11 2021-06-30 13F AMGEN COM 031162100 115,425 -4,856 -4.04 28,135 -5.99 0.2825
2021-05-13 2021-03-31 13F AMGEN COM 031162100 120,281 -2,700 -2.20 29,927 5.84 0.3302
2021-02-11 2020-12-31 13F AMGEN COM 031162100 122,981 28,608 30.31 28,276 17.89 0.3209
2020-11-10 2020-09-30 13F AMGEN COM 031162100 94,373 1,010 1.08 23,986 8.92 0.3250
2020-08-12 2020-06-30 13F AMGEN COM 031162100 93,363 -6,432 -6.45 22,021 8.84 0.3282
2020-05-14 2020-03-31 13F AMGEN COM 031162100 99,795 -3,985 -3.84 20,231 -19.13 0.3486
2020-02-11 2019-12-31 13F AMGEN COM 031162100 103,780 -2,605 -2.45 25,018 21.53 0.3220
2019-11-13 2019-09-30 13F AMGEN COM 031162100 106,385 -100 -0.09 20,587 4.91 0.2862
2019-08-01 2019-06-30 13F AMGEN COM 031162100 106,485 3,484 3.38 19,623 0.28 0.2997
2019-05-14 2019-03-31 13F AMGEN COM 031162100 103,001 11,491 12.56 19,568 9.85 0.3230
2019-02-07 2018-12-31 13F AMGEN COM 031162100 91,510 0 0.00 17,814 -6.09 0.3036
2018-11-13 2018-09-30 13F AMGEN COM 031162100 91,510 -2,326 -2.48 18,969 9.51 0.3252
2018-07-18 2018-06-30 13F AMGEN COM 031162100 93,836 0 0.00 17,321 8.28 0.3328
2018-05-01 2018-03-31 13F AMGEN COM 031162100 93,836 5,533 6.27 15,997 4.18 0.3195
2018-01-18 2017-12-31 13F AMGEN COM 031162100 88,303 7,363 9.10 15,356 1.75 0.3489
2017-10-30 2017-09-30 13F AMGEN COM 031162100 80,940 -1,557 -1.89 15,091 6.21 0.3323
2017-08-09 2017-06-30 13F AMGEN COM 031162100 82,497 -47,092 -36.34 14,208 -33.17 0.3128
2017-05-18 2017-03-31 13F/A-1 AMGEN COM 031162100 129,589 45,204 53.57 21,262 63.26 0.1704
2017-05-11 2017-03-31 13F AMGEN COM 031162100 78,041 12,148
2017-02-09 2016-12-31 13F AMGEN COM 031162100 84,385 -24,048 -22.18 13,024 -28.00 0.1228
2016-11-10 2016-09-30 13F AMGEN COM 031162100 108,433 -14,010 -11.44 18,088 2.28 0.1954
2016-08-10 2016-06-30 13F AMGEN COM 031162100 122,443 -116,028 -48.65 17,684 -50.54 0.1936
2016-05-13 2016-03-31 13F AMGEN COM 031162100 238,471 -136,479 -36.40 35,754 -41.26 0.3887
2016-02-11 2015-12-31 13F AMGEN COM 031162100 374,950 -50,232 -11.81 60,866 3.52 0.6733
2015-11-16 2015-09-30 13F/A-1 AMGEN COM 031162100 425,182 -18,401 -4.15 58,795 -13.66 0.6471
2015-11-12 2015-09-30 13F AMGEN COM 031162100 425,182 58,795
2015-08-12 2015-06-30 13F AMGEN COM 031162100 443,583 133,150 42.89 68,099 25.93 0.6660
2015-05-12 2015-03-31 13F AMGEN COM 031162100 310,433 129,169 71.26 54,076 87.29 0.4698
2015-02-11 2014-12-31 13F AMGEN COM 031162100 181,264 -8,900 -4.68 28,874 8.10 0.2747
2014-11-12 2014-09-30 13F AMGEN COM 031162100 190,164 21,324 12.63 26,710 33.65 0.2603
2014-08-11 2014-06-30 13F AMGEN COM 031162100 168,840 13,235 8.51 19,986 4.13 0.1925
2014-05-12 2014-03-31 13F AMGEN COM 031162100 155,605 -22,881 -12.82 19,192 -5.77 0.2044
2014-02-13 2013-12-31 13F AMGEN COM 031162100 178,486 -569 -0.32 20,368 1.63 0.2330
2013-11-12 2013-09-30 13F AMGEN COM 031162100 179,055 -173,855 -49.26 20,042 -43.55 0.2505
2013-08-14 2013-06-30 13F AMGEN COM 031162100 352,910 352,910 35,504 0.5427
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.