Amgen Inc.
CH ˙ SWX ˙ NL0000888691
SecurityCH:AMGN / Amgen Inc.
InstitutionAsset Management One Co., Ltd.
Latest Disclosed Ownership342,749 shares
Latest Disclosed Value $ 120,596,236
Asset Management One Co., Ltd. reports 1.17% decrease in ownership of AMGN / Amgen Inc.

On May 8, 2026 - Asset Management One Co., Ltd. filed a 13F-HR form disclosing ownership of 342,749 shares of Amgen Inc. (CH:AMGN) valued at $120,596,236 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 27, 2026 disclosing 346,808 shares of Amgen Inc.. This represents a change in shares of -1.17% 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)
2026-05-08 2026-03-31 13F AMGEN COM 031162100 342,749 -4,059 -1.17 120,596 5.50 0.3556
2026-01-27 2025-12-31 13F AMGEN COM 031162100 346,808 -3,706 -1.06 114,309 15.56 0.3178
2025-10-22 2025-09-30 13F AMGEN COM 031162100 350,514 9,753 2.86 98,915 3.96 0.2866
2025-07-31 2025-06-30 13F AMGEN COM 031162100 340,761 6,506 1.95 95,144 -8.64 0.2983
2025-04-23 2025-03-31 13F AMGEN COM 031162100 334,255 17,332 5.47 104,137 25.11 0.3602
2025-01-30 2024-12-31 13F AMGEN COM 031162100 316,923 -8,635 -2.65 83,240 -20.65 0.2860
2024-10-30 2024-09-30 13F AMGEN COM 031162100 325,558 4,323 1.35 104,898 4.51 0.3733
2024-07-18 2024-06-30 13F AMGEN COM 031162100 321,235 -11,182 -3.36 100,370 6.20 0.3840
2024-05-02 2024-03-31 13F AMGEN COM 031162100 332,417 -13,764 -3.98 94,513 -5.35 0.3643
2024-01-24 2023-12-31 13F AMGEN COM 031162100 346,181 506 0.15 99,858 7.49 0.4019
2023-10-19 2023-09-30 13F AMGEN COM 031162100 345,675 -1,004 -0.29 92,904 20.70 0.4136
2023-07-31 2023-06-30 13F AMGEN COM 031162100 346,679 12,198 3.65 76,970 -4.81 0.3258
2023-04-25 2023-03-31 13F AMGEN COM 031162100 334,481 9,043 2.78 80,861 -5.58 0.3665
2023-02-06 2022-12-31 13F AMGEN COM 031162100 325,438 -2,568 -0.78 85,637 15.83 0.4174
2022-11-04 2022-09-30 13F AMGEN COM 031162100 328,006 -4,274 -1.29 73,932 -8.55 0.3762
2022-07-29 2022-06-30 13F AMGEN COM 031162100 332,280 -3,004 -0.90 80,843 -0.29 0.3796
2022-05-13 2022-03-31 13F AMGEN COM 031162100 335,284 -11,329 -3.27 81,078 2.81 0.3165
2022-02-09 2021-12-31 13F AMGEN COM 031162100 346,613 -1,089 -0.31 78,859 6.66 0.2747
2021-11-02 2021-09-30 13F AMGEN COM 031162100 347,702 -3,711 -1.06 73,938 -13.68 0.2835
2021-08-03 2021-06-30 13F AMGEN COM 031162100 351,413 -480 -0.14 85,656 -2.17 0.3187
2021-05-14 2021-03-31 13F AMGEN COM 031162100 351,893 -11,626 -3.20 87,554 6.12 0.3477
2021-02-12 2020-12-31 13F AMGEN COM 031162100 363,519 -4,190 -1.14 82,507 -11.72 0.3398
2020-11-13 2020-09-30 13F AMGEN COM 031162100 367,709 29,956 8.87 93,456 17.31 0.4296
2020-08-14 2020-06-30 13F AMGEN COM 031162100 337,753 378 0.11 79,666 16.48 0.3918
2020-05-14 2020-03-31 13F AMGEN COM 031162100 337,375 -9,061 -2.62 68,393 -18.11 0.3994
2020-02-14 2019-12-31 13F AMGEN COM 031162100 346,436 -9,073 -2.55 83,515 21.40 0.3764
2019-11-14 2019-09-30 13F AMGEN COM 031162100 355,509 -17,633 -4.73 68,796 0.04 0.3314
2019-08-14 2019-06-30 13F AMGEN COM 031162100 373,142 21,982 6.26 68,766 3.08 0.3378
2019-05-15 2019-03-31 13F AMGEN COM 031162100 351,160 -722,274 -67.29 66,713 -68.03 0.3608
2019-02-13 2018-12-31 13F AMGEN COM 031162100 1,073,434 -17,012 -1.56 208,676 -7.72 0.4974
2018-11-14 2018-09-30 13F AMGEN COM 031162100 1,090,446 3,070 0.28 226,134 12.70 0.4641
2018-08-14 2018-06-30 13F AMGEN COM 031162100 1,087,376 -61,229 -5.33 200,643 2.47 0.4385
2018-05-14 2018-03-31 13F AMGEN COM 031162100 1,148,605 -8,527 -0.74 195,814 -2.74 0.4410
2018-02-14 2017-12-31 13F AMGEN COM 031162100 1,157,132 -989 -0.09 201,334 -6.73 0.4442
2017-11-14 2017-09-30 13F AMGEN COM 031162100 1,158,121 -3,348 -0.29 215,872 7.90 0.5068
2017-08-14 2017-06-30 13F AMGEN COM 031162100 1,161,469 -16,531 -1.40 200,062 3.50 0.5107
2017-05-11 2017-03-31 13F AMGEN COM 031162100 1,178,000 -114,603 -8.87 193,296 2.19 0.5075
2017-05-02 2016-12-31 13F/A-1 AMGEN COM 031162100 1,292,603 1,039,483 410.67 189,152 351.30 0.4835
2017-02-13 2016-12-31 13F AMGEN COM 031162100 1,331,811 194,885
2016-11-07 2016-09-30 13F AMGEN Com 031162100 253,120 -56,505 -18.25 41,913 -9.93 0.6226
2016-08-03 2016-06-30 13F AMGEN Com 031162100 309,625 -1,736 -0.56 46,536 -0.04 0.6982
2016-05-05 2016-03-31 13F AMGEN Com 031162100 311,361 -9,309 -2.90 46,553 -11.63 0.6795
2016-01-28 2015-12-31 13F AMGEN Com 031162100 320,670 6,148 1.95 52,680 24.83 0.7863
2015-11-12 2015-09-30 13F AMGEN Com 031162100 314,522 14,498 4.83 42,202 -7.31 0.6423
2015-08-06 2015-06-30 13F AMGEN Com 031162100 300,024 -16,334 -5.16 45,529 -12.23 0.6309
2015-05-11 2015-03-31 13F AMGEN Com 031162100 316,358 43,535 15.96 51,871 17.00 0.6404
2015-02-09 2014-12-31 13F AMGEN Com 031162100 272,823 167,983 160.23 44,334 201.74 0.5753
2014-11-05 2014-09-30 13F AMGEN Com 031162100 104,840 1,891 1.84 14,693 20.40 0.2029
2014-08-12 2014-06-30 13F AMGEN Com 031162100 102,949 -25,570 -19.90 12,203 -21.86 0.1821
2014-05-05 2014-03-31 13F AMGEN Com 031162100 128,519 1,556 1.23 15,616 7.14 0.2461
2014-02-05 2013-12-31 13F/A-1 AMGEN COM 031162100 126,963 15,933 14.35 14,576 16.15 0.2259
2014-01-29 2013-12-31 13F AMGEN COM 031162100 126,963 14,576
2014-02-05 2013-09-30 13F/A-1 AMGEN Com 031162100 111,030 -8,623 -7.21 12,549 6.02 0.1888
2013-11-06 2013-09-30 13F AMGEN Com 031162100 111,030 12,549
2014-02-12 2013-06-30 13F/A-1 AMGEN COM 031162100 119,653 119,653 11,837 0.1922
2013-08-05 2013-06-30 13F AMGEN Com 031162100 119,653 11,837
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.