Amgen Inc.
MX ˙ BMV ˙ NL0000888691
SecurityMX:AMGN / Amgen Inc.
InstitutionBoston Partners
Latest Disclosed Ownership643,175 shares
Latest Disclosed Value $ 226,286,117
Boston Partners reports 11.26% decrease in ownership of AMGN / Amgen Inc.

On May 11, 2026 - Boston Partners filed a 13F-HR form disclosing ownership of 643,175 shares of Amgen Inc. (MX:AMGN) valued at $226,286,117 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 724,793 shares of Amgen Inc.. This represents a change in shares of -11.26% 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 643,175 -81,618 -11.26 226,286 -4.61 0.1013
2026-02-13 2025-12-31 13F AMGEN COM 031162100 724,793 1,059 0.15 237,219 16.05 0.2456
2025-11-13 2025-09-30 13F AMGEN COM 031162100 723,734 -24,652 -3.29 204,412 -2.22 0.2099
2025-08-12 2025-06-30 13F/A-1 AMGEN COM 031162100 748,386 -55,019 -6.85 209,048 -16.45 0.2322
2025-08-07 2025-06-30 13F AMGEN COM 031162100 746,916 -56,489 208,637 0.0958
2025-05-13 2025-03-31 13F AMGEN COM 031162100 803,405 -1,458,208 -64.48 250,215 -57.62 0.3026
2025-02-11 2024-12-31 13F AMGEN COM 031162100 2,261,613 -30,567 -1.33 590,449 -20.01 0.7182
2024-11-12 2024-09-30 13F AMGEN COM 031162100 2,292,180 -2,230 -0.10 738,153 2.78 0.8712
2024-08-14 2024-06-30 13F AMGEN COM 031162100 2,294,410 57,076 2.55 718,219 13.07 0.8922
2024-05-28 2024-03-31 13F/A-1 AMGEN COM 031162100 2,237,334 481,214 27.40 635,179 25.27 0.7566
2024-05-13 2024-03-31 13F AMGEN COM 031162100 2,237,334 481,214 635,179 0.7565
2024-02-07 2023-12-31 13F AMGEN COM 031162100 1,756,120 -224,579 -11.34 507,039 -4.57 0.6715
2023-11-08 2023-09-30 13F AMGEN COM 031162100 1,980,699 -26,420 -1.32 531,294 18.78 0.7356
2023-08-10 2023-06-30 13F AMGEN COM 031162100 2,007,119 178,152 9.74 447,310 1.20 0.6021
2023-05-09 2023-03-31 13F AMGEN COM 031162100 1,828,967 868,298 90.38 441,993 75.21 0.6076
2023-02-08 2022-12-31 13F AMGEN COM 031162100 960,669 -190,671 -16.56 252,262 -2.84 0.3412
2022-11-09 2022-09-30 13F AMGEN COM 031162100 1,151,340 -29,919 -2.53 259,643 -9.66 0.3800
2022-08-10 2022-06-30 13F AMGEN COM 031162100 1,181,259 26,858 2.33 287,406 2.94 0.4017
2022-05-10 2022-03-31 13F AMGEN COM 031162100 1,154,401 19,366 1.71 279,187 9.34 0.3382
2022-02-04 2021-12-31 13F AMGEN COM 031162100 1,135,035 412,337 57.06 255,349 66.17 0.3076
2021-11-05 2021-09-30 13F AMGEN COM 031162100 722,698 29,760 4.29 153,670 -9.02 0.1947
2021-08-12 2021-06-30 13F AMGEN COM 031162100 692,938 -475,983 -40.72 168,902 -41.94 0.2154
2021-05-10 2021-03-31 13F AMGEN COM 031162100 1,168,921 196,342 20.19 290,926 30.10 0.3901
2021-02-10 2020-12-31 13F/A-1 AMGEN COM 031162100 972,579 952,081 4,644.75 223,616 4,192.05 0.3478
2021-02-04 2020-12-31 13F AMGEN COM 031162100 972,579 952,081 223,616 134,156.3086
2020-11-13 2020-09-30 13F/A-1 AMGEN COM 031162100 20,498 -1,213 -5.59 5,210 1.74 0.0095
2020-11-09 2020-09-30 13F AMGEN COM 031162100 21,711 0 5,121 3,759.4240
2020-08-12 2020-06-30 13F AMGEN COM 031162100 21,711 7,640 54.30 5,121 79.50 0.0094
2020-05-13 2020-03-31 13F AMGEN COM 031162100 14,071 1,764 14.33 2,853 -3.84 0.0057
2020-02-06 2019-12-31 13F/A-1 AMGEN COM 031162100 12,307 4,250 52.75 2,967 90.31 0.0039
2019-11-20 2019-09-30 13F/A-1 AMGEN COM 031162100 8,057 -2,779 -25.65 1,559 -21.93 0.0021
2019-11-08 2019-09-30 13F AMGEN COM 031162100 10,836 0 1,997 0.0026
2019-08-26 2019-06-30 13F/A-1 AMGEN COM 031162100 10,836 348 3.32 1,997 0.20 0.0026
2019-08-09 2019-06-30 13F AMGEN COM 031162100 10,836 348 1,997
2019-05-13 2019-03-31 13F/A-1 AMGEN COM 031162100 10,488 0 0.00 1,993 -2.40 0.0026
2019-05-03 2019-03-31 13F AMGEN COM 031162100 10,488 0 1,993
2019-02-07 2018-12-31 13F AMGEN COM 031162100 10,488 -49 -0.47 2,042 -6.50 0.0029
2018-11-14 2018-09-30 13F AMGEN COM 031162100 10,537 362 3.56 2,184 16.29 0.0025
2018-08-03 2018-06-30 13F AMGEN COM 031162100 10,175 223 2.24 1,878 10.67 0.0023
2018-05-04 2018-03-31 13F AMGEN COM 031162100 9,952 698 7.54 1,697 5.47 0.0020
2018-02-14 2017-12-31 13F/A-1 AMGEN COM 031162100 9,254 -643 -6.50 1,609 -12.79 0.0019
2018-02-01 2017-12-31 13F AMGEN COM 031162100 9,254 -643 1,609
2017-11-02 2017-09-30 13F AMGEN COM 031162100 9,897 -1,429 -12.62 1,845 -5.43 0.0023
2017-08-02 2017-06-30 13F AMGEN COM 031162100 11,326 -3,860 -25.42 1,951 -21.71 0.0025
2017-05-03 2017-03-31 13F AMGEN COM 031162100 15,186 3,833 33.76 2,492 50.12 0.0032
2017-02-06 2016-12-31 13F AMGEN COM 031162100 11,353 -728,258 -98.47 1,660 -98.65 0.0022
2016-11-09 2016-09-30 13F AMGEN COM 031162100 739,611 -751,758 -50.41 123,374 -45.63 0.1725
2016-08-05 2016-06-30 13F AMGEN COM 031162100 1,491,369 35,489 2.44 226,912 3.95 0.3279
2016-05-12 2016-03-31 13F AMGEN COM 031162100 1,455,880 18,988 1.32 218,280 -6.42 0.3215
2016-02-08 2015-12-31 13F AMGEN COM 031162100 1,436,892 -9,973 -0.69 233,251 16.55 0.3341
2015-11-10 2015-09-30 13F AMGEN COM 031162100 1,446,865 -110,772 -7.11 200,130 -16.31 0.3051
2015-08-10 2015-06-30 13F AMGEN COM 031162100 1,557,637 -304,666 -16.36 239,128 -19.67 0.3435
2015-05-05 2015-03-31 13F AMGEN COM 031162100 1,862,303 41,146 2.26 297,689 2.62 0.4432
2015-02-09 2014-12-31 13F AMGEN COM 031162100 1,821,157 -1,230,655 -40.33 290,093 -32.33 0.4354
2014-11-12 2014-09-30 13F AMGEN COM 031162100 3,051,812 -14,821 -0.48 428,657 18.09 0.6957
2014-08-08 2014-06-30 13F AMGEN COM 031162100 3,066,633 -1,904,332 -38.31 362,997 -40.80 0.6080
2014-05-07 2014-03-31 13F AMGEN COM 031162100 4,970,965 -154,702 -3.02 613,119 4.78 1.1184
2014-02-06 2013-12-31 13F AMGEN COM 031162100 5,125,667 13,425 0.26 585,147 2.25 1.1996
2013-11-12 2013-09-30 13F AMGEN COM 031162100 5,112,242 -93,067 -1.79 572,265 11.43 1.3799
2013-08-01 2013-06-30 13F AMGEN COM 031162100 5,205,309 5,205,309 513,555 1.4138
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.