Amgen Inc.
MX ˙ BMV ˙ NL0000888691
SecurityMX:AMGN / Amgen Inc.
InstitutionChesapeake Wealth Management
Latest Disclosed Ownership3,334 shares
Latest Disclosed Value $ 1,173,067
Chesapeake Wealth Management reports 2.49% decrease in ownership of AMGN / Amgen Inc.

On May 18, 2026 - Chesapeake Wealth Management filed a 13F-HR form disclosing ownership of 3,334 shares of Amgen Inc. (MX:AMGN) valued at $1,173,067 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 3, 2026 disclosing 3,419 shares of Amgen Inc.. This represents a change in shares of -2.49% 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.

Upgrade to unlock premium data and export to Excel .

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 AMGEN COM 031162100 3,334 -85 -2.49 1,173 4.83 0.2017
2026-02-03 2025-12-31 13F AMGEN COM 031162100 3,419 -24 -0.70 1,119 15.24 0.3333
2025-11-03 2025-09-30 13F AMGEN COM 031162100 3,443 19 0.55 972 1.57 0.2964
2025-07-28 2025-06-30 13F AMGEN COM 031162100 3,424 -20 -0.58 956 -10.82 0.3188
2025-05-08 2025-03-31 13F AMGEN COM 031162100 3,444 -186 -5.12 1,073 13.32 0.3827
2025-01-16 2024-12-31 13F AMGEN COM 031162100 3,630 -69 -1.87 946 -20.57 0.3245
2024-11-07 2024-09-30 13F AMGEN COM 031162100 3,699 -17 -0.46 1,192 2.58 0.4067
2024-08-13 2024-06-30 13F AMGEN COM 031162100 3,716 -177 -4.55 1,161 4.97 0.4211
2024-05-07 2024-03-31 13F AMGEN COM 031162100 3,893 -125 -3.11 1,107 -4.41 0.4035
2024-02-12 2023-12-31 13F AMGEN COM 031162100 4,018 -55 -1.35 1,157 5.76 0.4469
2023-11-16 2023-09-30 13F AMGEN COM 031162100 4,073 -102 -2.44 1,095 18.14 0.4565
2023-08-01 2023-06-30 13F AMGEN COM 031162100 4,175 -75 -1.76 927 -9.83 0.3654
2023-04-25 2023-03-31 13F AMGEN COM 031162100 4,250 -37 -0.86 1,027 -8.71 0.4285
2023-02-23 2022-12-31 13F AMGEN COM 031162100 4,287 0 0.00 1,126 16.46 0.4931
2022-10-28 2022-09-30 13F AMGEN COM 031162100 4,287 -51 -1.18 966 -8.44 0.4410
2022-07-21 2022-06-30 13F AMGEN COM 031162100 4,338 -34 -0.78 1,055 -0.19 0.4512
2022-04-19 2022-03-31 13F AMGEN COM 031162100 4,372 -134 -2.97 1,057 4.24 0.3839
2022-02-03 2021-12-31 13F AMGEN COM 031162100 4,506 -360 -7.40 1,014 -1.93 0.3413
2021-10-26 2021-09-30 13F AMGEN COM 031162100 4,866 -1,310 -21.21 1,034 -31.34 0.3697
2021-07-29 2021-06-30 13F AMGEN COM 031162100 6,176 -441 -6.66 1,506 -8.56 0.4885
2021-04-26 2021-03-31 13F AMGEN COM 031162100 6,617 -253 -3.68 1,647 4.24 0.5512
2021-02-05 2020-12-31 13F AMGEN COM 031162100 6,870 -158 -2.25 1,580 -11.53 0.5381
2020-11-12 2020-09-30 13F AMGEN COM 031162100 7,028 -57 -0.80 1,786 6.88 0.6673
2020-08-11 2020-06-30 13F AMGEN COM 031162100 7,085 -4 -0.06 1,671 16.28 0.6649
2020-04-29 2020-03-31 13F AMGEN COM 031162100 7,089 773 12.24 1,437 -5.58 0.6638
2020-01-29 2019-12-31 13F AMGEN COM 031162100 6,316 -40 -0.63 1,522 23.74 0.5866
2019-10-25 2019-09-30 13F AMGEN COM 031162100 6,356 12 0.19 1,230 5.22 0.5013
2019-08-01 2019-06-30 13F AMGEN COM 031162100 6,344 -2,293 -26.55 1,169 -28.72 0.4887
2019-04-17 2019-03-31 13F AMGEN COM 031162100 8,637 543 6.71 1,640 4.06 0.7209
2019-02-06 2018-12-31 13F AMGEN COM 031162100 8,094 1,573 24.12 1,576 16.57 0.7804
2018-11-14 2018-09-30 13F AMGEN COM 031162100 6,521 -115 -1.73 1,352 10.37 0.6011
2018-08-07 2018-06-30 13F AMGEN COM 031162100 6,636 -142 -2.10 1,225 5.97 0.5650
2018-06-04 2018-03-31 13F AMGEN COM 031162100 6,778 6,778 1,156 0.5338
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.