Amgen Inc.
US ˙ NasdaqGS ˙ US0311621009

SecurityAMGN / Amgen Inc.
InstitutionSlateStone Wealth, LLC
Latest Disclosed Ownership37,665 shares
Latest Disclosed Value $ 13,252
SlateStone Wealth, LLC reports 3.74% increase in ownership of AMGN / Amgen Inc.

On May 14, 2026 - SlateStone Wealth, LLC filed a 13F-HR form disclosing ownership of 37,665 shares of Amgen Inc. (US:AMGN) valued at $13,252,430 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 36,308 shares of Amgen Inc.. This represents a change in shares of 3.74% during the quarter. The current value of the position is $12,739,056 USD.

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)
2026-05-14 2026-03-31 13F Amgen COM 031162100 37,665 1,357 3.74 13 18.18 1.0925
2026-02-11 2025-12-31 13F Amgen COM 031162100 36,308 476 1.33 12 10.00 0.9945
2025-11-05 2025-09-30 13F Amgen COM 031162100 35,832 650 1.85 10 11.11 0.8753
2025-08-12 2025-06-30 13F Amgen COM 031162100 35,182 361 1.04 10 -10.00 0.9184
2025-05-08 2025-03-31 13F Amgen COM 031162100 34,821 -32 -0.09 11 11.11 1.0888
2025-02-10 2024-12-31 13F Amgen COM 031162100 34,853 -172 -0.49 9 -18.18 0.8911
2024-11-07 2024-09-30 13F Amgen COM 031162100 35,025 11,979 51.98 11 57.14 1.0162
2024-07-25 2024-06-30 13F Amgen COM 031162100 23,046 -8,819 -27.68 7 -22.22 0.7803
2024-04-26 2024-03-31 13F Amgen COM 031162100 31,865 14,592 84.48 9 125.00 0.9098
2024-02-01 2023-12-31 13F Amgen COM 031162100 17,273 3,125 22.09 5 33.33 0.6457
2023-10-12 2023-09-30 13F Amgen COM 031162100 14,148 10,486 286.35 4 0.5530
2023-08-07 2023-06-30 13F Amgen COM 031162100 3,662 -3,475 -48.69 1 -100.00 0.1523
2023-08-08 2023-03-31 13F Amgen COM 031162100 7,137 -494 -6.47 2 -99.95 0.3572
2023-02-01 2022-12-31 13F Amgen COM 031162100 7,631 459 6.40 2,004 23.93 0.4835
2022-11-03 2022-09-30 13F Amgen COM 031162100 7,172 604 9.20 1,617 1.19 0.4303
2022-08-04 2022-06-30 13F Amgen COM 031162100 6,568 -74 -1.11 1,598 -0.50 0.4082
2022-05-04 2022-03-31 13F Amgen COM 031162100 6,642 3,801 133.79 1,606 151.33 0.3581
2022-02-02 2021-12-31 13F Amgen COM 031162100 2,841 -53 -1.83 639 3.90 0.1365
2021-10-28 2021-09-30 13F Amgen COM 031162100 2,894 -296 -9.28 615 -20.95 0.1408
2021-08-02 2021-06-30 13F Amgen COM 031162100 3,190 0 0.00 778 -2.02 0.1779
2021-04-19 2021-03-31 13F Amgen COM 031162100 3,190 -250 -7.27 794 0.38 0.1962
2021-01-25 2020-12-31 13F Amgen COM 031162100 3,440 428 14.21 791 3.26 0.1972
2020-10-27 2020-09-30 13F Amgen COM 031162100 3,012 292 10.74 766 19.50 0.1653
2020-07-29 2020-06-30 13F Amgen COM 031162100 2,720 5 0.18 641 16.33 0.1433
2020-04-28 2020-03-31 13F Amgen COM 031162100 2,715 3 0.11 551 -15.75 0.1567
2020-02-06 2019-12-31 13F Amgen COM 031162100 2,712 624 29.89 654 61.88 0.1495
2019-11-05 2019-09-30 13F Amgen COM 031162100 2,088 0 0.00 404 4.94 0.1179
2019-08-05 2019-06-30 13F Amgen COM 031162100 2,088 -14 -0.67 385 -3.51 0.1084
2019-05-06 2019-03-31 13F Amgen COM 031162100 2,102 2,102 399 0.1225
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.