Amgen Inc.
CH ˙ SWX ˙ NL0000888691
SecurityCH:AMGN / Amgen Inc.
InstitutionAtlantic Trust, LLC
Latest Disclosed Ownership305 shares
Latest Disclosed Value $ 107,315
Atlantic Trust, LLC reports 18.67% decrease in ownership of AMGN / Amgen Inc.

On May 6, 2026 - Atlantic Trust, LLC filed a 13F-HR form disclosing ownership of 305 shares of Amgen Inc. (CH:AMGN) valued at $107,315 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 375 shares of Amgen Inc.. This represents a change in shares of -18.67% 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)
2026-05-06 2026-03-31 13F AMGEN COM 031162100 305 -70 -18.67 107 -12.30 0.0175
2026-02-09 2025-12-31 13F AMGEN COM 031162100 375 -177 -32.07 123 -21.29 0.0193
2025-11-10 2025-09-30 13F AMGEN COM 031162100 552 -31 -5.32 156 -4.32 0.0266
2025-08-08 2025-06-30 13F AMGEN COM 031162100 583 313 115.93 163 92.86 0.0308
2025-05-09 2025-03-31 13F AMGEN COM 031162100 270 -824 -75.32 84 -70.53 0.0187
2025-02-10 2024-12-31 13F AMGEN COM 031162100 1,094 130 13.49 285 -8.06 0.0616
2024-11-13 2024-09-30 13F AMGEN COM 031162100 964 -1 -0.10 311 2.99 0.0744
2024-08-09 2024-06-30 13F AMGEN COM 031162100 965 -275 -22.18 302 -14.49 0.0750
2024-05-10 2024-03-31 13F AMGEN COM 031162100 1,240 0 0.00 353 -1.40 0.0922
2024-02-06 2023-12-31 13F AMGEN COM 031162100 1,240 700 129.63 357 146.21 0.0977
2023-11-13 2023-09-30 13F AMGEN COM 031162100 540 0 0.00 145 16.00 0.0477
2023-08-08 2023-06-30 13F AMGEN COM 031162100 540 0 0.00 125 -3.85 0.0402
2023-05-10 2023-03-31 13F Amgen COM 031162100 540 -14 -2.53 131 0.0417
2023-02-01 2022-12-31 13F AMGEN COM 031162100 554 0 0.00 0 -100.00 0.0487
2022-11-14 2022-09-30 13F AMGEN COM 031162100 554 284 105.19 125 89.39 0.0435
2022-08-11 2022-06-30 13F Amgen COM 031162100 270 0 0.00 66 1.54 0.0502
2022-05-16 2022-03-31 13F Amgen COM 031162100 270 0 0.00 65 6.56 0.0421
2022-02-09 2021-12-31 13F Amgen Com 031162100 270 0 0.00 61 7.02 0.0360
2021-11-02 2021-09-30 13F Amgen Com 031162100 270 0 0.00 57 -13.64 0.0361
2021-08-12 2021-06-30 13F Amgen Com 031162100 270 270 66 0.0431
2021-04-30 2021-03-31 13F Amgen Com 031162100 0 -289 -100.00 0 -100.00
2021-02-16 2020-12-31 13F Amgen Com 031162100 289 0 0.00 66 -9.59 0.0392
2020-10-23 2020-09-30 13F Amgen Com 031162100 289 19 7.04 73 14.06 0.0580
2020-08-17 2020-06-30 13F Amgen Com 031162100 270 0 0.00 64 16.36 0.0539
2020-05-12 2020-03-31 13F Amgen Com 031162100 270 0 0.00 55 -15.38 0.0497
2020-02-03 2019-12-31 13F Amgen Com 031162100 270 0 0.00 65 25.00 0.0476
2019-11-07 2019-09-30 13F Amgen Com 031162100 270 0 0.00 52 4.00 0.0405
2019-07-31 2019-06-30 13F Amgen Com 031162100 270 0 0.00 50 -3.85 0.0399
2019-05-13 2019-03-31 13F Amgen Com 031162100 270 0 0.00 52 -1.89 0.0434
2019-02-13 2018-12-31 13F/A-1 Amgen Com 031162100 270 0 0.00 53 -5.36 0.0493
2019-02-13 2018-12-31 13F Amgen Com 031162100 270 53
2018-11-15 2018-09-30 13F Amgen COM 031162100 270 0 0.00 56 12.00 0.0430
2018-08-20 2018-06-30 13F Amgen Com 031162100 270 270 0.00 50 -10.71 0.0447
2018-05-15 2018-03-31 13F Amgen Com 031162100 0 -850 -100.00 0 -100.00
2018-02-14 2017-12-31 13F Amgen Com 031162100 850 0 0.00 148 -6.33 0.1012
2017-11-17 2017-09-30 13F Amgen Com 031162100 850 0 0.00 158 8.22 0.1175
2017-08-21 2017-06-30 13F Amgen Com 031162100 850 850 146 0.1152
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.