Amgen Inc.
US ˙ NasdaqGS ˙ US0311621009

SecurityAMGN / Amgen Inc.
InstitutionPrincipal Street Partners, LLC
Latest Disclosed Ownership20,496 shares
Latest Disclosed Value $ 7,211,565
Principal Street Partners, LLC reports 1.19% decrease in ownership of AMGN / Amgen Inc.

On May 15, 2026 - Principal Street Partners, LLC filed a 13F-HR form disclosing ownership of 20,496 shares of Amgen Inc. (US:AMGN) valued at $7,211,518 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 20,742 shares of Amgen Inc.. This represents a change in shares of -1.19% during the quarter. The current value of the position is $6,932,157 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)
2026-05-15 2026-03-31 13F AMGEN Common stock 031162100 20,496 -246 -1.19 7,212 6.22 1.1771
2026-02-17 2025-12-31 13F AMGEN Common stock 031162100 20,742 -501 -2.36 6,789 13.26 1.1452
2025-11-14 2025-09-30 13F AMGEN Common stock 031162100 21,243 -1,904 -8.23 5,995 -7.24 0.9568
2025-08-14 2025-06-30 13F AMGEN Common stock 031162100 23,147 2,349 11.29 6,463 -0.26 0.6337
2025-05-15 2025-03-31 13F AMGEN Common stock 031162100 20,798 1,363 7.01 6,480 27.92 1.2051
2025-02-18 2024-12-31 13F AMGEN Common stock 031162100 19,435 340 1.78 5,065 -17.59 0.9961
2024-11-13 2024-09-30 13F AMGEN Common stock 031162100 19,095 -5,353 -21.90 6,147 -19.54 1.0051
2024-08-14 2024-06-30 13F AMGEN Common stock 031162100 24,448 1,437 6.24 7,639 14.05 1.3682
2024-05-15 2024-03-31 13F AMGEN Common stock 031162100 23,011 5,387 30.57 6,699 31.95 1.2662
2024-02-07 2023-12-31 13F AMGEN Common stock 031162100 17,624 -3,577 -16.87 5,076 -10.92 1.2246
2023-11-01 2023-09-30 13F AMGEN Common stock 031162100 21,201 896 4.41 5,698 26.40 1.1289
2023-08-21 2023-06-30 13F/A-1 AMGEN Common stock 031162100 20,305 -791 -3.75 4,508 -11.59 1.0715
2023-08-15 2023-06-30 13F AMGEN Common stock 031162100 21,096 0 5,100 1.2889
2023-05-11 2023-03-31 13F AMGEN Common stock 031162100 21,096 -80 -0.38 5,100 -8.31 1.2889
2023-02-15 2022-12-31 13F AMGEN Common stock 031162100 21,176 -261 -1.22 5,562 15.09 1.4013
2022-11-14 2022-09-30 13F AMGEN Common stock 031162100 21,437 -3,504 -14.05 4,832 -20.37 1.2878
2022-08-15 2022-06-30 13F AMGEN Common stock 031162100 24,941 -304 -1.20 6,068 -0.59 1.5719
2022-05-05 2022-03-31 13F Amgen Common stock 031162100 25,245 5,272 26.40 6,104 35.86 1.3995
2022-02-07 2021-12-31 13F Amgen Common stock 031162100 19,973 -1,379 -6.46 4,493 -1.04 1.0815
2021-11-10 2021-09-30 13F Amgen Common stock 031162100 21,352 2,336 12.28 4,540 -2.05 1.2368
2021-08-10 2021-06-30 13F Amgen Common stock 031162100 19,016 -34,423 -64.42 4,635 -65.14 1.2228
2021-05-13 2021-03-31 13F Amgen Common stock 031162100 53,439 36,200 209.99 13,296 235.50 1.7158
2021-02-16 2020-12-31 13F Amgen Common stock 031162100 17,239 -1,196 -6.49 3,963 -15.41 1.2137
2020-11-12 2020-09-30 13F Amgen Common stock 031162100 18,435 -1,739 -8.62 4,685 -1.53 1.6460
2020-08-14 2020-06-30 13F Amgen Common stock 031162100 20,174 -8,973 -30.79 4,758 -19.48 1.7774
2020-05-14 2020-03-31 13F Amgen Common stock 031162100 29,147 27,775 2,024.42 5,909 1,685.20 2.4802
2020-03-04 2019-12-31 13F Amgen Common stock 031162100 1,372 16 1.18 331 26.34 0.0738
2019-11-14 2019-09-30 13F AMGEN INC COM Common stock 031162100 1,356 1,356 262 0.0656
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.