Amgen Inc.
MX ˙ BMV ˙ NL0000888691
SecurityMX:AMGN / Amgen Inc.
InstitutionAdvisor OS, LLC
Latest Disclosed Ownership3,140 shares
Latest Disclosed Value $ 1,104,829
Advisor OS, LLC reports 35.83% decrease in ownership of AMGN / Amgen Inc.

On May 7, 2026 - Advisor OS, LLC filed a 13F-HR form disclosing ownership of 3,140 shares of Amgen Inc. (MX:AMGN) valued at $1,104,829 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 4,893 shares of Amgen Inc.. This represents a change in shares of -35.83% 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)
2026-05-07 2026-03-31 13F AMGEN COM 031162100 3,140 -1,753 -35.83 1,105 -31.04 0.0311
2026-02-04 2025-12-31 13F AMGEN COM 031162100 4,893 -347 -6.62 1,601 8.32 0.0473
2025-11-12 2025-09-30 13F AMGEN COM 031162100 5,240 -100 -1.87 1,479 -0.81 0.1276
2025-08-14 2025-06-30 13F AMGEN COM 031162100 5,340 322 6.42 1,491 -4.67 0.1467
2025-05-06 2025-03-31 13F AMGEN COM 031162100 5,018 1,021 25.54 1,563 50.14 0.1779
2025-02-05 2024-12-31 13F AMGEN COM 031162100 3,997 1,031 34.76 1,042 9.01 0.1206
2024-11-04 2024-09-30 13F AMGEN COM 031162100 2,966 234 8.57 956 11.96 0.0951
2024-08-05 2024-06-30 13F AMGEN COM 031162100 2,732 -350 -11.36 853 -2.63 0.0935
2024-05-09 2024-03-31 13F AMGEN COM 031162100 3,082 1,068 53.03 876 51.03 0.1007
2024-02-08 2023-12-31 13F AMGEN COM 031162100 2,014 780 63.21 580 75.23 0.0755
2023-11-03 2023-09-30 13F AMGEN COM 031162100 1,234 193 18.54 332 43.29 0.0497
2023-08-08 2023-06-30 13F AMGEN COM 031162100 1,041 1,041 231 0.0378
2021-02-10 2020-12-31 13F AMGEN COM 031162100 0 -1,238 -100.00 0 -100.00
2020-11-12 2020-09-30 13F AMGEN COM 031162100 1,238 -939 -43.13 315 -38.60 0.1322
2020-08-28 2020-06-30 13F AMGEN COM 031162100 2,177 2,177 513 0.3059
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.