Amgen Inc.
CH ˙ SWX ˙ NL0000888691
SecurityCH:AMGN / Amgen Inc.
InstitutionProsperity Consulting Group, LLC
Latest Disclosed Ownership1,839 shares
Latest Disclosed Value $ 647,052
Prosperity Consulting Group, LLC reports 3.14% increase in ownership of AMGN / Amgen Inc.

On May 5, 2026 - Prosperity Consulting Group, LLC filed a 13F-HR form disclosing ownership of 1,839 shares of Amgen Inc. (CH:AMGN) valued at $647,052 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,783 shares of Amgen Inc.. This represents a change in shares of 3.14% 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)
2026-05-05 2026-03-31 13F AMGEN COM 031162100 1,839 56 3.14 647 10.98 0.0288
2026-02-17 2025-12-31 13F AMGEN COM 031162100 1,783 -485 -21.38 584 -8.91 0.0262
2025-11-14 2025-09-30 13F AMGEN COM 031162100 2,268 75 3.42 640 4.58 0.0315
2025-08-05 2025-06-30 13F AMGEN COM 031162100 2,193 -3,052 -58.19 612 -62.55 0.0447
2025-05-07 2025-03-31 13F AMGEN COM 031162100 5,245 47 0.90 1,634 20.68 0.1263
2025-02-14 2024-12-31 13F AMGEN COM 031162100 5,198 131 2.59 1,355 -17.03 0.1020
2024-10-15 2024-09-30 13F AMGEN COM 031162100 5,067 -839 -14.21 1,633 -11.54 0.1274
2024-08-08 2024-06-30 13F AMGEN COM 031162100 5,906 -106 -1.76 1,845 7.96 0.2502
2024-05-01 2024-03-31 13F AMGEN COM 031162100 6,012 135 2.30 1,709 1.00 0.2143
2024-02-13 2023-12-31 13F AMGEN COM 031162100 5,877 213 3.76 1,693 11.17 0.5671
2023-11-14 2023-09-30 13F AMGEN COM 031162100 5,664 5,664 1,522 0.6996
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.