Amgen Inc.
MX ˙ BMV ˙ NL0000888691
SecurityMX:AMGN / Amgen Inc.
InstitutionRosenberg Matthew Hamilton
Latest Disclosed Ownership1,316 shares
Latest Disclosed Value $ 463,035
Rosenberg Matthew Hamilton reports 0.38% decrease in ownership of AMGN / Amgen Inc.

On April 6, 2026 - Rosenberg Matthew Hamilton filed a 13F-HR form disclosing ownership of 1,316 shares of Amgen Inc. (MX:AMGN) valued at $463,035 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 5, 2026 disclosing 1,321 shares of Amgen Inc.. This represents a change in shares of -0.38% 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)
2026-04-06 2026-03-31 13F AMGEN INC COM Stock 031162100 1,316 -5 -0.38 463 7.18 0.0949
2026-01-05 2025-12-31 13F AMGEN INC COM Stock 031162100 1,321 73 5.85 432 22.73 0.0896
2025-11-10 2025-09-30 13F AMGEN INC COM Stock 031162100 1,248 -5 -0.40 352 0.86 0.0761
2025-07-28 2025-06-30 13F AMGEN INC COM Stock 031162100 1,253 264 26.69 350 13.31 0.0814
2025-04-28 2025-03-31 13F AMGEN INC COM Stock 031162100 989 173 21.20 308 45.28 0.0773
2025-01-14 2024-12-31 13F AMGEN INC COM Stock 031162100 816 -96 -10.53 213 -27.65 0.0553
2024-10-28 2024-09-30 13F AMGEN INC COM Stock 031162100 912 0 0.00 294 3.53 0.0769
2024-07-26 2024-06-30 13F AMGEN INC COM Stock 031162100 912 57 6.67 284 17.43 0.0838
2024-04-22 2024-03-31 13F AMGEN INC COM Stock 031162100 855 24 2.89 242 0.84 0.0699
2024-01-16 2023-12-31 13F AMGEN INC COM Stock 031162100 831 37 4.66 239 12.21 0.0736
2023-10-11 2023-09-30 13F AMGEN INC COM Stock 031162100 794 -80 -9.15 213 9.79 0.0711
2023-07-26 2023-06-30 13F AMGEN INC COM Stock 031162100 874 -161 -15.56 194 -22.40 0.0656
2023-04-17 2023-03-31 13F AMGEN INC COM Stock 031162100 1,035 21 2.07 250 -6.02 0.0807
2023-01-19 2022-12-31 13F AMGEN INC COM Stock 031162100 1,014 68 7.19 266 24.88 0.0902
2022-10-21 2022-09-30 13F AMGEN INC COM Stock 031162100 946 35 3.84 213 -4.91 0.0824
2022-07-15 2022-06-30 13F AMGEN INC COM Stock 031162100 911 0 0.00 224 1.82 0.0845
2022-04-14 2022-03-31 13F AMGEN INC COM Stock 031162100 911 0 0.00 220 7.32 0.0769
2022-01-20 2021-12-31 13F AMGEN COM 031162100 911 255 38.87 205 47.48 0.0730
2021-10-12 2021-09-30 13F AMGEN COM 031162100 656 100 17.99 139 2.21 0.0549
2021-07-26 2021-06-30 13F AMGEN COM 031162100 556 0 0.00 136 -1.45 0.0708
2021-04-30 2021-03-31 13F AMGEN COM 031162100 556 0 0.00 138 7.81 0.0787
2021-02-03 2020-12-31 13F AMGEN COM 031162100 556 50 9.88 128 -0.78 0.0799
2020-10-16 2020-09-30 13F AMGEN COM 031162100 506 0 0.00 129 8.40 0.0948
2020-08-04 2020-06-30 13F AMGEN COM 031162100 506 65 14.74 119 32.22 0.0948
2020-05-14 2020-03-31 13F AMGEN COM 031162100 441 441 90 0.0895
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.