Amgen Inc.
US ˙ NasdaqGS ˙ US0311621009

SecurityAMGN / Amgen Inc.
InstitutionProstatis Group LLC
Latest Disclosed Ownership1,707 shares
Latest Disclosed Value $ 600,500
Prostatis Group LLC reports 4.98% increase in ownership of AMGN / Amgen Inc.

On May 12, 2026 - Prostatis Group LLC filed a 13F-HR form disclosing ownership of 1,707 shares of Amgen Inc. (US:AMGN) valued at $600,608 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,626 shares of Amgen Inc.. This represents a change in shares of 4.98% during the quarter. The current value of the position is $577,342 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)
2026-05-12 2026-03-31 13F AMGEN COM 031162100 1,707 81 4.98 600 12.78 0.1537
2026-02-17 2025-12-31 13F AMGEN COM 031162100 1,626 -34 -2.05 532 13.68 0.1271
2025-11-04 2025-09-30 13F AMGEN COM 031162100 1,660 -64 -3.71 469 -2.70 0.1174
2025-07-25 2025-06-30 13F AMGEN COM 031162100 1,724 -141 -7.56 481 -17.21 0.1378
2025-05-16 2025-03-31 13F AMGEN COM 031162100 1,865 -456 -19.65 581 -3.81 0.1833
2025-03-21 2024-12-31 13F AMGEN COM 031162100 2,321 -77 -3.21 605 -21.76 0.1763
2025-03-21 2024-09-30 13F AMGEN COM 031162100 2,398 222 10.20 773 13.53 0.2528
2025-03-21 2024-06-30 13F AMGEN COM 031162100 2,176 332 18.00 680 29.77 0.2385
2025-03-21 2024-03-31 13F AMGEN COM 031162100 1,844 527 40.02 524 38.26 0.1988
2025-03-21 2023-12-31 13F AMGEN COM 031162100 1,317 -26 -1.94 379 5.28 0.1585
2025-03-21 2023-09-30 13F AMGEN COM 031162100 1,343 -53,633 -97.56 361 11.80 0.1764
2023-08-14 2023-06-30 13F AMGEN COM 031162100 54,976 49,215 854.28 323 -76.70 0.1502
2023-05-22 2023-03-31 13F AMGEN COM 031162100 5,761 -370 -6.03 1,383 -14.16 0.7300
2023-03-28 2022-12-31 13F/A-1 AMGEN COM 031162100 6,131 331 5.71 1,610 23.18 0.9826
2023-03-23 2022-12-31 13F AMGEN COM 031162100 1,202,895 174,508 1,610 0.9392
2023-03-28 2022-09-30 13F/A-1 AMGEN COM 031162100 5,800 4,596 381.73 1,307 347.60 1.5067
2023-03-23 2022-09-30 13F AMGEN COM 031162100 1,028,387 1,019,914 1,307 1.3758
2023-03-28 2022-06-30 13F/A-1 AMGEN COM 031162100 1,204 39 3.35 293 3.91 0.4564
2023-03-23 2022-06-30 13F AMGEN COM 031162100 8,473 7,308 293 0.4036
2023-03-28 2022-03-31 13F/A-1 AMGEN COM 031162100 1,165 10 0.87 282 8.49 0.2258
2023-03-23 2022-03-31 13F AMGEN COM 031162100 1,165 10 282 0.2046
2023-03-28 2021-12-31 13F/A-1 AMGEN COM 031162100 1,155 9 0.79 260 6.58 0.1594
2023-03-23 2021-12-31 13F AMGEN COM 031162100 1,155 9 260 0.1548
2023-03-28 2021-09-30 13F/A-1 AMGEN COM 031162100 1,146 -41 -3.45 244 -15.92 0.1457
2023-03-23 2021-09-30 13F AMGEN COM 031162100 1,146 -41 244 0.1419
2023-03-28 2021-06-30 13F/A-1 AMGEN COM 031162100 1,187 -233 -16.41 289 -18.13 0.1977
2023-03-23 2021-06-30 13F AMGEN COM 031162100 1,187 -233 289 0.1918
2023-03-28 2021-03-31 13F/A-1 AMGEN COM 031162100 1,420 33 2.38 353 11.01 0.2771
2023-03-23 2021-03-31 13F AMGEN COM 031162100 1,420 33 353 0.2704
2023-03-28 2020-12-31 13F/A-1 AMGEN COM 031162100 1,387 136 10.87 319 0.00 0.2671
2023-03-23 2020-12-31 13F AMGEN COM 031162100 1,387 136 319 0.2574
2023-03-28 2020-09-30 13F/A-1 AMGEN COM 031162100 1,251 66 5.57 318 13.98 0.3014
2023-03-23 2020-09-30 13F AMGEN COM 031162100 1,251 66 318 0.2863
2023-03-28 2020-06-30 13F/A-1 AMGEN COM 031162100 1,185 12 1.02 279 17.72 0.5616
2023-03-23 2020-06-30 13F AMGEN COM 031162100 1,185 12 279 0.5151
2023-03-28 2020-03-31 13F/A-1 AMGEN COM 031162100 1,173 -47 -3.85 238 -19.39 0.3379
2023-03-23 2020-03-31 13F AMGEN COM 031162100 1,173 -12,068 238 0.3125
2023-03-28 2019-12-31 13F/A-1 AMGEN COM 031162100 1,220 1,220 294 0.2659
2023-03-23 2019-12-31 13F AMGEN COM 031162100 13,241 13,241 298 0.2559
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.