Amgen Inc.
MX ˙ BMV ˙ NL0000888691
SecurityMX:AMGN / Amgen Inc.
InstitutionParthenon Llc
Latest Disclosed Ownership1,177 shares
Latest Disclosed Value $ 414,127
Parthenon Llc ownership in AMGN / Amgen Inc.

On April 28, 2026 - Parthenon Llc filed a 13F-HR form disclosing ownership of 1,177 shares of Amgen Inc. (MX:AMGN) valued at $414,127 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 1,177 shares of Amgen Inc.. This represents a change in shares of 0.00% 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)
2026-04-28 2026-03-31 13F AMGEN COM 031162100 1,177 0 0.00 414 7.53 0.0473
2026-01-23 2025-12-31 13F AMGEN COM 031162100 1,177 0 0.00 385 15.96 0.0416
2025-10-31 2025-09-30 13F AMGEN COM 031162100 1,177 0 0.00 332 1.22 0.0368
2025-07-29 2025-06-30 13F AMGEN COM 031162100 1,177 0 0.00 329 -10.38 0.0376
2025-05-02 2025-03-31 13F AMGEN COM 031162100 1,177 0 0.00 367 19.61 0.0451
2025-02-03 2024-12-31 13F AMGEN COM 031162100 1,177 0 0.00 307 -19.26 0.0371
2024-11-05 2024-09-30 13F AMGEN COM 031162100 1,177 0 0.00 379 3.27 0.0453
2024-08-08 2024-06-30 13F AMGEN COM 031162100 1,177 0 0.00 368 9.88 0.0467
2024-04-30 2024-03-31 13F AMGEN COM 031162100 1,177 0 0.00 335 -1.47 0.0424
2024-02-05 2023-12-31 13F AMGEN COM 031162100 1,177 -50 -4.07 339 3.04 0.0469
2023-10-30 2023-09-30 13F AMGEN COM 031162100 1,227 0 0.00 330 20.96 0.0495
2023-07-27 2023-06-30 13F AMGEN COM 031162100 1,227 50 4.25 272 -4.23 0.0394
2023-05-08 2023-03-31 13F AMGEN COM 031162100 1,177 0 0.00 285 -8.09 0.0435
2023-02-08 2022-12-31 13F AMGEN COM 031162100 1,177 0 0.00 309 16.60 0.0507
2022-11-01 2022-09-30 13F AMGEN COM 031162100 1,177 0 0.00 265 -7.34 0.0478
2022-07-29 2022-06-30 13F AMGEN COM 031162100 1,177 0 0.00 286 0.35 0.0485
2022-05-09 2022-03-31 13F AMGEN COM 031162100 1,177 0 0.00 285 7.55 0.0413
2022-02-07 2021-12-31 13F AMGEN COM 031162100 1,177 0 0.00 265 6.00 0.0372
2021-10-28 2021-09-30 13F AMGEN COM 031162100 1,177 -224 -15.99 250 -26.69 0.0376
2021-07-28 2021-06-30 13F AMGEN COM 031162100 1,401 224 19.03 341 16.38 0.0511
2021-04-23 2021-03-31 13F AMGEN COM 031162100 1,177 -35 -2.89 293 5.02 0.0471
2021-02-03 2020-12-31 13F AMGEN COM 031162100 1,212 -1,302 -51.79 279 -56.34 0.0481
2020-10-29 2020-09-30 13F AMGEN COM 031162100 2,514 1,250 98.89 639 114.43 0.1240
2020-07-24 2020-06-30 13F AMGEN COM 031162100 1,264 0 0.00 298 16.41 0.0619
2020-04-28 2020-03-31 13F AMGEN COM 031162100 1,264 -59 -4.46 256 -19.75 0.0609
2020-01-28 2019-12-31 13F AMGEN COM 031162100 1,323 0 0.00 319 24.61 0.0637
2019-10-31 2019-09-30 13F AMGEN COM 031162100 1,323 -40 -2.93 256 1.99 0.0548
2019-07-29 2019-06-30 13F AMGEN COM 031162100 1,363 0 0.00 251 -3.09 0.0538
2019-05-03 2019-03-31 13F AMGEN COM 031162100 1,363 -6 -0.44 259 -3.00 0.0579
2019-01-29 2018-12-31 13F AMGEN COM 031162100 1,369 65 4.98 267 -1.11 0.0657
2018-11-14 2018-09-30 13F AMGEN COM 031162100 1,304 -80 -5.78 270 5.88 0.0593
2018-08-02 2018-06-30 13F AMGEN COM 031162100 1,384 0 0.00 255 8.05 0.0588
2018-05-03 2018-03-31 13F AMGEN COM 031162100 1,384 -180 -11.51 236 -13.24 0.0556
2018-02-05 2017-12-31 13F AMGEN COM 031162100 1,564 -588 -27.32 272 -32.17 0.0613
2017-10-31 2017-09-30 13F AMGEN COM 031162100 2,152 -75 -3.37 401 4.43 0.0947
2017-07-21 2017-06-30 13F AMGEN COM 031162100 2,227 0 0.00 384 5.21 0.0913
2017-05-05 2017-03-31 13F AMGEN COM 031162100 2,227 0 0.00 365 11.96 0.0866
2017-02-01 2016-12-31 13F AMGEN COM 031162100 2,227 80 3.73 326 -8.94 0.0801
2016-11-07 2016-09-30 13F AMGEN COM 031162100 2,147 0 0.00 358 9.48 0.0889
2016-07-26 2016-06-30 13F AMGEN COM 031162100 2,147 0 0.00 327 1.55 0.0821
2016-05-16 2016-03-31 13F AMGEN COM 031162100 2,147 0 0.00 322 -7.74 0.0827
2016-02-03 2015-12-31 13F AMGEN COM 031162100 2,147 0 0.00 349 17.51 0.0912
2015-10-29 2015-09-30 13F AMGEN COM 031162100 2,147 0 0.00 297 -10.00 0.0829
2015-07-24 2015-06-30 13F AMGEN COM 031162100 2,147 -30 -1.38 330 -5.17 0.0871
2015-04-28 2015-03-31 13F AMGEN COM 031162100 2,177 262 13.68 348 14.10 0.0924
2015-02-17 2014-12-31 13F AMGEN COM 031162100 1,915 50 2.68 305 16.41 0.0841
2014-10-23 2014-09-30 13F AMGEN COM 031162100 1,865 0 0.00 262 18.55 0.0757
2014-07-28 2014-06-30 13F AMGEN COM 031162100 1,865 0 0.00 221 -3.91 0.0653
2014-04-18 2014-03-31 13F AMGEN COM 031162100 1,865 0 0.00 230 7.98 0.0692
2014-02-21 2013-12-31 13F AMGEN COM 031162100 1,865 0 0.00 213 1.91 0.0650
2013-10-17 2013-09-30 13F AMGEN COM 031162100 1,865 1,865 209 0.0692
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.