Amgen Inc.
MX ˙ BMV ˙ NL0000888691
SecurityMX:AMGN / Amgen Inc.
InstitutionKlingenstein Fields & Co Lp
Latest Disclosed Ownership1,142 shares
Latest Disclosed Value $ 401,813
Klingenstein Fields & Co Lp ownership in AMGN / Amgen Inc.

On May 12, 2026 - Klingenstein Fields & Co Lp filed a 13F-HR form disclosing ownership of 1,142 shares of Amgen Inc. (MX:AMGN) valued at $401,813 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,142 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)
2026-05-12 2026-03-31 13F AMGEN COMMON 031162100 1,142 0 0.00 402 7.51 0.0118
2026-02-13 2025-12-31 13F AMGEN COMMON 031162100 1,142 0 0.00 374 15.84 0.0140
2025-11-14 2025-09-30 13F AMGEN COMMON 031162100 1,142 -57 -4.75 322 -3.59 0.0122
2025-07-30 2025-06-30 13F AMGEN COM 031162100 1,199 0 0.00 335 -10.46 0.0133
2025-04-28 2025-03-31 13F AMGEN COM 031162100 1,199 0 0.00 374 19.55 0.0159
2025-01-30 2024-12-31 13F AMGEN COM 031162100 1,199 0 0.00 313 -19.17 0.0126
2024-10-29 2024-09-30 13F AMGEN COM 031162100 1,199 0 0.00 386 3.21 0.0154
2024-08-01 2024-06-30 13F AMGEN COM 031162100 1,199 -102 -7.84 375 1.36 0.0155
2024-04-29 2024-03-31 13F AMGEN COM 031162100 1,301 0 0.00 370 -1.34 0.0154
2024-02-01 2023-12-31 13F AMGEN COM 031162100 1,301 0 0.00 375 7.16 0.0167
2023-10-27 2023-09-30 13F AMGEN COM 031162100 1,301 111 9.33 350 32.20 0.0171
2023-08-01 2023-06-30 13F AMGEN COM 031162100 1,190 0 0.00 264 -8.01 0.0122
2023-04-28 2023-03-31 13F AMGEN COM 031162100 1,190 88 7.99 288 -0.69 0.0144
2023-02-02 2022-12-31 13F AMGEN COM 031162100 1,102 0 0.00 289 16.53 0.0150
2022-10-28 2022-09-30 13F AMGEN COM 031162100 1,102 -45 -3.92 248 -11.11 0.0136
2022-08-01 2022-06-30 13F AMGEN COM 031162100 1,147 -46 -3.86 279 -3.12 0.0145
2022-04-27 2022-03-31 13F AMGEN COM 031162100 1,193 0 0.00 288 7.46 0.0123
2022-01-31 2021-12-31 13F AMGEN COM 031162100 1,193 0 0.00 268 5.51 0.0108
2021-10-26 2021-09-30 13F AMGEN COM 031162100 1,193 0 0.00 254 -12.71 0.0108
2021-07-26 2021-06-30 13F AMGEN COM 031162100 1,193 -37 -3.01 291 -4.90 0.0120
2021-04-29 2021-03-31 13F AMGEN COM 031162100 1,230 91 7.99 306 16.79 0.0138
2021-02-02 2020-12-31 13F AMGEN COM 031162100 1,139 -200 -14.94 262 -22.94 0.0119
2020-10-30 2020-09-30 13F AMGEN COM 031162100 1,339 -78 -5.50 340 1.80 0.0170
2020-08-03 2020-06-30 13F AMGEN COM 031162100 1,417 1,417 334 0.0182
2018-05-01 2018-03-31 13F Amgen COM 031162100 0 -2,992 -100.00 0 -100.00
2018-01-30 2017-12-31 13F Amgen COM 031162100 2,992 0 0.00 520 -6.81 0.0191
2017-11-01 2017-09-30 13F Amgen COM 031162100 2,992 300 11.14 558 20.26 0.0215
2017-07-27 2017-06-30 13F Amgen COM 031162100 2,692 0 0.00 464 4.98 0.0182
2017-05-01 2017-03-31 13F Amgen COM 031162100 2,692 -11 -0.41 442 11.90 0.0179
2017-01-26 2016-12-31 13F Amgen COM 031162100 2,703 11 0.41 395 -12.03 0.0173
2016-11-02 2016-09-30 13F Amgen COM 031162100 2,692 0 0.00 449 9.51 0.0207
2016-08-01 2016-06-30 13F Amgen COM 031162100 2,692 0 0.00 410 1.49 0.0192
2016-05-02 2016-03-31 13F Amgen COM 031162100 2,692 0 0.00 404 -7.55 0.0202
2016-02-01 2015-12-31 13F Amgen COM 031162100 2,692 0 0.00 437 17.47 0.0217
2015-10-23 2015-09-30 13F Amgen COM 031162100 2,692 0 0.00 372 -9.93 0.0184
2015-08-03 2015-06-30 13F Amgen COM 031162100 2,692 -26,565 -90.80 413 -91.17 0.0184
2015-05-05 2015-03-31 13F Amgen COM 031162100 29,257 29,257 0.00 4,677 0.2071
2015-02-04 2014-12-31 13F Amgen COM 031162100 0 -29,657 -100.00 0 -100.00
2014-10-21 2014-09-30 13F Amgen COM 031162100 29,657 -2,384 -7.44 4,166 9.83 0.1817
2014-07-24 2014-06-30 13F Amgen COM 031162100 32,041 28,520 810.00 3,793 773.96 0.1612
2014-05-02 2014-03-31 13F Amgen COM 031162100 3,521 229 6.96 434 15.43 0.0195
2014-02-05 2013-12-31 13F Amgen COM 031162100 3,292 -250 -7.06 376 -5.05 0.0135
2013-11-04 2013-09-30 13F Amgen COM 031162100 3,542 -500 -12.37 396 -0.75 0.0155
2013-08-08 2013-06-30 13F Amgen COM 031162100 4,042 4,042 399 0.0143
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.