Amgen Inc.
CH ˙ SWX ˙ NL0000888691
SecurityCH:AMGN / Amgen Inc.
InstitutionKidder Stephen W
Latest Disclosed Ownership595 shares
Latest Disclosed Value $ 209,350
Kidder Stephen W ownership in AMGN / Amgen Inc.

On May 8, 2026 - Kidder Stephen W filed a 13F-HR form disclosing ownership of 595 shares of Amgen Inc. (CH:AMGN) valued at $209,350 USD as of March 31, 2026. The entity filed a previous 13F-HR on May 14, 2024 disclosing 0 shares of Amgen Inc..

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)
2026-05-08 2026-03-31 13F AMGEN COM 031162100 595 595 209 0.0132
2024-05-14 2024-03-31 13F AMGEN COM 031162100 0 -710 -100.00 0 -100.00
2024-02-14 2023-12-31 13F AMGEN COM 031162100 710 -55 -7.19 204 -0.49 0.0659
2023-11-14 2023-09-30 13F AMGEN COM 031162100 765 765 206 0.0713
2023-08-11 2023-06-30 13F AMGEN COM 031162100 0 -910 -100.00 0 -100.00
2023-05-11 2023-03-31 13F AMGEN COM 031162100 910 -25 -2.67 220 -10.61 0.0766
2023-02-09 2022-12-31 13F AMGEN COM 031162100 935 0 0.00 246 16.11 0.0899
2022-11-08 2022-09-30 13F AMGEN COM 031162100 935 -90 -8.78 211 -15.26 0.0861
2022-07-19 2022-06-30 13F AMGEN COM 031162100 1,025 0 0.00 249 0.81 0.0964
2022-05-17 2022-03-31 13F AMGEN COM 031162100 1,025 0 0.00 247 6.93 0.0798
2022-02-08 2021-12-31 13F AMGEN COM 031162100 1,025 -100 -8.89 231 -3.35 0.0702
2021-11-10 2021-09-30 13F AMGEN COM 031162100 1,125 -75 -6.25 239 -18.15 0.0750
2021-08-09 2021-06-30 13F AMGEN COM 031162100 1,200 0 0.00 292 -2.34 0.0901
2021-05-17 2021-03-31 13F AMGEN COM 031162100 1,200 -25 -2.04 299 6.41 0.0965
2021-02-16 2020-12-31 13F AMGEN COM 031162100 1,225 -5 -0.41 281 -9.94 0.0935
2020-10-28 2020-09-30 13F AMGEN COM 031162100 1,230 -10 -0.81 312 6.48 0.1107
2020-07-28 2020-06-30 13F AMGEN COM 031162100 1,240 -25 -1.98 293 14.01 0.1117
2020-05-07 2020-03-31 13F AMGEN COM 031162100 1,265 -60 -4.53 257 -19.44 0.1167
2020-01-15 2019-12-31 13F AMGEN COM 031162100 1,325 -185 -12.25 319 9.25 0.1174
2019-11-07 2019-09-30 13F AMGEN COM 031162100 1,510 -55 -3.51 292 1.04 0.1150
2019-07-24 2019-06-30 13F AMGEN COM 031162100 1,565 -50 -3.10 289 -5.86 0.1158
2019-05-01 2019-03-31 13F AMGEN COM 031162100 1,615 -70 -4.15 307 -6.40 0.1247
2019-01-24 2018-12-31 13F AMGEN COM 031162100 1,685 -115 -6.39 328 -12.06 0.1446
2018-10-15 2018-09-30 13F AMGEN COM 031162100 1,800 -125 -6.49 373 5.07 0.1362
2018-07-30 2018-06-30 13F AMGEN COM 031162100 1,925 -100 -4.94 355 2.90 0.1362
2018-04-24 2018-03-31 13F AMGEN COM 031162100 2,025 -540 -21.05 345 -22.65 0.1317
2018-02-02 2017-12-31 13F AMGEN COM 031162100 2,565 -25 -0.97 446 -7.66 0.1599
2017-10-26 2017-09-30 13F AMGEN COM 031162100 2,590 0 0.00 483 8.30 0.1780
2017-07-26 2017-06-30 13F AMGEN COM 031162100 2,590 75 2.98 446 7.99 0.1690
2017-05-15 2017-03-31 13F AMGEN COM 031162100 2,515 2,515 413 0.1589
2017-02-14 2016-12-31 13F AMGEN Common Stock 031162100 0 -1,418 -100.00 0 -100.00
2016-11-15 2016-09-30 13F AMGEN Common Stock 031162100 1,418 0 0.00 236 9.26 0.0938
2016-08-08 2016-06-30 13F AMGEN Common Stock 031162100 1,418 0 0.00 216 1.89 0.0860
2016-05-27 2016-03-31 13F AMGEN Common Stock 031162100 1,418 0 0.00 212 -7.83 0.0860
2016-02-12 2015-12-31 13F AMGEN Common Stock 031162100 1,418 1,418 0.00 230 0.0983
2015-08-10 2015-06-30 13F AMGEN Common Stock 031162100 0 -2,186 -100.00 0 -100.00
2015-05-22 2015-03-31 13F AMGEN Common Stock 031162100 2,186 0 0.00 350 0.57 0.1514
2015-02-13 2014-12-31 13F AMGEN Common Stock 031162100 2,186 0 0.00 348 13.73 0.1509
2014-11-24 2014-09-30 13F AMGEN Common Stock 031162100 2,186 2,186 306 0.1391
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.