Amgen Inc.
US ˙ NasdaqGS ˙ US0311621009

SecurityAMGN / Amgen Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership351,305 shares
Latest Disclosed Value $ 114,981,314
Sei Investments Co reports 10.72% increase in ownership of AMGN / Amgen Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 351,305 shares of Amgen Inc. (US:AMGN) valued at $114,985,640 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 317,289 shares of Amgen Inc.. This represents a change in shares of 10.72% during the quarter. The current value of the position is $118,818,377 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)
2026-02-13 2025-12-31 13F AMGEN COM 031162100 351,305 34,016 10.72 114,981 28.42 0.1135
2025-11-13 2025-09-30 13F AMGEN COM 031162100 317,289 -4,161 -1.29 89,534 -0.25 0.0963
2025-08-14 2025-06-30 13F AMGEN COM 031162100 321,450 -13,411 -4.00 89,758 -13.96 0.1040
2025-05-14 2025-03-31 13F/A-1 AMGEN COM 031162100 334,861 1,701 0.51 104,320 20.14 0.1343
2025-05-13 2025-03-31 13F AMGEN COM 031162100 337,442 4,282 91,254 0.0992
2025-02-11 2024-12-31 13F AMGEN COM 031162100 333,160 -89,525 -21.18 86,831 -36.24 0.1115
2024-11-12 2024-09-30 13F AMGEN COM 031162100 422,685 42,997 11.32 136,191 14.81 0.1769
2024-08-13 2024-06-30 13F AMGEN COM 031162100 379,688 5,264 1.41 118,627 11.43 0.1681
2024-05-07 2024-03-31 13F AMGEN COM 031162100 374,424 -3,287 -0.87 106,456 -2.14 0.1560
2024-02-14 2023-12-31 13F AMGEN COM 031162100 377,711 51,982 15.96 108,788 24.26 0.1746
2023-11-14 2023-09-30 13F AMGEN COM 031162100 325,729 5,435 1.70 87,547 23.11 0.1573
2023-08-11 2023-06-30 13F AMGEN COM 031162100 320,294 -30,439 -8.68 71,110 -16.13 0.1240
2023-05-12 2023-03-31 13F AMGEN COM 031162100 350,733 9,268 2.71 84,790 -5.46 0.1575
2023-02-10 2022-12-31 13F AMGEN COM 031162100 341,465 11,499 3.48 89,684 20.58 0.1993
2022-11-14 2022-09-30 13F AMGEN COM 031162100 329,966 -3,677 -1.10 74,374 -8.17 0.1659
2022-08-15 2022-06-30 13F AMGEN COM 031162100 333,643 4,224 1.28 80,989 1.84 0.1749
2022-05-13 2022-03-31 13F AMGEN COM 031162100 329,419 -8,989 -2.66 79,526 4.50 0.1598
2022-02-14 2021-12-31 13F AMGEN COM 031162100 338,408 -13,656 -3.88 76,105 1.81 0.1428
2021-11-12 2021-09-30 13F AMGEN COM 031162100 352,064 8,897 2.59 74,755 -10.50 0.1568
2021-08-06 2021-06-30 13F AMGEN COM 031162100 343,167 5,153 1.52 83,523 1.47 0.1852
2021-05-12 2021-03-31 13F AMGEN COM 031162100 338,014 43,998 14.96 82,311 21.74 0.2074
2021-02-08 2020-12-31 13F AMGEN COM 031162100 294,016 20,230 7.39 67,614 -3.11 0.1748
2020-12-04 2020-09-30 13F/A-1 AMGEN COM 031162100 273,786 -37,493 -12.04 69,784 -4.79 0.2021
2020-11-06 2020-09-30 13F AMGEN COM 031162100 284,239 -27,040 72,441 174,421.8216
2020-08-17 2020-06-30 13F/A-1 AMGEN COM 031162100 311,279 -99,002 -24.13 73,292 -11.80 0.2275
2020-08-11 2020-06-30 13F AMGEN COM 031162100 411,151 870 98,490 267,159.3676
2020-05-14 2020-03-31 13F AMGEN COM 031162100 410,281 -12,359 -2.92 83,101 -18.41 0.3052
2020-02-06 2019-12-31 13F AMGEN COM 031162100 422,640 24,460 6.14 101,854 32.11 0.3038
2019-11-12 2019-09-30 13F AMGEN COM 031162100 398,180 117,850 42.04 77,096 49.28 0.1972
2019-08-14 2019-06-30 13F AMGEN COM 031162100 280,330 -41,172 -12.81 51,644 -15.42 0.1687
2019-05-15 2019-03-31 13F AMGEN COM 031162100 321,502 26,198 8.87 61,060 1.44 0.2051
2019-02-13 2018-12-31 13F AMGEN COM 031162100 295,304 61,242 26.16 60,196 24.08 0.2143
2018-11-08 2018-09-30 13F AMGEN COM 031162100 234,062 -15,160 -6.08 48,513 5.45 0.1758
2018-08-03 2018-06-30 13F AMGEN COM 031162100 249,222 171,260 219.67 46,004 246.13 0.1564
2018-05-11 2018-03-31 13F AMGEN COM 031162100 77,962 -244,673 -75.84 13,291 -74.36 0.0509
2018-02-08 2017-12-31 13F AMGEN COM 031162100 322,635 8,111 2.58 51,832 -11.58 0.1800
2017-11-06 2017-09-30 13F AMGEN COM 031162100 314,524 -45,687 -12.68 58,619 -5.51 0.2084
2017-07-31 2017-06-30 13F AMGEN COM 031162100 360,211 -19,434 -5.12 62,039 -0.40 0.2473
2017-05-05 2017-03-31 13F AMGEN COM 031162100 379,645 12,446 3.39 62,288 16.73 0.2730
2017-02-02 2016-12-31 13F AMGEN COM 031162100 367,199 -76,040 -17.16 53,361 -27.83 0.2584
2016-11-04 2016-09-30 13F AMGEN COM 031162100 443,239 298,798 206.87 73,936 236.42 0.3756
2016-08-11 2016-06-30 13F AMGEN COM 031162100 144,441 -2,863 -1.94 21,977 -0.49 0.1318
2016-05-10 2016-03-31 13F/A-1 AMGEN COM 031162100 147,304 22,469 18.00 22,086 8.99 0.1374
2016-02-03 2015-12-31 13F AMGEN COM 031162100 124,835 47,514 61.45 20,264 89.47 0.1235
2015-11-02 2015-09-30 13F/A-1 AMGEN COM 031162100 77,321 -13,700 -15.05 10,695 -23.47 0.0982
2015-10-30 2015-09-30 13F AMGEN COM 031162100 77,321 10,696
2015-08-07 2015-06-30 13F/A-1 AMGEN COM 031162100 91,021 -111,111 -54.97 13,974 -56.75 0.1263
2015-08-04 2015-06-30 13F AMGEN COM 031162100 91,021 -111,111 13,974 0.1263
2015-05-14 2015-03-31 13F/A-1 AMGEN COM 031162100 202,132 32,441 19.12 32,312 19.54 0.2806
2015-05-01 2015-03-31 13F AMGEN COM 031162100 202,132 32,312
2015-02-10 2014-12-31 13F AMGEN COM 031162100 169,691 169,691 27,030 0.2389
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.