Amgen Inc.
CH ˙ SWX ˙ NL0000888691
SecurityCH:AMGN / Amgen Inc.
InstitutionBoston Private Wealth Llc
Latest Disclosed Ownership4,959 shares
Latest Disclosed Value $ 1,745,038
Boston Private Wealth Llc reports 40.36% decrease in ownership of AMGN / Amgen Inc.

On April 17, 2026 - Boston Private Wealth Llc filed a 13F-HR form disclosing ownership of 4,959 shares of Amgen Inc. (CH:AMGN) valued at $1,745,038 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 8,315 shares of Amgen Inc.. This represents a change in shares of -40.36% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-04-17 2026-03-31 13F AMGEN COM 031162100 4,959 -3,356 -40.36 1,745 -35.87 0.1150
2026-02-04 2025-12-31 13F AMGEN COM 031162100 8,315 -178 -2.10 2,722 13.56 0.1605
2025-11-06 2025-09-30 13F AMGEN COM 031162100 8,493 -84 -0.98 2,397 0.08 0.1290
2025-08-14 2025-06-30 13F AMGEN COM 031162100 8,577 -6,360 -42.58 2,395 -48.55 0.1283
2025-05-14 2025-03-31 13F AMGEN COM 031162100 14,937 -10,949 -42.30 4,654 -31.03 0.1912
2025-02-05 2024-12-31 13F AMGEN COM 031162100 25,886 25,886 6,747 0.1261
2024-10-18 2024-09-30 13F AMGEN COM 031162100 0 -29,474 -100.00 0 -100.00
2024-08-06 2024-06-30 13F AMGEN COM 031162100 29,474 677 2.35 9,209 12.48 0.2279
2024-05-15 2024-03-31 13F AMGEN COM 031162100 28,797 1,544 5.67 8,188 4.31 0.1825
2024-01-30 2023-12-31 13F AMGEN COM 031162100 27,253 -922 -3.27 7,849 3.66 0.1909
2023-10-23 2023-09-30 13F AMGEN COM 031162100 28,175 -2,704 -8.76 7,572 10.46 0.1663
2023-07-24 2023-06-30 13F AMGEN COM 031162100 30,879 -23,913 -43.64 6,856 -48.25 0.1239
2023-05-12 2023-03-31 13F AMGEN COM 031162100 54,792 -3,049 -5.27 13,246 -12.80 0.1851
2023-02-10 2022-12-31 13F Amgen COM 031162100 57,841 -7,755 -11.82 15,191 2.75 0.2051
2022-11-09 2022-09-30 13F Amgen COM 031162100 65,596 11,830 22.00 14,785 13.03 0.2159
2022-08-16 2022-06-30 13F Amgen COM 031162100 53,766 261 0.49 13,081 1.10 0.2012
2022-05-13 2022-03-31 13F Amgen COM 031162100 53,505 796 1.51 12,939 9.12 0.1733
2022-02-15 2021-12-31 13F Amgen COM 031162100 52,709 -234 -0.44 11,858 5.33 0.1945
2021-11-09 2021-09-30 13F Amgen COM 031162100 52,943 -321 -0.60 11,258 -13.29 0.1446
2021-08-13 2021-06-30 13F Amgen COM 031162100 53,264 -1,186 -2.18 12,983 -4.17 0.1646
2021-05-11 2021-03-31 13F Amgen COM 031162100 54,450 -252 -0.46 13,548 7.72 0.1887
2021-02-10 2020-12-31 13F AMGEN INC COM COM 031162100 54,702 318 0.58 12,577 -9.01 0.1846
2020-11-10 2020-09-30 13F AMGEN INC COM COM 031162100 54,384 -2,830 -4.95 13,823 2.43 0.2280
2020-08-05 2020-06-30 13F AMGEN INC COM COM 031162100 57,214 -2,179 -3.67 13,495 12.08 0.2508
2020-05-11 2020-03-31 13F Amgen COM 031162100 59,393 -2,233 -3.62 12,041 -18.95 0.2923
2020-02-13 2019-12-31 13F Amgen COM 031162100 61,626 -2,950 -4.57 14,856 18.89 0.2704
2019-11-01 2019-09-30 13F Amgen COM 031162100 64,576 -9,014 -12.25 12,496 -7.85 0.2487
2019-07-10 2019-06-30 13F Amgen COM 031162100 73,590 -1,740 -2.31 13,561 -5.24 0.4555
2019-05-14 2019-03-31 13F Amgen COM 031162100 75,330 -4,570 -5.72 14,311 -7.99 0.5653
2019-02-14 2018-12-31 13F Amgen COM 031162100 79,900 -4,067 -4.84 15,553 -10.65 0.6635
2018-11-13 2018-09-30 13F Amgen COM 031162100 83,967 -1,558 -1.82 17,406 10.26 0.6156
2018-08-14 2018-06-30 13F Amgen COM 031162100 85,525 -4,197 -4.68 15,787 3.21 0.6054
2018-05-11 2018-03-31 13F Amgen COM 031162100 89,722 1,410 1.60 15,296 -0.40 0.5867
2018-02-13 2017-12-31 13F Amgen COM 031162100 88,312 -3,602 -3.92 15,358 -10.38 0.5778
2017-11-13 2017-09-30 13F Amgen COM 031162100 91,914 5,162 5.95 17,137 14.70 0.6590
2017-08-04 2017-06-30 13F Amgen COM 031162100 86,752 -3,674 -4.06 14,941 0.71 0.5862
2017-05-11 2017-03-31 13F Amgen COM 031162100 90,426 -11,123 -10.95 14,836 -0.07 0.5910
2017-02-15 2016-12-31 13F Amgen COM 031162100 101,549 -8,504 -7.73 14,847 -19.13 0.6143
2016-11-15 2016-09-30 13F/A-1 Amgen COM 031162100 110,053 -1,917 -1.71 18,358 7.76 0.7466
2016-11-14 2016-09-30 13F Amgen COM 031162100 111,970 0 17,036 0.6950
2016-08-01 2016-06-30 13F Amgen COM 031162100 111,970 3,435 3.16 17,036 4.69 0.6950
2016-05-13 2016-03-31 13F Amgen COM 031162100 108,535 -3,469 -3.10 16,273 -10.50 0.6625
2016-02-12 2015-12-31 13F Amgen COM 031162100 112,004 -13,473 -10.74 18,182 4.76 0.7172
2015-11-12 2015-09-30 13F Amgen COM 031162100 125,477 13,468 12.02 17,356 0.93 0.6728
2015-08-13 2015-06-30 13F Amgen COM 031162100 112,009 -1,638 -1.44 17,196 -5.34 0.5691
2015-05-12 2015-03-31 13F Amgen COM 031162100 113,647 -1,773 -1.54 18,166 -1.19 0.5865
2015-02-10 2014-12-31 13F Amgen COM 031162100 115,420 115,420 18,385 0.5945
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.