AMGEN INC

Ticker: AMGN CUSIP: 031162100 Class: COM

Chesley Taft & Associates LLC's Holding History (CIK: 0001164632)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 20,162 Value ($000) $6,599 Avg Close $315.95 Range $281.00 - $346.38

Q3 2025

Shares 17,597 Value ($000) $4,966 Avg Close $286.59 Range $267.86 - $306.59

Q2 2025

Shares 19,970 Value ($000) $5,576 Avg Close $277.77 Range $255.23 - $307.44

Q1 2025

Shares 19,807 Value ($000) $6,171 Avg Close $287.24 Range $248.95 - $327.92

Q4 2024

Shares 19,305 Value ($000) $5,032 Avg Close $286.05 Range $245.31 - $316.26

Q3 2024

Shares 18,922 Value ($000) $6,097 Avg Close $313.17 Range $292.07 - $330.95

Q2 2024

Shares 18,748 Value ($000) $5,858 Avg Close $279.32 Range $246.97 - $311.17

Q1 2024

Shares 18,965 Value ($000) $5,392 Avg Close $276.08 Range $254.07 - $309.96

Q4 2023

Shares 18,379 Value ($000) $5,294 Avg Close $255.10 Range $232.90 - $271.72

Q3 2023

Shares 16,980 Value ($000) $4,564 Avg Close $231.86 Range $202.11 - $255.21

Q2 2023

Shares 13,920 Value ($000) $3,091 Avg Close $213.65 Range $195.88 - $235.05

Q1 2023

Shares 13,920 Value ($000) $3,365 Avg Close $224.03 Range $206.60 - $251.53

Q4 2022

Shares 13,965 Value ($000) $3,668 Avg Close $242.73 Range $204.31 - $267.70

Q3 2022

Shares 13,995 Value ($000) $3,154 Avg Close $217.87 Range $201.50 - $227.98

Q2 2022

Shares 14,125 Value ($000) $3,437 Avg Close $218.58 Range $201.93 - $231.00

Q1 2022

Shares 14,145 Value ($000) $3,537 Avg Close $203.29 Range $190.45 - $218.06

Q4 2021

Shares 14,070 Value ($000) $3,165 Avg Close $185.15 Range $174.95 - $203.49

Q3 2021

Shares 12,995 Value ($000) $2,763 Avg Close $200.25 Range $184.86 - $217.02

Q2 2021

Shares 13,000 Value ($000) $3,169 Avg Close $212.50 Range $198.84 - $224.64

Q1 2021

Shares 58,729 Value ($000) $14,801 Avg Close $204.69 Range $189.57 - $236.38

Q4 2020

Shares 58,654 Value ($000) $13,486 Avg Close $196.32 Range $178.44 - $219.36

Q3 2020

Shares 13,498 Value ($000) $3,431 Avg Close $209.54 Range $196.05 - $223.35

Q2 2020

Shares 13,638 Value ($000) $3,217 Avg Close $191.68 Range $162.60 - $206.00

Q1 2020

Shares 13,893 Value ($000) $2,817 Avg Close $182.24 Range $148.24 - $202.72

Q4 2019

Shares 11,603 Value ($000) $2,797 Avg Close $182.69 Range $155.91 - $203.67

Q3 2019

Shares 11,623 Value ($000) $2,249 Avg Close $158.01 Range $141.97 - $174.23

Q2 2019

Shares 15,647 Value ($000) $2,883 Avg Close $146.19 Range $135.21 - $160.07

Q1 2019

Shares 15,302 Value ($000) $2,907 Avg Close $154.67 Range $144.94 - $164.86

Q4 2018

Shares 22,504 Value ($000) $4,381 Avg Close $156.83 Range $143.85 - $168.62

Q3 2018

Shares 23,014 Value ($000) $4,771 Avg Close $157.37 Range $145.39 - $168.41

Q2 2018

Shares 22,039 Value ($000) $4,068 Avg Close $140.24 Range $128.97 - $149.68

Q1 2018

Shares 22,630 Value ($000) $3,858 Avg Close $144.43 Range $131.87 - $157.72

Q4 2017

Shares 20,990 Value ($000) $3,650 Avg Close $138.21 Range $131.02 - $147.91

Q3 2017

Shares 9,387 Value ($000) $1,750 Avg Close $137.50 Range $129.63 - $148.76

Q2 2017

Shares 8,367 Value ($000) $1,441 Avg Close $125.35 Range $117.66 - $135.67

Q1 2017

Shares 8,017 Value ($000) $1,315 Avg Close $127.19 Range $112.17 - $141.42

Q4 2016

Shares 59,087 Value ($000) $8,639 Avg Close $114.37 Range $101.21 - $127.75

Q3 2016

Shares 6,717 Value ($000) $1,120 Avg Close $127.72 Range $114.64 - $133.93

Q2 2016

Shares 59,077 Value ($000) $8,989 Avg Close $116.70 Range $108.29 - $123.20

Q1 2016

Shares 58,762 Value ($000) $8,810 Avg Close $110.79 Range $103.99 - $119.01

Q4 2015

Shares 57,897 Value ($000) $9,398 Avg Close $116.50 Range $100.25 - $122.74

Q3 2015

Shares 66,322 Value ($000) $9,174 Avg Close $116.24 Range $96.15 - $133.76

Q2 2015

Shares 67,422 Value ($000) $10,351 Avg Close $117.59 Range $110.98 - $127.09

Q1 2015

Shares 66,747 Value ($000) $10,670 Avg Close $115.04 Range $107.36 - $126.18

Q4 2014

Shares 63,942 Value ($000) $10,185 Avg Close $113.30 Range $92.62 - $126.09

Q3 2014

Shares 60,647 Value ($000) $8,518 Avg Close $94.52 Range $82.98 - $104.80

Q2 2014

Shares 7,272 Value ($000) $861 Avg Close $83.37 Range $77.69 - $91.37

Q1 2014

Shares 7,272 Value ($000) $897 Avg Close $86.89 Range $80.81 - $92.60

Q4 2013

Shares 7,272 Value ($000) $830 Avg Close $81.11 Range $75.24 - $85.16

Q3 2013

Shares 7,265 Value ($000) $813 Avg Close $76.98 Range $67.33 - $83.88

Q2 2013

Shares 7,165 Value ($000) $707 Avg Close $73.34 Range $66.69 - $81.06

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	20,162	$6,599	$315.95	$281.00 - $346.38
Q3 2025	17,597	$4,966	$286.59	$267.86 - $306.59
Q2 2025	19,970	$5,576	$277.77	$255.23 - $307.44
Q1 2025	19,807	$6,171	$287.24	$248.95 - $327.92
Q4 2024	19,305	$5,032	$286.05	$245.31 - $316.26
Q3 2024	18,922	$6,097	$313.17	$292.07 - $330.95
Q2 2024	18,748	$5,858	$279.32	$246.97 - $311.17
Q1 2024	18,965	$5,392	$276.08	$254.07 - $309.96
Q4 2023	18,379	$5,294	$255.10	$232.90 - $271.72
Q3 2023	16,980	$4,564	$231.86	$202.11 - $255.21
Q2 2023	13,920	$3,091	$213.65	$195.88 - $235.05
Q1 2023	13,920	$3,365	$224.03	$206.60 - $251.53
Q4 2022	13,965	$3,668	$242.73	$204.31 - $267.70
Q3 2022	13,995	$3,154	$217.87	$201.50 - $227.98
Q2 2022	14,125	$3,437	$218.58	$201.93 - $231.00
Q1 2022	14,145	$3,537	$203.29	$190.45 - $218.06
Q4 2021	14,070	$3,165	$185.15	$174.95 - $203.49
Q3 2021	12,995	$2,763	$200.25	$184.86 - $217.02
Q2 2021	13,000	$3,169	$212.50	$198.84 - $224.64
Q1 2021	58,729	$14,801	$204.69	$189.57 - $236.38
Q4 2020	58,654	$13,486	$196.32	$178.44 - $219.36
Q3 2020	13,498	$3,431	$209.54	$196.05 - $223.35
Q2 2020	13,638	$3,217	$191.68	$162.60 - $206.00
Q1 2020	13,893	$2,817	$182.24	$148.24 - $202.72
Q4 2019	11,603	$2,797	$182.69	$155.91 - $203.67
Q3 2019	11,623	$2,249	$158.01	$141.97 - $174.23
Q2 2019	15,647	$2,883	$146.19	$135.21 - $160.07
Q1 2019	15,302	$2,907	$154.67	$144.94 - $164.86
Q4 2018	22,504	$4,381	$156.83	$143.85 - $168.62
Q3 2018	23,014	$4,771	$157.37	$145.39 - $168.41
Q2 2018	22,039	$4,068	$140.24	$128.97 - $149.68
Q1 2018	22,630	$3,858	$144.43	$131.87 - $157.72
Q4 2017	20,990	$3,650	$138.21	$131.02 - $147.91
Q3 2017	9,387	$1,750	$137.50	$129.63 - $148.76
Q2 2017	8,367	$1,441	$125.35	$117.66 - $135.67
Q1 2017	8,017	$1,315	$127.19	$112.17 - $141.42
Q4 2016	59,087	$8,639	$114.37	$101.21 - $127.75
Q3 2016	6,717	$1,120	$127.72	$114.64 - $133.93
Q2 2016	59,077	$8,989	$116.70	$108.29 - $123.20
Q1 2016	58,762	$8,810	$110.79	$103.99 - $119.01
Q4 2015	57,897	$9,398	$116.50	$100.25 - $122.74
Q3 2015	66,322	$9,174	$116.24	$96.15 - $133.76
Q2 2015	67,422	$10,351	$117.59	$110.98 - $127.09
Q1 2015	66,747	$10,670	$115.04	$107.36 - $126.18
Q4 2014	63,942	$10,185	$113.30	$92.62 - $126.09
Q3 2014	60,647	$8,518	$94.52	$82.98 - $104.80
Q2 2014	7,272	$861	$83.37	$77.69 - $91.37
Q1 2014	7,272	$897	$86.89	$80.81 - $92.60
Q4 2013	7,272	$830	$81.11	$75.24 - $85.16
Q3 2013	7,265	$813	$76.98	$67.33 - $83.88
Q2 2013	7,165	$707	$73.34	$66.69 - $81.06