INTERNATIONAL BUSINESS MACHS

Ticker: IBM CUSIP: 459200101 Class: COM

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

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

Q4 2025

Shares 16,067 Value ($000) $4,759 Avg Close $298.78 Range $262.11 - $324.90

Q3 2025

Shares 19,252 Value ($000) $5,432 Avg Close $259.55 Range $232.08 - $292.01

Q2 2025

Shares 19,113 Value ($000) $5,634 Avg Close $253.82 Range $210.49 - $292.56

Q1 2025

Shares 20,498 Value ($000) $5,097 Avg Close $239.40 Range $209.20 - $261.47

Q4 2024

Shares 20,453 Value ($000) $4,496 Avg Close $216.31 Range $196.83 - $233.32

Q3 2024

Shares 18,116 Value ($000) $4,005 Avg Close $188.97 Range $166.24 - $216.80

Q2 2024

Shares 16,966 Value ($000) $2,934 Avg Close $165.85 Range $154.39 - $183.50

Q1 2024

Shares 17,241 Value ($000) $3,292 Avg Close $172.56 Range $148.54 - $189.10

Q4 2023

Shares 14,821 Value ($000) $2,424 Avg Close $141.50 Range $126.39 - $156.49

Q3 2023

Shares 10,615 Value ($000) $1,489 Avg Close $131.75 Range $120.98 - $141.33

Q2 2023

Shares 10,615 Value ($000) $1,420 Avg Close $118.05 Range $110.47 - $128.27

Q1 2023

Shares 11,021 Value ($000) $1,445 Avg Close $120.73 Range $110.43 - $131.92

Q4 2022

Shares 11,041 Value ($000) $1,556 Avg Close $123.05 Range $102.35 - $137.32

Q3 2022

Shares 11,226 Value ($000) $1,334 Avg Close $115.64 Range $105.06 - $124.09

Q2 2022

Shares 11,432 Value ($000) $1,614 Avg Close $117.50 Range $107.95 - $126.60

Q1 2022

Shares 11,031 Value ($000) $1,390 Avg Close $112.10 Range $102.68 - $121.43

Q4 2021

Shares 10,981 Value ($000) $1,468 Avg Close $106.49 Range $97.83 - $117.62

Q3 2021

Shares 11,620 Value ($000) $1,614 Avg Close $112.12 Range $106.97 - $117.48

Q2 2021

Shares 9,955 Value ($000) $1,459 Avg Close $113.44 Range $102.70 - $121.73

Q1 2021

Shares 9,805 Value ($000) $1,333 Avg Close $98.07 Range $91.22 - $107.97

Q4 2020

Shares 9,805 Value ($000) $1,234 Avg Close $93.41 Range $81.15 - $103.82

Q3 2020

Shares 103,265 Value ($000) $12,564 Avg Close $93.86 Range $87.12 - $99.96

Q2 2020

Shares 106,310 Value ($000) $12,839 Avg Close $91.40 Range $78.00 - $102.76

Q1 2020

Shares 108,120 Value ($000) $11,994 Avg Close $98.28 Range $67.58 - $117.24

Q4 2019

Shares 39,541 Value ($000) $5,300 Avg Close $99.90 Range $95.55 - $107.55

Q3 2019

Shares 38,279 Value ($000) $5,567 Avg Close $102.47 Range $94.04 - $110.34

Q2 2019

Shares 38,204 Value ($000) $5,268 Avg Close $98.62 Range $91.51 - $103.66

Q1 2019

Shares 37,583 Value ($000) $5,303 Avg Close $94.64 Range $78.71 - $101.33

Q4 2018

Shares 38,549 Value ($000) $4,382 Avg Close $87.95 Range $74.66 - $107.42

Q3 2018

Shares 43,801 Value ($000) $6,623 Avg Close $101.25 Range $95.14 - $106.71

Q2 2018

Shares 43,971 Value ($000) $6,143 Avg Close $99.95 Range $94.63 - $110.30

Q1 2018

Shares 42,666 Value ($000) $6,546 Avg Close $107.30 Range $98.32 - $115.38

Q4 2017

Shares 41,827 Value ($000) $6,417 Avg Close $102.11 Range $96.94 - $108.49

Q3 2017

Shares 41,126 Value ($000) $5,967 Avg Close $96.87 Range $92.88 - $103.07

Q2 2017

Shares 41,033 Value ($000) $6,312 Avg Close $103.77 Range $98.95 - $115.36

Q1 2017

Shares 41,554 Value ($000) $7,236 Avg Close $114.39 Range $107.32 - $119.58

Q4 2016

Shares 40,586 Value ($000) $6,737 Avg Close $103.05 Range $95.06 - $110.31

Q3 2016

Shares 40,653 Value ($000) $6,458 Avg Close $101.76 Range $95.61 - $106.13

Q2 2016

Shares 40,447 Value ($000) $6,139 Avg Close $95.13 Range $90.08 - $99.15

Q1 2016

Shares 39,178 Value ($000) $5,934 Avg Close $84.07 Range $73.78 - $96.70

Q4 2015

Shares 35,539 Value ($000) $4,891 Avg Close $87.52 Range $82.31 - $94.87

Q3 2015

Shares 100,031 Value ($000) $14,502 Avg Close $95.35 Range $87.10 - $106.76

Q2 2015

Shares 98,810 Value ($000) $16,072 Avg Close $102.99 Range $96.57 - $107.49

Q1 2015

Shares 93,533 Value ($000) $15,012 Avg Close $96.47 Range $90.53 - $100.82

Q4 2014

Shares 32,876 Value ($000) $5,275 Avg Close $100.47 Range $91.12 - $114.79

Q3 2014

Shares 38,861 Value ($000) $7,377 Avg Close $114.33 Range $108.62 - $117.41

Q2 2014

Shares 39,725 Value ($000) $7,201 Avg Close $112.28 Range $107.17 - $118.40

Q1 2014

Shares 41,108 Value ($000) $7,913 Avg Close $109.22 Range $101.79 - $116.27

Q4 2013

Shares 80,446 Value ($000) $15,089 Avg Close $106.40 Range $101.46 - $111.01

Q3 2013

Shares 85,703 Value ($000) $15,870 Avg Close $111.55 Range $106.48 - $117.56

Q2 2013

Shares 101,993 Value ($000) $19,492 Avg Close $118.94 Range $109.29 - $125.13

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	16,067	$4,759	$298.78	$262.11 - $324.90
Q3 2025	19,252	$5,432	$259.55	$232.08 - $292.01
Q2 2025	19,113	$5,634	$253.82	$210.49 - $292.56
Q1 2025	20,498	$5,097	$239.40	$209.20 - $261.47
Q4 2024	20,453	$4,496	$216.31	$196.83 - $233.32
Q3 2024	18,116	$4,005	$188.97	$166.24 - $216.80
Q2 2024	16,966	$2,934	$165.85	$154.39 - $183.50
Q1 2024	17,241	$3,292	$172.56	$148.54 - $189.10
Q4 2023	14,821	$2,424	$141.50	$126.39 - $156.49
Q3 2023	10,615	$1,489	$131.75	$120.98 - $141.33
Q2 2023	10,615	$1,420	$118.05	$110.47 - $128.27
Q1 2023	11,021	$1,445	$120.73	$110.43 - $131.92
Q4 2022	11,041	$1,556	$123.05	$102.35 - $137.32
Q3 2022	11,226	$1,334	$115.64	$105.06 - $124.09
Q2 2022	11,432	$1,614	$117.50	$107.95 - $126.60
Q1 2022	11,031	$1,390	$112.10	$102.68 - $121.43
Q4 2021	10,981	$1,468	$106.49	$97.83 - $117.62
Q3 2021	11,620	$1,614	$112.12	$106.97 - $117.48
Q2 2021	9,955	$1,459	$113.44	$102.70 - $121.73
Q1 2021	9,805	$1,333	$98.07	$91.22 - $107.97
Q4 2020	9,805	$1,234	$93.41	$81.15 - $103.82
Q3 2020	103,265	$12,564	$93.86	$87.12 - $99.96
Q2 2020	106,310	$12,839	$91.40	$78.00 - $102.76
Q1 2020	108,120	$11,994	$98.28	$67.58 - $117.24
Q4 2019	39,541	$5,300	$99.90	$95.55 - $107.55
Q3 2019	38,279	$5,567	$102.47	$94.04 - $110.34
Q2 2019	38,204	$5,268	$98.62	$91.51 - $103.66
Q1 2019	37,583	$5,303	$94.64	$78.71 - $101.33
Q4 2018	38,549	$4,382	$87.95	$74.66 - $107.42
Q3 2018	43,801	$6,623	$101.25	$95.14 - $106.71
Q2 2018	43,971	$6,143	$99.95	$94.63 - $110.30
Q1 2018	42,666	$6,546	$107.30	$98.32 - $115.38
Q4 2017	41,827	$6,417	$102.11	$96.94 - $108.49
Q3 2017	41,126	$5,967	$96.87	$92.88 - $103.07
Q2 2017	41,033	$6,312	$103.77	$98.95 - $115.36
Q1 2017	41,554	$7,236	$114.39	$107.32 - $119.58
Q4 2016	40,586	$6,737	$103.05	$95.06 - $110.31
Q3 2016	40,653	$6,458	$101.76	$95.61 - $106.13
Q2 2016	40,447	$6,139	$95.13	$90.08 - $99.15
Q1 2016	39,178	$5,934	$84.07	$73.78 - $96.70
Q4 2015	35,539	$4,891	$87.52	$82.31 - $94.87
Q3 2015	100,031	$14,502	$95.35	$87.10 - $106.76
Q2 2015	98,810	$16,072	$102.99	$96.57 - $107.49
Q1 2015	93,533	$15,012	$96.47	$90.53 - $100.82
Q4 2014	32,876	$5,275	$100.47	$91.12 - $114.79
Q3 2014	38,861	$7,377	$114.33	$108.62 - $117.41
Q2 2014	39,725	$7,201	$112.28	$107.17 - $118.40
Q1 2014	41,108	$7,913	$109.22	$101.79 - $116.27
Q4 2013	80,446	$15,089	$106.40	$101.46 - $111.01
Q3 2013	85,703	$15,870	$111.55	$106.48 - $117.56
Q2 2013	101,993	$19,492	$118.94	$109.29 - $125.13