BERKSHIRE HATHAWAY INC DEL

Ticker: BRK/B CUSIP: 084670702 Class: Common Stock

Great Diamond Partners, LLC's Holding History (CIK: 0001801112)

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

Q4 2025

Shares 3,044 Value ($000) $1,530 Avg Close $497.53 Range $473.15 - $516.85

Q3 2025

Shares 3,035 Value ($000) $1,526 Avg Close $484.36 Range $455.19 - $507.66

Q2 2025

Shares 3,038 Value ($000) $1,476 Avg Close $507.86 Range $462.10 - $542.07

Q1 2025

Shares 2,982 Value ($000) $1,588 Avg Close $486.15 Range $440.10 - $537.63

Q4 2024

Shares 2,909 Value ($000) $1,319 Avg Close $461.73 Range $437.90 - $491.67

Q3 2024

Shares 2,900 Value ($000) $1,335 Avg Close $442.18 Range $403.82 - $484.82

Q2 2024

Shares 2,983 Value ($000) $1,213 Avg Close $408.62 Range $395.66 - $424.52

Q1 2024

Shares 3,116 Value ($000) $1,310 Avg Close $393.34 Range $355.94 - $430.00

Q4 2023

Shares 3,203 Value ($000) $1,142 Avg Close $350.99 Range $330.58 - $364.05

Q3 2023

Shares 3,226 Value ($000) $1,130 Avg Close $354.77 Range $338.41 - $373.34

Q2 2023

Shares 2,951 Value ($000) $1,006 Avg Close $326.37 Range $307.07 - $342.50

Q1 2023

Shares 2,835 Value ($000) $875 Avg Close $308.18 Range $292.42 - $321.32

Q4 2022

Shares 2,989 Value ($000) $923 Avg Close $296.98 Range $259.85 - $319.56

Q3 2022

Shares 3,162 Value ($000) $844 Avg Close $284.56 Range $261.55 - $308.15

Q2 2022

Shares 3,158 Value ($000) $862 Avg Close $313.72 Range $263.68 - $354.58

Q1 2022

Shares 3,091 Value ($000) $1,090 Avg Close $323.46 Range $294.81 - $362.10

Q4 2021

Shares 3,030 Value ($000) $905 Avg Close $286.41 Range $272.22 - $301.65

Q3 2021

Shares 3,030 Value ($000) $827 Avg Close $280.86 Range $270.73 - $291.82

Q2 2021

Shares 2,737 Value ($000) $760 Avg Close $279.44 Range $254.80 - $295.08

Q1 2021

Shares 2,798 Value ($000) $714 Avg Close $242.84 Range $226.10 - $267.50

Q4 2020

Shares 2,758 Value ($000) $639 Avg Close $220.20 Range $197.81 - $234.99

Q3 2020

Shares 3,317 Value ($000) $706 Avg Close $204.56 Range $177.34 - $223.24

Q2 2020

Shares 3,218 Value ($000) $574 Avg Close $182.62 Range $167.04 - $203.33

Q1 2020

Shares 3,531 Value ($000) $645 Avg Close $212.55 Range $159.50 - $231.61

Q4 2019

Shares 3,171 Value ($000) $718 Avg Close $217.17 Range $201.33 - $228.23

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	3,044	$1,530	$497.53	$473.15 - $516.85
Q3 2025	3,035	$1,526	$484.36	$455.19 - $507.66
Q2 2025	3,038	$1,476	$507.86	$462.10 - $542.07
Q1 2025	2,982	$1,588	$486.15	$440.10 - $537.63
Q4 2024	2,909	$1,319	$461.73	$437.90 - $491.67
Q3 2024	2,900	$1,335	$442.18	$403.82 - $484.82
Q2 2024	2,983	$1,213	$408.62	$395.66 - $424.52
Q1 2024	3,116	$1,310	$393.34	$355.94 - $430.00
Q4 2023	3,203	$1,142	$350.99	$330.58 - $364.05
Q3 2023	3,226	$1,130	$354.77	$338.41 - $373.34
Q2 2023	2,951	$1,006	$326.37	$307.07 - $342.50
Q1 2023	2,835	$875	$308.18	$292.42 - $321.32
Q4 2022	2,989	$923	$296.98	$259.85 - $319.56
Q3 2022	3,162	$844	$284.56	$261.55 - $308.15
Q2 2022	3,158	$862	$313.72	$263.68 - $354.58
Q1 2022	3,091	$1,090	$323.46	$294.81 - $362.10
Q4 2021	3,030	$905	$286.41	$272.22 - $301.65
Q3 2021	3,030	$827	$280.86	$270.73 - $291.82
Q2 2021	2,737	$760	$279.44	$254.80 - $295.08
Q1 2021	2,798	$714	$242.84	$226.10 - $267.50
Q4 2020	2,758	$639	$220.20	$197.81 - $234.99
Q3 2020	3,317	$706	$204.56	$177.34 - $223.24
Q2 2020	3,218	$574	$182.62	$167.04 - $203.33
Q1 2020	3,531	$645	$212.55	$159.50 - $231.61
Q4 2019	3,171	$718	$217.17	$201.33 - $228.23