BERKSHIRE HATHAWAY INC DEL

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

NBT BANK N A /NY's Holding History (CIK: 0000898413)

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

Q4 2025

Shares 35,153 Value ($000) $18,697 Avg Close $497.53 Range $473.15 - $516.85

Q3 2025

Shares 35,781 Value ($000) $19,017 Avg Close $484.36 Range $455.19 - $507.66

Q2 2025

Shares 36,517 Value ($000) $17,739 Avg Close $507.86 Range $462.10 - $542.07

Q1 2025

Shares 38,080 Value ($000) $20,281 Avg Close $486.15 Range $440.10 - $537.63

Q4 2024

Shares 36,650 Value ($000) $16,613 Avg Close $461.73 Range $437.90 - $491.67

Q3 2024

Shares 40,838 Value ($000) $18,796 Avg Close $442.18 Range $403.82 - $484.82

Q2 2024

Shares 39,726 Value ($000) $16,160 Avg Close $408.62 Range $395.66 - $424.52

Q1 2024

Shares 46,786 Value ($000) $19,674 Avg Close $393.34 Range $355.94 - $430.00

Q4 2023

Shares 47,097 Value ($000) $16,798 Avg Close $350.99 Range $330.58 - $364.05

Q3 2023

Shares 49,364 Value ($000) $17,292 Avg Close $354.77 Range $338.41 - $373.34

Q2 2023

Shares 16,832 Value ($000) $5,740 Avg Close $326.37 Range $307.07 - $342.50

Q1 2023

Shares 17,171 Value ($000) $5,302 Avg Close $308.18 Range $292.42 - $321.32

Q4 2022

Shares 17,192 Value ($000) $5,311 Avg Close $296.98 Range $259.85 - $319.56

Q3 2022

Shares 16,851 Value ($000) $4,500 Avg Close $284.56 Range $261.55 - $308.15

Q2 2022

Shares 16,868 Value ($000) $4,605 Avg Close $313.72 Range $263.68 - $354.58

Q1 2022

Shares 17,494 Value ($000) $6,174 Avg Close $323.46 Range $294.81 - $362.10

Q4 2021

Shares 19,141 Value ($000) $5,723 Avg Close $286.41 Range $272.22 - $301.65

Q3 2021

Shares 19,158 Value ($000) $5,229 Avg Close $280.86 Range $270.73 - $291.82

Q2 2021

Shares 19,228 Value ($000) $5,344 Avg Close $279.44 Range $254.80 - $295.08

Q1 2021

Shares 19,502 Value ($000) $4,982 Avg Close $242.84 Range $226.10 - $267.50

Q4 2020

Shares 20,157 Value ($000) $4,673 Avg Close $220.20 Range $197.81 - $234.99

Q3 2020

Shares 19,592 Value ($000) $4,172 Avg Close $204.56 Range $177.34 - $223.24

Q2 2020

Shares 20,154 Value ($000) $3,597 Avg Close $182.62 Range $167.04 - $203.33

Q1 2020

Shares 20,359 Value ($000) $3,722 Avg Close $212.55 Range $159.50 - $231.61

Q4 2019

Shares 20,761 Value ($000) $4,702 Avg Close $217.17 Range $201.33 - $228.23

Q3 2019

Shares 19,870 Value ($000) $4,134 Avg Close $206.04 Range $195.40 - $216.58

Q2 2019

Shares 20,643 Value ($000) $4,400 Avg Close $206.92 Range $196.89 - $219.16

Q1 2019

Shares 21,019 Value ($000) $4,222 Avg Close $201.85 Range $191.04 - $209.40

Q4 2018

Shares 21,377 Value ($000) $4,365 Avg Close $208.87 Range $186.10 - $224.07

Q3 2018

Shares 22,258 Value ($000) $4,766 Avg Close $205.18 Range $185.72 - $223.00

Q2 2018

Shares 25,051 Value ($000) $4,676 Avg Close $194.92 Range $184.75 - $202.77

Q1 2018

Shares 28,179 Value ($000) $5,621 Avg Close $205.34 Range $189.30 - $217.62

Q4 2017

Shares 28,998 Value ($000) $5,748 Avg Close $189.88 Range $180.44 - $200.50

Q3 2017

Shares 30,442 Value ($000) $5,580 Avg Close $176.72 Range $168.00 - $184.00

Q2 2017

Shares 32,880 Value ($000) $5,569 Avg Close $166.33 Range $160.93 - $171.95

Q1 2017

Shares 33,898 Value ($000) $5,650 Avg Close $167.31 Range $158.61 - $177.86

Q4 2016

Shares 33,871 Value ($000) $5,520 Avg Close $153.96 Range $141.92 - $167.25

Q3 2016

Shares 33,904 Value ($000) $4,898 Avg Close $146.25 Range $140.95 - $151.05

Q2 2016

Shares 34,556 Value ($000) $5,003 Avg Close $142.96 Range $136.65 - $148.03

Q1 2016

Shares 34,264 Value ($000) $4,862 Avg Close $132.58 Range $123.55 - $143.40

Q4 2015

Shares 34,193 Value ($000) $4,515 Avg Close $134.20 Range $127.46 - $138.62

Q3 2015

Shares 34,809 Value ($000) $4,539 Avg Close $137.00 Range $125.50 - $144.69

Q2 2015

Shares 37,201 Value ($000) $5,063 Avg Close $142.63 Range $136.08 - $148.57

Q1 2015

Shares 37,576 Value ($000) $5,423 Avg Close $147.14 Range $142.50 - $151.69

Q4 2014

Shares 38,022 Value ($000) $5,709 Avg Close $144.37 Range $132.03 - $152.94

Q3 2014

Shares 39,119 Value ($000) $5,404 Avg Close $133.21 Range $122.72 - $142.45

Q2 2014

Shares 42,581 Value ($000) $5,389 Avg Close $126.57 Range $121.09 - $129.73

Q1 2014

Shares 48,325 Value ($000) $6,039 Avg Close $116.85 Range $108.12 - $125.91

Q4 2013

Shares 49,050 Value ($000) $5,815 Avg Close $115.63 Range $110.84 - $118.66

Q3 2013

Shares 48,902 Value ($000) $5,550 Avg Close $115.36 Range $110.72 - $119.30

Q2 2013

Shares 47,167 Value ($000) $5,279 Avg Close $110.02 Range $102.69 - $115.98

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	35,153	$18,697	$497.53	$473.15 - $516.85
Q3 2025	35,781	$19,017	$484.36	$455.19 - $507.66
Q2 2025	36,517	$17,739	$507.86	$462.10 - $542.07
Q1 2025	38,080	$20,281	$486.15	$440.10 - $537.63
Q4 2024	36,650	$16,613	$461.73	$437.90 - $491.67
Q3 2024	40,838	$18,796	$442.18	$403.82 - $484.82
Q2 2024	39,726	$16,160	$408.62	$395.66 - $424.52
Q1 2024	46,786	$19,674	$393.34	$355.94 - $430.00
Q4 2023	47,097	$16,798	$350.99	$330.58 - $364.05
Q3 2023	49,364	$17,292	$354.77	$338.41 - $373.34
Q2 2023	16,832	$5,740	$326.37	$307.07 - $342.50
Q1 2023	17,171	$5,302	$308.18	$292.42 - $321.32
Q4 2022	17,192	$5,311	$296.98	$259.85 - $319.56
Q3 2022	16,851	$4,500	$284.56	$261.55 - $308.15
Q2 2022	16,868	$4,605	$313.72	$263.68 - $354.58
Q1 2022	17,494	$6,174	$323.46	$294.81 - $362.10
Q4 2021	19,141	$5,723	$286.41	$272.22 - $301.65
Q3 2021	19,158	$5,229	$280.86	$270.73 - $291.82
Q2 2021	19,228	$5,344	$279.44	$254.80 - $295.08
Q1 2021	19,502	$4,982	$242.84	$226.10 - $267.50
Q4 2020	20,157	$4,673	$220.20	$197.81 - $234.99
Q3 2020	19,592	$4,172	$204.56	$177.34 - $223.24
Q2 2020	20,154	$3,597	$182.62	$167.04 - $203.33
Q1 2020	20,359	$3,722	$212.55	$159.50 - $231.61
Q4 2019	20,761	$4,702	$217.17	$201.33 - $228.23
Q3 2019	19,870	$4,134	$206.04	$195.40 - $216.58
Q2 2019	20,643	$4,400	$206.92	$196.89 - $219.16
Q1 2019	21,019	$4,222	$201.85	$191.04 - $209.40
Q4 2018	21,377	$4,365	$208.87	$186.10 - $224.07
Q3 2018	22,258	$4,766	$205.18	$185.72 - $223.00
Q2 2018	25,051	$4,676	$194.92	$184.75 - $202.77
Q1 2018	28,179	$5,621	$205.34	$189.30 - $217.62
Q4 2017	28,998	$5,748	$189.88	$180.44 - $200.50
Q3 2017	30,442	$5,580	$176.72	$168.00 - $184.00
Q2 2017	32,880	$5,569	$166.33	$160.93 - $171.95
Q1 2017	33,898	$5,650	$167.31	$158.61 - $177.86
Q4 2016	33,871	$5,520	$153.96	$141.92 - $167.25
Q3 2016	33,904	$4,898	$146.25	$140.95 - $151.05
Q2 2016	34,556	$5,003	$142.96	$136.65 - $148.03
Q1 2016	34,264	$4,862	$132.58	$123.55 - $143.40
Q4 2015	34,193	$4,515	$134.20	$127.46 - $138.62
Q3 2015	34,809	$4,539	$137.00	$125.50 - $144.69
Q2 2015	37,201	$5,063	$142.63	$136.08 - $148.57
Q1 2015	37,576	$5,423	$147.14	$142.50 - $151.69
Q4 2014	38,022	$5,709	$144.37	$132.03 - $152.94
Q3 2014	39,119	$5,404	$133.21	$122.72 - $142.45
Q2 2014	42,581	$5,389	$126.57	$121.09 - $129.73
Q1 2014	48,325	$6,039	$116.85	$108.12 - $125.91
Q4 2013	49,050	$5,815	$115.63	$110.84 - $118.66
Q3 2013	48,902	$5,550	$115.36	$110.72 - $119.30
Q2 2013	47,167	$5,279	$110.02	$102.69 - $115.98