BERKSHIRE HATHAWAY INC DEL

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

STATE OF MICHIGAN RETIREMENT SYSTEM's Holding History (CIK: 0000762152)

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

Q4 2025

Shares 339,729 Value ($000) $170,765 Avg Close $497.53 Range $473.15 - $516.85

Q3 2025

Shares 344,029 Value ($000) $172,957 Avg Close $484.36 Range $455.19 - $507.66

Q2 2025

Shares 346,529 Value ($000) $168,333 Avg Close $507.86 Range $462.10 - $542.07

Q1 2025

Shares 345,329 Value ($000) $183,915 Avg Close $486.15 Range $440.10 - $537.63

Q4 2024

Shares 345,229 Value ($000) $156,485 Avg Close $461.73 Range $437.90 - $491.67

Q3 2024

Shares 351,829 Value ($000) $161,933 Avg Close $442.18 Range $403.82 - $484.82

Q2 2024

Shares 348,129 Value ($000) $141,619 Avg Close $408.62 Range $395.66 - $424.52

Q1 2024

Shares 368,649 Value ($000) $155,024 Avg Close $393.34 Range $355.94 - $430.00

Q4 2023

Shares 364,849 Value ($000) $130,127 Avg Close $350.99 Range $330.58 - $364.05

Q3 2023

Shares 367,949 Value ($000) $128,893 Avg Close $354.77 Range $338.41 - $373.34

Q2 2023

Shares 357,749 Value ($000) $121,992 Avg Close $326.37 Range $307.07 - $342.50

Q1 2023

Shares 363,649 Value ($000) $112,284 Avg Close $308.18 Range $292.42 - $321.32

Q4 2022

Shares 358,549 Value ($000) $110,756 Avg Close $296.98 Range $259.85 - $319.56

Q3 2022

Shares 358,249 Value ($000) $95,660 Avg Close $284.56 Range $261.55 - $308.15

Q2 2022

Shares 359,049 Value ($000) $98,028 Avg Close $313.72 Range $263.68 - $354.58

Q1 2022

Shares 325,649 Value ($000) $114,925 Avg Close $323.46 Range $294.81 - $362.10

Q4 2021

Shares 323,362 Value ($000) $96,685 Avg Close $286.41 Range $272.22 - $301.65

Q3 2021

Shares 345,662 Value ($000) $94,345 Avg Close $280.86 Range $270.73 - $291.82

Q2 2021

Shares 357,062 Value ($000) $99,235 Avg Close $279.44 Range $254.80 - $295.08

Q1 2021

Shares 643,662 Value ($000) $164,436 Avg Close $242.84 Range $226.10 - $267.50

Q4 2020

Shares 643,462 Value ($000) $149,200 Avg Close $220.20 Range $197.81 - $234.99

Q3 2020

Shares 700,942 Value ($000) $149,259 Avg Close $204.56 Range $177.34 - $223.24

Q2 2020

Shares 691,942 Value ($000) $123,519 Avg Close $182.62 Range $167.04 - $203.33

Q1 2020

Shares 706,399 Value ($000) $129,151 Avg Close $212.55 Range $159.50 - $231.61

Q4 2019

Shares 745,519 Value ($000) $168,860 Avg Close $217.17 Range $201.33 - $228.23

Q3 2019

Shares 719,299 Value ($000) $149,629 Avg Close $206.04 Range $195.40 - $216.58

Q2 2019

Shares 711,999 Value ($000) $151,777 Avg Close $206.92 Range $196.89 - $219.16

Q1 2019

Shares 861,599 Value ($000) $173,087 Avg Close $201.85 Range $191.04 - $209.40

Q4 2018

Shares 942,234 Value ($000) $192,385 Avg Close $208.87 Range $186.10 - $224.07

Q3 2018

Shares 1,122,370 Value ($000) $240,311 Avg Close $205.18 Range $185.72 - $223.00

Q2 2018

Shares 1,078,062 Value ($000) $201,220 Avg Close $194.92 Range $184.75 - $202.77

Q1 2018

Shares 1,092,362 Value ($000) $217,904 Avg Close $205.34 Range $189.30 - $217.62

Q4 2017

Shares 2,389,962 Value ($000) $473,738 Avg Close $189.88 Range $180.44 - $200.50

Q3 2017

Shares 2,454,662 Value ($000) $449,989 Avg Close $176.72 Range $168.00 - $184.00

Q2 2017

Shares 2,795,162 Value ($000) $473,417 Avg Close $166.33 Range $160.93 - $171.95

Q1 2017

Shares 2,794,862 Value ($000) $465,848 Avg Close $167.31 Range $158.61 - $177.86

Q4 2016

Shares 2,837,162 Value ($000) $462,401 Avg Close $153.96 Range $141.92 - $167.25

Q3 2016

Shares 2,612,066 Value ($000) $377,365 Avg Close $146.25 Range $140.95 - $151.05

Q2 2016

Shares 2,721,466 Value ($000) $394,041 Avg Close $142.96 Range $136.65 - $148.03

Q1 2016

Shares 1,528,466 Value ($000) $216,859 Avg Close $132.58 Range $123.55 - $143.40

Q4 2015

Shares 497,466 Value ($000) $65,685 Avg Close $134.20 Range $127.46 - $138.62

Q3 2015

Shares 499,766 Value ($000) $65,169 Avg Close $137.00 Range $125.50 - $144.69

Q2 2015

Shares 1,083,166 Value ($000) $147,430 Avg Close $142.63 Range $136.08 - $148.57

Q1 2015

Shares 1,079,266 Value ($000) $155,760 Avg Close $147.14 Range $142.50 - $151.69

Q4 2014

Shares 577,666 Value ($000) $86,737 Avg Close $144.37 Range $132.03 - $152.94

Q3 2014

Shares 573,566 Value ($000) $79,232 Avg Close $133.21 Range $122.72 - $142.45

Q2 2014

Shares 563,966 Value ($000) $71,376 Avg Close $126.57 Range $121.09 - $129.73

Q1 2014

Shares 560,766 Value ($000) $70,079 Avg Close $116.85 Range $108.12 - $125.91

Q4 2013

Shares 557,766 Value ($000) $66,129 Avg Close $115.63 Range $110.84 - $118.66

Q3 2013

Shares 566,666 Value ($000) $64,322 Avg Close $115.36 Range $110.72 - $119.30

Q2 2013

Shares 566,666 Value ($000) $63,421 Avg Close $110.02 Range $102.69 - $115.98

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	339,729	$170,765	$497.53	$473.15 - $516.85
Q3 2025	344,029	$172,957	$484.36	$455.19 - $507.66
Q2 2025	346,529	$168,333	$507.86	$462.10 - $542.07
Q1 2025	345,329	$183,915	$486.15	$440.10 - $537.63
Q4 2024	345,229	$156,485	$461.73	$437.90 - $491.67
Q3 2024	351,829	$161,933	$442.18	$403.82 - $484.82
Q2 2024	348,129	$141,619	$408.62	$395.66 - $424.52
Q1 2024	368,649	$155,024	$393.34	$355.94 - $430.00
Q4 2023	364,849	$130,127	$350.99	$330.58 - $364.05
Q3 2023	367,949	$128,893	$354.77	$338.41 - $373.34
Q2 2023	357,749	$121,992	$326.37	$307.07 - $342.50
Q1 2023	363,649	$112,284	$308.18	$292.42 - $321.32
Q4 2022	358,549	$110,756	$296.98	$259.85 - $319.56
Q3 2022	358,249	$95,660	$284.56	$261.55 - $308.15
Q2 2022	359,049	$98,028	$313.72	$263.68 - $354.58
Q1 2022	325,649	$114,925	$323.46	$294.81 - $362.10
Q4 2021	323,362	$96,685	$286.41	$272.22 - $301.65
Q3 2021	345,662	$94,345	$280.86	$270.73 - $291.82
Q2 2021	357,062	$99,235	$279.44	$254.80 - $295.08
Q1 2021	643,662	$164,436	$242.84	$226.10 - $267.50
Q4 2020	643,462	$149,200	$220.20	$197.81 - $234.99
Q3 2020	700,942	$149,259	$204.56	$177.34 - $223.24
Q2 2020	691,942	$123,519	$182.62	$167.04 - $203.33
Q1 2020	706,399	$129,151	$212.55	$159.50 - $231.61
Q4 2019	745,519	$168,860	$217.17	$201.33 - $228.23
Q3 2019	719,299	$149,629	$206.04	$195.40 - $216.58
Q2 2019	711,999	$151,777	$206.92	$196.89 - $219.16
Q1 2019	861,599	$173,087	$201.85	$191.04 - $209.40
Q4 2018	942,234	$192,385	$208.87	$186.10 - $224.07
Q3 2018	1,122,370	$240,311	$205.18	$185.72 - $223.00
Q2 2018	1,078,062	$201,220	$194.92	$184.75 - $202.77
Q1 2018	1,092,362	$217,904	$205.34	$189.30 - $217.62
Q4 2017	2,389,962	$473,738	$189.88	$180.44 - $200.50
Q3 2017	2,454,662	$449,989	$176.72	$168.00 - $184.00
Q2 2017	2,795,162	$473,417	$166.33	$160.93 - $171.95
Q1 2017	2,794,862	$465,848	$167.31	$158.61 - $177.86
Q4 2016	2,837,162	$462,401	$153.96	$141.92 - $167.25
Q3 2016	2,612,066	$377,365	$146.25	$140.95 - $151.05
Q2 2016	2,721,466	$394,041	$142.96	$136.65 - $148.03
Q1 2016	1,528,466	$216,859	$132.58	$123.55 - $143.40
Q4 2015	497,466	$65,685	$134.20	$127.46 - $138.62
Q3 2015	499,766	$65,169	$137.00	$125.50 - $144.69
Q2 2015	1,083,166	$147,430	$142.63	$136.08 - $148.57
Q1 2015	1,079,266	$155,760	$147.14	$142.50 - $151.69
Q4 2014	577,666	$86,737	$144.37	$132.03 - $152.94
Q3 2014	573,566	$79,232	$133.21	$122.72 - $142.45
Q2 2014	563,966	$71,376	$126.57	$121.09 - $129.73
Q1 2014	560,766	$70,079	$116.85	$108.12 - $125.91
Q4 2013	557,766	$66,129	$115.63	$110.84 - $118.66
Q3 2013	566,666	$64,322	$115.36	$110.72 - $119.30
Q2 2013	566,666	$63,421	$110.02	$102.69 - $115.98