MESA LABS INC

Ticker: MLAB CUSIP: 59064R109 Class: Common Stock

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM's Holding History (CIK: 0001081019)

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

Q4 2025

Shares 323 Value ($000) $25 Avg Close $75.96 Range $66.39 - $83.18

Q3 2025

Shares 382 Value ($000) $26 Avg Close $71.72 Range $55.21 - $103.28

Q2 2025

Shares 5,041 Value ($000) $475 Avg Close $109.15 Range $87.42 - $130.43

Q1 2025

Shares 5,041 Value ($000) $598 Avg Close $135.40 Range $114.00 - $154.03

Q4 2024

Shares 5,041 Value ($000) $665 Avg Close $121.79 Range $97.08 - $139.36

Q3 2024

Shares 5,095 Value ($000) $662 Avg Close $116.53 Range $85.22 - $139.82

Q2 2024

Shares 5,251 Value ($000) $456 Avg Close $103.60 Range $82.88 - $122.43

Q1 2024

Shares 5,367 Value ($000) $589 Avg Close $99.55 Range $87.54 - $114.48

Q4 2023

Shares 5,647 Value ($000) $592 Avg Close $96.12 Range $81.68 - $118.22

Q3 2023

Shares 5,894 Value ($000) $619 Avg Close $126.18 Range $101.78 - $143.38

Q2 2023

Shares 6,420 Value ($000) $825 Avg Close $149.94 Range $122.07 - $184.65

Q1 2023

Shares 6,585 Value ($000) $1,151 Avg Close $176.11 Range $151.50 - $202.76

Q4 2022

Shares 6,664 Value ($000) $1,108 Avg Close $153.87 Range $112.11 - $186.80

Q3 2022

Shares 6,519 Value ($000) $918 Avg Close $178.97 Range $133.61 - $212.24

Q2 2022

Shares 6,624 Value ($000) $1,351 Avg Close $214.62 Range $174.88 - $258.13

Q1 2022

Shares 6,564 Value ($000) $1,673 Avg Close $266.04 Range $239.75 - $326.08

Q4 2021

Shares 7,108 Value ($000) $2,332 Avg Close $307.32 Range $285.14 - $326.54

Q3 2021

Shares 6,899 Value ($000) $2,086 Avg Close $278.11 Range $257.33 - $318.62

Q2 2021

Shares 6,762 Value ($000) $1,834 Avg Close $248.03 Range $227.68 - $268.74

Q1 2021

Shares 7,142 Value ($000) $1,739 Avg Close $268.89 Range $231.88 - $300.91

Q4 2020

Shares 7,167 Value ($000) $2,054 Avg Close $268.73 Range $247.92 - $285.33

Q3 2020

Shares 7,167 Value ($000) $1,826 Avg Close $231.93 Range $202.54 - $252.24

Q2 2020

Shares 6,037 Value ($000) $1,309 Avg Close $224.85 Range $197.47 - $262.51

Q1 2020

Shares 6,037 Value ($000) $1,365 Avg Close $240.43 Range $177.40 - $264.58

Q4 2019

Shares 6,105 Value ($000) $1,523 Avg Close $228.21 Range $201.87 - $248.54

Q3 2019

Shares 5,981 Value ($000) $1,422 Avg Close $225.06 Range $200.11 - $261.29

Q2 2019

Shares 5,253 Value ($000) $1,284 Avg Close $226.56 Range $176.37 - $256.07

Q1 2019

Shares 5,150 Value ($000) $1,187 Avg Close $219.75 Range $195.71 - $235.22

Q4 2018

Shares 5,268 Value ($000) $1,098 Avg Close $189.46 Range $162.53 - $218.23

Q3 2018

Shares 5,121 Value ($000) $951 Avg Close $195.39 Range $165.11 - $218.31

Q2 2018

Shares 5,059 Value ($000) $1,068 Avg Close $169.69 Range $134.32 - $207.68

Q1 2018

Shares 5,009 Value ($000) $744 Avg Close $132.07 Range $118.48 - $150.10

Q4 2017

Shares 5,118 Value ($000) $636 Avg Close $135.32 Range $118.50 - $157.82

Q3 2017

Shares 5,202 Value ($000) $777 Avg Close $136.33 Range $123.49 - $150.04

Q2 2017

Shares 5,692 Value ($000) $816 Avg Close $137.24 Range $116.47 - $164.05

Q1 2017

Shares 5,892 Value ($000) $723 Avg Close $118.09 Range $109.46 - $123.38

Q4 2016

Shares 6,192 Value ($000) $760 Avg Close $120.22 Range $105.07 - $132.08

Q3 2016

Shares 6,392 Value ($000) $731 Avg Close $109.60 Range $98.18 - $123.04

Q2 2016

Shares 6,292 Value ($000) $774 Avg Close $103.44 Range $88.28 - $126.77

Q1 2016

Shares 6,168 Value ($000) $594 Avg Close $86.42 Range $73.77 - $101.55

Q4 2015

Shares 5,394 Value ($000) $537 Avg Close $102.36 Range $85.94 - $114.35

Q3 2015

Shares 5,275 Value ($000) $588 Avg Close $100.98 Range $82.67 - $120.40

Q2 2015

Shares 5,275 Value ($000) $469 Avg Close $80.63 Range $64.55 - $88.64

Q1 2015

Shares 5,053 Value ($000) $365 Avg Close $70.91 Range $65.28 - $76.95

Q4 2014

Shares 5,153 Value ($000) $398 Avg Close $69.59 Range $54.13 - $80.65

Q3 2014

Shares 5,131 Value ($000) $296 Avg Close $68.77 Range $51.84 - $82.01

Q2 2014

Shares 5,102 Value ($000) $428 Avg Close $78.24 Range $70.63 - $86.28

Q1 2014

Shares 4,802 Value ($000) $433 Avg Close $80.28 Range $67.42 - $90.75

Q4 2013

Shares 4,802 Value ($000) $377 Avg Close $68.72 Range $61.20 - $78.13

Q3 2013

Shares 4,802 Value ($000) $325 Avg Close $60.15 Range $50.50 - $68.22

Q2 2013

Shares 4,602 Value ($000) $249 Avg Close $48.72 Range $43.39 - $52.49

Q1 2013

Shares 4,502 Value ($000) $239 Avg Close $49.57 Range $46.18 - $53.45

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	323	$25	$75.96	$66.39 - $83.18
Q3 2025	382	$26	$71.72	$55.21 - $103.28
Q2 2025	5,041	$475	$109.15	$87.42 - $130.43
Q1 2025	5,041	$598	$135.40	$114.00 - $154.03
Q4 2024	5,041	$665	$121.79	$97.08 - $139.36
Q3 2024	5,095	$662	$116.53	$85.22 - $139.82
Q2 2024	5,251	$456	$103.60	$82.88 - $122.43
Q1 2024	5,367	$589	$99.55	$87.54 - $114.48
Q4 2023	5,647	$592	$96.12	$81.68 - $118.22
Q3 2023	5,894	$619	$126.18	$101.78 - $143.38
Q2 2023	6,420	$825	$149.94	$122.07 - $184.65
Q1 2023	6,585	$1,151	$176.11	$151.50 - $202.76
Q4 2022	6,664	$1,108	$153.87	$112.11 - $186.80
Q3 2022	6,519	$918	$178.97	$133.61 - $212.24
Q2 2022	6,624	$1,351	$214.62	$174.88 - $258.13
Q1 2022	6,564	$1,673	$266.04	$239.75 - $326.08
Q4 2021	7,108	$2,332	$307.32	$285.14 - $326.54
Q3 2021	6,899	$2,086	$278.11	$257.33 - $318.62
Q2 2021	6,762	$1,834	$248.03	$227.68 - $268.74
Q1 2021	7,142	$1,739	$268.89	$231.88 - $300.91
Q4 2020	7,167	$2,054	$268.73	$247.92 - $285.33
Q3 2020	7,167	$1,826	$231.93	$202.54 - $252.24
Q2 2020	6,037	$1,309	$224.85	$197.47 - $262.51
Q1 2020	6,037	$1,365	$240.43	$177.40 - $264.58
Q4 2019	6,105	$1,523	$228.21	$201.87 - $248.54
Q3 2019	5,981	$1,422	$225.06	$200.11 - $261.29
Q2 2019	5,253	$1,284	$226.56	$176.37 - $256.07
Q1 2019	5,150	$1,187	$219.75	$195.71 - $235.22
Q4 2018	5,268	$1,098	$189.46	$162.53 - $218.23
Q3 2018	5,121	$951	$195.39	$165.11 - $218.31
Q2 2018	5,059	$1,068	$169.69	$134.32 - $207.68
Q1 2018	5,009	$744	$132.07	$118.48 - $150.10
Q4 2017	5,118	$636	$135.32	$118.50 - $157.82
Q3 2017	5,202	$777	$136.33	$123.49 - $150.04
Q2 2017	5,692	$816	$137.24	$116.47 - $164.05
Q1 2017	5,892	$723	$118.09	$109.46 - $123.38
Q4 2016	6,192	$760	$120.22	$105.07 - $132.08
Q3 2016	6,392	$731	$109.60	$98.18 - $123.04
Q2 2016	6,292	$774	$103.44	$88.28 - $126.77
Q1 2016	6,168	$594	$86.42	$73.77 - $101.55
Q4 2015	5,394	$537	$102.36	$85.94 - $114.35
Q3 2015	5,275	$588	$100.98	$82.67 - $120.40
Q2 2015	5,275	$469	$80.63	$64.55 - $88.64
Q1 2015	5,053	$365	$70.91	$65.28 - $76.95
Q4 2014	5,153	$398	$69.59	$54.13 - $80.65
Q3 2014	5,131	$296	$68.77	$51.84 - $82.01
Q2 2014	5,102	$428	$78.24	$70.63 - $86.28
Q1 2014	4,802	$433	$80.28	$67.42 - $90.75
Q4 2013	4,802	$377	$68.72	$61.20 - $78.13
Q3 2013	4,802	$325	$60.15	$50.50 - $68.22
Q2 2013	4,602	$249	$48.72	$43.39 - $52.49
Q1 2013	4,502	$239	$49.57	$46.18 - $53.45