MESA LABS INC

Ticker: MLAB CUSIP: 59064R109 Class: Common Stock

DIMENSIONAL FUND ADVISORS LP's Holding History (CIK: 0000354204)

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

Q4 2025

Shares 116,363 Value ($000) $9,135 Avg Close $75.96 Range $66.39 - $83.18

Q3 2025

Shares 116,772 Value ($000) $7,823 Avg Close $71.72 Range $55.21 - $103.28

Q2 2025

Shares 115,284 Value ($000) $10,864 Avg Close $109.15 Range $87.42 - $130.43

Q1 2025

Shares 111,247 Value ($000) $13,201 Avg Close $135.40 Range $114.00 - $154.03

Q4 2024

Shares 113,850 Value ($000) $15,013 Avg Close $121.79 Range $97.08 - $139.36

Q3 2024

Shares 123,573 Value ($000) $16,047 Avg Close $116.53 Range $85.22 - $139.82

Q2 2024

Shares 131,891 Value ($000) $11,444 Avg Close $103.60 Range $82.88 - $122.43

Q1 2024

Shares 123,169 Value ($000) $13,515 Avg Close $99.55 Range $87.54 - $114.48

Q4 2023

Shares 127,235 Value ($000) $13,331 Avg Close $96.12 Range $81.68 - $118.22

Q3 2023

Shares 127,999 Value ($000) $13,449 Avg Close $126.18 Range $101.78 - $143.38

Q2 2023

Shares 131,057 Value ($000) $16,842 Avg Close $149.94 Range $122.07 - $184.65

Q1 2023

Shares 106,812 Value ($000) $18,663 Avg Close $176.11 Range $151.50 - $202.76

Q4 2022

Shares 78,426 Value ($000) $13 Avg Close $153.87 Range $112.11 - $186.80

Q3 2022

Shares 73,055 Value ($000) $10,288 Avg Close $178.97 Range $133.61 - $212.24

Q2 2022

Shares 70,598 Value ($000) $14,397 Avg Close $214.62 Range $174.88 - $258.13

Q1 2022

Shares 61,393 Value ($000) $15,648 Avg Close $266.04 Range $239.75 - $326.08

Q4 2021

Shares 57,988 Value ($000) $19,026 Avg Close $307.32 Range $285.14 - $326.54

Q3 2021

Shares 45,094 Value ($000) $13,635 Avg Close $278.11 Range $257.33 - $318.62

Q2 2021

Shares 24,312 Value ($000) $6,593 Avg Close $248.03 Range $227.68 - $268.74

Q1 2021

Shares 19,557 Value ($000) $4,762 Avg Close $268.89 Range $231.88 - $300.91

Q4 2020

Shares 4,637 Value ($000) $1,329 Avg Close $268.73 Range $247.92 - $285.33

Q3 2020

Shares 21,195 Value ($000) $5,400 Avg Close $231.93 Range $202.54 - $252.24

Q2 2020

Shares 64,103 Value ($000) $13,898 Avg Close $224.85 Range $197.47 - $262.51

Q1 2020

Shares 95,814 Value ($000) $21,663 Avg Close $240.43 Range $177.40 - $264.58

Q4 2019

Shares 121,872 Value ($000) $30,395 Avg Close $228.21 Range $201.87 - $248.54

Q3 2019

Shares 138,188 Value ($000) $32,856 Avg Close $225.06 Range $200.11 - $261.29

Q2 2019

Shares 138,354 Value ($000) $33,804 Avg Close $226.56 Range $176.37 - $256.07

Q1 2019

Shares 138,862 Value ($000) $32,009 Avg Close $219.75 Range $195.71 - $235.22

Q4 2018

Shares 140,607 Value ($000) $29,301 Avg Close $189.46 Range $162.53 - $218.23

Q3 2018

Shares 138,697 Value ($000) $25,745 Avg Close $195.39 Range $165.11 - $218.31

Q2 2018

Shares 133,567 Value ($000) $28,192 Avg Close $169.69 Range $134.32 - $207.68

Q1 2018

Shares 134,053 Value ($000) $19,899 Avg Close $132.07 Range $118.48 - $150.10

Q4 2017

Shares 134,152 Value ($000) $16,675 Avg Close $135.32 Range $118.50 - $157.82

Q3 2017

Shares 128,657 Value ($000) $19,211 Avg Close $136.33 Range $123.49 - $150.04

Q2 2017

Shares 129,320 Value ($000) $18,532 Avg Close $137.24 Range $116.47 - $164.05

Q1 2017

Shares 124,686 Value ($000) $15,299 Avg Close $118.09 Range $109.46 - $123.38

Q4 2016

Shares 119,228 Value ($000) $14,635 Avg Close $120.22 Range $105.07 - $132.08

Q3 2016

Shares 113,802 Value ($000) $13,014 Avg Close $109.60 Range $98.18 - $123.04

Q2 2016

Shares 115,467 Value ($000) $14,202 Avg Close $103.44 Range $88.28 - $126.77

Q1 2016

Shares 111,557 Value ($000) $10,749 Avg Close $86.42 Range $73.77 - $101.55

Q4 2015

Shares 109,440 Value ($000) $10,889 Avg Close $102.36 Range $85.94 - $114.35

Q3 2015

Shares 106,838 Value ($000) $11,902 Avg Close $100.98 Range $82.67 - $120.40

Q2 2015

Shares 106,545 Value ($000) $9,472 Avg Close $80.63 Range $64.55 - $88.64

Q1 2015

Shares 107,803 Value ($000) $7,783 Avg Close $70.91 Range $65.28 - $76.95

Q4 2014

Shares 105,808 Value ($000) $8,180 Avg Close $69.59 Range $54.13 - $80.65

Q3 2014

Shares 104,635 Value ($000) $6,046 Avg Close $68.77 Range $51.84 - $82.01

Q2 2014

Shares 105,269 Value ($000) $8,838 Avg Close $78.24 Range $70.63 - $86.28

Q1 2014

Shares 102,355 Value ($000) $9,238 Avg Close $80.28 Range $67.42 - $90.75

Q4 2013

Shares 99,410 Value ($000) $7,812 Avg Close $68.72 Range $61.20 - $78.13

Q3 2013

Shares 94,866 Value ($000) $6,414 Avg Close $60.15 Range $50.50 - $68.22

Q2 2013

Shares 96,230 Value ($000) $5,209 Avg Close $48.72 Range $43.39 - $52.49

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	116,363	$9,135	$75.96	$66.39 - $83.18
Q3 2025	116,772	$7,823	$71.72	$55.21 - $103.28
Q2 2025	115,284	$10,864	$109.15	$87.42 - $130.43
Q1 2025	111,247	$13,201	$135.40	$114.00 - $154.03
Q4 2024	113,850	$15,013	$121.79	$97.08 - $139.36
Q3 2024	123,573	$16,047	$116.53	$85.22 - $139.82
Q2 2024	131,891	$11,444	$103.60	$82.88 - $122.43
Q1 2024	123,169	$13,515	$99.55	$87.54 - $114.48
Q4 2023	127,235	$13,331	$96.12	$81.68 - $118.22
Q3 2023	127,999	$13,449	$126.18	$101.78 - $143.38
Q2 2023	131,057	$16,842	$149.94	$122.07 - $184.65
Q1 2023	106,812	$18,663	$176.11	$151.50 - $202.76
Q4 2022	78,426	$13	$153.87	$112.11 - $186.80
Q3 2022	73,055	$10,288	$178.97	$133.61 - $212.24
Q2 2022	70,598	$14,397	$214.62	$174.88 - $258.13
Q1 2022	61,393	$15,648	$266.04	$239.75 - $326.08
Q4 2021	57,988	$19,026	$307.32	$285.14 - $326.54
Q3 2021	45,094	$13,635	$278.11	$257.33 - $318.62
Q2 2021	24,312	$6,593	$248.03	$227.68 - $268.74
Q1 2021	19,557	$4,762	$268.89	$231.88 - $300.91
Q4 2020	4,637	$1,329	$268.73	$247.92 - $285.33
Q3 2020	21,195	$5,400	$231.93	$202.54 - $252.24
Q2 2020	64,103	$13,898	$224.85	$197.47 - $262.51
Q1 2020	95,814	$21,663	$240.43	$177.40 - $264.58
Q4 2019	121,872	$30,395	$228.21	$201.87 - $248.54
Q3 2019	138,188	$32,856	$225.06	$200.11 - $261.29
Q2 2019	138,354	$33,804	$226.56	$176.37 - $256.07
Q1 2019	138,862	$32,009	$219.75	$195.71 - $235.22
Q4 2018	140,607	$29,301	$189.46	$162.53 - $218.23
Q3 2018	138,697	$25,745	$195.39	$165.11 - $218.31
Q2 2018	133,567	$28,192	$169.69	$134.32 - $207.68
Q1 2018	134,053	$19,899	$132.07	$118.48 - $150.10
Q4 2017	134,152	$16,675	$135.32	$118.50 - $157.82
Q3 2017	128,657	$19,211	$136.33	$123.49 - $150.04
Q2 2017	129,320	$18,532	$137.24	$116.47 - $164.05
Q1 2017	124,686	$15,299	$118.09	$109.46 - $123.38
Q4 2016	119,228	$14,635	$120.22	$105.07 - $132.08
Q3 2016	113,802	$13,014	$109.60	$98.18 - $123.04
Q2 2016	115,467	$14,202	$103.44	$88.28 - $126.77
Q1 2016	111,557	$10,749	$86.42	$73.77 - $101.55
Q4 2015	109,440	$10,889	$102.36	$85.94 - $114.35
Q3 2015	106,838	$11,902	$100.98	$82.67 - $120.40
Q2 2015	106,545	$9,472	$80.63	$64.55 - $88.64
Q1 2015	107,803	$7,783	$70.91	$65.28 - $76.95
Q4 2014	105,808	$8,180	$69.59	$54.13 - $80.65
Q3 2014	104,635	$6,046	$68.77	$51.84 - $82.01
Q2 2014	105,269	$8,838	$78.24	$70.63 - $86.28
Q1 2014	102,355	$9,238	$80.28	$67.42 - $90.75
Q4 2013	99,410	$7,812	$68.72	$61.20 - $78.13
Q3 2013	94,866	$6,414	$60.15	$50.50 - $68.22
Q2 2013	96,230	$5,209	$48.72	$43.39 - $52.49