Insider trading activities (stock purchases, sales, and option exercises) reported by insiders of Mesa Laboratories Inc /co/ (MLAB) since 2009 are shown in Table 1 and Table 2. Table 1 shows the monthly insider trading data of Mesa Laboratories Inc /co/. Table 2 shows the detailed insider transactions. This company's CIK number is 724004.
Total stock buying since 2009: $2,404,031.
Total stock sales since 2009: $75,937,194.
Total stock option exercises since 2009: $20,115,077.
| Insider Buying | Insider Sales | Option Exercises | ||||
|---|---|---|---|---|---|---|
| Year | Shares | Value | Shares | Value | Shares | Value |
| 2025 | 0 | $0 | 24,053 | $2,898,609 | 55,502 | $4,390,458 |
| 2024 | 0 | $0 | 6,568 | $759,110 | 18,929 | $0 |
| 2023 | 0 | $0 | 42,199 | $7,675,388 | 46,009 | $2,545,738 |
| 2022 | 0 | $0 | 24,903 | $5,422,110 | 67,079 | $3,364,585 |
| 2021 | 0 | $0 | 67,906 | $18,834,841 | 44,555 | $3,421,940 |
| 2020 | 0 | $0 | 39,844 | $10,484,823 | 33,033 | $2,052,633 |
| 2019 | 0 | $0 | 28,384 | $6,738,443 | 30,902 | $1,525,950 |
| 2018 | 0 | $0 | 51,089 | $9,685,748 | 23,420 | $600,571 |
| 2017 | 0 | $0 | 64,830 | $8,427,579 | 26,070 | $571,505 |
| 2016 | 0 | $0 | 30,284 | $3,379,612 | 10,426 | $452,469 |
| 2015 | 150 | $16,431 | 14,337 | $1,630,931 | 32,513 | $1,189,228 |
| 2011 | 10,000 | $290,000 | 0 | $0 | 0 | $0 |
| 2010 | 70,000 | $1,635,600 | 0 | $0 | 0 | $0 |
| 2009 | 20,000 | $462,000 | 0 | $0 | 0 | $0 |
| Trading Period | Insider Buying | Insider Sales | Option Exercises | |||
|---|---|---|---|---|---|---|
| year-month | Shares | Value | Shares | Value | Shares | Value |
| 2025-08 | 0 | $0 | 0 | $0 | 8,969 | $0 |
| 2025-06 | 0 | $0 | 3,053 | $296,499 | 25,533 | $1,807,878 |
| 2025-03 | 0 | $0 | 21,000 | $2,602,110 | 21,000 | $2,582,580 |
| 2024-10 | 0 | $0 | 5,069 | $571,735 | 0 | $0 |
| 2024-09 | 0 | $0 | 1,499 | $187,375 | 11,053 | $0 |
| 2024-08 | 0 | $0 | 0 | $0 | 724 | $0 |
| 2024-06 | 0 | $0 | 0 | $0 | 7,152 | $0 |
| 2023-12 | 0 | $0 | 1,500 | $168,540 | 0 | $0 |
| 2023-09 | 0 | $0 | 9,000 | $1,148,496 | 2,000 | $272,840 |
| 2023-08 | 0 | $0 | 0 | $0 | 5,256 | $0 |
| 2023-06 | 0 | $0 | 0 | $0 | 8,625 | $0 |
| 2023-03 | 0 | $0 | 6,028 | $1,018,145 | 6,028 | $591,112 |
| 2023-02 | 0 | $0 | 1,000 | $184,270 | 1,000 | $51,850 |
| 2023-01 | 0 | $0 | 24,671 | $5,155,937 | 23,100 | $1,629,936 |
| 2022-12 | 0 | $0 | 230 | $40,244 | 0 | $0 |
| 2022-11 | 0 | $0 | 2,500 | $438,625 | 0 | $0 |
| 2022-09 | 0 | $0 | 0 | $0 | 25,435 | $0 |
| 2022-08 | 0 | $0 | 5,692 | $1,125,209 | 5,085 | $440,938 |
| 2022-07 | 0 | $0 | 0 | $0 | 18,576 | $1,794,627 |
| 2022-06 | 0 | $0 | 8,617 | $1,723,354 | 9,119 | $436,977 |
| 2022-04 | 0 | $0 | 72 | $18,031 | 72 | $3,733 |
| 2022-03 | 0 | $0 | 1,600 | $401,969 | 1,600 | $82,960 |
| 2022-02 | 0 | $0 | 5,192 | $1,346,908 | 6,192 | $507,570 |
| 2022-01 | 0 | $0 | 1,000 | $327,770 | 1,000 | $97,780 |
| Trade Date | Insider Name | Trade Type | Shares | Price ($) | Value ($) |
|---|---|---|---|---|---|
| 2025-08-15 | Alltoft Jennifer Sadie (Director) | Option Ex | 1,404 | .00 | 0 |
| 2025-08-15 | Ladiwala Shiraz Shabanali (Director) | Option Ex | 1,949 | .00 | 0 |
| 2025-08-15 | Hall Shannon (Director) | Option Ex | 1,404 | .00 | 0 |
| 2025-08-15 | Capone Mark Christopher (Director) | Option Ex | 1,404 | .00 | 0 |
| 2025-08-15 | Tripeny R Tony (Director) | Option Ex | 1,404 | .00 | 0 |
| 2025-08-15 | Sullivan John James (Director) | Option Ex | 1,404 | .00 | 0 |
| 2025-06-21 | Archbold Brian David (SVP Operations) | Option Ex | 844 | 95.82 | 80,872 |
| 2025-06-21 | Owens Gary M (President and CEO) | Option Ex | 3,301 | 95.82 | 316,301 |
| 2025-06-21 | Sakys John (CFO) | Option Ex | 1,036 | 95.82 | 99,269 |
| 2025-06-18 | Archbold Brian David (SVP Operations) | Option Ex | 2,556 | 92.99 | 237,682 |
| 2025-06-18 | Owens Gary M (President and CEO) | Option Ex | 8,707 | 92.99 | 809,663 |
| 2025-06-18 | Sakys John (CFO) | Option Ex | 2,840 | 92.99 | 264,091 |
| 2025-06-16 | Archbold Brian David (SVP Operations) | Sale | 472 | 97.12 | 45,839 |
| 2025-06-16 | Owens Gary M (President and CEO) | Sale | 1,939 | 97.12 | 188,311 |
| 2025-06-16 | Sakys John (CFO) | Sale | 642 | 97.12 | 62,349 |
| 2025-06-15 | Archbold Brian David (SVP Operations) | Option Ex | 1,030 | .00 | 0 |
| 2025-06-15 | Owens Gary M (President and CEO) | Option Ex | 4,426 | .00 | 0 |
| 2025-06-15 | Sakys John (CFO) | Option Ex | 793 | .00 | 0 |
| 2025-03-19 | Owens Gary M (President and CEO) | Sale | 21,000 | 123.91 | 2,602,110 |
| 2025-03-19 | Owens Gary M (President and CEO) | Option Ex | 21,000 | 122.98 | 2,582,580 |
| 2024-10-29 | Owens Gary M (President and CEO) | Sale | 2,551 | 111.98 | 285,650 |
| 2024-10-28 | Owens Gary M (President and CEO) | Sale | 2,518 | 113.62 | 286,085 |
| 2024-09-13 | Archbold Brian David (SVP Operations) | Sale | 1,499 | 125.00 | 187,375 |
| 2024-09-01 | Archbold Brian David (SVP Operations) | Option Ex | 845 | .00 | 0 |
| 2024-09-01 | Alltoft Jennifer Sadie (Director) | Option Ex | 1,074 | .00 | 0 |
| 2024-09-01 | Ladiwala Shiraz Shabanali (Director) | Option Ex | 1,574 | .00 | 0 |
| 2024-09-01 | Owens Gary M (President and CEO) | Option Ex | 3,301 | .00 | 0 |
| 2024-09-01 | Hall Shannon (Director) | Option Ex | 1,074 | .00 | 0 |
| 2024-09-01 | Tripeny R Tony (Director) | Option Ex | 1,074 | .00 | 0 |
| 2024-09-01 | Sullivan John James (Director) | Option Ex | 1,074 | .00 | 0 |
| 2024-09-01 | Sakys John (CFO) | Option Ex | 1,037 | .00 | 0 |
| 2024-08-15 | Capone Mark Christopher (Director) | Option Ex | 724 | .00 | 0 |
| 2024-06-14 | Archbold Brian David (SVP Operations) | Option Ex | 889 | .00 | 0 |
| 2024-06-14 | Owens Gary M (President and CEO) | Option Ex | 4,959 | .00 | 0 |
| 2024-06-14 | Sakys John (CFO) | Option Ex | 1,304 | .00 | 0 |
| 2023-12-15 | Archbold Brian David (SVP Operations) | Sale | 1,500 | 112.36 | 168,540 |
| 2023-09-15 | Schmieder John Bradley (Director) | Sale | 1,000 | 123.74 | 123,740 |
| 2023-09-14 | Schmieder John Bradley (Director) | Sale | 3,000 | 123.05 | 369,150 |
| 2023-09-13 | Schmieder John Bradley (Director) | Sale | 3,000 | 123.32 | 369,966 |
| 2023-09-01 | Owens Gary M (President and CEO) | Sale | 2,000 | 142.82 | 285,640 |
| 2023-09-01 | Owens Gary M (President and CEO) | Option Ex | 2,000 | 136.42 | 272,840 |
| 2023-08-15 | Alltoft Jennifer Sadie (Director) | Option Ex | 754 | .00 | 0 |
| 2023-08-15 | Ladiwala Shiraz Shabanali (Director) | Option Ex | 1,095 | .00 | 0 |
| 2023-08-15 | Schmieder John Bradley (Director) | Option Ex | 754 | .00 | 0 |
| 2023-08-15 | Hall Shannon (Director) | Option Ex | 754 | .00 | 0 |
| 2023-08-15 | Tripeny R Tony (Director) | Option Ex | 1,105 | .00 | 0 |
| 2023-08-15 | Sullivan John James (Director) | Option Ex | 754 | .00 | 0 |
| 2023-06-16 | Archbold Brian David (SVP Operations) | Option Ex | 612 | .00 | 0 |
| 2023-06-16 | Owens Gary M (President and CEO) | Option Ex | 2,820 | .00 | 0 |
| 2023-06-16 | Sullivan John James (Director) | Option Ex | 15 | .00 | 0 |
| 2023-06-16 | Sakys John (CFO) | Option Ex | 848 | .00 | 0 |
| 2023-06-15 | Archbold Brian David (SVP Operations) | Option Ex | 614 | .00 | 0 |
| 2023-06-15 | Owens Gary M (CEO) | Option Ex | 2,823 | .00 | 0 |
| 2023-06-15 | Schmieder John Bradley (Director) | Option Ex | 30 | .00 | 0 |
| 2023-06-15 | Sullivan John James (Director) | Option Ex | 15 | .00 | 0 |
| 2023-06-15 | Sakys John (CFO) | Option Ex | 848 | .00 | 0 |
| 2023-03-24 | Sakys John (CFO) | Sale | 2,128 | 167.01 | 355,397 |
| 2023-03-24 | Sakys John (CFO) | Option Ex | 2,128 | 87.25 | 185,678 |
| 2023-03-22 | Sakys John (CFO) | Sale | 2,500 | 171.62 | 429,050 |
| 2023-03-22 | Sakys John (CFO) | Option Ex | 2,500 | 122.66 | 306,650 |
| 2023-03-15 | Sakys John (CFO) | Sale | 1,000 | 165.71 | 165,710 |
| 2023-03-15 | Sakys John (CFO) | Option Ex | 1,000 | 70.56 | 70,560 |
| 2023-03-09 | Sakys John (CFO) | Sale | 400 | 169.97 | 67,988 |
| 2023-03-09 | Sakys John (CFO) | Option Ex | 400 | 70.56 | 28,224 |
| 2023-02-09 | Sakys John (CFO) | Sale | 1,000 | 184.27 | 184,270 |
| 2023-02-09 | Sakys John (CFO) | Option Ex | 1,000 | 51.85 | 51,850 |
| 2023-01-23 | Sakys John (CFO) | Sale | 12,600 | 210.19 | 2,648,394 |
| 2023-01-23 | Sakys John (CFO) | Option Ex | 12,600 | 70.56 | 889,056 |
| 2023-01-13 | Schmieder John Bradley (Director) | Sale | 1,571 | 191.31 | 300,548 |
| 2022-12-08 | Hall Shannon (Director) | Sale | 230 | 174.97 | 40,244 |
| 2022-11-11 | Schmieder John Bradley (Director) | Sale | 2,500 | 175.45 | 438,625 |
| 2022-09-01 | Archbold Brian David (VP Operations) | Option Ex | 903 | .00 | 0 |
| 2022-09-01 | Alltoft Jennifer Sadie (Director) | Option Ex | 431 | .00 | 0 |
| 2022-09-01 | Owens Gary M (President and CEO) | Option Ex | 5,668 | .00 | 0 |
| 2022-09-01 | Schmieder John Bradley (Director) | Option Ex | 431 | .00 | 0 |
| 2022-09-01 | Hall Shannon (Director) | Option Ex | 431 | .00 | 0 |
| 2022-09-01 | Sullivan John James (Director) | Option Ex | 787 | .00 | 0 |
| 2022-09-01 | Guillemin Evan (Director) | Option Ex | 431 | .00 | 0 |
| 2022-09-01 | Sakys John (CFO) | Option Ex | 9,085 | .00 | 0 |
| 2022-08-18 | Guillemin Evan (Director) | Sale | 3,692 | 196.12 | 724,075 |
| 2022-08-18 | Guillemin Evan (Director) | Option Ex | 2,680 | 111.87 | 299,819 |
| 2022-08-16 | Sakys John (CFO) | Sale | 1,372 | 200.58 | 275,195 |
| 2022-08-16 | Sakys John (CFO) | Option Ex | 1,372 | 70.56 | 96,808 |
| 2022-08-15 | Ladiwala Shiraz Shabanali (Director) | Option Ex | 405 | .00 | 0 |
| 2022-08-15 | Sakys John (CFO) | Sale | 628 | 200.54 | 125,939 |
| 2022-08-15 | Sakys John (CFO) | Option Ex | 628 | 70.56 | 44,311 |
| 2022-07-05 | Sullivan John James (Director) | Option Ex | 18,576 | 96.61 | 1,794,627 |
| 2022-06-21 | Archbold Brian David (SVP Operations) | Sale | 392 | 188.22 | 73,783 |
| 2022-06-21 | Owens Gary M (President and CEO) | Sale | 1,756 | 188.22 | 330,521 |
| 2022-06-21 | Dinoia Gregory (SVP Commercial) | Sale | 555 | 188.22 | 104,464 |
| 2022-06-21 | Sakys John (CFO) | Sale | 722 | 188.22 | 135,897 |
| 2022-06-17 | Archbold Brian David (SVP Operations) | Option Ex | 338 | .00 | 0 |
| 2022-06-17 | Owens Gary M (President and CEO) | Option Ex | 1,685 | .00 | 0 |
| 2022-06-17 | Dinoia Gregory (SVP Commercial) | Option Ex | 391 | .00 | 0 |
| 2022-06-17 | Sakys John (CFO) | Option Ex | 392 | .00 | 0 |
| 2022-06-15 | Schmieder John Bradley (Director) | Option Ex | 30 | .00 | 0 |
| 2022-06-15 | Sullivan John James (Director) | Option Ex | 30 | .00 | 0 |
| 2022-06-15 | Guillemin Evan (Director) | Option Ex | 30 | .00 | 0 |
| 2022-06-15 | Mesa Laboratories Inc /co/ (Director) | Option Ex | 30 | .00 | 0 |
| 2022-06-09 | Sullivan John James (Director) | Option Ex | 1,001 | 70.56 | 70,630 |
| 2022-06-07 | Sullivan John James (Director) | Sale | 5,192 | 207.76 | 1,078,689 |
| 2022-06-07 | Sullivan John James (Director) | Option Ex | 5,192 | 70.56 | 366,347 |
| 2022-04-20 | Sakys John (CFO) | Sale | 72 | 250.44 | 18,031 |
| 2022-04-20 | Sakys John (CFO) | Option Ex | 72 | 51.85 | 3,733 |
| 2022-03-24 | Sakys John (CFO) | Sale | 670 | 251.15 | 168,270 |
| 2022-03-23 | Sakys John (CFO) | Sale | 930 | 251.29 | 233,699 |
| 2022-03-23 | Sakys John (CFO) | Option Ex | 1,600 | 51.85 | 82,960 |
| 2022-02-17 | Sullivan John James (Director) | Option Ex | 1,000 | 70.56 | 70,560 |
| 2022-02-15 | Sullivan John James (Director) | Sale | 5,192 | 259.42 | 1,346,908 |
| 2022-02-15 | Sullivan John James (Director) | Option Ex | 5,192 | 84.17 | 437,010 |
| 2022-01-03 | Schmieder John Bradley (Director) | Sale | 1,000 | 327.77 | 327,770 |
| 2022-01-03 | Schmieder John Bradley (Director) | Option Ex | 1,000 | 97.78 | 97,780 |
| 2021-12-14 | Archbold Brian David (SVP Operations) | Sale | 1,659 | 325.02 | 539,208 |
| 2021-12-14 | Archbold Brian David (SVP Operations) | Option Ex | 1,659 | 190.89 | 316,681 |
| 2021-12-10 | Sakys John (CFO) | Sale | 1,758 | 324.74 | 570,892 |
| 2021-12-10 | Sakys John (CFO) | Option Ex | 1,758 | 93.74 | 164,794 |
| 2021-12-02 | Guillemin Evan (Director) | Sale | 2,320 | 310.61 | 720,615 |
| 2021-12-02 | Guillemin Evan (Director) | Option Ex | 2,320 | 82.00 | 190,233 |
| 2021-11-17 | Sullivan John James (Director) | Option Ex | 1,000 | 70.56 | 70,560 |
| 2021-11-15 | Sullivan John James (Director) | Sale | 5,192 | 308.02 | 1,599,239 |
| 2021-11-15 | Sullivan John James (Director) | Option Ex | 5,192 | 93.74 | 486,698 |
| 2021-11-11 | Sakys John (CFO) | Sale | 1,000 | 317.12 | 317,120 |
| 2021-11-11 | Sakys John (CFO) | Option Ex | 1,000 | 97.78 | 97,780 |
| 2021-11-08 | Dinoia Gregory (SVP Commercial) | Sale | 280 | 323.72 | 90,641 |
| 2021-11-08 | Kelly David M (Director) | Sale | 18 | 324.07 | 5,833 |
| 2021-11-08 | Kelly David M (Director) | Option Ex | 18 | 58.51 | 1,053 |
| 2021-10-20 | Sakys John (CFO) | Sale | 2,000 | 309.86 | 619,720 |
| 2021-10-20 | Sakys John (CFO) | Option Ex | 2,000 | 97.78 | 195,560 |
| 2021-10-01 | Sullivan John James (Director) | Sale | 1,250 | 304.48 | 380,600 |
| 2021-09-10 | Sakys John (CFO) | Sale | 1,400 | 270.21 | 378,294 |
| 2021-09-10 | Sakys John (CFO) | Option Ex | 1,400 | 89.70 | 125,580 |
| 2021-09-01 | Sullivan John James (Director) | Sale | 1,250 | 268.22 | 335,275 |
| 2021-08-31 | Kelly David M (Director) | Sale | 603 | 267.29 | 161,175 |
| 2021-08-18 | Sullivan John James (Director) | Option Ex | 1,000 | 70.56 | 70,560 |
| 2021-08-16 | Sullivan John James (Director) | Sale | 5,192 | 272.16 | 1,413,054 |
| 2021-08-16 | Sullivan John James (Director) | Option Ex | 5,192 | 89.70 | 465,722 |
| 2021-08-15 | Alltoft Jennifer Sadie (Director) | Option Ex | 308 | .00 | 0 |
| 2021-08-15 | Schmieder John Bradley (Director) | Option Ex | 308 | .00 | 0 |
| 2021-08-15 | Hall Shannon (Director) | Option Ex | 308 | .00 | 0 |
| 2021-08-15 | Sullivan John James (Director) | Option Ex | 308 | .00 | 0 |
| 2021-08-15 | Guillemin Evan (Director) | Option Ex | 308 | .00 | 0 |
| 2021-08-15 | Kelly David M (Director) | Option Ex | 308 | .00 | 0 |
| 2021-08-12 | Sakys John (CFO) | Sale | 1,000 | 275.16 | 275,160 |
| 2021-08-12 | Sakys John (CFO) | Option Ex | 1,000 | 89.70 | 89,700 |
| 2021-08-11 | Schmieder John Bradley (Director) | Sale | 800 | 278.06 | 222,448 |
| 2021-08-09 | Archbold Brian David (SVP Continuous Improvement) | Sale | 639 | 280.03 | 178,939 |
| 2021-08-02 | Sullivan John James (Director) | Sale | 1,250 | 290.47 | 363,087 |
| 2021-07-16 | Guillemin Evan (Director) | Sale | 720 | 282.18 | 203,169 |
| 2021-07-12 | Sakys John (CFO) | Sale | 1,000 | 278.77 | 278,770 |
| 2021-07-12 | Sakys John (CFO) | Option Ex | 1,000 | 89.70 | 89,700 |
Insider trading activities including stock purchases, stock sales, and option exercises of MLAB listed in the above tables cannot be completely guaranteed as to their accuracy. For more insider trading information of Mesa Laboratories Inc /co/ (symbol MLAB, CIK number 724004) see the Securities and Exchange Commission (SEC) website.