List of insiders holdings for MESA LABORATORIES INC:
- Shares directly owned by the insider.
- Shares indirectly owned by the insider.
- Total shares owned by the insider (sum of shares directly and indirectly owned).
- Total market value if available.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
| # | Insider Holder Name | Report Date Time | Shares Owned Directly Indirectly | Total Shares Owned | Filing |
| 1 | SCHMIEDER LUKE R Former Director Director | 2015-04-28 14:19:47 | 188,573 0 | 188,573 | Form 4 |
| 2 | DUKE PAUL D Director | 2010-05-24 08:39:35 | 74,323 0 | 74,323 | Form 4 |
| 3 | SEG Ventures LLC See Remarks | 2018-10-19 17:27:58 | 73,067 0 | 73,067 | Form 13D |
| 4 | PETERSON STEVEN W Former Chief Financial Officer | 2013-02-07 14:28:59 | 70,390 0 | 70,390 | Form 4 |
| 5 | Sullivan John James Director | 2025-12-05 11:10:57 | 25,282 44,780 | 70,062 | Form 4 |
| 6 | Schmieder John Bradley Director | 2023-09-19 12:34:11 | 62,760 0 | 62,760 | Form 4 |
| 7 | CAMPBELL H STUART Director | 2018-11-28 18:02:36 | 41,677 0 | 41,677 | Form 4 |
| 8 | Dwyer Robert V Director | 2020-04-03 19:01:29 | 41,309 0 | 41,309 | Form 4 |
| 9 | Kadia Siddhartha President and CEO | 2026-05-19 09:04:27 | 35,236 0 | 35,236 | Form 4/A |
| 10 | BROOKS MICHAEL T Director | 2019-06-14 13:03:28 | 32,730 0 | 32,730 | Form 4 |
| 11 | MESA LABORATORIES INC Director | 2022-06-16 17:55:49 | 29,818 0 | 29,818 | Form 4 |
| 12 | GUILLEMIN EVAN Director | 2022-09-02 12:24:58 | 29,207 0 | 29,207 | Form 4 |
| 13 | Adriance Glenn E CSMO | 2018-03-26 10:43:41 | 20,838 0 | 20,838 | Form 4 |
| 14 | Sakys John CFO | 2026-06-17 12:09:10 | 16,538 50 | 16,588 | Form 4 |
| 15 | Owens Gary M President and CEO | 2026-04-02 16:29:20 | 16,448 0 | 16,448 | Form 4 |
| 16 | Ladiwala Shiraz Shabanali Director | 2026-03-10 17:43:24 | 8,523 0 | 8,523 | Form 4 |
| 17 | Alltoft Jennifer Sadie Director | 2025-08-18 13:34:29 | 7,662 0 | 7,662 | Form 4 |
| 18 | Hall Shannon Director | 2025-08-18 14:02:38 | 6,973 0 | 6,973 | Form 4 |
| 19 | Tripeny R Tony Director | 2026-03-10 15:39:49 | 5,398 0 | 5,398 | Form 4 |
| 20 | DINOIA GREGORY SVP Commercial | 2022-06-22 14:04:09 | 4,024 0 | 4,024 | Form 4 |
| 21 | Tranmer Michael Executive Vice President | 2012-04-02 19:31:17 | 4,000 0 | 4,000 | Form 4 |
| 22 | Archbold Brian David SVP Operations | 2026-06-17 12:23:27 | 3,710 0 | 3,710 | Form 4 |
| 23 | Capone Mark Christopher Director | 2026-03-10 15:46:59 | 3,429 0 | 3,429 | Form 4 |
| 24 | KELLY DAVID M Director | 2021-11-09 10:44:57 | 3,169 0 | 3,169 | Form 4 |
| 25 | Crennen Lyndsey Elizabeth CAO | 2026-06-17 12:19:18 | 1,473 0 | 1,473 | Form 4 |
| 26 | Perez David Brian Director | 2020-06-17 10:42:46 | 221 0 | 221 | Form 4 |