Insider holders · CIK 0000724004
MESA LABORATORIES INC /CO/ · MLAB
Every insider with a reported Table I holding at this company, ranked by their last-reported share count. A balance is only as fresh as its filing — the report date sits next to every row on purpose. ← Back to activity
| Insider | Direct shares | Indirect shares | Total reported | Last report (ET) | From |
|---|---|---|---|---|---|
| Evan GuilleminDirector | 48,468 | 171,305 | 219,773 | Feb 20, 2019 · 6:30 pm EST | Form 4 |
| Luke R SchmiederFormer Director | 176,293 | — | 176,293 | Apr 28, 2015 · 2:19 pm EDT | Form 4 |
| John Bradley SchmiederDirector | 75,939 | — | 75,939 | Feb 8, 2019 · 6:59 pm EST | Form 4 |
| John James SullivanDirector | 20,618 | 45,110 | 65,728 | Aug 17, 2026 · 5:01 pm EDT | Form 4 |
| Robert V DwyerDirector | 53,571 | — | 53,571 | Feb 20, 2019 · 5:44 pm EST | Form 4 |
| H Stuart CampbellDirector | 41,677 | — | 41,677 | Nov 28, 2018 · 6:02 pm EST | Form 4 |
| Michael T BrooksDirector | 27,900 | — | 27,900 | Nov 28, 2018 · 5:10 pm EST | Form 4 |
| John SakysCFO | 19,785 | 50 | 19,835 | Jun 23, 2026 · 12:23 pm EDT | Form 4 |
| Shiraz Shabanali LadiwalaDirector | 12,333 | — | 12,333 | Aug 17, 2026 · 5:55 pm EDT | Form 4 |
| Gary M OwensPresident and CEO | 12,160 | — | 12,160 | Jun 6, 2018 · 1:54 pm EDT | Form 4 |
| Glenn E AdrianceCSMO | 10,000 | — | 10,000 | Jun 12, 2017 · 4:26 pm EDT | Form 4 |
| R Tony TripenyDirector | 9,082 | — | 9,082 | Aug 17, 2026 · 5:30 pm EDT | Form 4 |
| Jennifer Sadie AlltoftDirector | 7,662 | — | 7,662 | Aug 17, 2026 · 7:32 pm EDT | Form 4 |
| Siddhartha KadiaPresident and CEO | — | 7,093 | 7,093 | Aug 17, 2026 · 11:49 am EDT | Form 4 |
| Shannon HallDirector | 6,973 | — | 6,973 | Aug 17, 2026 · 5:46 pm EDT | Form 4 |
| Brian David ArchboldSVP Operations | 6,377 | — | 6,377 | Jun 23, 2026 · 1:02 pm EDT | Form 4 |
| Mark Christopher CaponeDirector | 6,213 | — | 6,213 | Aug 17, 2026 · 7:40 pm EDT | Form 4 |
| David M KellyDirector | 2,900 | — | 2,900 | Feb 7, 2019 · 11:20 am EST | Form 4 |
| Lyndsey Elizabeth CrennenCAO | 2,020 | — | 2,020 | Jun 23, 2026 · 1:34 pm EDT | Form 4 |
| David Brian PerezDirector | 275 | — | 275 | Jan 25, 2019 · 12:38 pm EST | Form 3 |
| SEG Ventures, LLCDirector | 0 | — | 0 | Oct 19, 2018 · 5:27 pm EDT | Form 4 |
Balances come from each insider’s most recent filing that reports a Table I holding; an insider who left the company years ago still appears with their last-known figure and its date. Indirect totals collapse multiple vehicles (trusts, LLCs) into one number — open the filing for the breakdown. Shares as filed, not split-adjusted.