MESA LABORATORIES INC /CO/ (MLAB) has 211 open-market insider trades by 22 insiders since 2006. Over the last six months insiders net sold $415K. The most active filer is John James Sullivan, Director.
| Name | Title | Tier | Trades | Value | Last Trade |
|---|---|---|---|---|---|
| John James Sullivan | Dir | — | 34 | $30.7M | 2026-08-15 |
| Robert V. Dwyer | Dir | — | 20 | $15.5M | 2020-04-03 |
| Evan Guillemin | Dir | — | 18 | $15.2M | 2022-09-01 |
| John Sakys | CFO | — | 25 | $9.4M | 2026-06-22 |
| Gary M. Owens | CEOPres | — | 7 | $6.4M | 2025-10-27 |
| H. Stuart Campbell | Dir | — | 17 | $6.4M | 2018-11-07 |
| John Bradley Schmieder | Dir | — | 14 | $5.6M | 2023-09-15 |
| Glenn E. Adriance | — | — | 7 | $4.1M | 2017-06-09 |
| Brian David Archbold | VP | — | 12 | $3.4M | 2026-06-22 |
| David M. Kelly | Dir | — | 16 | $3.3M | 2021-11-08 |
| Insider | Title | Type | Value | Date |
|---|---|---|---|---|
| R. Tony Tripeny | Director | Buy | $102K | 2026-08-13 |
| John James Sullivan | Director | Sell | $800K | 2026-08-13 |
| Lyndsey Elizabeth Crennen | CAO | Sell | $40K | 2026-06-22 |
| Brian David Archbold | VP | Sell | $225K | 2026-06-22 |
| John Sakys | CFO | Sell | $253K | 2026-06-22 |
| John Sakys | CFO | Sell | $124K | 2026-06-16 |
Companies that share insiders with MLAB, and sector peers with recent insider buying. Related by who files, not by how the stocks move.
| Brian David Archbold | VP | Sell | $117K | 2026-06-16 |
| Lyndsey Elizabeth Crennen | CAO | Sell | $12K | 2026-06-16 |
| R. Tony Tripeny | Director | Buy | $100K | 2026-03-10 |
| Mark Christopher Capone | Director | Buy | $99K | 2026-03-10 |
| Shiraz Shabanali Ladiwala | Director | Buy | $253K | 2026-03-10 |
| Gary M. Owens | CEO & President | Sell | $377K | 2025-06-16 |
| Brian David Archbold | SVP Operations | Sell | $46K | 2025-06-16 |
| John Sakys | CFO | Sell | $125K | 2025-06-16 |
| Gary M. Owens | CEO & President | Sell | $2.6M | 2025-03-19 |