11 insiders reported 61 Form 4 transactions for MESA LABORATORIES INC /CO/ (MLAB) over the past 18 months (most recent 2026-08-17). Recent activity: Sullivan John James (Director) Buy 2,784 shares, Capone Mark Christopher (Director) Buy 2,784 shares, Tripeny R Tony (Director) Buy 900 shares, Tripeny R Tony (Director) Buy 2,784 shares, Kadia Siddhartha (President and CEO) Buy 7,093 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-17 | Sullivan John James | Director | Buy | 2,784 | $0 |
| 2026-08-17 | Capone Mark Christopher | Director | Buy | 2,784 | $0 |
| 2026-08-17 | Tripeny R Tony | Director | Buy | 900 | $102,321 |
| 2026-08-17 | Tripeny R Tony | Director | Buy | 2,784 | $0 |
| 2026-08-17 | Kadia Siddhartha | President and CEO | Buy | 7,093 | $800,090 |
| 2026-08-17 | Sullivan John James | Director | Sell | 7,093 | $800,090 |
| 2026-08-17 | Hall Shannon | Director | Buy | 2,784 | $0 |
| 2026-08-17 | Ladiwala Shiraz Shabanali | Director | Buy | 3,810 | $0 |
| 2026-08-17 | Alltoft Jennifer Sadie | Director | Buy | 2,784 | $0 |
| 2026-06-23 | Archbold Brian David | SVP Operations | Buy | 2,480 | $235,848 |
| 2026-06-23 | Sakys John | CFO | Buy | 1,036 | $98,524 |
| 2026-06-23 | Archbold Brian David | SVP Operations | Buy | 844 | $80,264 |
| 2026-06-23 | Crennen Lyndsey Elizabeth | CAO | Buy | 125 | $11,888 |
| 2026-06-23 | Crennen Lyndsey Elizabeth | CAO | Buy | 233 | $22,158 |
| 2026-06-23 | Sakys John | CFO | Buy | 2,282 | $217,018 |
| 2026-06-23 | Archbold Brian David | SVP Operations | Buy | 1,859 | $176,791 |
| 2026-06-23 | Crennen Lyndsey Elizabeth | CAO | Buy | 368 | $34,997 |
| 2026-06-23 | Sakys John | CFO | Sell | 2,827 | $253,022 |
| 2026-06-23 | Sakys John | CFO | Buy | 2,756 | $262,096 |
| 2026-06-23 | Crennen Lyndsey Elizabeth | CAO | Buy | 263 | $25,011 |
| 2026-06-23 | Crennen Lyndsey Elizabeth | CAO | Sell | 442 | $39,560 |
| 2026-06-23 | Archbold Brian David | SVP Operations | Sell | 2,516 | $225,187 |
| 2026-06-17 | Crennen Lyndsey Elizabeth | CAO | Sell | 118 | $11,950 |
| 2026-06-17 | Sakys John | CFO | Sell | 1,223 | $123,850 |
| 2026-06-17 | Archbold Brian David | SVP Operations | Sell | 1,151 | $116,558 |
Source: SEC Form 4 filings · as of 2026-08-17