🕵️ MESA Laboratories Inc /CO/ ($MLAB)
SEC insider & ownership activity, last 12 months · CIK 724004 · every row links its SEC filing
Over the last 12 months insiders sold $1.6M against $1.4M of open-market buying. Kadia Siddhartha bought $800K in discretionary trades (Aug). BlackRock, Inc. trimmed 14.4% → 6.9%. No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
4 buyers, $1.4M (5 lots) · 4 sellers, $1.6M (7 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Kadia Siddhartha | 1 | $800K | 0 | – | Aug 13, 2026 |
| Sullivan John James | 0 | – | 1 | $800K | Aug 13, 2026 |
| Sakys John | 0 | – | 2 | $377K | Jun 22, 2026 |
| Archbold Brian David | 0 | – | 2 | $342K | Jun 22, 2026 |
| Ladiwala Shiraz Shabanali | 1 | $253K | 0 | – | Mar 10, 2026 |
| Tripeny R. Tony | 2 | $202K | 0 | – | Aug 13, 2026 |
| Capone Mark Christopher | 1 | $99K | 0 | – | Mar 10, 2026 |
| Crennen Lyndsey Elizabeth | 0 | – | 2 | $52K | Jun 22, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Conestoga Capital Advisors | 11.4% | 13G | Jan 10, 2025 | filing ↗ | |
| LONG PATH Smaller Companies Fund, LP | 8.6% | 13G | Jul 7, 2026 | filing ↗ | |
| LONG PATH Fund GP, LLC | 8.6% | 13G | Jul 7, 2026 | filing ↗ | |
| LONG PATH Partners, LP | 8.6% | 13G | Jul 7, 2026 | filing ↗ | |
| LONG PATH Holdings LLC | 8.6% | 13G | Jul 7, 2026 | filing ↗ | |
| William Thomas Brennan | 8.6% | 13G | Jul 7, 2026 | filing ↗ | |
| Brian Paul Nelson | 8.6% | 13G | Jul 7, 2026 | filing ↗ | |
| Conestoga Funds | 7.6% | 13G | Jan 10, 2025 | filing ↗ | |
| BlackRock, Inc. | 6.9% | 13G | Oct 2, 2025 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Gary M. Owens | $2.6M | Aug 27, 2026 | filing ↗ |
| Gary M. Owens | $2.5M | Aug 21, 2026 | filing ↗ |
| Sakys John | $253K | Jun 22, 2026 | filing ↗ |
| Archbold Brian David | $225K | Jun 22, 2026 | filing ↗ |
| Archbold Brian David | $117K | Jun 16, 2026 | filing ↗ |
| Sakys John | $124K | Jun 16, 2026 | filing ↗ |
| Gary M. Owens | $375K | Jun 16, 2026 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Shareholder vote (5.07) | Sep 8, 2026 | filing ↗ |
| Earnings (2.02) | Aug 10, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 10, 2026 | filing ↗ |
| Amendments to the Registrant's Code of Ethics (5.05) | Jul 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 30, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jun 11, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 11, 2026 | filing ↗ |
| Earnings (2.02) | May 27, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 27, 2026 | filing ↗ |
| Officer/director changes (5.02) | Mar 20, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 20, 2026 | filing ↗ |
| Officer/director changes (5.02) | Mar 3, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Mar 3, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 3, 2026 | filing ↗ |
| Earnings (2.02) | Feb 3, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 3, 2026 | filing ↗ |
| Earnings (2.02) | Nov 6, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 6, 2025 | filing ↗ |