Mesa Laboratories Inc
MLAB- Exchange
- Nasdaq
- Industry
- Industrial Instruments For Measurement, Display, and Control
- SEC CIK
- 0000724004
In the last 90 days, Mesa Laboratories Inc insiders filed 2 open-market purchases and 1 sale; 159 institutions reported holding it in 13F filings for Q2 2026, worth $500.8M in total; no superinvestor holds it.
Open-market trades, last 90 days
Open-market purchases (P) and sales (S) by Mesa Laboratories Inc insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.
- Open-market buys
- 2 filings
- 2 insiders, $902.4K in total
- Open-market sells
- 1 filing
- 1 insider, $800.1K in total
- Insiders trading
- 3
- Net value
- +$102.3K
- Purchases minus sales
Insider roster
Directors, officers and 10% owners who have filed a Form 4 for Mesa Laboratories Inc, current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.
| Name | Title | Last reported holding | Last filing | Filings, past year |
|---|---|---|---|---|
| Capone Mark Christopher | Director | 6,213 | Sep 11, 2026 | 3 |
| Ladiwala Shiraz Shabanali | Director | 12,333 | Sep 11, 2026 | 3 |
| Alltoft Jennifer Sadie | Director | 7,662 | Sep 11, 2026 | 2 |
| Hall Shannon | Director | 6,973 | Sep 11, 2026 | 2 |
| Sullivan John James | Director | 20,618 | Sep 11, 2026 | 4 |
| Tripeny R Tony | Director | 9,082 | Sep 11, 2026 | 4 |
| Kadia Siddhartha | President and CEO | 7,093Indirect | Aug 17, 2026 | 2 |
| Sakys John | CFO | 19,785 | Jun 23, 2026 | 3 |
| Archbold Brian David | SVP Operations | 6,377 | Jun 23, 2026 | 3 |
| Crennen Lyndsey Elizabeth | CAO | 2,020 | Jun 23, 2026 | 2 |
| Owens Gary M | President and CEO | 64,135 | Apr 2, 2026 | 2 |
| Schmieder John Bradley | Director | 62,760 | Sep 19, 2023 | 0 |
| Guillemin Evan | Director | 29,207 | Sep 2, 2022 | 0 |
| Dinoia Gregory | SVP Commercial | 3,634 | Jun 22, 2022 | 0 |
| Mesa Laboratories Inc | Director | 29,788 | Jun 16, 2022 | 0 |
| Kelly David M | Director | 2,600 | Nov 9, 2021 | 0 |
Insider trades
Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Oct 25, 2021 (view filing) | Oct 20 | 5 daysLate | Sakys JohnCFO | SSale | −2.00K | $309.86 | −$619.7K | −21.0%7.51K after | |
| Oct 4, 2021 (view filing) | Oct 1 | 3 days | Sullivan John JamesDirector | SSale | −1.25K | $304.48 | −$380.6K | −5.4%21.9K after | |
| Sep 10, 2021 (view filing) | Sep 10 | Same day | Sakys JohnCFO | SSale | −1.40K | $270.21 | −$378.3K | −15.7%7.51K after | |
| Sep 1, 2021 (view filing) | Sep 1 | Same day | Sullivan John JamesDirector | SSale | −1.25K | $268.22 | −$335.3K | −5.1%23.1K after | |
| Sep 1, 2021 (view filing) | Aug 31 | 1 day | Kelly David MDirector | SSale | −603 | $267.29 | −$161.2K | −18.8%2.60K after | |
| Aug 17, 2021 (view filing) | Aug 16 | 1 day | Sullivan John JamesDirector | SSale | −5.19K | $272.16 | −$1.41M | −18.2%23.4K after | |
| Aug 13, 2021 (view filing) | Aug 12 | 1 day | Sakys JohnCFO | SSale | −1.00K | $275.16 | −$275.2K | −11.7%7.51K after | |
| Aug 12, 2021 (view filing) | Aug 11 | 1 day | Schmieder John BradleyDirector | SSale | −800 | $278.06 | −$222.4K | −1.1%70.7K after | |
| Aug 12, 2021 (view filing) | Aug 9 | 3 daysLate | Archbold Brian DavidSVP Continuous Improvement | SSale | −639 | $280.03 | −$178.9K | −80.6%154 after | |
| Aug 2, 2021 (view filing) | Aug 2 | Same day | Sullivan John JamesDirector | SSale | −1.25K | $290.47 | −$363.1K | −5.1%23.0K after | |
| Jul 19, 2021 (view filing) | Jul 16 | 3 days | Guillemin EvanDirector | SSale | −720 | $282.18 | −$203.2K | −2.4%29.4K after | |
| Jul 13, 2021 (view filing) | Jul 12 | 1 day | Sakys JohnCFO | SSale | −1.00K | $278.77 | −$278.8K | −11.7%7.51K after | |
| Jul 6, 2021 (view filing) | Jul 1 | 5 days | Sakys JohnCFO | SSale | −1.00K | $267.04 | −$267.0K | −11.7%7.51K after | |
| Jul 6, 2021 (view filing) | Jul 1 | 5 days | Sullivan John JamesDirector | SSale | −1.25K | $267.44 | −$334.3K | −4.9%24.3K after |