MESA LABORATORIES INC /CO/ (MLAB) insider buying and selling
In the last 90 days at MESA LABORATORIES INC /CO/ (MLAB), 2 insiders made 2 open-market purchases worth $902K and 1 insider made 1 open-market sale worth $800K, as reported on SEC Form 4. Over the last 12 months, 2 insiders bought $902K of the stock, led by Siddhartha Kadia (CEO), who bought $800K on Aug 13, 2026; 4 insiders sold $1.6M, of which $545K was scheduled or tax-related.
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Unlock MLABRecent open-market insider trades
Trades by the same insider within a week are shown as one line.
| Date | Insider | Type | Shares | Price | Value |
|---|---|---|---|---|---|
| Siddhartha Kadia CEO | Open market purchase | 7,093 | $112.80 | $800K | |
| John James Sullivan Director | Open market sale | 7,093 | $112.80 | $800K | |
| R Tony Tripeny Director | Open market purchase | 900 | $113.69 | $102K | |
| Brian David Archbold SVP | Open market sale | 2,516 | $89.50 | $225K |
Scheduled and tax-related sales
Sales made under a pre-arranged 10b5-1 plan or to cover tax on vesting shares. They are listed separately because they are not a fresh decision to sell.
| Date | Insider | Type | Shares | Price | Value |
|---|---|---|---|---|---|
| John Sakys CFO | 10b5-1 sale 2 trades | 4,050 | avg. $93.05 | $377K | |
| Lyndsey Elizabeth Crennen CAO | Sell to cover | 442 | $89.50 | $40K | |
| Brian David Archbold SVP | 10b5-1 sale | 1,151 | $101.27 | $117K | |
| Lyndsey Elizabeth Crennen CAO | 10b5-1 sale | 118 | $101.27 | $12K |
What the MLAB insider trades really mean
The table above is the public summary. With an Insider Intel account you get the analysis behind it, for MESA LABORATORIES INC /CO/ and every other stock we track:
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Questions about MLAB insider trading
Who bought MESA LABORATORIES INC /CO/ (MLAB) stock recently?
Insiders who bought MESA LABORATORIES INC /CO/ stock on the open market in the last 12 months: Siddhartha Kadia ($800K), R Tony Tripeny ($102K). The most recent purchase was reported on Aug 13, 2026.
Are insiders buying or selling MLAB?
Over the last 12 months insiders were roughly balanced between buying and selling of MLAB on discretionary trades: $902K bought against $1.0M sold (scheduled and tax-related sales excluded).
What is a sell-to-cover or 10b5-1 sale?
A 10b5-1 sale is scheduled in advance under a pre-arranged plan, and a sell-to-cover sale is made to pay tax on vesting shares. Neither is a fresh decision to sell, so they say less about an insider's view than a discretionary sale.
Where does this data come from?
Officers, directors and large shareholders report their trades to the SEC on Form 4. This page lists the open-market purchases and sales by individual insiders from those public filings; funds and other institutions are not shown.
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How to read this page
Officers, directors and large shareholders must report their trades in company shares to the SEC on Form 4. This page lists open-market purchases and sales by individual insiders: trades made on the stock exchange at the going price. Funds and other institutions are not shown here.
Information from SEC EDGAR Form 4 filings, shown for general information only. It is not financial advice and does not recommend buying or selling any security. Trades are shown by transaction date and may be reported up to two business days later.