Company profile
Mesa Laboratories Inc /co/ Insider Trading
MLABEvery SEC Form 4 insider trading filing for Mesa Laboratories Inc /co/ (MLAB) since April 2023 — open-market buys and sells by directors and officers, option exercises, and cluster activity, updated as each filing is reported to the SEC. Why 2023?
- Exchange
- Nasdaq
- Sector
- Industrial Instruments For Measurement, Display, and Control
- CIK
- 0000724004
- Filings
- 107
- Insiders
- 12
- Last filing
- 2026-08-15
Activity summary
Recent insider activity is bullish. Over the last 30 days, 14 insiders purchased shares (net $102K) versus 1 sale. Buying was led by Kadia Siddhartha.
Three year balance
Buy and sell value by quarter, Q4 23 to Q3 26. Mesa Laboratories Inc /co/ insiders are net buyers across the period shown.
Bars below the rule are sales, above are purchases. Largest quarter on the chart is $2.6M.
90 day insight
Over the last 90 days, Mesa Laboratories Inc /co/ insiders bought $2.6M (37 transactions) and sold $1.1M (3 transactions).
- Most active insider: Sakys John with 11 transactions totaling $1.2M.
- Largest single sale: $800K by Sullivan John James on Aug 13, 2026.
- 57% of recent sales were pre-scheduled 10b5-1 trades — typically less informative than open-market activity.
Activity skews bullish — buys outpace sales.
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 15, 2026 | Hall Shannon | MLAB | Option Exercise | 2,784 | — | — |
| Aug 15, 2026 | Alltoft Jennifer Sadie | MLAB | Option Exercise | 2,784 | — | — |
| Aug 15, 2026 | Ladiwala Shiraz Shabanali | MLAB | Option Exercise | 3,810 | — | — |
| Aug 15, 2026 | Tripeny R Tony | MLAB | Option Exercise | 2,784 | — | — |
| Aug 15, 2026 | Sullivan John James | MLAB | Option Exercise | 2,784 | — | — |
45 more transactions hidden
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Query this yourself
The same rows, over the API.
curl "https://api.form4api.com/v1/transactions?ticker=MLAB" \
-H "X-Api-Key: $KEY"Top insiders
By total value filed.
Institutional Ownership
Top 13F-HR holders of Mesa Laboratories Inc /co/ as of 2026-06-30
Data source: quarterly 13F-HR filings — institutional holders report positions within 45 days of quarter end. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →