// company-profile
Mesa Laboratories Inc /co/
MLAB// activity-summary
Recent insider activity is bullish. Over the last 30 days, 23 insiders purchased shares (net $1.2M) versus 5 sales. Buying was led by Sakys John.
// 90-day insight
Over the last 90 days, Mesa Laboratories Inc /co/ insiders bought $1.7M (24 transactions) and sold $517K (6 transactions).
- Most active insider: Sakys John with 11 transactions totaling $1.2M.
- Largest single purchase: $283K by Sakys John on Jun 15, 2026.
- 14% of recent sales were pre-scheduled 10b5-1 trades — typically less informative than open-market activity.
Activity skews bullish — buys outpace sales.
Institutional Ownership
Top 13F-HR holders of Mesa Laboratories Inc /co/ as of 2026-03-31
Data source: SEC Form 13F-HR filings. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jun 22, 2026 | Archbold Brian David | MLAB | Sale | 2,516 | $89.50 | $225K |
| Jun 22, 2026 | Crennen Lyndsey Elizabeth | MLAB | Sale | 442 | $89.50 | $40K |
| Jun 22, 2026 | Sakys John | MLAB | Sale10b5 | 2,827 | $89.50 | $253K |
| Jun 18, 2026 | Archbold Brian David | MLAB | Option Exercise | 844 | $0.00 | $0K |
| Jun 18, 2026 | Sakys John | MLAB | Option Exercise | 2,756 | $0.00 | $0K |
45 more transactions hidden
Free account · No credit card required
Building something? Get API access →
Popular companies on Form4API
Browse insider trading activity for other actively-filed companies.