Updated Jul 16, 2026 · Last SEC filing 2026-06-23
MESA LABORATORIES INC /CO/ (MLAB) has filed 10 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-06-23. 2 Form 8-K material event filings were reported by MLAB in the last 90 days. 5 Form 144 notices of proposed sale were filed for MLAB stock. InsiderAlpha tracks every MLAB SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SEC CIK | 0000724004 |
|---|
| Form 4 filings (90d) | 10 |
|---|---|
| Form 8-K filings (90d) | 2 |
| Form 144 notices (90d) | 5 |
| Latest Form 4 filing | 2026-06-23 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Sakys John | CFO | S — Open-market sale | 2.8K | $89.50 | $253K | SEC | |
| Archbold Brian David | SVP Operations | S — Open-market sale | 2.5K | $89.50 | $225K | SEC | |
| Crennen Lyndsey Elizabeth | CAO | S — Open-market sale | 442 | $89.50 | $40K | SEC | |
| Crennen Lyndsey Elizabeth | CAO | M — Option exercise | 368 | $95.10 | $35K | SEC | |
| Crennen Lyndsey Elizabeth | CAO | M — Option exercise | 125 | $95.10 | $12K | SEC | |
| Crennen Lyndsey Elizabeth | CAO | M — Option exercise | 233 | $95.10 | $22K | SEC | |
| Archbold Brian David | SVP Operations | A — Grant or award | 1.9K | $95.10 | $177K | SEC | |
| Sakys John | CFO | M — Option exercise | 2.8K | $95.10 | $262K | SEC | |
| Crennen Lyndsey Elizabeth | CAO | A — Grant or award | 263 | $95.10 | $25K | SEC | |
| Sakys John | CFO | M — Option exercise | 1.0K | $95.10 | $99K | SEC | |
| Sakys John | CFO | A — Grant or award | 2.3K | $95.10 | $217K | SEC | |
| Archbold Brian David | SVP Operations | M — Option exercise | 2.5K | $95.10 | $236K | SEC | |
| Archbold Brian David | SVP Operations | M — Option exercise | 844 | $95.10 | $80K | SEC | |
| Sakys John | CFO | S — Open-market sale | 1.2K | $101.27 | $124K | SEC | |
| Archbold Brian David | SVP Operations | S — Open-market sale | 1.2K | $101.27 | $117K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for MESA LABORATORIES INC /CO/ (MLAB). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Sakys John | 11 | $1.24M |
| Archbold Brian David | 11 | $1.09M |
| Crennen Lyndsey Elizabeth | 9 | $146K |
| Kadia Siddhartha | 2 | — |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in MLAB insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
Open the live MLAB dashboard on InsiderAlpha for real-time alerts, charting, and full historical filing search.