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Mesa Laboratories Inc /Co/ (NASDAQ:MLAB)
US · Delayed Price · Currency is USD
Healthcare · Medical - Specialties
129.87+1.21 (+0.94%)
Market cap
$727M
Insider Score
Health Score
Analyst consensus
Listed since
Feb 29, 1984
Website
Insider Score
/ 100
MLAB Insider Score
MESA LABORATORIES INC /CO/ has a live Insider Score.
Scored on 2 qualifying trades from 2 insiders in the last 90 days.
MLAB Stock Insider Trading Activity
MLAB stock’s insider trading shows 2 purchases for an estimated $902.41K and 7 sales on the open market for an estimated $1.57M by company insiders over the last 6 months.
Not enough price history.
Insider Trading Activity (Form 4 Filings)
An insider trade occurs when an individual that has non-public information about a company buys or sells shares of that company’s stock. Examples of insiders include a company’s executive officers (CEO, CFO, COO), its board of directors, and its major shareholders. Insiders are required to submit their trading activity to the SEC through Form 4 filings.
Scored window · last 90 days2 qualifying buys2 insiders$902.41K bought— these are the numbers in the rankings table; the full history below shows every filing (buys, sells and older activity).
| Insider | Action | Shares | Avg Cost | Total | Δ Holdings | Held After | Date | Grade | Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| Hall Shannon Director | Option exercise | 2,784 | — | — | 66.5% | 6,973 | Aug 15, 2026 | — | Form 4 |
| Tripeny R Tony Director | Option exercise | 2,784 | — | — | 44.2% | 9,082 | Aug 15, 2026 | — | Form 4 |
| Sullivan John James Director | Option exercise | 2,784 | — | — | 15.6% | 20,618 | Aug 15, 2026 | — | Form 4 |
| Capone Mark Christopher Director | Option exercise | 2,784 | — | — | 81.2% | 6,213 | Aug 15, 2026 | — | Form 4 |
| Alltoft Jennifer Sadie Director | Option exercise | 2,784 | — | — | 57.1% | 7,662 | Aug 15, 2026 | — | Form 4 |
| Ladiwala Shiraz Shabanali Director | Option exercise | 3,810 | — | — | 44.7% | 12,333 | Aug 15, 2026 | — | Form 4 |
| Kadia Siddhartha CEO | Buy | 7,093 | $112.80 | $800.09K | New | 7,093 | Aug 13, 2026 | A+First BuyCEO Buy | Form 4 |
| Tripeny R Tony Director | Buy | 900 | $113.69 | $102.32K | 16.7% | 6,298 | Aug 13, 2026 | C | Form 4 |
| Sullivan John James Director | Sell | 7,093 | $112.80 | $800.09K | 28.5% | 17,834 | Aug 13, 2026 | — | Form 4 |
| Sakys John CFO | Sell | 2,827 | $89.50 | $253.02K | 12.5% | 19,785 | Jun 22, 2026 | — | Form 4 |
| Crennen Lyndsey Elizabeth Other | Sell | 442 | $89.50 | $39.56K | 18.0% | 2,020 | Jun 22, 2026 | — | Form 4 |
| Archbold Brian David Other | Sell | 2,516 | $89.50 | $225.18K | 28.3% | 6,377 | Jun 22, 2026 | — | Form 4 |
| Archbold Brian David Other | Option exercise | 844 | $95.10 | $80.26K | 22.7% | 4,554 | Jun 18, 2026 | — | Form 4 |
| Crennen Lyndsey Elizabeth Other | Option exercise | 233 | $95.10 | $22.16K | 14.6% | 1,831 | Jun 18, 2026 | — | Form 4 |
| Crennen Lyndsey Elizabeth Other | Option exercise | 125 | $95.10 | $11.89K | 8.5% | 1,598 | Jun 18, 2026 | — | Form 4 |
| Crennen Lyndsey Elizabeth Other | Award | 263 | $95.10 | $25.01K | 12.0% | 2,462 | Jun 18, 2026 | — | Form 4 |
| Crennen Lyndsey Elizabeth Other | Option exercise | 368 | $95.10 | $35.00K | 20.1% | 2,199 | Jun 18, 2026 | — | Form 4 |
| Archbold Brian David Other | Award | 1,859 | $95.10 | $176.79K | 26.4% | 8,893 | Jun 18, 2026 | — | Form 4 |
| Archbold Brian David Other | Option exercise | 2,480 | $95.10 | $235.85K | 54.5% | 7,034 | Jun 18, 2026 | — | Form 4 |
| Sakys John CFO | Option exercise | 2,756 | $95.10 | $262.10K | 15.7% | 20,330 | Jun 18, 2026 | — | Form 4 |
| Sakys John CFO | Option exercise | 1,036 | $95.10 | $98.52K | 6.3% | 17,574 | Jun 18, 2026 | — | Form 4 |
| Sakys John CFO | Award | 2,282 | $95.10 | $217.02K | 11.2% | 22,612 | Jun 18, 2026 | — | Form 4 |
| Archbold Brian David Other | Sell | 1,151 | $101.27 | $116.56K | 23.7% | 3,710 | Jun 16, 2026 | — | Form 4 |
| Crennen Lyndsey Elizabeth Other | Sell | 118 | $101.27 | $11.95K | 7.4% | 1,473 | Jun 16, 2026 | — | Form 4 |
| Sakys John CFO | Sell | 1,223 | $101.27 | $123.85K | 6.9% | 16,538 | Jun 16, 2026 | — | Form 4 |
| Archbold Brian David Other | Option exercise | 2,454 | $104.08 | $255.41K | 102% | 4,861 | Jun 15, 2026 | — | Form 4 |
| Sakys John CFO | Option exercise | 2,717 | $104.08 | $282.79K | 18.1% | 17,761 | Jun 15, 2026 | — | Form 4 |
| Ladiwala Shiraz Shabanali Director | Buy | 3,500 | $72.23 | $252.81K | 69.7% | 8,523 | Mar 10, 2026 | BCluster BuyFirst Buy | Form 4 |
| Capone Mark Christopher Director | Buy | 1,301 | $76.35 | $99.33K | 61.1% | 3,429 | Mar 10, 2026 | CCluster BuyFirst Buy | Form 4 |
| Tripeny R Tony Director | Buy | 1,315 | $76.00 | $99.94K | 32.2% | 5,398 | Mar 10, 2026 | CCluster BuyFirst Buy | Form 4 |
| Sullivan John James Director | Gift | 2,000 | — | — | 7.3% | 25,282 | Dec 2, 2025 | — | Form 4 |
| Owens Gary M CEO | Option exercise | 11,558 | — | — | 22.0% | 64,135 | Oct 27, 2025 | — | Form 4 |
What these mean— the action is the SEC’s own Form 4 transaction code. Only a buy or a sell is an open-market trade; the rest are transfers, awards and exercises, which is why they carry no price.
- Buy (P) — Open-market or private purchase
- Sell (S) — Open-market or private sale
- Award (A) — Grant or award from the company, not a purchase
- Option exercise (M) — Exercise or conversion of an exempt derivative
- Gift (G) — Bona fide gift
Disclaimer — Informational only — not investment advice. Insider transaction data is sourced from SEC Form 4 filings; market data from public feeds and may be delayed. The Insider Score is a proprietary score for research purposes and does not predict future performance. Always do your own research.