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MLAB · Mesa Laboratories Inc

Technology · −4.1% on Oct 16

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Updated Oct 17 · 6 feeds behind: Insider filings, 4 days, and 5 more · Every feed →

On this page

The market view

Price chart

The interactive MLAB chart (by TradingView) loads here.

Our take

4 rules fired on MLAB

In short: none of these rules has solid or some evidence yet, so they show no clear lean on MLAB.

How each did in past tests, against similar stocks over 3 months. Past results don't predict future ones.

All 4 rules
The 0–100 score for MLAB, and which of these rules are open on it right now
Members see one number for how strongly these rules agree on MLAB, and the day each rule fired. Better-tested rules count more, and so do different kinds of filings that point the same way.
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Compare with this company’s history

Is disclosure activity unusual?

See how many different insiders or members of Congress reported purchases or sales of MLAB. Each bar covers 28 days, by disclosure date. Several trades by one person count once in each group and period.

Latest period: Sep 23, 2026–Oct 20, 2026 · UTC dates · today is excluded

Insider purchases

Short history

Only 3 earlier periods are on file to compare with. We need at least 6 full periods before calling a count unusual.

Latest 28 days
0
Earlier median
0
Earlier range
0–2
Distinct filers per 28 daysScale: 0–2
Oct 22, 2025Oct 20, 2026
Earlier periodsLatest 28 daysEarlier median 0Limited or missing history

Who appears in the latest period?

No named filers on file for this period.

Up to three filers; one example disclosure each.

Inspect this period’s filings

The history behind this view

First stored company disclosure: Jun 17, 2026. Newest disclosure across this feed: Oct 16, 2026.

Earlier periods in the comparison: 3. Outlined periods are missing data, so they are left out of the comparison. The chart scale changes with the category.

Exact counts, dates and filings for all four categories
Insider purchases · Short history

Only 3 earlier periods are on file to compare with. We need at least 6 full periods before calling a count unusual. Earlier median: 0; range: 0–2.

Insider purchases: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 22, 2025–Nov 18, 2025—Unavailable
Nov 19, 2025–Dec 16, 2025—Unavailable
Dec 17, 2025–Jan 13, 2026—Unavailable
Jan 14, 2026–Feb 10, 2026—Unavailable
Feb 11, 2026–Mar 10, 2026—Unavailable
Mar 11, 2026–Apr 7, 2026—Unavailable
Apr 8, 2026–May 5, 2026—Unavailable
May 6, 2026–Jun 2, 2026—Unavailable
Jun 3, 2026–Jun 30, 20260Partial; excluded
Jul 1, 2026–Jul 28, 20260Within stored history
Jul 29, 2026–Aug 25, 20262Within stored history
Aug 26, 2026–Sep 22, 20260Within stored history
Sep 23, 2026–Oct 20, 2026Latest period0Within stored history
Insider sales · Short history

Only 3 earlier periods are on file to compare with. We need at least 6 full periods before calling a count unusual. Earlier median: 0; range: 0–1.

Insider sales: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 22, 2025–Nov 18, 2025—Unavailable
Nov 19, 2025–Dec 16, 2025—Unavailable
Dec 17, 2025–Jan 13, 2026—Unavailable
Jan 14, 2026–Feb 10, 2026—Unavailable
Feb 11, 2026–Mar 10, 2026—Unavailable
Mar 11, 2026–Apr 7, 2026—Unavailable
Apr 8, 2026–May 5, 2026—Unavailable
May 6, 2026–Jun 2, 2026—Unavailable
Jun 3, 2026–Jun 30, 20263Partial; excluded
Jul 1, 2026–Jul 28, 20260Within stored history
Jul 29, 2026–Aug 25, 20261Within stored history
Aug 26, 2026–Sep 22, 20260Within stored history
Sep 23, 2026–Oct 20, 2026Latest period0Within stored history
Congress purchases · History unavailable

No completed-period disclosures for this company are available in this source. Missing history is not zero activity. Earlier median: —; range: unavailable.

Congress purchases: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 22, 2025–Nov 18, 2025—Unavailable
Nov 19, 2025–Dec 16, 2025—Unavailable
Dec 17, 2025–Jan 13, 2026—Unavailable
Jan 14, 2026–Feb 10, 2026—Unavailable
Feb 11, 2026–Mar 10, 2026—Unavailable
Mar 11, 2026–Apr 7, 2026—Unavailable
Apr 8, 2026–May 5, 2026—Unavailable
May 6, 2026–Jun 2, 2026—Unavailable
Jun 3, 2026–Jun 30, 2026—Unavailable
Jul 1, 2026–Jul 28, 2026—Unavailable
Jul 29, 2026–Aug 25, 2026—Unavailable
Aug 26, 2026–Sep 22, 2026—Unavailable
Sep 23, 2026–Oct 20, 2026Latest period—Unavailable
Congress sales · History unavailable

No completed-period disclosures for this company are available in this source. Missing history is not zero activity. Earlier median: —; range: unavailable.

Congress sales: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 22, 2025–Nov 18, 2025—Unavailable
Nov 19, 2025–Dec 16, 2025—Unavailable
Dec 17, 2025–Jan 13, 2026—Unavailable
Jan 14, 2026–Feb 10, 2026—Unavailable
Feb 11, 2026–Mar 10, 2026—Unavailable
Mar 11, 2026–Apr 7, 2026—Unavailable
Apr 8, 2026–May 5, 2026—Unavailable
May 6, 2026–Jun 2, 2026—Unavailable
Jun 3, 2026–Jun 30, 2026—Unavailable
Jul 1, 2026–Jul 28, 2026—Unavailable
Jul 29, 2026–Aug 25, 2026—Unavailable
Aug 26, 2026–Sep 22, 2026—Unavailable
Sep 23, 2026–Oct 20, 2026Latest period—Unavailable
How to read this comparison

The median is the middle count in up to 12 earlier, non-overlapping 28-day periods; the range runs from the smallest to the largest count. The latest period is excluded from both. A comparison needs at least 6 earlier periods, including 3 with activity. The feed’s latest disclosure must be within 7 days of the current period’s end. This freshness check does not verify complete collection.

Insiders include individuals and reporting entities; only purchase and sale codes enter this view. Congress counts reporting members, including their disclosed family transactions. The same filer can appear in purchases and sales, so these categories should not be added into a net count.

These are stored disclosures, not a complete measure of trading. Reporting delays and collection gaps can change the comparison. More activity does not identify a motive or predict a stock’s return.

Company timeline

What has been happening?

May 1, 2026–Oct 16, 2026. Select a month in a category to inspect its records.

Company filings

Insiders

Owners & lobbying

All 20 records in this snapshot
  1. Filed
  2. Filed
  3. Filed
  4. Filed
  5. Filed
  6. Filed
  7. Filed
  8. Disclosed
    John James Sullivan · Sale

    Transaction dated Aug 13, 2026

  9. Disclosed
    R Tony Tripeny · Purchase

    Transaction dated Aug 13, 2026

  10. Disclosed
    Siddhartha Kadia · Purchase

    Transaction dated Aug 13, 2026

  11. Filed
  12. Disclosed
    Brian David Archbold · Sale

    Transaction dated Jun 22, 2026

  13. Disclosed
    John Sakys · Sale

    Transaction dated Jun 22, 2026

  14. Disclosed
    Lyndsey Elizabeth Crennen · Sale

    Transaction dated Jun 22, 2026

  15. Filed
  16. Filed
  17. Disclosed
    Brian David Archbold · Sale

    Transaction dated Jun 16, 2026

  18. Disclosed
    John Sakys · Sale

    Transaction dated Jun 16, 2026

  19. Disclosed
    Lyndsey Elizabeth Crennen · Sale

    Transaction dated Jun 16, 2026

  20. Filed

Month counts include every record on file. The lists show the newest records on this page. A dash means none on file that month. Trades use disclosure dates; contract dates follow the source record. Nearby events do not establish the cause of a price move.

Who's buying and selling · last 90 days

Congress

No Congress trades on MLAB disclosed in the last 90 days.

See every Congress trade on MLAB →

Company insiders

2 buys · 1 sell · $800K sold · $902K bought

  1. ▼ SELLJohn James Sullivan DirectorMLAB Mesa Laboratories Inc$800Kdisclosed Aug 17 · filed 4 days after the trade
  2. ▲ BUYSiddhartha Kadia President and CEOMLAB Mesa Laboratories Inc$800Kdisclosed Aug 17 · filed 4 days after the trade
  3. ▲ BUYR Tony Tripeny DirectorMLAB Mesa Laboratories Inc$102Kdisclosed Aug 17 · filed 4 days after the trade
See every insider trade on MLAB →

Big holders (Schedule 13D / 13G): 1 filing in the last 90 days · newest: Wasatch Advisors LP (13G), Oct 9, 2026 ↗

Filings & events

Company filings (8-K) 56

Events the company must report to the SEC within days — results, deals, departures, restatements.

What it files 8-Ks about

  • Quarterly or yearly results · item 2.0211
  • Shared information with investors · item 7.015
  • Shareholder vote results · item 5.074
  • Directors or officers joined, left or got new pay · item 5.024
  • Took on new debt · item 2.032
  • Signed a major agreement · item 1.012

Filing red flags 13

Warning signs in the company's own SEC filings — going-concern doubts, control weaknesses, staff comment letters, late filings, restatements, Wells notices, clinical holds, dividend cuts.

Planned insider sales (Form 144) 14

Notices insiders file before they sell certain shares, such as ones they got straight from the company.

2 in the last 90 days · 14 notices on file

The notices on file don't give the sale's size; each sale shows up under company insiders once it is reported.

5% owners (13D / 13G) 2

Investors who reported owning 5% or more — 13D for owners who may push for changes, 13G for owners who just hold.

Push for changes, or just hold?

  • 13G, just holds: 2 filings

Filed by Wasatch Advisors LP · Long Path Smaller Companies Fund, LP

Biggest named funds (13F)

The largest MLAB holdings among the well-known funds whose quarterly 13F filings we read — opens here.

Every disclosed trade on MLAB

  1. ▼ SELLJohn James Sullivan DirectorMLAB Mesa Laboratories Inc$800Kdisclosed Aug 17 · filed 4 days after the trade
  2. ▲ BUYSiddhartha Kadia President and CEOMLAB Mesa Laboratories Inc$800Kdisclosed Aug 17 · filed 4 days after the trade
  3. ▲ BUYR Tony Tripeny DirectorMLAB Mesa Laboratories Inc$102Kdisclosed Aug 17 · filed 4 days after the trade
  4. ▼ SELLLyndsey Elizabeth Crennen CAOMLAB Mesa Laboratories Inc$39.6Kdisclosed Jun 23 · filed 1 day after the trade
  5. ▼ SELLJohn Sakys CFOMLAB Mesa Laboratories Inc$253Kdisclosed Jun 23 · filed 1 day after the trade
  6. ▼ SELLBrian David Archbold SVP OperationsMLAB Mesa Laboratories Inc$225Kdisclosed Jun 23 · filed 1 day after the trade
  7. ▼ SELLBrian David Archbold SVP OperationsMLAB Mesa Laboratories Inc$117Kdisclosed Jun 17 · filed 1 day after the trade
  8. ▼ SELLLyndsey Elizabeth Crennen CAOMLAB Mesa Laboratories Inc$11.9Kdisclosed Jun 17 · filed 1 day after the trade
  9. ▼ SELLJohn Sakys CFOMLAB Mesa Laboratories Inc$124Kdisclosed Jun 17 · filed 1 day after the trade
See the trades on MLAB in the feed →
People & votes

Which members of Congress traded MLAB, sponsored bills that touch it and voted on them — opens here.