MESA LABORATORIES INC /CO/ (MLAB) stock: insider trades, news & valuation
Information Technology · Strong buyingShare price and insider trades
MESA LABORATORIES INC /CO/ insider trading at a glance (Oct 9, 2026): in the past 12 months, 4 insiders bought $1.4M and 4 sold $1.6M of MLAB stock on the open market, including a cluster buy that began Mar 10, 2026; P/E 150.0 vs. a sector median of 32.1.
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MLAB insider buying and selling by quarter
Open-market purchases (green, above the line) and sales (red, below), by trade date.
| Quarter | Bought | Purchases | Sold | Sales |
|---|---|---|---|---|
| Q4 2026 | — | 0 | — | 0 |
| Q3 2026 | $902K | 2 | $800K | 1 |
| Q2 2026 | — | 0 | $770K | 6 |
| Q1 2026 | $452K | 3 | — | 0 |
Valuation, profit and volume
Summary
Over the past 12 months, 4 MESA LABORATORIES INC /CO/ insiders reported open-market purchases totaling $1.4M, while 4 insiders reported sales totaling $1.6M. The most recent cluster buy began on Mar 10, 2026, when 3 insiders bought a combined $452K. Among insiders with enough purchase history to measure, R Tony Tripeny (Director) has the highest Insider Score at 75. 4 of 7 recorded sales were made under pre-scheduled Rule 10b5-1 trading plans, which are usually less informative than discretionary sales.
MLAB stock news and SEC filings
Recent 8-K filings and headlines. Tone is scored from the headline wording; “Policy” marks regulatory, trade or government topics.
- 8-K Shareholder vote results
- 8-K Earnings release
- 8-K Item 5.05
- 8-K Executive or board change
Insider transactions
Open-market purchases and sales.
| Filed | Insider | Type | Shares | Price | Value | Since | Score |
|---|---|---|---|---|---|---|---|
| Aug 17SEC | Siddhartha KadiaCEO, President | Buy | 7,093new position | $112.80 | $800K | +13.0% | — |
| Aug 17SEC | John James SullivanDirector | Sell | 7,09317,834 held (−28%) | $112.80 | $800K | +13.0% | — |
| Aug 17SEC | R Tony TripenyDirector | Buy | 9006,298 held (+17%) | $113.69 | $102K | +12.2% | 75 |
| Jun 23SEC | John SakysCFO | Sell Plan | 2,82719,785 held (−13%) | $89.50 | $253K | +42.5% | — |
| Jun 23SEC | Brian David ArchboldSvp Operations | Sell | 2,5166,377 held (−28%) | $89.50 | $225K | +42.5% | — |
| Jun 23SEC | Lyndsey Elizabeth CrennenCao | Sell | 4422,020 held (−18%) | $89.50 | $40K | +42.5% | — |
| Jun 17SEC | John SakysCFO | Sell Plan | 1,22316,538 held (−7%) | $101.27 | $124K | +25.9% | — |
| Jun 17SEC | Brian David ArchboldSvp Operations | Sell Plan | 1,1513,710 held (−24%) | $101.27 | $117K | +25.9% | — |
| Jun 17SEC | Lyndsey Elizabeth CrennenCao | Sell Plan | 1181,473 held (−7%) | $101.27 | $12K | +25.9% | — |
| Mar 10SEC | Shiraz Shabanali LadiwalaDirector | Buy | 3,5008,523 held (+70%) | $72.23 | $253K | +76.5% | — |
| Mar 10SEC | R Tony TripenyDirector | Buy | 1,3155,398 held (+32%) | $76.00 | $100K | +67.8% | 75 |
| Mar 10SEC | Mark Christopher CaponeDirector | Buy | 1,3013,429 held (+61%) | $76.35 | $99K | +67.0% | — |
Insiders at MESA LABORATORIES INC /CO/
| Insider | Bought | Sold | Last filing | Score |
|---|---|---|---|---|
| Siddhartha KadiaCEO, President | $800K | — | Aug 17, 2026 | — |
| John James SullivanDirector | — | $800K | Aug 17, 2026 | — |
| Shiraz Shabanali LadiwalaDirector | $253K | — | Mar 10, 2026 | — |
| R Tony TripenyDirector | $202K | — | Aug 17, 2026 | 75 |
| John SakysCFO | — | $377K | Jun 23, 2026 | — |
| Brian David ArchboldSvp Operations | — | $342K | Jun 23, 2026 | — |
| Mark Christopher CaponeDirector | $99K | — | Mar 10, 2026 | — |
| Lyndsey Elizabeth CrennenCao | — | $52K | Jun 23, 2026 | — |
Insider activity at other Information Technology companies
Same sector, ranked by insider buying in the last 90 days.
MLAB stock: common questions
Are MESA LABORATORIES INC /CO/ insiders buying MLAB stock?
In the past 12 months, 4 insiders reported open-market purchases of MLAB worth $1.4M. The latest was CEO, President Siddhartha Kadia bought $800K of MLAB at $112.80 — first open-market purchase in our records; opens a new position.
Are MESA LABORATORIES INC /CO/ insiders selling MLAB stock?
4 insiders reported sales worth $1.6M over the same period.
Where does this data come from?
Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.
What is MLAB's P/E ratio?
MLAB trades at about 150.0 times trailing earnings, compared with a median of 32.1 for the Information Technology sector.
What is MLAB's 52-week range?
Over the past year MLAB has traded between $67.29 and $142.23. It last closed at $127.51 on Oct 9, 2026.