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Mesa Laboratories ($MLAB) Insider Trading & Smart Money Activity

Mesa Laboratories, Inc. · Scientific & Technical Instruments · Latest filing Jun 22, 2026

Mesa Laboratories, Inc. ($MLAB) has 20 insider trades on file. In the last 12 months on the open market, no insider bought and 3 insiders sold ($770.12K), net -$770.12K.

Insider buyers (12 mo)
0
Insider sellers (12 mo)
3
Net insider $ (12 mo)
-$770.12K
Congress trades (12 mo)
0
13F moves on file
0
Analyst ratings on file
0

MLAB insider buying and selling by quarter

QuarterInsider buysInsider salesCongress buys / sales13F added / cut
Q1 2026 0 0 0 / 0 0 / 0
Q2 2026 0 6 · $770.12K 0 / 0 0 / 0
Q3 2026 0 0 0 / 0 0 / 0
Q4 2026 0 0 0 / 0 0 / 0

Insider buys and sales count open-market trades only (Form 4 codes P and S). Grants, option exercises and tax withholding are left out.

All MLAB insider, congress, 13F and analyst activity

DateSourceWhoActionSharesValue / amount ΔOwn1W1M6MFilingStory
Insider John SakysCFO Sell (Open-market sale) 2.83K sh $253.02K +6.8%+5.7% Read
Insider Crennen Lyndsey ElizabethCAO Sell (Open-market sale) 442 sh $39.56K +6.8%+5.7% Read
Insider Archbold Brian DavidSVP Operations Sell (Open-market sale) 2.52K sh $225.18K +6.8%+5.7% Read
Insider John SakysCFO Sell (Option exercise) 2.76K sh +3.2%+1.7% Read
Insider John SakysCFO Buy (Grant or award) 2.28K sh $217.02K +3.2%+1.7% Read
Insider Crennen Lyndsey ElizabethCAO Sell (Option exercise) 233 sh +3.2%+1.7% Read
Insider Crennen Lyndsey ElizabethCAO Buy (Grant or award) 263 sh $25.01K +3.2%+1.7% Read
Insider Archbold Brian DavidSVP Operations Sell (Option exercise) 2.48K sh +3.2%+1.7% Read
Insider Archbold Brian DavidSVP Operations Buy (Option exercise) 3.32K sh $316.11K +3.2%+1.7% Read
Insider John SakysCFO Sell (Open-market sale) 10b5-1 1.22K sh $123.85K -7.7%-0.2% Read
Insider Crennen Lyndsey ElizabethCAO Sell (Open-market sale) 10b5-1 118 sh $11.95K -7.7%-0.2% Read
Insider Archbold Brian DavidSVP Operations Sell (Open-market sale) 10b5-1 1.15K sh $116.56K -7.7%-0.2% Read
Insider John SakysCFO Sell (Option exercise) 2.72K sh -10.4%-9.0% Read
Insider John SakysCFO Sell 3.95K sh -10.4%-9.0% —
Insider John SakysCFO Buy (Grant or award) 8.42K sh -10.4%-9.0% Read
Insider John SakysCFO Buy (Grant or award) 8.42K sh -10.4%-9.0% —
Insider Archbold Brian DavidSVP Operations Sell (Option exercise) 2.45K sh -10.4%-9.0% Read
Insider Archbold Brian DavidSVP Operations Sell 1.78K sh -10.4%-9.0% —
Insider Archbold Brian DavidSVP Operations Buy (Grant or award) 4.33K sh -10.4%-9.0% Read
Insider Archbold Brian DavidSVP Operations Buy (Grant or award) 4.33K sh -10.4%-9.0% —

1W / 1M / 6M = how MLAB moved from the trade or filing date.

Insider trading in MLAB: who is buying and selling

InsiderRoleTradesOpen-market netShares heldLast trade
John Sakys CFO 8 -$376.87K Jun 22, 2026
Archbold Brian David SVP Operations 8 -$341.74K Jun 22, 2026
Crennen Lyndsey Elizabeth CAO 4 -$51.51K Jun 22, 2026

Frequently asked questions

Are MLAB insiders buying or selling?

Over the last 12 months 0 insiders made 0 open-market purchases worth $0 and 3 insiders made 6 open-market sales worth $770.12K, a net -$770.12K.

What is the latest insider trade in MLAB?

John Sakys, CFO filed a sell (open-market sale) of 2.83K sh worth $253.02K on Jun 22, 2026.

Other scientific & technical instruments stocks

All stocks Insider cluster buys Top insider purchases Congress 13F institutions

Data comes from public SEC Form 4 and 13F filings and STOCK Act disclosures. Dates are the trade or filing date reported. This page is for research only and is not investment advice.

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