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Mesa Laboratories Inc

MLAB
Exchange
Nasdaq
Industry
Industrial Instruments For Measurement, Display, and Control
SEC CIK
0000724004

In the last 90 days, Mesa Laboratories Inc insiders filed 2 open-market purchases and 1 sale; 159 institutions reported holding it in 13F filings for Q2 2026, worth $500.8M in total; no superinvestor holds it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by Mesa Laboratories Inc insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
2 filings
2 insiders, $902.4K in total
Open-market sells
1 filing
1 insider, $800.1K in total
Insiders trading
3
Net value
+$102.3K
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for Mesa Laboratories Inc, current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for Mesa Laboratories Inc
NameTitleLast reported holdingLast filingFilings, past year
Capone Mark ChristopherDirector6,213Sep 11, 20263
Ladiwala Shiraz ShabanaliDirector12,333Sep 11, 20263
Alltoft Jennifer SadieDirector7,662Sep 11, 20262
Hall ShannonDirector6,973Sep 11, 20262
Sullivan John JamesDirector20,618Sep 11, 20264
Tripeny R TonyDirector9,082Sep 11, 20264
Kadia SiddharthaPresident and CEO7,093IndirectAug 17, 20262
Sakys JohnCFO19,785Jun 23, 20263
Archbold Brian DavidSVP Operations6,377Jun 23, 20263
Crennen Lyndsey ElizabethCAO2,020Jun 23, 20262
Owens Gary MPresident and CEO64,135Apr 2, 20262
Schmieder John BradleyDirector62,760Sep 19, 20230
Guillemin EvanDirector29,207Sep 2, 20220
Dinoia GregorySVP Commercial3,634Jun 22, 20220
Mesa Laboratories IncDirector29,788Jun 16, 20220
Kelly David MDirector2,600Nov 9, 20210

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Aug 17, 2026 (view filing)12:18 PM ETAug 134 daysSullivan John JamesDirectorSSale−7.09K$112.80−$800.1K−28.5%17.8K after
Aug 17, 2026 (view filing)11:49 AM ETAug 134 daysKadia SiddharthaPresident and CEOPPurchase+7.09K$112.80+$800.1KNew position7.09K after
Aug 17, 2026 (view filing)11:27 AM ETAug 134 daysTripeny R TonyDirectorPPurchase+900$113.69+$102.3K+16.7%6.30K after
Jun 23, 2026 (view filing)Jun 221 dayCrennen Lyndsey ElizabethCAOSSale−442$89.50−$39.6K−18.0%2.02K after
Jun 23, 2026 (view filing)Jun 221 dayArchbold Brian DavidSVP OperationsSSale−2.52K$89.50−$225.2K−28.3%6.38K after
Jun 23, 2026 (view filing)Jun 221 daySakys JohnCFOSSale−2.83K$89.50−$253.0K−12.5%19.8K after
Jun 17, 2026 (view filing)Jun 161 dayArchbold Brian DavidSVP OperationsSSale−1.15K$101.27−$116.6K−23.7%3.71K after10b5-1
Jun 17, 2026 (view filing)Jun 161 dayCrennen Lyndsey ElizabethCAOSSale−118$101.27−$11.9K−7.4%1.47K after10b5-1
Jun 17, 2026 (view filing)Jun 161 daySakys JohnCFOSSale−1.22K$101.27−$123.9K−6.9%16.5K after10b5-1
Mar 10, 2026 (view filing)Mar 10Same dayLadiwala Shiraz ShabanaliDirectorPPurchase+3.50K$72.23+$252.8K+69.7%8.52K after
Mar 10, 2026 (view filing)Mar 10Same dayCapone Mark ChristopherDirectorPPurchase+1.30K$76.35+$99.3K+61.1%3.43K after
Mar 10, 2026 (view filing)Mar 10Same dayTripeny R TonyDirectorPPurchase+1.31K$76.00+$99.9K+32.2%5.40K after
Jun 18, 2025 (view filing)Jun 162 daysOwens Gary MPresident and CEOSSale−1.94K$97.12−$188.3K−4.1%45.8K after
Jun 18, 2025 (view filing)Jun 162 daysArchbold Brian DavidSVP OperationsSSale−472$97.12−$45.8K−45.8%558 after
Jun 18, 2025 (view filing)Jun 162 daysSakys JohnCFOSSale−642$97.12−$62.4K−4.8%12.9K after
Mar 24, 2025 (view filing)Mar 195 daysLateOwens Gary MPresident and CEOSSale−21.0K$123.91−$2.60M−32.6%43.3K after10b5-1
Oct 29, 2024 (view filing)Oct 28-291 dayOwens Gary MPresident and CEOSSale−5.07K$112.79−$571.8K−10.5%43.3K after2 lots
Sep 16, 2024 (view filing)Sep 133 daysArchbold Brian DavidSVP OperationsSSale−1.50K$125.00−$187.4K−100.0%0 after10b5-1
Dec 19, 2023 (view filing)Dec 154 daysArchbold Brian DavidSVP OperationsSSale−1.50K$112.36−$168.5K−72.9%558 after10b5-1
Sep 19, 2023 (view filing)Sep 14-155 daysLateSchmieder John BradleyDirectorSSale−4.00K$123.22−$492.9K−6.0%62.8K after2 lots10b5-1
Sep 14, 2023 (view filing)Sep 131 daySchmieder John BradleyDirectorSSale−3.00K$123.32−$370.0K−4.3%66.8K after10b5-1
Sep 5, 2023 (view filing)Sep 14 daysOwens Gary MPresident and CEOSSale−2.00K$142.82−$285.6K−6.2%30.0K after10b5-1
Mar 27, 2023 (view filing)Mar 22-245 daysLateSakys JohnCFOSSale−4.63K$169.50−$784.4K−32.3%9.70K after3 lots
Mar 16, 2023 (view filing)Mar 151 daySakys JohnCFOSSale−1.00K$165.71−$165.7K−9.3%9.70K after
Mar 9, 2023 (view filing)Mar 9Same daySakys JohnCFOSSale−400$169.97−$68.0K−4.0%9.70K after
Feb 9, 2023 (view filing)Feb 9Same daySakys JohnCFOSSale−1.00K$184.27−$184.3K−9.3%9.70K after
Jan 25, 2023 (view filing)Jan 232 daysSakys JohnCFOSSale−2.10K$210.19−$441.4K−17.8%9.70K after
Jan 17, 2023 (view filing)Jan 134 daysSchmieder John BradleyDirectorSSale−1.57K$191.31−$300.5K−2.2%69.0K afterAmended
Dec 9, 2022 (view filing)Dec 81 dayHall ShannonDirectorSSale−230$174.98−$40.2K−19.4%957 after
Nov 21, 2022 (view filing)Nov 1110 daysLateSchmieder John BradleyDirectorSSale−2.50K$175.45−$438.6K−3.5%69.0K after
Aug 19, 2022 (view filing)Aug 181 dayGuillemin EvanDirectorSSale−3.69K$196.12−$724.1K−11.4%28.8K after
Aug 17, 2022 (view filing)Aug 152 daysSakys JohnCFOSSale+628$200.54+$125.9K+6.7%10.1K afterAmended
Aug 17, 2022 (view filing)Aug 161 daySakys JohnCFOSSale−1.37K$200.58−$275.2K−13.7%8.68K afterAmended
Aug 9, 2022 (view filing)Aug 9Same dayTripeny R TonyDirectorPPurchase+500$200.00+$100.0KNew position500 after
Jun 22, 2022 (view filing)Jun 211 dayOwens Gary MPresident and CEOSSale−1.76K$188.22−$330.5K−7.5%21.6K after
Jun 22, 2022 (view filing)Jun 211 dayArchbold Brian DavidSVP OperationsSSale−392$188.22−$73.8K−32.5%813 after
Jun 22, 2022 (view filing)Jun 211 dayDinoia GregorySVP CommercialSSale−555$188.22−$104.5K−13.2%3.63K after
Jun 22, 2022 (view filing)Jun 211 daySakys JohnCFOSSale−722$188.22−$135.9K−7.7%8.68K after
Jun 13, 2022 (view filing)Jun 76 daysSullivan John JamesDirectorSSale−5.19K$207.76−$1.08M−17.9%23.9K afterAmended
Apr 22, 2022 (view filing)Apr 202 daysSakys JohnCFOSSale−72$250.44−$18.0K−0.9%7.51K after
Mar 25, 2022 (view filing)Mar 23-242 daysSakys JohnCFOSSale−1.60K$251.23−$402.0K−17.6%7.51K after2 lots
Feb 16, 2022 (view filing)Feb 151 daySullivan John JamesDirectorSSale−5.19K$259.42−$1.35M−18.5%22.9K after
Jan 4, 2022 (view filing)Jan 31 daySchmieder John BradleyDirectorSSale−1.00K$327.77−$327.8K−1.4%71.0K after
Dec 15, 2021 (view filing)Dec 141 dayArchbold Brian DavidSVP OperationsSSale−1.66K$325.02−$539.2K−91.5%154 after
Dec 10, 2021 (view filing)Dec 10Same daySakys JohnCFOSSale−1.76K$324.74−$570.9K−19.0%7.51K after
Dec 6, 2021 (view filing)Dec 24 daysGuillemin EvanDirectorSSale−2.32K$310.61−$720.6K−7.2%29.8K after
Nov 16, 2021 (view filing)Nov 151 daySullivan John JamesDirectorSSale−5.19K$308.02−$1.60M−19.2%21.9K after
Nov 12, 2021 (view filing)Nov 111 daySakys JohnCFOSSale−1.00K$317.12−$317.1K−11.7%7.51K after
Nov 9, 2021 (view filing)Nov 81 dayKelly David MDirectorSSale−18$324.07−$5.83K−0.7%2.60K after
Nov 9, 2021 (view filing)Nov 81 dayDinoia GregorySVP CommercialSSale−280$323.72−$90.6K−9.4%2.69K after