Mesa Laboratories, Inc. (MLAB) Insider Trading

Over the last 3 months, MLAB insiders made 3 open-market buys and 0 sales, a net purchase of $452K (SEC Form 4). Multiple insiders bought within days of each other (cluster buying). Over the last 6 months, 125 institutions increased and 90 reduced their position (13F).

Insider Activity

Sentiment
100/100
Buys (3m)
3
Sells (3m)
0
Net (3m)
$452.1K
Insiders buyingCluster buying
Insider trades by month Buys Sells
Dec
Sep
Oct
Mar
Jun
Mar
Context3-month price +12.4%Institutions accumulating (13F)
DateInsiderTypeSharesPrice
May 19, 2026Kadia Siddharthaofficer: President and CEOGrant35,236
Apr 24, 2026Kadia Siddharthaofficer: President and CEOGrant34,807
Mar 10, 2026Ladiwala Shiraz ShabanalidirectorBuy3,500$72.23
Mar 10, 2026Tripeny R TonydirectorBuy1,315$76.00
Mar 10, 2026Capone Mark ChristopherdirectorBuy1,301$76.35
Oct 28, 2025Owens Gary Mofficer: President and CEOOption11,558
Aug 18, 2025Hall ShannondirectorOption1,404
Aug 18, 2025Sullivan John JamesdirectorOption1,404
Aug 18, 2025Hall ShannondirectorGrant2,784
Aug 18, 2025Capone Mark ChristopherdirectorOption1,404
Aug 18, 2025Ladiwala Shiraz ShabanalidirectorOption1,949
Aug 18, 2025Ladiwala Shiraz ShabanalidirectorGrant3,810
Aug 18, 2025Sullivan John JamesdirectorGrant2,784
Aug 18, 2025Alltoft Jennifer SadiedirectorOption1,404
Aug 18, 2025Alltoft Jennifer SadiedirectorGrant2,784
Aug 18, 2025Tripeny R TonydirectorGrant2,784
Aug 18, 2025Capone Mark ChristopherdirectorGrant2,784
Aug 18, 2025Tripeny R TonydirectorOption1,404
Jun 25, 2025Sakys Johnofficer: CFOTax454$95.82
Jun 25, 2025Archbold Brian Davidofficer: SVP OperationsTax385$95.82
Jun 25, 2025Archbold Brian Davidofficer: SVP OperationsOption844$95.82
Jun 25, 2025Sakys Johnofficer: CFOOption1,036$95.82
Jun 24, 2025Owens Gary Mofficer: President and CEOOption3,301$95.82
Jun 24, 2025Owens Gary Mofficer: President and CEOTax1,445$95.82
Jun 20, 2025Sakys Johnofficer: CFOOption2,840$92.99
Jun 20, 2025Sakys Johnofficer: CFOTax1,243$92.99
Jun 20, 2025Owens Gary Mofficer: President and CEOOption8,707$92.99
Jun 20, 2025Archbold Brian Davidofficer: SVP OperationsTax1,166$92.99
Jun 20, 2025Archbold Brian Davidofficer: SVP OperationsOption2,556
Jun 20, 2025Owens Gary Mofficer: President and CEOTax3,810$92.99

Source: MLAB SEC Form 4 filings, latest May 19, 2026. For informational purposes only — not investment advice.

Institutional activity (13F)

How institutions changed their MLAB positions over the last 6 months (SEC Form 13F).

Increased
125
New positions
51
Reduced
90
Sold out
30
Largest moves
InstitutionActionSharesFiled
LONG PATH PARTNERS LPIncreased406KMay 14, 2026
BLACKROCK, INC.Increased399KFeb 12, 2026
BLACKROCK, INC.Reduced394KMay 13, 2026
VANGUARD GROUP INCIncreased322KJan 29, 2026
BOSTON PARTNERSIncreased269KMay 11, 2026
SELECT EQUITY GROUP, L.P.Increased236KMay 15, 2026
VANGUARD CAPITAL MANAGEMENT LLCNew Position233KMay 15, 2026
LONG PATH PARTNERS LPNew Position227KFeb 17, 2026
BOSTON PARTNERSIncreased213KFeb 13, 2026
SELECT EQUITY GROUP, L.P.Increased206KFeb 17, 2026
RANGER INVESTMENT MANAGEMENT, L.P.Reduced205KFeb 13, 2026
RANGER INVESTMENT MANAGEMENT, L.P.Reduced203KMay 15, 2026
GENEVA CAPITAL MANAGEMENT LLCReduced179KFeb 12, 2026
MORGAN STANLEYReduced176KFeb 13, 2026
AQR CAPITAL MANAGEMENT LLCIncreased171KMay 15, 2026

Source: SEC Form 13F filings. For informational purposes only — not investment advice.