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)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| May 19, 2026 | Kadia Siddharthaofficer: President and CEO | Grant | 35,236 | — |
| Apr 24, 2026 | Kadia Siddharthaofficer: President and CEO | Grant | 34,807 | — |
| Mar 10, 2026 | Ladiwala Shiraz Shabanalidirector | Buy | 3,500 | $72.23 |
| Mar 10, 2026 | Tripeny R Tonydirector | Buy | 1,315 | $76.00 |
| Mar 10, 2026 | Capone Mark Christopherdirector | Buy | 1,301 | $76.35 |
| Oct 28, 2025 | Owens Gary Mofficer: President and CEO | Option | 11,558 | — |
| Aug 18, 2025 | Hall Shannondirector | Option | 1,404 | — |
| Aug 18, 2025 | Sullivan John Jamesdirector | Option | 1,404 | — |
| Aug 18, 2025 | Hall Shannondirector | Grant | 2,784 | — |
| Aug 18, 2025 | Capone Mark Christopherdirector | Option | 1,404 | — |
| Aug 18, 2025 | Ladiwala Shiraz Shabanalidirector | Option | 1,949 | — |
| Aug 18, 2025 | Ladiwala Shiraz Shabanalidirector | Grant | 3,810 | — |
| Aug 18, 2025 | Sullivan John Jamesdirector | Grant | 2,784 | — |
| Aug 18, 2025 | Alltoft Jennifer Sadiedirector | Option | 1,404 | — |
| Aug 18, 2025 | Alltoft Jennifer Sadiedirector | Grant | 2,784 | — |
| Aug 18, 2025 | Tripeny R Tonydirector | Grant | 2,784 | — |
| Aug 18, 2025 | Capone Mark Christopherdirector | Grant | 2,784 | — |
| Aug 18, 2025 | Tripeny R Tonydirector | Option | 1,404 | — |
| Jun 25, 2025 | Sakys Johnofficer: CFO | Tax | 454 | $95.82 |
| Jun 25, 2025 | Archbold Brian Davidofficer: SVP Operations | Tax | 385 | $95.82 |
| Jun 25, 2025 | Archbold Brian Davidofficer: SVP Operations | Option | 844 | $95.82 |
| Jun 25, 2025 | Sakys Johnofficer: CFO | Option | 1,036 | $95.82 |
| Jun 24, 2025 | Owens Gary Mofficer: President and CEO | Option | 3,301 | $95.82 |
| Jun 24, 2025 | Owens Gary Mofficer: President and CEO | Tax | 1,445 | $95.82 |
| Jun 20, 2025 | Sakys Johnofficer: CFO | Option | 2,840 | $92.99 |
| Jun 20, 2025 | Sakys Johnofficer: CFO | Tax | 1,243 | $92.99 |
| Jun 20, 2025 | Owens Gary Mofficer: President and CEO | Option | 8,707 | $92.99 |
| Jun 20, 2025 | Archbold Brian Davidofficer: SVP Operations | Tax | 1,166 | $92.99 |
| Jun 20, 2025 | Archbold Brian Davidofficer: SVP Operations | Option | 2,556 | — |
| Jun 20, 2025 | Owens Gary Mofficer: President and CEO | Tax | 3,810 | $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
| Institution | Action | Shares | Filed |
|---|---|---|---|
| LONG PATH PARTNERS LP | Increased | 406K | May 14, 2026 |
| BLACKROCK, INC. | Increased | 399K | Feb 12, 2026 |
| BLACKROCK, INC. | Reduced | 394K | May 13, 2026 |
| VANGUARD GROUP INC | Increased | 322K | Jan 29, 2026 |
| BOSTON PARTNERS | Increased | 269K | May 11, 2026 |
| SELECT EQUITY GROUP, L.P. | Increased | 236K | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 233K | May 15, 2026 |
| LONG PATH PARTNERS LP | New Position | 227K | Feb 17, 2026 |
| BOSTON PARTNERS | Increased | 213K | Feb 13, 2026 |
| SELECT EQUITY GROUP, L.P. | Increased | 206K | Feb 17, 2026 |
| RANGER INVESTMENT MANAGEMENT, L.P. | Reduced | 205K | Feb 13, 2026 |
| RANGER INVESTMENT MANAGEMENT, L.P. | Reduced | 203K | May 15, 2026 |
| GENEVA CAPITAL MANAGEMENT LLC | Reduced | 179K | Feb 12, 2026 |
| MORGAN STANLEY | Reduced | 176K | Feb 13, 2026 |
| AQR CAPITAL MANAGEMENT LLC | Increased | 171K | May 15, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.