Mesa Laboratories, Inc. (MLAB) Insider Trading
Over the last 3 months, MLAB insiders made 0 open-market buys and 6 sales, a net sale of -$770K (SEC Form 4). Over the last 6 months, 123 institutions increased and 89 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
6
Net (3m)
-$770.1K
Insider trades by month Buys Sells
Sep
Oct
Mar
Jun
Mar
Jun
Context3-month price +12.6%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Jun 23, 2026 | Archbold Brian Davidofficer: SVP Operations | Option | 2,480 | $95.10 |
| Jun 23, 2026 | Sakys Johnofficer: CFO | Option | 1,036 | $95.10 |
| Jun 23, 2026 | Crennen Lyndsey Elizabethofficer: CAO | Sell | 442 | $89.50 |
| Jun 23, 2026 | Sakys Johnofficer: CFO | Option | 2,756 | $95.10 |
| Jun 23, 2026 | Archbold Brian Davidofficer: SVP Operations | Sell | 2,516 | $89.50 |
| Jun 23, 2026 | Sakys Johnofficer: CFO | Sell | 2,827 | $89.50 |
| Jun 23, 2026 | Crennen Lyndsey Elizabethofficer: CAO | Option | 368 | $95.10 |
| Jun 23, 2026 | Archbold Brian Davidofficer: SVP Operations | Option | 844 | $95.10 |
| Jun 23, 2026 | Crennen Lyndsey Elizabethofficer: CAO | Option | 233 | $95.10 |
| Jun 23, 2026 | Crennen Lyndsey Elizabethofficer: CAO | Grant | 263 | $95.10 |
| Jun 23, 2026 | Crennen Lyndsey Elizabethofficer: CAO | Option | 125 | $95.10 |
| Jun 23, 2026 | Archbold Brian Davidofficer: SVP Operations | Grant | 1,859 | $95.10 |
| Jun 23, 2026 | Sakys Johnofficer: CFO | Grant | 2,282 | $95.10 |
| Jun 17, 2026 | Sakys Johnofficer: CFO | Sell | 1,223 | $101.27 |
| Jun 17, 2026 | Crennen Lyndsey Elizabethofficer: CAO | Sell | 118 | $101.27 |
| Jun 17, 2026 | Archbold Brian Davidofficer: SVP Operations | Sell | 1,151 | $101.27 |
| Jun 16, 2026 | Archbold Brian Davidofficer: SVP Operations | Option | 2,454 | $104.08 |
| Jun 16, 2026 | Sakys Johnofficer: CFO | Option | 2,717 | $104.08 |
| Jun 16, 2026 | Sakys Johnofficer: CFO | Grant | 8,416 | — |
| Jun 16, 2026 | Archbold Brian Davidofficer: SVP Operations | Grant | 4,328 | — |
| 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 | Capone Mark Christopherdirector | Buy | 1,301 | $76.35 |
| Mar 10, 2026 | Ladiwala Shiraz Shabanalidirector | Buy | 3,500 | $72.23 |
| Mar 10, 2026 | Tripeny R Tonydirector | Buy | 1,315 | $76.00 |
| Oct 28, 2025 | Owens Gary Mofficer: President and CEO | Option | 11,558 | — |
| Aug 18, 2025 | Ladiwala Shiraz Shabanalidirector | Grant | 3,810 | — |
| Aug 18, 2025 | Ladiwala Shiraz Shabanalidirector | Option | 1,949 | — |
| Aug 18, 2025 | Hall Shannondirector | Grant | 2,784 | — |
| Aug 18, 2025 | Alltoft Jennifer Sadiedirector | Grant | 2,784 | — |
Source: MLAB SEC Form 4 filings, latest Jun 23, 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
123
New positions
53
Reduced
89
Sold out
31
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 465K | May 15, 2026 |
| 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 |
| 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.