MLAB
Mesa Laboratories Inc
NASDAQ: MLAB · TECHNOLOGY · SCIENTIFIC & TECHNICAL INSTRUMENTS
$131.32
+1.60% today
Updated 2026-10-28
Market cap
$719.97M
P/E ratio
151.36
P/S ratio
2.88x
EPS (TTM)
$0.85
Dividend yield
0.50%
52W range
$69 – $144
Volume
0.1M
Mesa Laboratories Inc (MLAB) Insider transactions
Net insider activity
Net buying (105,315 shares)
Buy transactions
52
Sell transactions
48
All transactions
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-09-09 | TRIPENY, R TONY | Director | Buy | 1,774 | — | — |
| 2026-09-09 | SULLIVAN, JOHN JAMES | Director | Buy | 1,774 | — | — |
| 2026-09-09 | LADIWALA, SHIRAZ SHABANALI | Director | Buy | 2,510 | — | — |
| 2026-09-09 | HALL, SHANNON | Director | Buy | 1,774 | — | — |
| 2026-09-09 | CAPONE, MARK CHRISTOPHER | Director | Buy | 2,423 | — | — |
| 2026-08-15 | TRIPENY, R TONY | Director | Sale | 2,784 | — | — |
| 2026-08-15 | TRIPENY, R TONY | Director | Buy | 2,784 | — | — |
| 2026-08-15 | SULLIVAN, JOHN JAMES | Director | Sale | 2,784 | — | — |
| 2026-08-15 | SULLIVAN, JOHN JAMES | Director | Buy | 2,784 | — | — |
| 2026-08-15 | LADIWALA, SHIRAZ SHABANALI | Director | Sale | 3,810 | — | — |
| 2026-08-15 | LADIWALA, SHIRAZ SHABANALI | Director | Buy | 3,810 | — | — |
| 2026-08-15 | HALL, SHANNON | Director | Sale | 2,784 | — | — |
| 2026-08-15 | HALL, SHANNON | Director | Buy | 2,784 | — | — |
| 2026-08-15 | CAPONE, MARK CHRISTOPHER | Director | Sale | 2,784 | — | — |
| 2026-08-15 | CAPONE, MARK CHRISTOPHER | Director | Buy | 2,784 | — | — |
| 2026-08-15 | ALLTOFT, JENNIFER SADIE | Director | Sale | 2,784 | — | — |
| 2026-08-15 | ALLTOFT, JENNIFER SADIE | Director | Buy | 2,784 | — | — |
| 2026-08-13 | TRIPENY, R TONY | Director | Buy | 900 | $113.69 | $102321.00 |
| 2026-08-13 | SULLIVAN, JOHN JAMES | Director | Sale | 7,093 | $112.80 | $800090.40 |
| 2026-08-13 | KADIA, SIDDHARTHA | President and CEO | Buy | 7,093 | $112.80 | $800090.40 |
| 2026-06-22 | SAKYS, JOHN | CFO | Sale | 2,827 | $89.50 | $253022.15 |
| 2026-06-22 | CRENNEN, LYNDSEY ELIZABETH | CAO | Sale | 442 | $89.50 | $39559.88 |
| 2026-06-22 | ARCHBOLD, BRIAN DAVID | SVP Operations | Sale | 2,516 | $89.50 | $225187.03 |
| 2026-06-18 | SAKYS, JOHN | CFO | Sale | 2,756 | — | — |
| 2026-06-18 | SAKYS, JOHN | CFO | Sale | 1,036 | — | — |
| 2026-06-18 | SAKYS, JOHN | CFO | Buy | 2,756 | $95.10 | $262095.60 |
| 2026-06-18 | SAKYS, JOHN | CFO | Buy | 2,282 | $95.10 | $217018.20 |
| 2026-06-18 | SAKYS, JOHN | CFO | Buy | 1,036 | $95.10 | $98523.60 |
| 2026-06-18 | CRENNEN, LYNDSEY ELIZABETH | CAO | Sale | 368 | — | — |
| 2026-06-18 | CRENNEN, LYNDSEY ELIZABETH | CAO | Sale | 233 | — | — |
| 2026-06-18 | CRENNEN, LYNDSEY ELIZABETH | CAO | Sale | 125 | — | — |
| 2026-06-18 | CRENNEN, LYNDSEY ELIZABETH | CAO | Buy | 368 | $95.10 | $34996.80 |
| 2026-06-18 | CRENNEN, LYNDSEY ELIZABETH | CAO | Buy | 263 | $95.10 | $25011.30 |
| 2026-06-18 | CRENNEN, LYNDSEY ELIZABETH | CAO | Buy | 233 | $95.10 | $22158.30 |
| 2026-06-18 | CRENNEN, LYNDSEY ELIZABETH | CAO | Buy | 125 | $95.10 | $11887.50 |
| 2026-06-18 | ARCHBOLD, BRIAN DAVID | SVP Operations | Sale | 2,480 | — | — |
| 2026-06-18 | ARCHBOLD, BRIAN DAVID | SVP Operations | Sale | 844 | — | — |
| 2026-06-18 | ARCHBOLD, BRIAN DAVID | SVP Operations | Buy | 2,480 | $95.10 | $235848.00 |
| 2026-06-18 | ARCHBOLD, BRIAN DAVID | SVP Operations | Buy | 1,859 | $95.10 | $176790.90 |
| 2026-06-18 | ARCHBOLD, BRIAN DAVID | SVP Operations | Buy | 844 | $95.10 | $80264.40 |
| 2026-06-16 | SAKYS, JOHN | CFO | Sale | 1,223 | $101.27 | $123849.54 |
| 2026-06-16 | CRENNEN, LYNDSEY ELIZABETH | CAO | Sale | 118 | $101.27 | $11949.51 |
| 2026-06-16 | ARCHBOLD, BRIAN DAVID | SVP Operations | Sale | 1,151 | $101.27 | $116558.32 |
| 2026-06-15 | SAKYS, JOHN | CFO | Sale | 2,717 | — | — |
| 2026-06-15 | SAKYS, JOHN | CFO | Buy | 8,416 | — | — |
| 2026-06-15 | SAKYS, JOHN | CFO | Sale | 3,951 | — | — |
| 2026-06-15 | SAKYS, JOHN | CFO | Buy | 2,717 | $104.08 | $282785.36 |
| 2026-06-15 | ARCHBOLD, BRIAN DAVID | SVP Operations | Sale | 2,454 | — | — |
| 2026-06-15 | ARCHBOLD, BRIAN DAVID | SVP Operations | Buy | 4,328 | — | — |
| 2026-06-15 | ARCHBOLD, BRIAN DAVID | SVP Operations | Sale | 1,780 | — | — |
| 2026-06-15 | ARCHBOLD, BRIAN DAVID | SVP Operations | Buy | 2,454 | $104.08 | $255412.32 |
| 2026-04-14 | KADIA, SIDDHARTHA | President and CEO | Buy | 35,236 | — | — |
| 2026-04-14 | KADIA, SIDDHARTHA | President and CEO | Buy | 34,807 | — | — |
| 2026-03-31 | OWENS, GARY M | President and CEO | Sale | 8,211 | — | — |
| 2026-03-10 | TRIPENY, R TONY | Director | Buy | 1,315 | $76.00 | $99940.00 |
| 2026-03-10 | LADIWALA, SHIRAZ SHABANALI | Director | Buy | 3,500 | $72.23 | $252805.00 |
| 2026-03-10 | CAPONE, MARK CHRISTOPHER | Director | Buy | 1,301 | $76.35 | $99331.35 |
| 2025-12-02 | SULLIVAN, JOHN JAMES | Director | Sale | 2,000 | — | — |
| 2025-10-27 | OWENS, GARY M | President and CEO | Buy | 11,558 | — | — |
| 2025-08-15 | TRIPENY, R TONY | Director | Buy | 2,784 | — | — |
| 2025-08-15 | TRIPENY, R TONY | Director | Sale | 1,404 | — | — |
| 2025-08-15 | TRIPENY, R TONY | Director | Buy | 1,404 | — | — |
| 2025-08-15 | SULLIVAN, JOHN JAMES | Director | Sale | 1,404 | — | — |
| 2025-08-15 | SULLIVAN, JOHN JAMES | Director | Buy | 2,784 | — | — |
| 2025-08-15 | SULLIVAN, JOHN JAMES | Director | Buy | 1,404 | — | — |
| 2025-08-15 | LADIWALA, SHIRAZ SHABANALI | Director | Buy | 3,810 | — | — |
| 2025-08-15 | LADIWALA, SHIRAZ SHABANALI | Director | Sale | 1,949 | — | — |
| 2025-08-15 | LADIWALA, SHIRAZ SHABANALI | Director | Buy | 1,949 | — | — |
| 2025-08-15 | HALL, SHANNON | Director | Buy | 2,784 | — | — |
| 2025-08-15 | HALL, SHANNON | Director | Sale | 1,404 | — | — |
| 2025-08-15 | HALL, SHANNON | Director | Buy | 1,404 | — | — |
| 2025-08-15 | CAPONE, MARK CHRISTOPHER | Director | Buy | 2,784 | — | — |
| 2025-08-15 | CAPONE, MARK CHRISTOPHER | Director | Sale | 1,404 | — | — |
| 2025-08-15 | CAPONE, MARK CHRISTOPHER | Director | Buy | 1,404 | — | — |
| 2025-08-15 | ALLTOFT, JENNIFER SADIE | Director | Buy | 2,784 | — | — |
| 2025-08-15 | ALLTOFT, JENNIFER SADIE | Director | Sale | 1,404 | — | — |
| 2025-08-15 | ALLTOFT, JENNIFER SADIE | Director | Buy | 1,404 | — | — |
| 2025-06-21 | SAKYS, JOHN | CFO | Sale | 1,036 | — | — |
| 2025-06-21 | SAKYS, JOHN | CFO | Buy | 1,036 | $95.82 | $99269.52 |
| 2025-06-21 | SAKYS, JOHN | CFO | Sale | 454 | $95.82 | $43502.28 |
| 2025-06-21 | OWENS, GARY M | President and CEO | Sale | 3,301 | — | — |
| 2025-06-21 | OWENS, GARY M | President and CEO | Buy | 3,301 | $95.82 | $316301.82 |
| 2025-06-21 | OWENS, GARY M | President and CEO | Sale | 1,445 | $95.82 | $138459.90 |
| 2025-06-21 | ARCHBOLD, BRIAN DAVID | SVP Operations | Sale | 844 | — | — |
| 2025-06-21 | ARCHBOLD, BRIAN DAVID | SVP Operations | Buy | 844 | $95.82 | $80872.08 |
| 2025-06-21 | ARCHBOLD, BRIAN DAVID | SVP Operations | Sale | 385 | $95.82 | $36890.70 |
| 2025-06-18 | SAKYS, JOHN | CFO | Sale | 2,840 | — | — |
| 2025-06-18 | SAKYS, JOHN | CFO | Buy | 2,840 | $92.99 | $264091.60 |
| 2025-06-18 | SAKYS, JOHN | CFO | Sale | 1,243 | $92.99 | $115586.57 |
| 2025-06-18 | OWENS, GARY M | President and CEO | Sale | 8,707 | — | — |
| 2025-06-18 | OWENS, GARY M | President and CEO | Buy | 8,707 | $92.99 | $809663.93 |
| 2025-06-18 | OWENS, GARY M | President and CEO | Sale | 3,810 | $92.99 | $354291.90 |
| 2025-06-18 | ARCHBOLD, BRIAN DAVID | SVP Operations | Sale | 2,556 | — | — |
| 2025-06-18 | ARCHBOLD, BRIAN DAVID | SVP Operations | Buy | 2,556 | $92.99 | $237682.44 |
| 2025-06-18 | ARCHBOLD, BRIAN DAVID | SVP Operations | Sale | 1,166 | $92.99 | $108426.34 |
| 2025-06-16 | SAKYS, JOHN | CFO | Sale | 642 | $97.12 | $62349.76 |
| 2025-06-16 | OWENS, GARY M | President and CEO | Sale | 1,939 | $97.12 | $188311.80 |
| 2025-06-16 | ARCHBOLD, BRIAN DAVID | SVP Operations | Sale | 472 | $97.12 | $45839.70 |
| 2025-06-15 | SAKYS, JOHN | CFO | Buy | 8,133 | — | — |
| 2025-06-15 | SAKYS, JOHN | CFO | Sale | 793 | — | — |
Frequently asked questions
Are MLAB insiders buying or selling?
Over the transactions on record, MLAB insiders have been net buyers, with about $2.66M in stock sold across 48 sales, against 23 open-market purchases.
Does insider selling at MLAB mean the stock will fall?
Not by itself. Most executive selling is pre-scheduled through 10b5-1 plans filed months in advance, and insiders sell for diversification, taxes, and liquidity far more often than out of any view on the price. Insider buying is the stronger signal, especially when several insiders buy around the same time, because there is usually only one reason to put personal cash into the stock.
Which MLAB insiders are selling the most?
Recent selling is concentrated in a few names. SULLIVAN, JOHN JAMES accounts for the largest share on record, with about $800090.40 sold. Selling by one or two individuals matters less than broad selling across the whole leadership team, which is the pattern worth watching.