MLAB insider buying and SEC filings, explained
Mesa Laboratories Inc. · CIK 724004
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$1.4M
Insiders who bought
4
Sold (not marked 10b5-1)
$1.1M
Planned sales (10b5-1)
$505K
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Aug 13, 2026 | Sale | John James Sullivan (Director) sold 7,093 shares at $112.80 ($800K). Holdings down 28% to 17,834 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 17, 2026 |
| Aug 13, 2026 | Purchase (code P) | Siddhartha Kadia (CEO) bought 7,093 shares indirectly (by trust) at $112.80 ($800K), reported as a purchase (code P). New position of 7,093 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 17, 2026 |
| Aug 13, 2026 | Purchase (code P) | R Tony Tripeny (Director) bought 900 shares at $113.69 ($102K), reported as a purchase (code P). Holdings up 17% to 6,298 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 17, 2026 |
| Jun 22, 2026 | Sale | Lyndsey Elizabeth Crennen (CAO) sold 442 shares at $89.50 ($40K). Holdings down 18% to 2,020 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 23, 2026 |
| Jun 22, 2026 | Sale | Brian David Archbold (SVP Operations) sold 2,516 shares at $89.50 ($225K). Holdings down 28% to 6,377 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 23, 2026 |
| Jun 22, 2026 | Planned (10b5-1) | John Sakys (CFO) sold 2,827 shares at $89.50 ($253K), marked as a 10b5-1 plan trade. Holdings down 13% to 19,785 shares. | SEC filing Filed Jun 23, 2026 |
| Jun 16, 2026 | Planned (10b5-1) | Brian David Archbold (SVP Operations) sold 1,151 shares at $101.27 ($117K), marked as a 10b5-1 plan trade. Holdings down 24% to 3,710 shares. | SEC filing Filed Jun 17, 2026 |
| Jun 16, 2026 | Planned (10b5-1) | Lyndsey Elizabeth Crennen (CAO) sold 118 shares at $101.27 ($12K), marked as a 10b5-1 plan trade. Holdings down 7% to 1,473 shares. | SEC filing Filed Jun 17, 2026 |
| Jun 16, 2026 | Planned (10b5-1) | John Sakys (CFO) sold 1,223 shares at $101.27 ($124K), marked as a 10b5-1 plan trade. Holdings down 7% to 16,538 shares. | SEC filing Filed Jun 17, 2026 |
| Mar 10, 2026 | Purchase (code P) | Shiraz Shabanali Ladiwala (Director) bought 3,500 shares at $72.23 ($253K), reported as a purchase (code P). Holdings up 70% to 8,523 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 10, 2026 |
| Mar 10, 2026 | Purchase (code P) | Mark Christopher Capone (Director) bought 1,301 shares at $76.35 ($99K), reported as a purchase (code P). Holdings up 61% to 3,429 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 10, 2026 |
| Mar 10, 2026 | Purchase (code P) | R Tony Tripeny (Director) bought 1,315 shares at $76.00 ($100K), reported as a purchase (code P). Holdings up 32% to 5,398 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 10, 2026 |
21 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
2 insiders bought in 30 days
$902K in purchases since Aug 13, 2026 · Purchases traded Aug 13, 2026 to Aug 13, 2026 · Closed
| Insider | Value | Traded | Source |
|---|---|---|---|
| R Tony Tripeny (Director) | $102K | Aug 13, 2026 | SEC filing |
| Siddhartha Kadia (CEO) | $800K | Aug 13, 2026 | SEC filing |
3 insiders bought in 30 days
$452K in purchases since Mar 10, 2026 · Purchases traded Mar 10, 2026 to Mar 10, 2026 · Closed
| Insider | Value | Traded | Source |
|---|---|---|---|
| R Tony Tripeny (Director) | $100K | Mar 10, 2026 | SEC filing |
| Mark Christopher Capone (Director) | $99K | Mar 10, 2026 | SEC filing |
| Shiraz Shabanali Ladiwala (Director) | $253K | Mar 10, 2026 | SEC filing |
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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