StockCIK 724004
MESA LABORATORIES INC /CO/ (MLAB): Insider Trades and Fund Holdings
In the past 12 months, MESA LABORATORIES INC /CO/ insiders reported 2 open-market purchases worth $902K and 1 sale worth $800K; 0 of the sales were reported as made under a 10b5-1 trading plan.
2Insider buys, 12 months
$902KBought by insiders, 12 months
$800KSold by insiders, 12 months
1Tracked funds holding
Recent insider trades
Open-market purchases (code P) and sales (code S) from Form 4. Grants, option exercises and gifts are not shown. Latest filing: Aug 17, 2026.
| Filed | Insider | Type | Value |
|---|---|---|---|
| Aug 17 | Siddhartha KadiaCEO | ▲ BUY | $800K |
| Aug 17 | John James SullivanDirector | ▼ SELL | $800K |
| Aug 17 | R. Tony TripenyDirector | ▲ BUY | $102K |
Source: SEC Form 4 filings, retrieved Oct 28, 2026. How we read filings
Insiders who traded in the past year
| Insider | Role | Buys | Bought | Sells | Sold |
|---|---|---|---|---|---|
| Siddhartha Kadia | CEO | 1 | $800K | 0 | $0 |
| John James Sullivan | Director | 0 | $0 | 1 | $800K |
| R. Tony Tripeny | Director | 1 | $102K | 0 | $0 |
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Tracked funds that report MLAB
From each fund's latest 13F. Holdings are as of quarter end and are filed up to 45 days later.
| Fund | Shares | Value | Change |
|---|---|---|---|
| Renaissance Technologies | 28,900 | $2.88M | ▼ −8.5% |
Source: SEC Form 13F-HR filings, retrieved Oct 28, 2026. How we read filings
Reading these numbers
Insiders sell for many reasons: taxes, diversification, a house. Purchases with their own money are rarer and are usually read as more informative. A Form 4 is due within two business days of the trade. How to read a Form 4 →