MLAB insider trading — Mesa Laboratories Inc
Over the last 90 days, insiders at Mesa Laboratories Inc (MLAB) made 2 open-market purchases worth $902K and 1 open-market sale worth $800K, making them net buyers by $102K. The largest purchase was by Kadia Siddhartha (President and CEO), who bought 7,093 shares for $800K on Aug 13, 2026. The largest sale was by Sullivan John James (Director), who sold 7,093 shares for $800K on Aug 13, 2026. 2 different insiders bought shares in this period — a cluster buy, which many investors watch closely.
Updated Oct 16, 2026.
Recent MLAB insider transactions
Every Form 4 filed by Mesa Laboratories Inc officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Aug 15, 2026 | Capone Mark Christopher | Director | M · Option exercise | Direct | 2,784 | — | — | Form 4 |
| Aug 15, 2026 | Alltoft Jennifer Sadie | Director | M · Option exercise | Direct | 2,784 | — | — | Form 4 |
| Aug 15, 2026 | Ladiwala Shiraz Shabanali | Director | M · Option exercise | Direct | 3,810 | — | — | Form 4 |
| Aug 15, 2026 | Hall Shannon | Director | M · Option exercise | Direct | 2,784 | — | — | Form 4 |
| Aug 15, 2026 | Tripeny R Tony | Director | M · Option exercise | Direct | 2,784 | — | — | Form 4 |
| Aug 15, 2026 | Sullivan John James | Director | M · Option exercise | Direct | 2,784 | — | — | Form 4 |
| Aug 13, 2026 | Sullivan John James | Director | S · Sale | Direct | 7,093 | $112.80 | $800K | Form 4 |
| Aug 13, 2026 | Kadia Siddhartha | President and CEO | P · Purchase | Indirect | 7,093 | $112.80 | $800K | Form 4 |
| Aug 13, 2026 | Tripeny R Tony | Director | P · Purchase | Direct | 900 | $113.69 | $102K | Form 4 |
MLAB insider trading FAQ
Are insiders buying MLAB stock?
Yes. In the last 90 days, Mesa Laboratories Inc insiders made 2 open-market purchases totaling $902K, and 1 open-market sale totaling $800K. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading MLAB?
Recent buyers: Kadia Siddhartha, Tripeny R Tony. Recent sellers: Sullivan John James.
Where does MLAB insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
More stocks with insider activity
Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.