Mesa Labs (MLAB) SVP Brian Archbold Exercises Options, Receives RSUs

What Happened
Brian D. Archbold, SVP of Operations at Mesa Laboratories (MLAB), exercised non-qualified stock options on June 15, 2026 to acquire 2,454 shares at an exercise price of $104.08 per share (total cash paid $255,412). The Form 4 also reports the expiration of 1,780 short derivative positions and a reported disposition of 2,454 derivative units at $0 related to the conversion mechanics. In addition, Archbold was awarded 4,328 restricted stock units (RSUs) on the same date.

Key Details

• Transaction date: 2026-06-15 (reported on Form 4 filed 2026-06-16).
• Option exercise: 2,454 shares acquired at $104.08 per share; total ≈ $255,412 (code M).
• Derivative adjustments: 1,780 short derivative positions expired (code E); 2,454 derivative units reported disposed at $0 (code M, derivative line).
• RSU grant: 4,328 RSUs awarded (code A); each RSU represents a contingent right to one share.
• Footnotes from the filing: F1—NSOs vested 1/3 on each anniversary of the June 15, 2020 grant; F2—each RSU equals a contingent right to one common share; F3/F5—RSU vesting schedules (one schedule vests 1/3 on June 15, 2026 and each of the next two anniversaries; another schedule vests 34%/33%/33% across 2027–2029).
• Shares owned after the transaction: not specified in the provided summary.
• Filing timeliness: reported the next day (no late filing flag was indicated).

Context

• The primary economic action was an option exercise (cash paid for shares), not an open-market purchase or sale; this is typically a mechanical conversion of vested options into stock.
• The RSU award is a grant that vests over future dates per the stated schedules and does not represent immediate market purchases or sales.
• Derivative disposition/expiration lines in Form 4 often reflect option conversion/expiry mechanics and do not necessarily indicate a sale of underlying shares for cash.