A Form 4 filed on September 11, 2026, reports that John James Sullivan, a director of Mesa Laboratories Inc /CO/, acquired 1,774 restricted stock units on September 9, 2026.

Key Highlights

  • Reporting person: John James Sullivan, identified as a Director of Mesa Laboratories Inc /CO/ (NASDAQ:MLAB).
  • Transaction: Acquisition (code A) of 1,774 restricted stock units on September 9, 2026.
  • Price: The derivative securities were acquired at a price of $0.
  • Vesting date: The RSUs vest on September 9, 2027, according to the filing.
  • Post-transaction holding: Sullivan beneficially owns 1,774 RSUs following the reported transaction, held directly.
  • Underlying security: Each RSU represents a contingent right to receive one share of the issuer's common stock.

Mesa Laboratories Director Sullivan Acquires RSUs in September 2026 Grant

According to the Form 4 filed with the Securities and Exchange Commission on September 11, 2026, John James Sullivan, a director at Mesa Laboratories Inc /CO/ (NASDAQ:MLAB), received 1,774 restricted stock units on September 9, 2026. The filing indicates the transaction code is "A," reflecting an acquisition. The RSUs were received at a price of $0, as reported in Table II of the filing.

The filing discloses that each RSU "represents a contingent right to receive one share of the Issuer's common stock." The RSUs are reported to vest on September 9, 2027. Following this transaction, Sullivan directly holds 1,774 RSUs. No pre-existing RSU or common stock holdings are listed in the filing, making the 1,774 RSUs his entire reported beneficial ownership in this security class after the transaction.

The Form 4 was signed by John Sakys under Power of Attorney on behalf of John Sullivan and submitted on September 11, 2026. Sullivan's address is listed as 12100 W. 6th Avenue, Lakewood, Colorado 80228. No transactions were reported in Table I covering non-derivative securities.

What Was Disclosed

The filing discloses a single acquisition of 1,774 restricted stock units by Mesa Laboratories director John James Sullivan on September 9, 2026, at no cost, with vesting scheduled for September 9, 2027, and a resulting direct beneficial ownership of 1,774 RSUs.