Douglas Munro, Senior Vice President and Chief Accounting Officer of Mercury Systems Inc, filed an amended Form 4/A on September 15, 2026, to correct the inadvertent omission of a restricted stock unit grant dated August 17, 2026, originally reported on August 19, 2026.

Key Highlights

  • Amendment purpose: The filing states it "is being filed to correct the inadvertent omission of the grant of restricted stock units to the reporting person on August 17, 2026."
  • RSU grant: Douglas Munro acquired 2,882 restricted stock units on August 17, 2026, at a price of $0, via transaction code A.
  • Vesting schedule: The RSUs vest "in equal annual increments over the three-year period following the grant date," according to the filing.
  • Resulting direct ownership: Following the transaction, Munro directly and beneficially owns 17,015 shares of common stock.
  • Indirect holdings: Munro also holds 359 shares indirectly through a 401K Plan, as reported in the filing.
  • Reporting person role: Munro is identified as SVP, CAO (Senior Vice President, Chief Accounting Officer) of Mercury Systems Inc, traded on NASDAQ:MRCY.

Douglas Munro's RSU Grant Added to the Record in Mercury Systems Amendment

Mercury Systems Inc (NASDAQ:MRCY) disclosed in the amended Form 4/A, signed by Douglas Munro on September 15, 2026, that an RSU award had been omitted from the original Form 4 filed on August 19, 2026. The amendment adds the grant of 2,882 restricted stock units to Munro on August 17, 2026, which were acquired at a price of $0 and are classified as a direct holding under transaction code A.

According to the filing, the RSUs will vest in equal annual increments over the three-year period following the grant date, meaning each tranche would vest annually starting in August 2027. Following the reported transaction, the filing shows Munro's direct beneficial ownership of Mercury Systems common stock stands at 17,015 shares. In addition to his direct holdings, the filing records 359 shares held indirectly through a 401K Plan.

No derivative securities transactions were reported in Table II of the filing. The amendment covers only the correction of the omitted RSU grant and does not indicate any other changes to Munro's previously reported positions.

What Was Disclosed

An amended beneficial ownership statement filed by Mercury Systems SVP, CAO Douglas Munro on September 15, 2026, added a previously omitted RSU grant of 2,882 units from August 17, 2026, bringing his direct share ownership to 17,015 shares.