Mercury Systems (MRCY) CEO William Ballhaus Receives 23,629 RSUs

What Happened

• William L. Ballhaus, Chairman, President & CEO and a director of Mercury Systems (MRCY), was granted 23,629 restricted stock units (RSUs) on August 17, 2026. The reported acquisition price is $0.00 (award), so no cash was exchanged in this grant. This Form 4 is an amendment filed on September 15, 2026 to correct the prior omission of this award.

Key Details

• Transaction date and type: 2026-08-17 — Grant/Award (code A) of 23,629 RSUs at $0.00.
• Report filed as an amendment on 2026-09-15 to disclose the August 17 grant.
• Vesting: Per footnote, the RSUs vest in equal annual increments over the three-year period following the grant date (roughly one-third per year).
• Shares owned after transaction: Not specified in the provided filing excerpt.
• Filing timeliness: This is an amended filing correcting an earlier omission; investors should note the late disclosure but consult the full SEC filing for official timestamps and any company commentary.

Context

• RSU grants are a form of compensation for executives. They are not a purchase or sale and do not by themselves indicate the insider is buying or selling stock. Vesting will determine when shares actually convert to stock and may be subject to tax withholding or company holding rules.