JANA Seeks Antitrust Early Termination For Mercury, Separates Request From Any Board Dispute
The investor reported approximately 6.4% beneficial ownership and said its existing antitrust clearance was nearing expiration.
JANA Partners Management requested early termination under federal antitrust law Tuesday because its existing clearance for Mercury Systems, which makes processing electronics for aerospace and defense, was nearing expiration. In an amended SEC ownership disclosure, JANA said the request was unrelated to disagreements with Mercury, its management or its board over operations, policies or practices.
A 6.4% Position, No Recent Trades
JANA reported 3,880,671 shares on the beneficial-ownership basis used by the SEC, representing approximately 6.4% of the common stock. That percentage uses Mercury's reported 60,863,586 shares outstanding as of September 1, 2026.
Funds managed by JANA hold the investment. The reported aggregate purchase cost was approximately $118 million—a measure of money invested, rather than the position's current market value. JANA reported no Mercury share transactions during the past 60 days.
The request falls under the Hart-Scott-Rodino Antitrust Improvements Act of 1976. JANA's investment predates that request: its original SEC ownership disclosure was filed on September 22, 2022.
Board Awards Count Toward Ownership
The reported position includes 9,542 deferred stock units—awards that become shares—granted to board member Mr. Ostfeld for his service. He assigned JANA the rights to shares issued under those awards.
Of those units, 7,194 have vested. Another 2,348 were granted Wednesday, October 28, 2026, and are scheduled to vest on whichever comes first: the grant's first anniversary or Mercury's next annual shareholder meeting.
Vesting alone does not turn the units into shares. Conversion occurs when Ostfeld leaves the board, linking part of JANA's reported ownership to his board service.
Electronics For Defense And Aerospace
Mercury supplies components, modules and integrated subsystems used to process signals and data in radar, sensors, electronic warfare, avionics and weapons. Its customers include U.S. and European defense prime contractors, the U.S. government and commercial aerospace equipment makers.
The Andover, Massachusetts-based company reported fiscal 2026 revenue of $983.6 million. It operates Signal Technologies, Processing Technologies, Integrated Processing Solutions and a Europe, Middle East and Africa unit.
JANA's stated reason for the antitrust request was the approaching expiration of clearance; its reported investment remained approximately 6.4% on the SEC beneficial-ownership basis.
