Director Scott Ostfeld filed a Form 4 with the SEC on October 30, 2026, disclosing the acquisition of 2,348 deferred stock units of Mercury Systems Inc on October 28, 2026.

Key Highlights

  • Grant date: October 28, 2026, with 2,348 deferred stock units (DSUs) acquired at a price of $0.
  • Vesting schedule: DSUs vest on the earlier of the first anniversary of the grant date or the next annual meeting of shareholders.
  • Conversion condition: Vested DSUs do not convert into shares of common stock until Ostfeld ceases to be a member of the Board of Directors.
  • Assignment to JANA: Ostfeld has assigned all rights to any shares issuable under the grant to JANA Partners Management, LP, and settlement will be made to JANA upon vesting.
  • Indirect ownership: The 2,348 DSUs are held indirectly, with beneficial ownership attributed to JANA Partners Management, LP.
  • Section 16 change: The filing notes that, based on the current structure of JANA, JANA will no longer file as a director-by-deputization for purposes of Section 16 under the Securities Exchange Act of 1934.

Mercury Systems Director DSU Grant and JANA Assignment Details

According to the filing, Scott Ostfeld, identified as a Director of Mercury Systems Inc (NASDAQ:MRCY) and a Managing Partner and Portfolio Manager of JANA Partners Management, LP, received 2,348 deferred stock units on October 28, 2026, in connection with his service on the company's Board of Directors. The transaction code is listed as "A" (acquired), and the price per unit is reported as $0.

The filing discloses that the DSUs vest on the earlier of the first anniversary of the grant date or the date of the next annual meeting of shareholders. However, according to the filing, vested DSUs do not convert into shares of common stock until the date on which Ostfeld ceases to be a member of the Board of Directors. Ostfeld reported that he has assigned all rights to any shares issuable pursuant to the grant to JANA Partners Management, LP, and that settlement of the award on vesting will be made to JANA. As a result, the 2,348 DSUs are reported as indirectly owned.

The filing also includes a notable remark: "Based on the current structure of JANA, JANA will no longer file as a director-by-deputization for purposes of Section 16 under the Securities Exchange Act of 1934." The Form 4 was signed by Scott Ostfeld and dated October 30, 2026.

What Was Disclosed

Scott Ostfeld, a director of Mercury Systems Inc, disclosed a grant of 2,348 DSUs on October 28, 2026, assigned to JANA Partners Management, LP. The filing also noted that JANA will no longer file as a director-by-deputization under Section 16.