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Mercury Systems Inc. planned insider sales

In the twelve months since 11 October 2025 insiders at Mercury Systems Inc. filed 35 Form 144 notices of planned sales, 474,185 shares worth $43.8 million at the time of filing, from 8 sellers. The latest, filed 21 September 2026: Kupinsky Stuart (officer), 1,000 shares worth $86,520, planned for around 21 September 2026 through Fidelity Brokerage Services LLC.

FiledSellerRelationshipSharesValuePlanned saleBrokerHow acquiredFiling
21 September 2026Kupinsky StuartOfficer1,000$86,52021 September 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
3 September 2026Ratner StevenOfficer4,000$338,0303 September 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
26 August 2026Ballhaus William LOfficer, Director49,090$4.4 million26 August 2026Fidelity Brokerage Services LLCStock Option ExerciseForm 144
25 August 2026Ballhaus William LOfficer, Director111,076$9.7 million25 August 2026Fidelity Brokerage Services LLCStock Option ExerciseForm 144
24 August 2026Ballhaus William LOfficer, Director8,088$729,96524 August 2026Fidelity Brokerage Services LLCStock Option ExerciseForm 144
24 August 2026Ballhaus William LOfficer, Director100,121$9.0 million24 August 2026Fidelity Brokerage Services LLCStock Option ExerciseForm 144
21 August 2026Kupinsky StuartOfficer1,000$95,23021 August 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
21 August 2026Ballhaus William LOfficer, Director65,000$6.0 million21 August 2026Fidelity Brokerage Services LLCStock Option ExerciseForm 144
20 August 2026Munro DouglasOfficer109$10,64620 August 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
20 August 2026Ratner StevenOfficer1,026$100,21320 August 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
20 August 2026Farnsworth David E.Officer6,612$645,81720 August 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
20 August 2026Ballhaus William LOfficer, Director22,010$2.1 million20 August 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
19 August 2026Munro DouglasOfficer548$54,96819 August 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
19 August 2026Kupinsky StuartOfficer1,308$131,20019 August 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
19 August 2026Ratner StevenOfficer2,187$219,36919 August 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
19 August 2026Farnsworth David E.Officer8,155$817,99519 August 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
19 August 2026Ballhaus William LOfficer, Director26,802$2.7 million19 August 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
18 August 2026Munro DouglasOfficer494$55,01118 August 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
18 August 2026Kupinsky StuartOfficer1,178$131,17918 August 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
18 August 2026Ratner StevenOfficer1,971$219,48618 August 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
18 August 2026Farnsworth David E.Officer7,347$818,14518 August 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
18 August 2026Ballhaus William LOfficer, Director24,144$2.7 million18 August 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
17 August 2026Munro DouglasOfficer404$44,42017 August 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
17 August 2026Ratner StevenOfficer1,084$119,18717 August 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
17 August 2026Kupinsky StuartOfficer1,195$131,39117 August 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
17 August 2026Farnsworth David E.Officer1,345$147,88417 August 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
17 August 2026Ballhaus William LOfficer, Director3,536$388,78617 August 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
12 May 2026Carvalho Orlando DDirector7,000$625,52712 May 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
11 May 2026Ratner StevenOfficer2,000$184,92011 May 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
16 April 2026Farnsworth David E.Officer3,625$307,66116 April 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
25 February 2026Lance Howard LDirector4,832$429,96025 February 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
17 February 2026Munro DouglasOfficer582$48,62917 February 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
17 February 2026Kupinsky StuartOfficer2,287$191,09117 February 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
12 November 2025Munro DouglasOfficer1,329$97,57012 November 2025Fidelity Brokerage Services LLCESPP Purchase; Restricted Stock VestingForm 144
7 November 2025Plunkett Debora ADirector1,700$125,7847 November 2025Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
A Form 144 is the notice an insider files with the SEC before selling restricted or control shares over the Rule 144 thresholds; it says what may be sold, not what was.
Read moreValue is the filer's own aggregate market value. Whether the sale happened shows up later on Form 4, on the insiders page.

Source

Form 144 filings on EDGAR for Mercury Systems Inc.: the company's filing index, each notice read from its own XML.

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