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MERCURY SYSTEMS INC (MRCY) is the issuer for which Steven V. Ratner has filed a Notice of Proposed Sale of Securities on Form 144. Ratner plans to sell up to 4,000 shares of Mercury Systems common stock through Fidelity Brokerage Services LLC, with an aggregate market value of $338,030.40 as of September 3, 2026 on NASDAQ.
The filing lists shares expected to come from restricted stock vesting grants of 2,183, 1,117, and 700 shares scheduled to vest on August 18, 2025, August 14, 2026, and August 17, 2026, respectively. It also reports recent sales in the prior three months, including 2,187 shares sold for $219,369.22 on August 19, 2026.
MERCURY SYSTEMS INC (MRCY) reported that Chairman, President & CEO William L. Ballhaus exercised employee stock options covering 222,152 shares of common stock at an exercise price of $43.00 per share on August 25–26, 2026, from grants scheduled to expire on August 17, 2027. He then sold a total of 160,166 shares of common stock in multiple trades at weighted average prices between roughly $87.09 and $89.74 per share. A footnote states these sales were intended solely to cover the exercise price, applicable withholding taxes and related transaction costs of the options exercised on the same dates. Following these transactions, indirect holdings reported include 1,403 shares in a 401(k) plan and 7,066.173 shares held by Milestone Road Holdings, LLC.
MERCURY SYSTEMS INC (MRCY) is the issuer for which William L. Ballhaus filed a Rule 144 notice to sell common stock. The filing covers 49,090 shares of common stock, with an aggregate market value of $4,373,744.65, relative to 60,136,133 shares outstanding as of 08/26/2026. The shares are to be sold through Fidelity Brokerage Services LLC and arise from a stock option exercise categorized as compensation. The notice also lists multiple prior open-market sales by Ballhaus over the past three months, including 108,209 shares on 08/24/2026 and 111,076 shares on 08/25/2026.
For MERCURY SYSTEMS INC (MRCY), executive vice president and chief human resources officer Steven Ratner reported a sale of 356 shares of common stock on 2026-08-21 at $91.36 per share through an account identified as a 401K Plan, reported as indirect ownership. After these transactions, he reported holding 23,275 shares directly.
MERCURY SYSTEMS INC (MRCY) executive Stuart Kupinsky, EVP, CLO & Corp Sec, reported selling 1,000 shares of the company’s Common Stock on 2026-08-21 at $95.23 per share in an open-market or private transaction. The sale was effected pursuant to a Rule 10b5-1 trading plan adopted on May 7, 2026. After this transaction, he reported 56,352 shares held directly and 1,233 shares held indirectly through a 401K Plan.
MERCURY SYSTEMS INC (MRCY) reported that Chairman, President & CEO William L. Ballhaus exercised employee stock options for a total of 244,848 shares of common stock on August 21 and 24, 2026 at exercise prices of $42.00 and $43.00 per share. He then sold 173,209 shares of common stock in market transactions at weighted average prices ranging from the high $80s to low $90s per share; a footnote states these sales were intended solely to cover the option exercise price, applicable withholding taxes and related transaction costs. Following these transactions, indirect holdings reported include 1,403 shares in a 401(k) plan and 7,066.173 shares held by Milestone Road Holdings, LLC.
MERCURY SYSTEMS INC (MRCY) is the issuer for a planned sale of restricted or control common stock under Rule 144 by William L. Ballhaus through Fidelity Brokerage Services LLC. The notice covers 111,076 common shares, with an aggregate market value of $9,676,608.39 and issuer shares outstanding of 60,136,133 as of 08/25/2026.
The shares are tied to a stock option exercise for which the issuer is listed as the counterparty and cash as the form of payment, with a proposed sale date of 08/25/2026 on NASDAQ. Ballhaus has already sold multiple blocks of MRCY common stock in the prior three months, each disclosed with dates, share counts and dollar amounts.
MERCURY SYSTEMS INC (MRCY) is the issuer for a notice under Rule 144 filed for the account of William L. Ballhaus. The notice covers a proposed sale of 8,088 shares of common stock, with an aggregate market value of $729,964.73, when 60,136,133 shares of common stock were outstanding on 08/24/2026. The shares to be sold were acquired on 08/24/2026 through a stock option exercise paid in cash. In the prior three months, Ballhaus reported multiple sales of MRCY common stock totaling several tranches between 3,536 and 65,000 shares on dates from 08/17/2026 to 08/21/2026.
MERCURY SYSTEMS INC (MRCY) is the issuer for which William L. Ballhaus filed a notice of proposed sale of common stock under Rule 144. The notice lists a proposed sale of 100,121 shares of common stock, to be sold through Fidelity Brokerage Services LLC on NASDAQ, with the shares to be acquired via stock option exercise for cash on 08/24/2026.
The filing also reports prior sales of MERCURY SYSTEMS INC common stock by William Ballhaus during the past three months, including transactions on 08/17/2026, 08/18/2026, 08/19/2026, 08/20/2026, and 08/21/2026, with share amounts and aggregate dollar values disclosed for each date.
MERCURY SYSTEMS INC (MRCY) reported that officer Douglas Munro, SVP and Chief Accounting Officer, sold a total of 657 shares of common stock in August 2026. These sales were executed under a sell-to-cover program to satisfy tax withholding obligations upon the vesting of stock awards, and not as discretionary open‑market sales.