STOCK TITAN

Mercury Systems (MRCY) EVP Ratner sells 2,000 shares, holds 32,238

Filing Impact
(Moderate)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Mercury Systems EVP and CHRO Steven Ratner reported an open-market sale of company stock. On May 11, 2026, he sold 2,000 shares of Mercury Systems common stock at $92.46 per share, leaving him with 32,238 directly held shares and 287 shares held indirectly through a 401K plan.

Positive

  • None.

Negative

  • None.
Insider Ratner Steven
Role EVP, CHRO
Sold 2,000 shs ($185K)
Type Security Shares Price Value
Sale Common Stock 2,000 $92.46 $185K
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 32,238 shares (Direct, null); Common Stock — 287 shares (Indirect, 401K Plan)
Footnotes (1)
Shares sold 2,000 shares Open-market sale of common stock on May 11, 2026
Sale price per share $92.46 per share Price for 2,000 sold shares of common stock
Direct holdings after transaction 32,238 shares Common stock directly owned following the sale
Indirect holdings after transaction 287 shares Common stock held through a 401K plan
open-market sale financial
"transaction_action: "open-market sale" for 2,000 shares of Common Stock"
An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.
Common Stock financial
"security_title: "Common Stock" in the reported transactions"
Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.
401K Plan financial
"nature_of_ownership: "401K Plan" for indirect holdings of 287 shares"
A 401(k) plan is an employer-sponsored retirement savings account that lets workers set aside part of their paycheck into investments, often with tax breaks and sometimes with matching contributions from the employer. Think of it as a workplace piggy bank that grows through employee contributions, optional company top-ups, and market returns; it matters to investors because it shapes household retirement security, drives large flows of money into public markets, and affects a company’s compensation costs and ability to attract and keep talent.
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Ratner Steven

(Last)(First)(Middle)
50 MINUTEMAN ROAD

(Street)
ANDOVER MASSACHUSETTS 01810

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
MERCURY SYSTEMS INC [ MRCY ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
EVP, CHRO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/11/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock05/11/2026S2,000D$92.4632,238D
Common Stock287I401K Plan
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
/s/ Douglas Munro, attorney-in-fact05/12/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Mercury Systems (MRCY) disclose for Steven Ratner?

Mercury Systems reported that EVP and CHRO Steven Ratner sold 2,000 shares of common stock in an open-market transaction. The sale occurred on May 11, 2026, and was disclosed on a Form 4 insider trading report filed with regulators.

How many Mercury Systems (MRCY) shares did Steven Ratner sell and at what price?

Steven Ratner sold 2,000 shares of Mercury Systems common stock at a price of $92.46 per share. This transaction was classified as an open-market sale and is recorded as a non-derivative transaction on his Form 4 filing.

How many Mercury Systems (MRCY) shares does Steven Ratner hold after the reported sale?

After selling 2,000 shares, Steven Ratner holds 32,238 shares of Mercury Systems common stock directly. In addition, he has 287 shares reported as indirectly owned through a 401K plan, according to the Form 4 insider transaction report.

What type of transaction was reported for Mercury Systems (MRCY) insider Steven Ratner?

The filing shows an open-market sale of common stock by Steven Ratner, coded as “S” for sale. It covers 2,000 non-derivative shares and reflects a routine disposition rather than an option exercise or other derivative-related transaction.

Does Steven Ratner hold Mercury Systems (MRCY) stock indirectly as well as directly?

Yes. In addition to 32,238 directly owned shares, Steven Ratner has 287 shares reported as indirectly owned through a 401K plan. This indirect position is listed separately in the Form 4 as a holding entry with indirect ownership.