STOCK TITAN

Mercury Systems (MRCY) HR chief offloads 356 shares

(Neutral)
(Negative)
Form Type
4

Rhea-AI Filing Summary

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.

Positive

  • None.

Negative

  • None.
Insider Ratner Steven
Role EVP, CHRO
Sold 356 shs ($33K)
Type Security Shares Price Value
Sale Common Stock 356 $91.36 $33K
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 0 shares (Indirect, 401K Plan); Common Stock — 23,275 shares (Direct)
Shares sold 356 shares Common Stock sold on 2026-08-21
Sale price per share $91.36 per share Common Stock sale on 2026-08-21
Shares held after transaction (direct) 23,275 shares Directly owned Common Stock reported after 2026-08-21
Shares held after transaction (401K Plan) 0 shares Indirect ownership via 401K Plan after sale on 2026-08-21
Net shares sold 356 shares Net buy/sell shares across reported transactions
indirect ownership financial
"reported as indirect ownership through a 401K Plan"
401K Plan financial
"nature_of_ownership is listed as 401K Plan"
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.
Form 4 regulatory
"insider transaction did MRCY executive Steven Ratner report on this Form 4"
Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.
Rule 10b5-1 regulatory
"checkbox is not checked, indicating not pursuant to a Rule 10b5-1 plan"
Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

FAQ

What insider transaction did MRCY executive Steven Ratner report on this Form 4?

Steven Ratner reported a sale of 356 shares of MERCURY SYSTEMS INC common stock on 2026-08-21, executed at $91.36 per share, from an account identified as a 401K Plan and reported as indirect ownership.

What is Steven Ratner’s role at MERCURY SYSTEMS INC (MRCY)?

Steven Ratner is reported as an officer of MERCURY SYSTEMS INC, serving as EVP, CHRO (Executive Vice President, Chief Human Resources Officer) in this Form 4 filing.

How many MRCY shares did Steven Ratner sell and at what price?

Steven Ratner sold 356 shares of MERCURY SYSTEMS INC common stock at a price of $91.36 per share on 2026-08-21, according to the Form 4 transaction data.

How many MRCY shares does Steven Ratner report owning after the Form 4 transactions?

After the reported transactions, Steven Ratner reports 23,275 shares of MERCURY SYSTEMS INC common stock as directly owned, while the reported indirect 401K Plan position shows 0 shares following the sale.

Was the MRCY insider sale by Steven Ratner made under a Rule 10b5-1 trading plan?

The filing’s Rule 10b5-1 checkbox is not checked (aff_10b5_one is false), indicating the reported transaction was not affirmed as being made pursuant to a Rule 10b5-1 trading plan.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Learn about SEC filing dates
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)
08/21/2026
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 Stock08/21/2026S356D$91.360I401K Plan
Common Stock23,275D
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-fact08/25/2026
** 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)