Mercury Systems (MRCY) CFO sells 3,625 shares for tax withholding

Rhea-AI Filing Summary

Mercury Systems EVP and CFO David E. Farnsworth reported an open-market sale of 3,625 shares of common stock. Footnotes state the shares were sold under a sell-to-cover program to satisfy tax withholding obligations when stock awards vested, rather than as a discretionary sale.

After this transaction, he holds 157,701 shares directly and 1,419 shares indirectly through a 401K Plan, indicating he retains a substantial equity stake in the company.

Insider Trade Summary

Net Seller: 3,625 shares ($307,661)

Net Sell 2 txns

Insider Farnsworth David E.

Role EVP, CFO

Sold 3,625 shs ($308K)

Type	Security	Shares	Price	Value
Sale	Common Stock	3,625	$84.8719	$308K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 157,701 shares (Direct); Common Stock — 1,419 shares (Indirect, 401K Plan)

Footnotes (1)

1. Represents shares sold as part of a sell-to-cover program to satisfy tax withholding obligations upon the vesting of stock awards. Represents the per share price attributed to sales of shares on behalf of all participants under the sell-to-cover program on the transaction date indicated.

Key Figures

Shares sold: 3,625 shares Sale price per share: $84.8719 per share Direct holdings after transaction: 157,701 shares +1 more

4 metrics

Shares sold 3,625 shares Open-market sale on 2026-04-16 as part of sell-to-cover

Sale price per share $84.8719 per share Attributed price for sell-to-cover sales on transaction date

Direct holdings after transaction 157,701 shares Direct common stock ownership following reported sale

Indirect holdings after transaction 1,419 shares Indirect ownership through 401K Plan after reported activity

Key Terms

sell-to-cover program, tax withholding obligations, stock awards, 401K Plan

4 terms

sell-to-cover program financial

"Represents shares sold as part of a sell-to-cover program to satisfy tax withholding obligations"

tax withholding obligations financial

"to satisfy tax withholding obligations upon the vesting of stock awards"

stock awards financial

"upon the vesting of stock awards"

401K Plan financial

"nature_of_ownership": "401K Plan""

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED 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^*

Farnsworth David E.

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP, CFO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/16/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form 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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	04/16/2026		S		3,625(1)	D	$84.8719(2)	157,701	D
Common Stock								1,419	I	401K 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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents shares sold as part of a sell-to-cover program to satisfy tax withholding obligations upon the vesting of stock awards.

2. Represents the per share price attributed to sales of shares on behalf of all participants under the sell-to-cover program on the transaction date indicated.

	/s/ Douglas Munro, attorney-in-fact	04/17/2026
	** Signature of Reporting Person	Date
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)