Mercury Systems (MRCY) director Lance sells 4,832 shares in open market

Rhea-AI Filing Summary

Mercury Systems director Howard L. Lance sold common stock in the company. On February 25, 2026, he completed an open-market sale of 4,832 shares of Mercury Systems common stock at a weighted average price of $88.9817 per share, executed across multiple trades.

After this sale, Lance directly owned 27,272 common shares. In addition, 9,250 shares were held indirectly through The Howard L. Lance Revocable Living Trust dated September 1, 2006.

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

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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^*

LANCE HOWARD L

(Last) (First) (Middle)

50 MINUTEMAN ROAD

(Street)

ANDOVER MA 01810

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
MERCURY SYSTEMS INC [ MRCY ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

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

3. Date of Earliest Transaction (Month/Day/Year)
02/25/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

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

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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	02/25/2026		S		4,832	D	$88.9817(1)	27,272	D
Common Stock								9,250	I	By The Howard L. Lance Revocable Living Trust Dated 9/1/2006

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. This transaction was executed in multiple trades at prices ranging from $88.98 to $89.30. The price reported above reflects the weighted average price of these trades. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

	/s/ Douglas Munro, attorney-in-fact	02/27/2026
	** 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.

FAQ

What insider transaction did Mercury Systems (MRCY) report for Howard L. Lance?

Howard L. Lance reported an open-market sale of Mercury Systems shares. On February 25, 2026, he sold 4,832 shares of Mercury Systems common stock in multiple trades, at a weighted average price of $88.9817 per share, according to the Form 4.

How many Mercury Systems (MRCY) shares did Howard L. Lance sell and at what price?

Howard L. Lance sold 4,832 Mercury Systems common shares. The transaction occurred on February 25, 2026, as an open-market sale, with a weighted average sale price of $88.9817 per share, based on multiple individual trades within that price range.

How many Mercury Systems (MRCY) shares does Howard L. Lance own after the reported sale?

After the sale, Lance directly owned 27,272 Mercury Systems shares. The Form 4 also reports an additional 9,250 shares held indirectly through The Howard L. Lance Revocable Living Trust dated September 1, 2006, reflecting both direct and indirect holdings.

What type of transaction did Howard L. Lance execute in Mercury Systems (MRCY) stock?

The transaction was an open-market sale of common stock. The Form 4 lists transaction code “S,” indicating a sale in the open market or private transaction, with shares sold at a weighted average price of $88.9817 on February 25, 2026.

How are Howard L. Lance’s indirect Mercury Systems (MRCY) holdings structured?

Lance’s indirect holdings are held through a revocable living trust. The Form 4 identifies 9,250 Mercury Systems common shares held indirectly by The Howard L. Lance Revocable Living Trust dated September 1, 2006, separate from his 27,272 directly owned shares.

What does the Form 4 say about the pricing of Howard L. Lance’s Mercury Systems (MRCY) sale?

The sale price is reported as a weighted average. The transaction was executed in multiple trades between $88.98 and $89.30 per share, with the Form 4 disclosing a weighted average sale price of $88.9817 for the 4,832 sold shares.