Mercury Systems holder plans sale of 582 shares

Mercury Systems had a shareholder file a Form 144 notice to sell 582 shares of its common stock through Fidelity Brokerage Services on 02/17/2026, to be traded on NASDAQ.

Rhea-AI Filing Summary

Mercury Systems had a shareholder file a Form 144 notice to sell 582 shares of its common stock through Fidelity Brokerage Services on 02/17/2026, to be traded on NASDAQ. The filing lists an aggregate market value of 48629.25 for these shares, compared with 60014632 common shares outstanding.

The securities were acquired on 02/13/2026 via restricted stock vesting from the issuer as compensation, and the same date is shown as the payment date. The signer represents they are not aware of any undisclosed material adverse information about Mercury Systems.

FAQ

What does the Mercury Systems (MRCY) Form 144 filing disclose?

The filing discloses a planned sale of 582 Mercury Systems common shares through Fidelity Brokerage Services on 02/17/2026. These shares have an aggregate market value of 48629.25 and will be sold on NASDAQ under Rule 144 resale conditions.

How many Mercury Systems (MRCY) shares are planned to be sold and at what value?

The Form 144 shows a planned sale of 582 Mercury Systems common shares with an aggregate market value of 48629.25. This amount is reported against 60014632 common shares outstanding, indicating the notice covers a very small portion of the company’s equity.

When and how were the Mercury Systems (MRCY) shares in this Form 144 acquired?

The 582 shares were acquired on 02/13/2026 through restricted stock vesting from the issuer as compensation. The filing also lists 02/13/2026 as the date of payment, confirming the shares came from an equity compensation arrangement rather than an open-market purchase.

Which broker will handle the Mercury Systems (MRCY) Form 144 share sale?

The planned sale will be handled by Fidelity Brokerage Services LLC, listed at 900 Salem Street, Smithfield, RI 02917. The securities to be sold are Mercury Systems common shares, and the filing identifies NASDAQ as the securities exchange for the transaction.

What representation does the seller make in the Mercury Systems (MRCY) Form 144?

The seller represents that they do not know any material adverse information about Mercury Systems’ current or prospective operations that has not been publicly disclosed. The form also warns that intentional misstatements or omissions can constitute Federal criminal violations under 18 U.S.C. 1001.

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Accepted by SEC EDGAR 02/17/2026 - 04:07 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0002011703
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	MERCURY SYSTEMS INC
SEC File Number	001-41194
Address of Issuer	50 MINUTEMAN ROAD ANDOVER MASSACHUSETTS 01810
Phone	9782561300
Name of Person for Whose Account the Securities are To Be Sold	Munro Douglas
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	582	48629.25	60014632	02/17/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	02/13/2026	Restricted Stock Vesting	Issuer			582	02/13/2026	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks	Sale includes an amount necessary to cover a tax obligation resulting from the settlement of a vested equity award distribution.
Date of Notice	02/17/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Douglas Munro
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)