Mercury Systems (MRCY) Form 144: Insider Sale of 1,182 Shares ($78.6K)

Mercury Systems, Inc. (MRCY) filed a Form 144 notifying the proposed sale of 1,182 common shares held by an insider through Fidelity Brokerage Services LLC.

Rhea-AI Filing Summary

Mercury Systems, Inc. (MRCY) filed a Form 144 notifying the proposed sale of 1,182 common shares held by an insider through Fidelity Brokerage Services LLC. The shares have an aggregate market value of $78,622.27 based on the filing and represent a small fraction of the 59,915,670 shares outstanding. The securities were acquired on 08/15/2025 via restricted stock vesting and the filing lists the approximate sale date as 08/18/2025 on the NASDAQ. The filing states payment was for compensation and reports no other sales in the past three months.

Positive

• Timely regulatory compliance: Form 144 filed for the proposed sale with broker and timing details provided
• Small transaction size: 1,182 shares (~$78.6k) is immaterial relative to 59,915,670 shares outstanding
• Acquisition clearly disclosed: Securities were acquired via restricted stock vesting and paid as compensation

Negative

• Insider sale disclosed: A company insider is selling vested shares (though size is small)
• Short interval between vesting and proposed sale: Acquisition on 08/15/2025 with approximate sale 08/18/2025

Insights

Financial Analyst

TL;DR: Routine insider sale of vested restricted stock; size is immaterial to market capitalization.

The filing documents an insider disposing of 1,182 shares acquired through restricted stock vesting three days earlier. With an aggregate value of $78,622.27 against roughly 59.9 million shares outstanding, the transaction is immaterial to equity capitalization and unlikely to affect short-term share pricing. The disclosure is consistent with Rule 144 procedures and includes broker and timing details, meeting regulatory transparency expectations.

Corporate Governance Expert

TL;DR: Compliance-focused disclosure showing adherence to reporting and trading rules for insider sales.

The notice indicates the seller affirmed no undisclosed material information and identified the transaction as compensation-related restricted stock vesting. The use of Form 144 and a registered broker aligns with standard insider reporting practice under securities law. No related-party aggregation or recent sales were reported, reducing concerns about coordinated disposals or governance red flags in this filing.

FAQ

What did the MRCY Form 144 disclose about the proposed sale?

It disclosed a proposed sale of 1,182 common shares through Fidelity Brokerage Services LLC with aggregate value $78,622.27 and approximate sale date 08/18/2025.

How were the Mercury Systems shares acquired that are being sold?

The shares were acquired on 08/15/2025 by restricted stock vesting and payment was for compensation.

How material is the sale relative to Mercury Systems' share count?

The 1,182 shares represent a very small amount versus 59,915,670 shares outstanding, so the filing appears immaterial to market capitalization.

Did the filer report other sales in the past three months?

The filing states Nothing to Report for securities sold during the past three months.

On which exchange is the sale planned?

The approximate sale is listed for the NASDAQ exchange.

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

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Accepted by SEC EDGAR 08/18/2025 - 04:09 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	0001289593
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	KUPINSKY STUART
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	1182	78622.27	59915670	08/18/2025	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	08/15/2025	Restricted Stock Vesting	Issuer			1182	08/15/2025	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	08/18/2025
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 Stuart Kupinsky
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)