[144] MERCURY SYSTEMS INC SEC Filing

Rhea-AI Filing Summary

Mercury Systems (MRCY) Form 144 notifies the market of a proposed sale of 67 common shares through Fidelity Brokerage Services with an aggregate market value of $4,918.08. The filing states the shares were acquired on 09/15/2025 via restricted stock vesting and were granted as compensation. The approximate sale date is listed as 09/16/2025 and the shares trade on NASDAQ.

The filing also discloses prior sales by the same person: 363 shares sold on 08/18/2025 for $24,145.42 and 376 shares sold on 08/19/2025 for $24,238.38. Some issuer and filer identifying details are not provided in the form content supplied.

Positive

• Transaction details provided: trade date, broker, exchange, acquisition date, and nature of acquisition (restricted stock vesting) are disclosed
• Prior sales disclosed: two recent sales (363 and 376 shares) are listed, supporting transparency

Negative

• Filer/issuer identifying fields missing in the excerpt: CIK and relationship to issuer are not provided in the supplied content
• Notice date not included: the form text does not show the date of notice, limiting assessment of timeliness

Insights

Securities Analyst

TL;DR Routine insider notice for a small sale of vested compensation; not likely material to valuation.

The Form 144 shows a proposed sale of 67 shares valued at $4,918.08, acquired through restricted stock vesting and designated as compensation. The filing is procedural, using Fidelity as broker and listing NASDAQ as the exchange. Recent nearby insider sales (363 and 376 shares) are disclosed and aggregated in the filing. Given the absolute size relative to total shares outstanding (59,915,670), this transaction appears immaterial to market capitalization. The filing lacks certain filer and issuer identifying details in the provided content.

Corporate Governance Expert

TL;DR Disclosure aligns with Rule 144 requirements; transparency is maintained though some identifying fields are absent in this excerpt.

The notice documents that the securities sold were the result of restricted stock vesting and were for compensation, which is a common source of Rule 144 filings. The broker is specified and recent sales by the same person are listed, supporting traceability of insider sales. Important administrative fields (certain filer CIK/relationship and the notice date) are not present in the provided text; those omissions limit assessment of filing timeliness and filer identity from this excerpt alone.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	67	4918.08	59915670	09/16/2025	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	09/15/2025	Restricted Stock Vesting	Issuer			67	09/15/2025	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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Douglas Munro 50 MINUTEMAN ROAD ANDOVER MA 01810	Common	08/18/2025	363	24145.42
Douglas Munro 50 MINUTEMAN ROAD ANDOVER MA 01810	Common	08/19/2025	376	24238.38

144: Remarks and Signature

Remarks

Date of Notice

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What shares does the MRCY Form 144 propose to sell?

The filing proposes the sale of 67 common shares with an aggregate market value of $4,918.08.

When and how were the 67 shares acquired for the MRCY filing?

The shares were acquired on 09/15/2025 via restricted stock vesting and the payment/nature is listed as compensation.

Which broker and exchange are named in the MRCY Form 144?

The broker is Fidelity Brokerage Services LLC (900 Salem Street, Smithfield RI) and the exchange is NASDAQ.

Has the seller made other recent sales disclosed in this filing?

Yes. The filing discloses sales by Douglas Munro of 363 shares on 08/18/2025 for $24,145.42 and 376 shares on 08/19/2025 for $24,238.38.

How large is the proposed sale relative to outstanding shares?

The proposed 67-share sale is listed against 59,915,670 shares outstanding, indicating the sale is immaterial in absolute terms based on counts provided.