MRCY Form 144: Insider Plans Sale of 10,395 Shares After Vesting

Rhea-AI Filing Summary

Form 144 filing for Mercury Systems, Inc. (MRCY) reports a proposed sale of 10,395 common shares on 08/18/2025 on NASDAQ with an aggregate market value of $691,436.94. The shares were acquired three days earlier on 08/15/2025 through restricted stock vesting from the issuer as compensation. The filer reports no other securities sold in the past three months and attests they are not aware of undisclosed material adverse information.

Positive

• The securities were acquired via restricted stock vesting which is a standard compensation mechanism.
• The filing includes full trade logistics: broker, number of shares, aggregate value, exchange, and approximate sale date.
• The filer reported no sales in the past three months, simplifying aggregation rules under Rule 144.

Negative

• The filer plans to sell the shares three days after vesting, indicating an immediate disposition rather than long-term hold.
• The filing does not list the filer’s CIK or contact details in the provided content tables, leaving some identifying fields blank.

Insights

Securities Analyst

TL;DR: Small insider sale of recently vested restricted shares; likely routine and not material to company valuation.

The filing documents a proposed sale of 10,395 common shares valued at $691,436.94 that were acquired by restricted stock vesting on 08/15/2025 and are planned to be sold on 08/18/2025 via Fidelity Brokerage Services on NASDAQ. There are no reported sales by the filer in the prior three months. From a market-impact perspective, the transaction size (approximately $0.69 million) is modest relative to large-cap market volume and the company’s outstanding shares reported here of 59,915,670, implying the sale represents a very small fraction of outstanding equity. The filing contains the standard attestation about material non-public information.

Corporate Governance Expert

TL;DR: Transaction appears procedural—vesting-triggered sale; disclosure complies with Rule 144 requirements.

The notice shows the securities were acquired by the issuer through restricted stock vesting and are being sold shortly thereafter. The filer certified absence of undisclosed material adverse information and reported no aggregated sales in the prior three months. This is a routine Rule 144 disclosure documenting intent to sell restricted shares; it meets required fields including broker, number of shares, approximate sale date, and sale venue. No governance red flags or missing mandatory disclosures are evident within the provided content.

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

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	10395	691436.94	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			10395	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

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 did Mercury Systems (MRCY) disclose in the Form 144?

The Form 144 discloses a proposed sale of 10,395 common shares worth $691,436.94 on 08/18/2025 on NASDAQ; shares were acquired by restricted stock vesting on 08/15/2025.

Who is the broker handling the sale in the MRCY Form 144?

The broker listed is Fidelity Brokerage Services LLC, 900 Salem Street, Smithfield RI 02917.

Were any other sales reported for the filer in the prior three months?

No. The filing states "Nothing to Report" for securities sold during the past three months.

What is the stated reason for the filer acquiring these MRCY shares?

The shares were acquired through Restricted Stock Vesting and the nature of payment is listed as Compensation.

Does the filer assert possession of any undisclosed material information?

By signing the notice, the filer represents they do not know any material adverse information about the issuer that has not been publicly disclosed.