Mercury Systems (MRCY) files Form 144 for 1,681-share sale post-vesting

Rhea-AI Filing Summary

Mercury Systems (MRCY) Form 144 notifies the proposed sale of 1,681 common shares (approximate aggregate market value $111,813.90) through Fidelity Brokerage Services on 08/18/2025 on NASDAQ. The shares were acquired on 08/15/2025 upon restricted stock vesting and payment was for compensation. The filer previously sold 1,839 shares on 06/16/2025 for gross proceeds of $98,344.57. The filing includes the standard representation that the seller is not aware of undisclosed material adverse information about the issuer.

Positive

• Compliance: The filing complies with Rule 144 disclosure requirements and documents restricted stock vesting and planned sale.
• Transparency: Includes prior sale history and broker details, improving investor visibility into insider transactions.
• Small scale: Transaction size (1,681 shares, ~$111.8k) appears modest and unlikely to materially affect market valuation.

Negative

• None.

Insights

Securities Analyst

TL;DR: Small, routine insider sale following restricted stock vesting; likely immaterial to company valuation.

This Form 144 documents a post-vesting sale of 1,681 shares valued at roughly $112k, executed through a broker on NASDAQ. The transaction appears to be an individual disposition tied to compensation rather than a sale to meet liquidity needs or signal operational concerns. Prior small sale (1,839 shares, ~$98k) suggests a pattern of modest dispositions. For investors, this is a transparency event but does not constitute a material capital move by the company.

Corporate Governance Expert

TL;DR: Filing demonstrates compliance with Rule 144 and disclosure practices; no governance red flags evident.

The notice shows the filer adhered to Rule 144 disclosure for restricted stock vesting and subsequent sales. The signature attestation about lack of undisclosed material adverse information is standard. The sizes of the transactions are small relative to typical market caps; there is no indication of unusual trading plans or clustered, large insider disposals that would raise governance concerns.

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	1681	111813.90	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			1681	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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Steven V. Ratner 50 Minuteman Road Andover MA 01810	Common	06/16/2025	1839	98344.57

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 does Mercury Systems (MRCY) Form 144 report?

The form reports a proposed sale of 1,681 common shares valued at $111,813.90, to be sold on 08/18/2025 through Fidelity on NASDAQ.

Why were the shares acquired that are being sold?

The shares were acquired on 08/15/2025 due to restricted stock vesting, with the nature of payment listed as compensation.

Has the filer sold other Mercury Systems shares recently?

Yes. The filer sold 1,839 shares on 06/16/2025 for gross proceeds of $98,344.57.

Which broker will execute the sale listed in the Form 144?

The sale is listed to be executed by Fidelity Brokerage Services LLC, 900 Salem Street, Smithfield RI on NASDAQ.

Does the filing indicate undisclosed adverse information about MRCY?

No. The filing includes the standard attestation that the seller does not know of any material adverse information that hasn't been publicly disclosed.