[144] Mercury Systems Inc. SEC Filing

Rhea-AI Filing Summary

Mercury Systems, Inc. (MRCY) Form 144 notice shows an insider sale program for common stock. The filing indicates 7,000 shares are proposed to be sold on 08/20/2025 through Fidelity Brokerage Services on NASDAQ, with an aggregate market value of $446,312.19 and the company having 59,915,670 shares outstanding. The securities offered originate from recent restricted stock vesting events: 2,447 shares vested 08/15/2025, 4,552 shares vested 05/16/2025, and 1 share vested 08/17/2024, each listed as compensation. The filing also discloses three open-market sales by Steven Ratner totaling 5,255 shares during 06/16/2025–08/19/2025 for total gross proceeds shown per sale. The signer certifies no undisclosed material adverse information.

Insights

Securities Analyst

TL;DR: Routine Rule 144 filing for insider stock sales totaling 7,000 shares; prior small sales disclosed, no new financial metrics.

The filing documents a proposed sale of 7,000 common shares on 08/20/2025 via Fidelity with an aggregate market value of $446,312.19, sourced from recent restricted stock vesting events recorded as compensation. Recent sales by the named individual (Steven Ratner) totaled 5,255 shares across three transactions in June–August 2025 with listed gross proceeds per trade. This form is a disclosure of intended/actual sales under Rule 144 and does not include earnings, guidance, or operational changes. Impact on market liquidity or ownership is likely minimal given the company's ~59.9 million shares outstanding, and no undisclosed material adverse information is represented by the signer.

Corporate Governance Expert

TL;DR: Compliance-focused filing showing insider exercising/vesting and subsequent sales; appears procedural and routine.

The document records restricted stock vesting events and related sales that comply with Rule 144 disclosure requirements. The trustee/broker is identified as Fidelity Brokerage Services and trades were executed on NASDAQ. The signer affirms absence of undisclosed material adverse information, consistent with Form 144 attestations. There are no indications of unusual timing, related-party transfers, or compensatory anomalies in the provided data. From a governance perspective, the filing represents standard transparency about insider liquidity.

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	7000	446312.19	59915670	08/20/2025	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			2447	08/15/2025	Compensation
Common	05/16/2025	Restricted Stock Vesting	Issuer			4552	05/16/2025	Compensation
Common	08/17/2024	Restricted Stock Vesting	Issuer			1	08/17/2024	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 Ratner 50 Minuteman Road Andover MA 01810	Common	08/19/2025	1735	111844.69
Steven Ratner 50 Minuteman Road Andover MA 01810	Common	08/18/2025	1681	111813.90
Steven 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 the MRCY Form 144 disclose?

The filing discloses a proposed sale of 7,000 common shares on 08/20/2025 via Fidelity for an aggregate market value of $446,312.19 and recent vesting events.

Who is the selling party named in the Form 144?

The disclosed seller in recent sales is Steven Ratner, with address information shown and three sales totaling 5,255 shares in Jun–Aug 2025.

How were the shares acquired that are being sold under Rule 144?

The shares originated from restricted stock vesting events dated 08/15/2025 (2,447 shares), 05/16/2025 (4,552 shares), and 08/17/2024 (1 share), recorded as compensation.

On which exchange and through which broker will the sale occur?

The proposed sale is scheduled to occur on NASDAQ through Fidelity Brokerage Services LLC.

What were the gross proceeds for the recent sales disclosed?

Three sales reported gross proceeds of $98,344.57 (06/16/2025 for 1,839 shares), $111,813.90 (08/18/2025 for 1,681 shares), and $111,844.69 (08/19/2025 for 1,735 shares).