[144] Mercury Systems Inc. SEC Filing

Rhea-AI Filing Summary

Mercury Systems (MRCY) Form 144 notice reports a proposed sale of 13,050 common shares through Fidelity Brokerage Services with an aggregate market value of $841,252.59, and an approximate sale date of 08/19/2025 on NASDAQ. The securities were acquired on 08/18/2025 via restricted stock vesting from the issuer and are recorded as compensation. The filing also discloses that William L. Ballhaus sold 10,395 common shares on 08/18/2025 for gross proceeds of $691,436.94. The filer attests there is no undisclosed material information and signs the statutory declaration on the notice.

Insights

Securities Analyst

TL;DR: Insider restricted shares vested and are being registered for sale; recent near-term sale by an executive was executed for ~$691k.

The filing documents routine post-vesting transactions: 13,050 shares became available through restricted stock vesting on 08/18/2025 and are to be sold via Fidelity on 08/19/2025 with an indicated market value of $841,252.59. The record of William L. Ballhaus selling 10,395 shares the prior day for $691,436.94 confirms recent insider liquidity activity. This notice follows Rule 144 mechanics and includes the statutory attestation about material nonpublic information. For investors, this is a disclosure of insider selling activity rather than operational or financial performance information.

Corporate Governance Expert

TL;DR: Transaction appears procedural: vested restricted shares being sold under Rule 144 with standard insider attestation.

The document indicates compliance with Rule 144 requirements: the shares were acquired by restricted stock vesting (compensation) and the filer affirms no undisclosed material information. The timing—vesting on 08/18/2025 and planned sale on 08/19/2025—plus the contemporaneous sale by William L. Ballhaus suggests insiders are monetizing equity granted as compensation. The filing contains no indication of departures from disclosure or governance norms.

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	13050	841252.59	59915670	08/19/2025	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	08/18/2025	Restricted Stock Vesting	Issuer			13050	08/18/2025	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
William L. Ballhaus 50 Minuteman Road Andover MA 01810	Common	08/18/2025	10395	691436.94

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 144 reports a proposed sale of 13,050 common shares valued at $841,252.59, with an approximate sale date of 08/19/2025 on NASDAQ.

How were the 13,050 shares acquired?

The shares were acquired on 08/18/2025 via restricted stock vesting from the issuer and were recorded as compensation.

Did any insiders sell shares recently for Mercury Systems?

Yes. William L. Ballhaus sold 10,395 common shares on 08/18/2025 for gross proceeds of $691,436.94.

Which broker is handling the proposed sale?

The proposed sale is listed with Fidelity Brokerage Services LLC (900 Salem Street, Smithfield RI).

What does the filer state about material nonpublic information?

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