MRCY Form 144: Notice to Sell 2,000 Shares

MRCY reported a Form 144 notice to sell 2,000 shares of Common Stock.

Rhea-AI Filing Summary

MRCY reported a Form 144 notice to sell 2,000 shares of Common Stock. The filing lists Fidelity Brokerage Services LLC as the broker and shows dates and amounts tied to restricted stock vesting: 894 shares vested 08/15/2025 and 1,106 shares vested 08/18/2025. The filing date shown is 05/11/2026.

Insights

Compliance Counsel

Form 144 records an intended sale by a holder using a broker.

The filing lists 2,000 shares of Common Stock with Fidelity Brokerage Services LLC as broker and includes vesting entries of 894 and 1,106 shares on 08/15/2025 and 08/18/2025. This is a routine resale notification under transaction rules.

Timing and final execution details are not shown in the excerpt; subsequent trade reports or broker confirmations would state whether the sales were completed.

Key Figures

Noticed shares to sell: 2,000 shares Restricted shares vested: 894 shares Restricted shares vested: 1,106 shares +1 more

4 metrics

Noticed shares to sell 2,000 shares Form 144 listing with broker reference

Restricted shares vested 894 shares Vested on 08/15/2025 (compensation)

Restricted shares vested 1,106 shares Vested on 08/18/2025 (compensation)

Form filing date 05/11/2026 Date shown on the excerpt

Key Terms

Form 144, Restricted Stock Vesting, Broker

3 terms

Form 144 regulatory

"Filer Information | | | 144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Restricted Stock Vesting financial

"Common | 08/15/2025 | Restricted Stock Vesting | Issuer"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

Broker market

"Common | Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917"

A broker is a licensed professional or firm that helps investors buy and sell financial assets by executing trades on their behalf, acting like a marketplace agent or matchmaker between buyers and sellers. Brokers matter to investors because they provide access to markets, handle order execution and paperwork, and can offer research or advice—services that affect trade speed, costs, and the quality of investment decisions.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the MRCY Form 144 filing report?

It reports an intended sale of 2,000 shares of common stock, listing Fidelity Brokerage Services LLC as broker. The notice also records restricted stock vesting of 894 and 1,106 shares on specified dates.

Who is the broker named in the MRCY Form 144?

The filing names Fidelity Brokerage Services LLC at 900 Salem Street, Smithfield, RI. That broker is referenced in connection with the 2,000-share sale notice dated 05/11/2026 in the excerpt.

What restricted stock vesting is shown in the filing for MRCY?

The excerpt shows restricted stock vesting entries: 894 shares vested on 08/15/2025 and 1,106 shares vested on 08/18/2025, labeled as compensation-related vesting events.

Does the Form 144 confirm the sales were completed?

No. The Form 144 excerpt notifies an intended sale of 2,000 shares but does not provide execution confirmations or sale prices. Final trade reports or broker statements would show completed transactions.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/11/2026 - 03:59 PM EDT Learn about SEC filing dates

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	0001995110
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	MERCURY SYSTEMS INC
SEC File Number	001-41194
Address of Issuer	50 MINUTEMAN ROAD ANDOVER MASSACHUSETTS 01810
Phone	9782561300
Name of Person for Whose Account the Securities are To Be Sold	Ratner Steven
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	Officer

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	2000	184920.00	60043283	05/11/2026	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			894	08/15/2025	Compensation
Common	08/18/2025	Restricted Stock Vesting	Issuer			1106	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

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	05/11/2026
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	/s/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Steven Ratner
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)