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  4. [144] MERCURY SYSTEMS INC SEC Filing

Mercury Systems (NASDAQ: MRCY) insider logs three August sales, plans another for taxes

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
144

Rhea-AI Filing Summary

MERCURY SYSTEMS INC (MRCY) disclosed that officer David E. Farnsworth plans to sell up to 6,612 shares of common stock under Rule 144 following restricted stock vesting, using Fidelity Brokerage Services LLC as broker. In the three days prior, he reported sales of 1,345, 7,347, and 8,155 common shares, with disclosed transaction amounts, and noted that part of the sale proceeds will cover tax obligations from a vested equity award.

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Planned shares to be sold 6,612 shares Common stock listed under Securities To Be Sold
Reported sale 08/17/2026 1,345 shares Common stock sold during the past 3 months
Reported sale amount 08/17/2026 147,883.96 Dollar amount associated with 1,345-share sale
Reported sale 08/18/2026 7,347 shares Common stock sold during the past 3 months
Reported sale amount 08/18/2026 818,145.03 Dollar amount associated with 7,347-share sale
Reported sale 08/19/2026 8,155 shares Common stock sold during the past 3 months
Reported sale amount 08/19/2026 817,995.43 Dollar amount associated with 8,155-share sale
Planned sale valuation row figure 645,816.52 Figure associated with 6,612 planned shares in Securities Information table
Rule 144 regulatory
"See the definition of "person" in paragraph (a) of Rule 144."
Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.
restricted stock financial
"Common | 08/19/2026 | Restricted Stock Vesting | Issuer"
Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.
vested equity award financial
"resulting from the settlement of a vested equity award distribution."
attorney-in-fact regulatory
"as attorney-in-fact for David Farnsworth"
An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

FAQ

What insider transaction did MRCY report for David E. Farnsworth?
MRCY reported that officer David E. Farnsworth intends to sell up to 6,612 shares of common stock under Rule 144. The proposed sale is linked to the vesting of restricted stock and will be executed through Fidelity Brokerage Services LLC.

How many MRCY shares has David E. Farnsworth sold recently?
Farnsworth reported selling 1,345 shares on August 17, 7,347 shares on August 18, and 8,155 shares on August 19, 2026. Each transaction involved MRCY common stock and is listed in the Rule 144 notice with corresponding dollar amounts.

What is the purpose of David E. Farnsworth’s planned MRCY share sale?
The filing states that the sale includes an amount necessary to cover a tax obligation arising from settlement of a vested equity award. This links the planned Rule 144 sale to compensation-related restricted stock vesting.

Which broker is handling the planned MRCY Rule 144 sale?
The planned sale of MRCY shares will be handled by Fidelity Brokerage Services LLC. The broker is listed alongside the common stock being sold under Rule 144 in the notice filed for David E. Farnsworth.

On which market are the MRCY shares in this Rule 144 notice traded?
The notice identifies the market for the MRCY common stock as NASDAQ. This indicates that the reported and proposed transactions in Mercury Systems Inc. common shares occur on that trading venue.

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

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144: Filer Information

144: Issuer Information

144: Securities Information



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


* 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

144: Remarks and Signature

Source: View Original Filing on SEC EDGAR