Transaction · 0001049521-26-000055

Ballhaus William L

Ballhaus William L, CHAIR, PRES, CEO, reported an open-market or private sale at MERCURY SYSTEMS INC involving 26802.000000 shares for an estimated $2688401.41. Reported holdings after the transaction were 250207.325000 shares. A 10b5-1 reference was not detected in the stored filing text.

Open-market sellSEC transaction code SCHAIR, PRES, CEO
MRCYMERCURY SYSTEMS INC
Trade date
Aug 19, 2026
Filing date
Aug 21, 2026
View on SEC Insider profile
Estimated value-$2.68MShares × reported price
Shares traded26.8k$100.31 per share
Holdings after250kDirect
% of reported position traded9.68%This security and ownership context
How reported position traded is calculated

Shares sold ÷ (holdings after + shares sold). Estimated position before: 277,009.325 shares.

Row-level estimate for this security and ownership context, not the insider’s complete portfolio. Joint ownership, other transactions in the filing, amendments and footnotes can affect interpretation.

MRCY price since this filing

Daily closing prices, with the filing date and available return windows
MRCY · Daily closing priceLoading daily prices…
Filing dateReturn windows appear as prices become available.
Pre-filing1mo ago +3.7%1w ago +22.2%1d ago +14.9%
Returns since7d -3.1%30d -6.7%90d180d1y

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Sell
Code S
Identifier
0001049521-26-000055
Common Stock
Transaction date
Aug 19, 2026
Filed Aug 21, 2026, 08:47 PM · 2d delay
Shares
26,802 sh
$100.31 per share
Estimated value
-$2.68M
Computed from shares × price
Holdings after
250,207.325 sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Cluster Selling Direct Ownership Large Sale Repeat Seller
Filing-only score

+10 points

Compact filing score computed from stored Form 4 facts. Version v1.

Positive filing signal

This filing has a modest positive filing-only score. Treat it as a useful flag for review, not as a buy signal.

How this score is calculated
  • direct_ownership+6 points

    direct_or_indirect_ownership = D

    Direct ownership reports the insider's personal stake.
  • timely_filing+4 points

    reporting_delay_days = 2

    Filing reported within two business days of the transaction.
Read the scoring methodology

Signed filing-only points, not a probability or expected return. Version v1.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

Chairman, President & CEO

Officer YesDirector Yes10% NoOther No
Footnotes & amended
  1. F1

    Represents shares sold as part of a sell-to-cover program to satisfy tax withholding obligations upon the vesting of stock awards.

  2. F2

    Represents the per share price attributed to sales of shares on behalf of all participants under the sell-to-cover program on the transaction date indicated.

Original filing · 0001049521-26-000055
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