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sellWeak cluster of 510b5-1 plan

Stuart Kupinsky sold $95k of MRCY

EVP, CLO & Corp Sec at MERCURY SYSTEMS INC. 1,000 shares at an average of $95.23, traded Aug 21, 2026, filed Aug 25, 2026.

Warning score
20
Value
$95k
1,000 shares
Holdings after
56,352
-2% from before
From 52-week low
+39%
low $65.64, close $91.36
From 52-week high
-28%
high $126.21, as of Aug 21, 2026

Score components

  • Role
    Officer
    +15
  • Trade size
    $95k at market
    +10
  • Share of holdings sold
    Sold 1.7% of holdings
    0
  • Cluster
    5 insiders selling within 14 days
    +15
  • 10b5-1 plan
    Pre-scheduled under a 10b5-1 plan
    -20

What happened after comparable sells

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

MRCYOct 12, 2026 · close 77.67
Since filing Aug 25, 2026: -11.5%SPY +1.8% · excess -13.3%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0001049521-26-000061, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Aug 21, 2026SOpen-market sale
Common Stock10b5-1
-1,000$95.23$95k56,352Aug 25, 2026

Related signals

Other insiders at MERCURY SYSTEMS INC and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
4Weak
MRCYsell10b5-1
MERCURY SYSTEMS INC
Stuart Kupinsky
EVP, CLO & Corp Sec
$87k
1,000 shares
-2%
50Moderate
MRCYsell 3
MERCURY SYSTEMS INC
Steven Ratner
EVP, CHRO
$338k
4,000 shares
-17%
60Notable
MRCYsell 5
MERCURY SYSTEMS INC
William L Ballhaus
Chairman, President & CEO
$14M
160,166 shares
-35%
70Notable
MRCYsell 5
MERCURY SYSTEMS INC
William L Ballhaus
Chairman, President & CEO
$16M
173,209 shares
-54%
56Moderate
MRCYsell 5
MERCURY SYSTEMS INC
Steven Ratner
EVP, CHRO
$33k
356 shares
-100%
70Notable
MRCYsell 5
MERCURY SYSTEMS INC
William L Ballhaus
Chairman, President & CEO
$4.8M
48,812 shares
-18%
67Notable
MRCYsell 5
MERCURY SYSTEMS INC
David E. Farnsworth
EVP, CFO
$1.5M
14,767 shares
-11%
41Moderate
MRCYsell 5
MERCURY SYSTEMS INC
Stuart Kupinsky
EVP, CLO & Corp Sec
$131k
1,308 shares
-2%
49Moderate
MRCYsell 5
MERCURY SYSTEMS INC
Steven Ratner
EVP, CHRO
$320k
3,213 shares
-12%
38Weak
MRCYsell 5
MERCURY SYSTEMS INC
Douglas Munro
SVP, CAO
$66k
657 shares
-5%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.