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sellWeak cluster of 410b5-1 plan

Michael Jon Brown sold $143k of DXCM

EVP Chief Legal Compliance Off at DEXCOM INC. 1,700 shares at an average of $84.04, traded Sep 15, 2026, filed Sep 16, 2026.

Warning score
21
Value
$143k
1,700 shares
Holdings after
99,885
-2% from before
From 52-week low
-
no price yet
From 52-week high
-
no price yet

Score components

  • Role
    Officer
    +15
  • Trade size
    $143k at market
    +11
  • Share of holdings sold
    Sold 1.7% of holdings
    0
  • Cluster
    4 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.

DXCMOct 9, 2026 · close 84.11
Since filing Sep 16, 2026: -3.7%SPY +3.5% · excess -7.2%

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 0001093557-26-000178, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Sep 15, 2026SOpen-market sale
Common Stock10b5-1
-1,700$84.04$143k99,88526 d ago

Related signals

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

ScoreCompanyInsiderValueHoldingsFiled
22Weak
DXCMsell 310b5-1
DEXCOM INC
Sadie Stern
EVP Chief People & Culture Off
$221k
2,565 shares
-2%
36Weak
DXCMsell 410b5-1
DEXCOM INC
Nicholas Augustinos
director
$680k
8,089 shares
-22%
31Weak
DXCMsell 310b5-1
DEXCOM INC
Jereme M Sylvain
EVP, Chief Financal Officer
$303k
3,638 shares
-2%
20Weak
DXCMsell 410b5-1
DEXCOM INC
Sadie Stern
EVP, Chief HR Officer
$125k
1,466 shares
-1%
16Weak
DXCMsell 410b5-1
DEXCOM INC
Michael Jon Brown
EVP, Chief Legal Officer
$41k
500 shares
-1%
23Weak
DXCMsell 410b5-1
DEXCOM INC
Mark G Foletta
director
$229k
2,750 shares
-5%
33Weak
DXCMsell 410b5-1
DEXCOM INC
Nicholas Augustinos
director
$518k
6,290 shares
-16%
26Weak
DXCMsell 210b5-1
DEXCOM INC
Michael Jon Brown
EVP, Chief Legal Officer
$843k
10,000 shares
-9%
21Weak
DXCMsell 210b5-1
DEXCOM INC
Sadie Stern
EVP, Chief HR Officer
$526k
6,184 shares
-5%
10Weak
DXCMsell 610b5-1
DEXCOM INC
Bridgette P Heller
director
$25k
352 shares
-2%

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.

Michael Jon Brown sold $143k of DXCM | InsiderTell