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sellModerate cluster of 410b5-1 plan

Kevin R Sayer sold $2.4M of DXCM

Executive Chair at DEXCOM INC. 26,756 shares at an average of $90.01, traded Aug 20, 2026, filed Aug 24, 2026.

Warning score
40
Value
$2.4M
26,756 shares
Holdings after
302,214
-8% from before
From 52-week low
+65%
low $54.84, close $90.22
From 52-week high
-1%
high $91.48, as of Aug 20, 2026

Score components

  • Role
    Chair
    +20
  • Trade size
    $2.4M at market
    +25
  • Share of holdings sold
    Sold 8.1% 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 Aug 24, 2026: -7.6%SPY +2.2% · excess -9.8%

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 0001093557-26-000151, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Aug 20, 2026SOpen-market sale
Common Stock10b5-1
-19,308$89.71$1.7M309,662Aug 24, 2026
Aug 20, 2026SOpen-market sale
Common Stock10b5-1
-7,351$90.78$667k302,311Aug 24, 2026
Aug 20, 2026SOpen-market sale
Common Stock10b5-1
-97$91.41$8,867302,214Aug 24, 2026

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%
21Weak
DXCMsell 410b5-1
DEXCOM INC
Michael Jon Brown
EVP Chief Legal Compliance Off
$143k
1,700 shares
-2%
31Weak
DXCMsell 410b5-1
DEXCOM INC
Jereme M Sylvain
EVP, Chief Financal Officer
$303k
3,638 shares
-2%
23Weak
DXCMsell 410b5-1
DEXCOM INC
Sadie Stern
EVP Chief People & Culture Off
$227k
2,565 shares
-2%
21Weak
DXCMsell 510b5-1
DEXCOM INC
Michael Jon Brown
EVP Chief Legal Compliance Off
$156k
1,700 shares
-2%
19Weak
DXCMsell 410b5-1
DEXCOM INC
Bridgette P Heller
director
$89k
1,012 shares
-3%
25Weak
DXCMsell 410b5-1
DEXCOM INC
Mark G Foletta
director
$331k
4,000 shares
-8%
40Moderate
DXCMsell 310b5-1
DEXCOM INC
Kevin R Sayer
Executive Chair
$2.0M
26,756 shares
-8%
14Weak
DXCMsell 210b5-1
DEXCOM INC
Michael Jon Brown
EVP Chief Legal Compliance Off
$127k
1,700 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.

Kevin R Sayer sold $2.4M of DXCM | InsiderTell