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sellWeak cluster of 310b5-1 plan

Sadie Stern sold $130k of DXCM

EVP, Chief HR Officer at DEXCOM INC. 1,466 shares at an average of $88.99, traded Jul 28, 2025, filed Jul 29, 2025.

Warning score
21
Value
$130k
1,466 shares
Holdings after
106,689
-1% from before
From 52-week low
+50%
low $59.83, close $89.53
From 52-week high
-1%
high $90.75, as of Jul 28, 2025

Score components

  • Role
    Officer
    +15
  • Trade size
    $130k at market
    +11
  • Share of holdings sold
    Sold 1.4% of holdings
    0
  • Cluster
    3 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 Jul 29, 2025: -5.9%SPY +24.2% · excess -30.1%

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 0001093557-25-000234, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Jul 28, 2025SOpen-market sale
Common Stock10b5-1
-1,466$88.99$130k106,689Jul 29, 2025

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 310b5-1
DEXCOM INC
Jereme M Sylvain
EVP, Chief Financal Officer
$303k
3,638 shares
-2%
17Weak
DXCMsell 310b5-1
DEXCOM INC
Kyle Malady
director
$54k
667 shares
-3%
20Weak
DXCMsell 310b5-1
DEXCOM INC
Sadie Stern
EVP, Chief HR Officer
$117k
1,466 shares
-1%
32Weak
DXCMsell 310b5-1
DEXCOM INC
Jereme M Sylvain
EVP, Chief Financal Officer
$358k
4,824 shares
-4%
9Weak
DXCMsell 210b5-1
DEXCOM INC
Michael Jon Brown
EVP, Chief Legal Officer
$40k
500 shares
-1%
15Weak
DXCMsell 210b5-1
DEXCOM INC
Mark G Foletta
director
$223k
2,750 shares
-5%
16Weak
DXCMsell 310b5-1
DEXCOM INC
Michael Jon Brown
EVP, Chief Legal Officer
$43k
500 shares
-1%

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.

Sadie Stern sold $130k of DXCM | InsiderTell