DEXCOM INC (DXCM) insider trading
No open-market insider purchases of DEXCOM INC are on record; 5 open-market sales are.
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Insider purchases
No open-market purchases on record.
Insider sales
5 open-market sales on record
| Filed | Insider | Sold |
|---|---|---|
| Oct 28 Form 4 (opens sec.gov) |
Sadie SternChief People · planned (10b5-1) | $202k 2,565 at $78.62 · 2% of holdings |
| Oct 19 Form 4 (opens sec.gov) |
Michael Jon BrownChief Legal Compliance Off · planned (10b5-1) | $145k 1,700 at $85.48 · 2% of holdings |
| Sep 30 Form 4 (opens sec.gov) |
Sadie SternChief People · planned (10b5-1) | $221k 2,565 at $86.15 · 2% of holdings |
| Sep 16 Form 4 (opens sec.gov) |
Nicholas AugustinosDirector · planned (10b5-1) | $680k 8,089 at $84.04 · 19% of holdings |
| Sep 16 Form 4 (opens sec.gov) |
Michael Jon BrownChief Legal Compliance Off · planned (10b5-1) | $143k 1,700 at $84.04 · 2% of holdings |
Most insider sales are planned in advance or made for personal reasons, so a sale says less than a buy.
DXCM trades reported by members of Congress
| Reported | Member | Trade | Amount |
|---|---|---|---|
| May 10 |  Tina SmithD-MN · Senate3 days after the trade | Sale | $100K–$250K |
| May 10 | Tina SmithD-MN · Senate11 days after the trade | Sale | $100K–$250K |
Members of Congress report trades up to 45 days later, in dollar ranges. Every member's trades.
Planned insider sales of DXCM (Form 144)
| Filed | Insider | To sell |
|---|---|---|
| Oct 27 Form 144 | SADIE STERNOfficer · 10b5-1 plan | $202k 2,565 shares from Oct 27 |
| Oct 15 Form 144 | MICHAEL BROWNOfficer · 10b5-1 plan | $145k 1,700 shares from Oct 15 |
A Form 144 is filed before an insider sells restricted or control shares; the Form 4 reports the sale once made.
Questions
Are insiders buying DXCM stock?
Not recently: no open-market purchases were filed in the last 90 days.
Who bought DXCM stock most recently?
No insider has bought DXCM on the open market in the filings on record.
How does InsiderBeacon score an insider buy?
Out of 100, from who bought, how much their stake grew, the size of the trade, whether other insiders bought within ten days, where the price sat in its 52-week range, and whether it was a first or a routine buy. The score is fixed when the filing arrives. The formula and the research behind it.
Data as of Oct 28, 2026, from SEC EDGAR Form 4 filings: open-market purchases (code P) of $25,000 or more, and open-market sales. Every row links to its filing. Scores summarise what a filing says (how the score works); outcomes are hypothetical, from the first close after the filing, and past results don't predict future ones. Disclaimer