Updated Jul 16, 2026 · Last SEC filing 2026-07-07
DEXCOM INC (DXCM) has filed 26 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-07. 2 Form 8-K material event filings were reported by DXCM in the last 90 days. 9 Form 144 notices of proposed sale were filed for DXCM stock. InsiderAlpha tracks every DXCM SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SEC CIK | 0001093557 |
|---|
| Form 4 filings (90d) | 26 |
|---|---|
| Form 8-K filings (90d) | 2 |
| Form 144 notices (90d) | 9 |
| Latest Form 4 filing | 2026-07-07 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| SAYER KEVIN R | Executive Chair | S — Open-market sale | 26.8K | $72.00 | $1.93M | SEC | |
| FOLETTA MARK G | Director | S — Open-market sale | 199 | $74.82 | $15K | SEC | |
| Brown Michael Jon | EVP Chief Legal Compliance Off | S — Open-market sale | 1.7K | $75.55 | $128K | SEC | |
| FOLETTA MARK G | Director | S — Open-market sale | 3.8K | $74.10 | $282K | SEC | |
| Coleman Jon | EVP, Chief Commercial Officer | S — Open-market sale | 4.9K | $74.13 | $364K | SEC | |
| Coleman Jon | EVP, Chief Commercial Officer | S — Open-market sale | 4.9K | $73.00 | $359K | SEC | |
| Driscoll Rimma | Director | A — Grant or award | 5.6K | $0.00 | — | SEC | |
| Heller Bridgette P | Director | A — Grant or award | 5.6K | $0.00 | — | SEC | |
| Collins Richard Alexander | Director | A — Grant or award | 5.6K | $0.00 | — | SEC | |
| Malady Kyle | Director | A — Grant or award | 5.6K | $0.00 | — | SEC | |
| ALTMAN STEVEN R | Director | A — Grant or award | 5.6K | $0.00 | — | SEC | |
| Osterloh Albert Frederick IV | Director | A — Grant or award | 1.6K | $0.00 | — | SEC | |
| AUGUSTINOS NICHOLAS | Director | A — Grant or award | 5.6K | $0.00 | — | SEC | |
| Ashley Euan A. | Director | A — Grant or award | 5.6K | $0.00 | — | SEC | |
| GALA RENEE D | Director | A — Grant or award | 5.6K | $0.00 | — | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for DEXCOM INC (DXCM). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| FOLETTA MARK G | 5 | $297K |
| ALTMAN STEVEN R | 3 | — |
| Brown Michael Jon | 3 | $335K |
| Collins Richard Alexander | 3 | — |
| AUGUSTINOS NICHOLAS | 3 | — |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in DXCM insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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