As of the latest Form 4 filed Jul 7, 2026.
What DexCom Inc insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 46 most recent filings for DXCM.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-07-07 | 2026-07-06 | SAYER KEVIN R Executive Chair | SSale | −26.8K | $72.00 | $1.93M | Yes (planned) | Form 4 ↗ |
| 2026-06-17 | 2026-06-15 | Brown Michael Jon EVP Chief Legal Compliance Off | SSale | −1.70K | $75.55 | $128K | Yes (planned) | Form 4 ↗ |
| 2026-06-17 | 2026-06-15 | FOLETTA MARK G Director | SSale | −199.00 | $74.82 | $14.9K | Yes (planned) | Form 4 ↗ |
| 2026-06-17 | 2026-06-15 | FOLETTA MARK G, Director | SSale | −3.80K | $74.10 | $282K | Yes (planned) | Form 4 ↗ |
| 2026-06-05 | 2026-06-04 | Coleman Jon EVP, Chief Commercial Officer | SSale | −4.91K | $74.13 | $364K | Yes (planned) | Form 4 ↗ |
| 2026-06-05 | 2026-06-03 | Coleman Jon, EVP, Chief Commercial Officer | SSale | −4.91K | $73.00 | $359K | Yes (planned) | Form 4 ↗ |
| 2026-06-01 | 2026-05-28 | ALTMAN STEVEN R Director | AAward | +5.57K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-01 | 2026-05-28 | Malady Kyle Director | AAward | +5.58K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-01 | 2026-05-28 | AUGUSTINOS NICHOLAS Director | AAward | +5.58K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-01 | 2026-05-28 | FOLETTA MARK G Director | AAward | +6.33K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-01 | 2026-05-28 | Heller Bridgette P Director | AAward | +5.58K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-01 | 2026-05-28 | Osterloh Albert Frederick IV Director | AAward | +1.63K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-01 | 2026-05-28 | Driscoll Rimma Director | AAward | +5.61K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-01 | 2026-05-28 | Ashley Euan A. Director | AAward | +5.57K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-01 | 2026-05-28 | Collins Richard Alexander Director | AAward | +5.61K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-01 | 2026-05-28 | GALA RENEE D Director | AAward | +5.61K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-27 | 2026-05-22 | Leach Jacob Steven President, CEO, and Director | FTax | −1.45K | $71.90 | $104K | No | Form 4 ↗ |
| 2026-05-27 | 2026-05-22 | Brown Michael Jon EVP Chief Legal Compliance Off | FTax | −1.45K | $71.90 | $104K | No | Form 4 ↗ |
| 2026-05-27 | 2026-05-22 | Sylvain Jereme M EVP, Chief Financal Officer | FTax | −1.45K | $71.90 | $104K | No | Form 4 ↗ |
| 2026-05-27 | 2026-05-22 | Stern Sadie EVP Chief People & Culture Off | FTax | −1.45K | $71.90 | $104K | No | Form 4 ↗ |
| 2026-05-27 | 2026-05-22 | Coleman Jon EVP, Chief Commercial Officer | FTax | −7.36K | $71.90 | $529K | No | Form 4 ↗ |
| 2026-05-26 | 2026-05-21 | SAYER KEVIN R Executive Chair | SSale | −26.8K | $72.00 | $1.93M | Yes (planned) | Form 4 ↗ |
| 2026-05-19 | 2026-05-15 | Brown Michael Jon EVP, Chief Legal Officer | SSale | −1.70K | $59.91 | $102K | Yes (planned) | Form 4 ↗ |
| 2026-05-14 | 2026-05-12 | Heller Bridgette P Director | SSale | −1.01K | $60.01 | $60.7K | Yes (planned) | Form 4 ↗ |
| 2026-05-11 | 2026-05-08 | AUGUSTINOS NICHOLAS Director | GGift | +5.05K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-11 | 2026-05-08 | AUGUSTINOS NICHOLAS, Director | GGift | −5.05K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-11 | 2026-05-08 | Collins Richard Alexander Director | GGift | +5.07K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-11 | 2026-05-08 | Collins Richard Alexander, Director | GGift | −5.07K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-11 | 2026-05-08 | FOLETTA MARK G Director | GGift | +5.73K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-11 | 2026-05-08 | FOLETTA MARK G, Director | GGift | −5.73K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-11 | 2026-05-08 | ALTMAN STEVEN R Director | GGift | +5.04K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-11 | 2026-05-08 | ALTMAN STEVEN R, Director | GGift | −5.04K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-15 | Brown Michael Jon EVP, Chief Legal Officer | SSale | −1.70K | $63.04 | $107K | Yes (planned) | Form 4 ↗ |
| 2026-03-18 | 2026-03-16 | Brown Michael Jon EVP, Chief Legal Officer | SSale | −1.70K | $64.85 | $110K | Yes (planned) | Form 4 ↗ |
| 2026-03-10 | 2026-03-08 | SAYER KEVIN R Executive Chair | FTax | −32.5K | $68.10 | $2.21M | No | Form 4 ↗ |
| 2026-03-10 | 2026-03-08 | SAYER KEVIN R, Executive Chair | AAward | +32.7K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-10 | 2026-03-08 | Sylvain Jereme M EVP, Chief Financal Officer | FTax | −18.9K | $68.10 | $1.29M | No | Form 4 ↗ |
| 2026-03-10 | 2026-03-08 | Sylvain Jereme M, EVP, Chief Financal Officer | AAward | +48.8K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-10 | 2026-03-08 | Brown Michael Jon EVP, Chief Legal Officer | FTax | −23.3K | $68.10 | $1.59M | No | Form 4 ↗ |
| 2026-03-10 | 2026-03-08 | Brown Michael Jon, EVP, Chief Legal Officer | AAward | +39.0K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-10 | 2026-03-08 | Stern Sadie EVP, Chief HR Officer | FTax | −17.2K | $68.10 | $1.17M | No | Form 4 ↗ |
| 2026-03-10 | 2026-03-08 | Stern Sadie, EVP, Chief HR Officer | AAward | +39.0K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-10 | 2026-03-08 | Leach Jacob Steven President, CEO, and Director | FTax | −19.8K | $68.10 | $1.35M | No | Form 4 ↗ |
| 2026-03-10 | 2026-03-08 | Leach Jacob Steven, President, CEO, and Director | AAward | +105K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-10 | 2026-03-08 | Coleman Jon EVP, Chief Commercial Officer | AAward | +43.9K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2024-05-02 | 2024-04-30 | Brown Michael Jon EVP Chief Legal Officer | SSale | −629.00 | $126.25 | $79.4K | Yes (planned) | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also DXCM’s full analysis or the market-wide insider trading feed. The tabs above jump to DXCM’s other SEC data.
Source: SEC Form 4 filings for DXCM, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.