DexCom Inc. (DXCM) — Insider Trading

Name: Insider Trading DexCom Inc. (DXCM) — October 2026
Creator: WhaleSentiment

Sector: Healthcare • All Insider Transactions

🔄 Last update: 10/11/2026 at 22:39 UTC

Sales (90d)

$4.6M

13 transactions

Buys (90d)

0 transactions

WhaleSentiment Score ℹ️

⚪ +0

Neutro

Form 144 Filings

Upcoming sale notices

Stock Price DXCM 📉

DXCM stock price — last 6 months

Last Price

$84.11

09/10/2026 (market close)

Daily Change

-0.30 (-0.36%)

6-Month Performance

+31.4%

$64.02 → $84.11

6M High / 6M Low

$92.34

Min: $57.56

▲ = insider buy (0), ▼ = insider sell (13)

Data from Yahoo Finance, 15-min delay. Last update: 09/10/2026 (market close).

All Insider Transactions DXCM — 2026

Insider Transactions

Date	Insider	Role	Type	Shares	Price	Value
09/28/2026	Stern Sadie	EVP Chief People & Culture Off	Sale	2,565	$86.15	$0.2M
09/15/2026	AUGUSTINOS NICHOLAS	Director	Sale	6,539	$84.04	$0.5M
09/15/2026	Brown Michael Jon	EVP Chief Legal Compliance Off	Sale	1,700	$84.04	$0.1M
09/14/2026	AUGUSTINOS NICHOLAS	Director	Sale	1,550	$84.02	$0.1M
09/10/2026	Sylvain Jereme M	EVP, Chief Financal Officer	Sale	3,638	$83.27	$0.3M
09/10/2026	Boehnlein Glenn S	Director	Award	5,841	—	—
08/27/2026	Stern Sadie	EVP Chief People & Culture Off	Sale	2,565	$88.37	$0.2M
08/22/2026	Leach Jacob Steven	President, CEO, and Director	Tax	1,451	$92.34	$0.1M
08/22/2026	Sylvain Jereme M	EVP, Chief Financal Officer	Tax	1,451	$92.34	$0.1M
08/22/2026	Brown Michael Jon	EVP Chief Legal Compliance Off	Tax	1,451	$92.34	$0.1M
08/22/2026	Stern Sadie	EVP Chief People & Culture Off	Tax	1,451	$92.34	$0.1M
08/20/2026	SAYER KEVIN R	Executive Chair	Sale	19,308	$89.71	$1.7M
08/20/2026	SAYER KEVIN R	Executive Chair	Sale	7,351	$90.78	$0.7M
08/20/2026	SAYER KEVIN R	Executive Chair	Sale	97	$91.41	$0.009M
08/14/2026	Brown Michael Jon	EVP Chief Legal Compliance Off	Sale	1,700	$91.93	$0.2M
08/12/2026	AUGUSTINOS NICHOLAS	Director	Gift	1,075	—	—
08/12/2026	Heller Bridgette P	Director	Sale	1,012	$88.29	$0.09M
08/03/2026	FOLETTA MARK G	Director	Sale	2,000	$85.32	$0.2M
07/31/2026	FOLETTA MARK G	Director	Sale	2,000	$80.00	$0.2M

Holdings Summary

Insider	Role	Shares Held	Last Transaction
Leach Jacob Steven	President, CEO, and Director	418,908	08/22/2026
SAYER KEVIN R	Executive Chair	309,662	08/20/2026
Sylvain Jereme M	EVP, Chief Financal Officer	146,828	09/10/2026
Stern Sadie	EVP Chief People & Culture Off	123,478	09/28/2026
Brown Michael Jon	EVP Chief Legal Compliance Off	99,885	09/15/2026
FOLETTA MARK G	Director	48,852	08/03/2026
Heller Bridgette P	Director	29,570	08/12/2026
AUGUSTINOS NICHOLAS	Director	29,293	09/15/2026
Boehnlein Glenn S	Director	5,841	09/10/2026

⚠️ Form 144 — Upcoming Sale Notices

Form 144 is filed BEFORE the actual sale. It is an important leading indicator.

Filing Date	Type	SEC Link
09/28/2026	144	View Filing →
09/15/2026	144	View Filing →
09/15/2026	144	View Filing →
09/14/2026	144	View Filing →
09/10/2026	144	View Filing →
08/27/2026	144	View Filing →
08/20/2026	144	View Filing →
08/14/2026	144	View Filing →
08/12/2026	144	View Filing →

Financial Context

Recent financial data from SEC filings (XBRL) to contextualize insider activity.

Revenue (latest quarter)

$266.7M

Period: 2018-09-30

Net Income

$249.1M

Profit

Diluted EPS

$0.64

Per share

What is Insider Trading on DexCom Inc.?

Legal insider trading occurs when executives, directors, and major shareholders (>10%) of a public company buy or sell shares of their own company and report it to the SEC via Form 4.

How to Read the Data

Open market purchases (P) — the strongest signal. The insider uses their own money to buy shares.

Signals to Watch for DXCM

Cluster buying: multiple DexCom Inc. insiders buying in the same week → very bullish signal
Excessive selling: selling volume above historical average → possible concern signal
Form 144: filing of a sale notice → imminent sale in the coming days/weeks
10b5-1 Plan: pre-programmed sales are less significant than discretionary sales

Sources & References

All data on this page comes directly from public SEC filings.

📋 View all Form 4 filings on SEC EDGAR DXCM →

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⚠️ Disclaimer: WhaleSentiment provides public SEC data for informational and educational purposes only. It does not provide financial advice, investment recommendations, or solicitation to buy/sell financial instruments. Always consult a qualified financial advisor before making investment decisions.