StockCIK 1093557

DEXCOM INC (DXCM): Insider Trades and Fund Holdings

In the past 12 months, DEXCOM INC insiders reported 0 open-market purchases worth $0 and 10 sales worth $4.37M; 10 of the sales were reported as made under a 10b5-1 trading plan.

0Insider buys, 12 months

$0Bought by insiders, 12 months

$4.37MSold by insiders, 12 months

2Tracked funds holding

Recent insider trades

Open-market purchases (code P) and sales (code S) from Form 4. Grants, option exercises and gifts are not shown. Latest filing: Oct 19, 2026.

Recent DXCM insider trades
Filed	Traded	Insider	Role	Type	Shares	Price ($)	Value	Holding	Filing
Oct 19	Oct 15	Michael Jon BrownGeneral Counsel	General Counsel	▼ SELL10b5-1	1,700	85.48	$145K	−1.7%	Form 4 ↗
Sep 30	Sep 28	Sadie SternEVP	EVP	▼ SELL10b5-1	2,565	86.15	$221K	−2.0%	Form 4 ↗
Sep 16	Sep 15	Nicholas AugustinosDirector	Director (ind.)	▼ SELL10b5-1	6,539	84.04	$550K	−18%	Form 4 ↗
Sep 16	Sep 15	Michael Jon BrownGeneral Counsel	General Counsel	▼ SELL10b5-1	1,700	84.04	$143K	−1.7%	Form 4 ↗
Sep 16	Sep 14	Nicholas AugustinosDirector	Director (ind.)	▼ SELL10b5-1	1,550	84.02	$130K	−4.1%	Form 4 ↗
Sep 14	Sep 10	Jereme M. SylvainEVP	EVP	▼ SELL10b5-1	3,638	83.27	$303K	−2.4%	Form 4 ↗
Aug 28	Aug 27	Sadie SternEVP	EVP	▼ SELL10b5-1	2,565	88.37	$227K	−2.0%	Form 4 ↗
Aug 24	Aug 20	Kevin R. SayerExecutive Chair	Executive Chair	▼ SELL10b5-1	26,756	90.01	$2.41M	−8.1%	Form 4 ↗
Aug 17	Aug 14	Michael Jon BrownGeneral Counsel	General Counsel	▼ SELL10b5-1	1,700	91.93	$156K	−1.6%	Form 4 ↗
Aug 13	Aug 12	Bridgette P. HellerDirector	Director	▼ SELL10b5-1	1,012	88.29	$89K	−3.3%	Form 4 ↗

Source: SEC Form 4 filings, retrieved Oct 28, 2026. How we read filings

Insiders who traded in the past year

Insider	Role	Bought	Sells	Sold	Latest
Michael Jon Brown	General Counsel	$0	3	$444K	Oct 19, 2026
Sadie Stern	EVP	$0	2	$448K	Sep 30, 2026
Nicholas Augustinos	Director	$0	2	$680K	Sep 16, 2026
Jereme M. Sylvain	EVP	$0	1	$303K	Sep 14, 2026
Kevin R. Sayer	Executive Chair	$0	1	$2.41M	Aug 24, 2026
Bridgette P. Heller	Director	$0	1	$89K	Aug 13, 2026

Tracked funds that report DXCM

From each fund's latest 13F. Holdings are as of quarter end and are filed up to 45 days later.

Fund	Quarter	Shares	Value	% of portfolio	Change
Renaissance Technologies	Q2 2026	1,630,796	$109.8M	0.15%	▲ +3.0%
Bridgewater Associates	Q2 2026	400,929	$27.0M	0.11%	▲ +187.0%

Source: SEC Form 13F-HR filings, retrieved Oct 28, 2026. How we read filings

Reading these numbers

Insiders sell for many reasons: taxes, diversification, a house. Purchases with their own money are rarer and are usually read as more informative. A Form 4 is due within two business days of the trade. How to read a Form 4 →