DXCM

insider transactions

DEXCOM INC — buys & sells by directors, officers and 10% owners (SEC Form 4).

30D 90D 1Y

Net shares · 365d

-8.8K

18.2K buy · 27.0K sell

Net value · 365d

-$949.9K

$1.0M in · $2.0M out

Sentiment · 365d

Net selling

34% buying · 66% selling

Open-market trades · 365d

18.2K buy · 27.0K sell

Net buy / sell volume

Tap or hover the chart for daily net volume. Green = net buying, red = net selling.

All transactions

Sell·S
Mar 16, 26

Brown Michael Jon

EVP, Chief Legal Officer · 10b5-1

$110.2K

1.7K sh · $64.85

Own -1%
Grant·A
Mar 8, 26

Stern Sadie

EVP, Chief HR Officer

$0

39.0K sh

Own +36%
Other·F
Mar 8, 26

Stern Sadie

EVP, Chief HR Officer

$1.2M

17.2K sh · $68.10

Own -12%
Other·F
Mar 8, 26

Sylvain Jereme M KEY

EVP, Chief Financal Officer

$1.3M

18.9K sh · $68.10

Own -11%
Grant·A
Mar 8, 26

Sylvain Jereme M KEY

EVP, Chief Financal Officer

$0

48.8K sh

Own +40%
Other·F
Mar 8, 26

Brown Michael Jon

EVP, Chief Legal Officer

$1.6M

23.3K sh · $68.10

Own -17%
Grant·A
Mar 8, 26

Brown Michael Jon

EVP, Chief Legal Officer

$0

39.0K sh

Own +39%
Grant·A
Mar 8, 26

Coleman Jon

EVP, Chief Commercial Officer

$0

43.9K sh

Own +64%
Grant·A
Mar 8, 26

Leach Jacob Steven KEY

President, CEO, and Director

$0

104.5K sh

Own +31%
Other·F
Mar 8, 26

Leach Jacob Steven KEY

President, CEO, and Director

$1.3M

19.8K sh · $68.10

Own -4%
Grant·A
Mar 8, 26

SAYER KEVIN R KEY

Executive Chair

$0

32.7K sh

Own +8%
Other·F
Mar 8, 26

SAYER KEVIN R KEY

Executive Chair

$2.2M

32.5K sh · $68.10

Own -7%
Grant·A
Feb 26, 26

Osterloh Albert Frederick IV

Director

$0

7.1K sh

Own New
Sell·S
Feb 12, 26

Heller Bridgette P

Director · 10b5-1

$68.8K

1.0K sh · $68.01

Own -4%
Other·F
Jan 29, 26

Sylvain Jereme M KEY

EVP, Chief Financal Officer

$194.6K

2.7K sh · $73.36

Own -2%
Grant·A
Jan 29, 26

Sylvain Jereme M KEY

EVP, Chief Financal Officer

$0

7.1K sh

Own +6%
Other·F
Jan 29, 26

SAYER KEVIN R KEY

Executive Chair

$2.5M

34.3K sh · $73.36

Own -8%
Grant·A
Jan 29, 26

SAYER KEVIN R KEY

Executive Chair

$0

71.2K sh

Own +19%
Other·F
Jan 29, 26

Brown Michael Jon

EVP, Chief Legal Officer

$194.6K

2.7K sh · $73.36

Own -3%
Grant·A
Jan 29, 26

Brown Michael Jon

EVP, Chief Legal Officer

$0

7.1K sh

Own +8%
Grant·A
Jan 29, 26

Stern Sadie

EVP, Chief HR Officer

$0

7.1K sh

Own +7%
Other·F
Jan 29, 26

Stern Sadie

EVP, Chief HR Officer

$194.8K

2.7K sh · $73.36

Own -2%
Grant·A
Jan 29, 26

Leach Jacob Steven KEY

President, CEO, and Director

$0

8.3K sh

Own +3%
Other·F
Jan 29, 26

Leach Jacob Steven KEY

President, CEO, and Director

$224.3K

3.1K sh · $73.36

Own -1%
Sell·S
Nov 14, 25

Collins Richard Alexander

Director · 10b5-1

$171.6K

2.9K sh · $59.05

Own -8%
Sell·S
Nov 12, 25

Heller Bridgette P

Director · 10b5-1

$58.8K

1.0K sh · $58.07

Own -4%
Buy·P
Nov 10, 25

Leach Jacob Steven KEY

President & COO

$863.2K

15.7K sh · $54.98

Own +5%
Buy·P
Nov 10, 25

Leach Jacob Steven KEY

President & COO

$138.6K

2.5K sh · $55.43

Own +1%
Sell·S
Nov 10, 25

Collins Richard Alexander

Director · 10b5-1

$217.8K

3.9K sh · $55.17

Own -9%
Grant·A
Oct 24, 25

Ashley Euan A.

Director

$0

7.2K sh

Own New
Sell·S
Sep 5, 25

Malady Kyle

Director · 10b5-1

$53.9K

667 sh · $80.86

Own -3%
Sell·S
Sep 4, 25

Stern Sadie

EVP, Chief HR Officer · 10b5-1

$117.3K

1.5K sh · $80.00

Own -1%
Sell·S
Sep 2, 25

Sylvain Jereme M KEY

EVP, Chief Financal Officer · 10b5-1

$357.8K

4.8K sh · $74.17

Own -4%
Sell·S
Aug 15, 25

Brown Michael Jon

EVP, Chief Legal Officer · 10b5-1

$40.1K

500 sh · $80.29

Own -1%
Sell·S
Aug 15, 25

FOLETTA MARK G

Director · 10b5-1

$207.0K

2.6K sh · $81.02

Own -5%
Sell·S
Aug 15, 25

FOLETTA MARK G

Director · 10b5-1

$15.9K

195 sh · $81.54

Own -0%
Sell·S
Jul 28, 25

Stern Sadie

EVP, Chief HR Officer · 10b5-1

$130.5K

1.5K sh · $88.99

Own -1%
Sell·S
Jul 15, 25

Brown Michael Jon

EVP, Chief Legal Officer · 10b5-1

$43.0K

500 sh · $86.03

Own -1%
Sell·S
Jul 15, 25

FOLETTA MARK G

Director · 10b5-1

$233.5K

2.7K sh · $85.17

Own -5%
Sell·S
Jul 15, 25

FOLETTA MARK G

Director · 10b5-1

$688

8 sh · $86.03

Own -0%
Sell·S
Jun 26, 25

Stern Sadie

EVP, Chief HR Officer · 10b5-1

$124.7K

1.5K sh · $85.06

Own -1%

Date▾	Insider	Role	Type	Shares	Own Δ	Price	Value
Mar 16, 2026	Brown Michael Jon 10b5-1	EVP, Chief Legal Officer	Sell S	1.7K	-1%	$64.85	$110.2K
Mar 8, 2026	Stern Sadie	EVP, Chief HR Officer	Grant A	39.0K	+36%	—	$0
Mar 8, 2026	Stern Sadie	EVP, Chief HR Officer	Other F	17.2K	-12%	$68.10	$1.2M
Mar 8, 2026	Sylvain Jereme M KEY	EVP, Chief Financal Officer	Other F	18.9K	-11%	$68.10	$1.3M
Mar 8, 2026	Sylvain Jereme M KEY	EVP, Chief Financal Officer	Grant A	48.8K	+40%	—	$0
Mar 8, 2026	Brown Michael Jon	EVP, Chief Legal Officer	Other F	23.3K	-17%	$68.10	$1.6M
Mar 8, 2026	Brown Michael Jon	EVP, Chief Legal Officer	Grant A	39.0K	+39%	—	$0
Mar 8, 2026	Coleman Jon	EVP, Chief Commercial Officer	Grant A	43.9K	+64%	—	$0
Mar 8, 2026	Leach Jacob Steven KEY	President, CEO, and Director	Grant A	104.5K	+31%	—	$0
Mar 8, 2026	Leach Jacob Steven KEY	President, CEO, and Director	Other F	19.8K	-4%	$68.10	$1.3M
Mar 8, 2026	SAYER KEVIN R KEY	Executive Chair	Grant A	32.7K	+8%	—	$0
Mar 8, 2026	SAYER KEVIN R KEY	Executive Chair	Other F	32.5K	-7%	$68.10	$2.2M
Feb 26, 2026	Osterloh Albert Frederick IV	Director	Grant A	7.1K	New	—	$0
Feb 12, 2026	Heller Bridgette P 10b5-1	Director	Sell S	1.0K	-4%	$68.01	$68.8K
Jan 29, 2026	Sylvain Jereme M KEY	EVP, Chief Financal Officer	Other F	2.7K	-2%	$73.36	$194.6K
Jan 29, 2026	Sylvain Jereme M KEY	EVP, Chief Financal Officer	Grant A	7.1K	+6%	—	$0
Jan 29, 2026	SAYER KEVIN R KEY	Executive Chair	Other F	34.3K	-8%	$73.36	$2.5M
Jan 29, 2026	SAYER KEVIN R KEY	Executive Chair	Grant A	71.2K	+19%	—	$0
Jan 29, 2026	Brown Michael Jon	EVP, Chief Legal Officer	Other F	2.7K	-3%	$73.36	$194.6K
Jan 29, 2026	Brown Michael Jon	EVP, Chief Legal Officer	Grant A	7.1K	+8%	—	$0
Jan 29, 2026	Stern Sadie	EVP, Chief HR Officer	Grant A	7.1K	+7%	—	$0
Jan 29, 2026	Stern Sadie	EVP, Chief HR Officer	Other F	2.7K	-2%	$73.36	$194.8K
Jan 29, 2026	Leach Jacob Steven KEY	President, CEO, and Director	Grant A	8.3K	+3%	—	$0
Jan 29, 2026	Leach Jacob Steven KEY	President, CEO, and Director	Other F	3.1K	-1%	$73.36	$224.3K
Nov 14, 2025	Collins Richard Alexander 10b5-1	Director	Sell S	2.9K	-8%	$59.05	$171.6K
Nov 12, 2025	Heller Bridgette P 10b5-1	Director	Sell S	1.0K	-4%	$58.07	$58.8K
Nov 10, 2025	Leach Jacob Steven KEY	President & COO	Buy P	15.7K	+5%	$54.98	$863.2K
Nov 10, 2025	Leach Jacob Steven KEY	President & COO	Buy P	2.5K	+1%	$55.43	$138.6K
Nov 10, 2025	Collins Richard Alexander 10b5-1	Director	Sell S	3.9K	-9%	$55.17	$217.8K
Oct 24, 2025	Ashley Euan A.	Director	Grant A	7.2K	New	—	$0
Sep 5, 2025	Malady Kyle 10b5-1	Director	Sell S	667	-3%	$80.86	$53.9K
Sep 4, 2025	Stern Sadie 10b5-1	EVP, Chief HR Officer	Sell S	1.5K	-1%	$80.00	$117.3K
Sep 2, 2025	Sylvain Jereme M KEY 10b5-1	EVP, Chief Financal Officer	Sell S	4.8K	-4%	$74.17	$357.8K
Aug 15, 2025	Brown Michael Jon 10b5-1	EVP, Chief Legal Officer	Sell S	500	-1%	$80.29	$40.1K
Aug 15, 2025	FOLETTA MARK G 10b5-1	Director	Sell S	2.6K	-5%	$81.02	$207.0K
Aug 15, 2025	FOLETTA MARK G 10b5-1	Director	Sell S	195	-0%	$81.54	$15.9K
Jul 28, 2025	Stern Sadie 10b5-1	EVP, Chief HR Officer	Sell S	1.5K	-1%	$88.99	$130.5K
Jul 15, 2025	Brown Michael Jon 10b5-1	EVP, Chief Legal Officer	Sell S	500	-1%	$86.03	$43.0K
Jul 15, 2025	FOLETTA MARK G 10b5-1	Director	Sell S	2.7K	-5%	$85.17	$233.5K
Jul 15, 2025	FOLETTA MARK G 10b5-1	Director	Sell S	8	-0%	$86.03	$688
Jun 26, 2025	Stern Sadie 10b5-1	EVP, Chief HR Officer	Sell S	1.5K	-1%	$85.06	$124.7K

About DXCM insider trading

This page tracks insider transactions for DEXCOM INC (DXCM) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.