DexCom, Inc. (DXCM) Insider Trading

Last 12 months

Insiders bought $1M and sold $12.8M on the open market.

All of the selling was scheduled in advance under 10b5-1 plans.

Net open-market

−$11.8M

1 buy · 25 sales

Under a 10b5-1 plan

100%

of the value sold

Insiders who bought / sold

1 / 9

executives and directors

Last open-market buy

Nov 2025

Nov 10, 2025

Get an email when DXCM's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Oct 15	Michael Jon Brown EVP Chief Legal Compliance Off	Sold10b5-1 plan	1,700	$85.48	$145k	1.7%	Form 4
Sep 28	Sadie Stern EVP Chief People & Culture Off	Sold10b5-1 plan	2,565	$86.15	$221k	2.0%	Form 4
Sep 14 – 15	Nicholas Augustinos Director	Sold10b5-1 plan 2 parts	8,089	$84.04 average	$680k	19%	Form 4
Sep 15	Michael Jon Brown EVP Chief Legal Compliance Off	Sold10b5-1 plan	1,700	$84.04	$143k	1.7%	Form 4
Sep 10	Jereme M Sylvain EVP, Chief Financal Officer	Sold10b5-1 plan	3,638	$83.27	$303k	2.4%	Form 4
Aug 27	Sadie Stern EVP Chief People & Culture Off	Sold10b5-1 plan	2,565	$88.37	$227k	2.0%	Form 4
Aug 20	Kevin R Sayer Executive Chair	Sold10b5-1 plan 3 parts	26,756	$90.01 average	$2.41M	8.1%	Form 4
Aug 14	Michael Jon Brown EVP Chief Legal Compliance Off	Sold10b5-1 plan	1,700	$91.93	$156k	1.6%	Form 4
Aug 12	Bridgette P Heller Director	Sold10b5-1 plan	1,012	$88.29	$89k	3.3%	Form 4
Jul 31 – Aug 3	Mark G Foletta Director	Sold10b5-1 plan 2 parts	4,000	$82.66 average	$331k	6.8%	Form 4
Jul 20	Kevin R Sayer Executive Chair	Sold10b5-1 plan	26,756	$76.32	$2.04M	7.5%	Form 4
Jul 15	Michael Jon Brown EVP Chief Legal Compliance Off	Sold10b5-1 plan	1,700	$74.42	$127k	1.6%	Form 4
Jul 6	Kevin R Sayer Executive Chair	Sold10b5-1 plan	26,756	$72.00	$1.93M	7.0%	Form 4
Jun 15	Michael Jon Brown EVP Chief Legal Compliance Off	Sold10b5-1 plan	1,700	$75.55	$128k	1.6%	Form 4
Jun 15	Mark G Foletta Director	Sold10b5-1 plan 2 parts	4,000	$74.14 average	$297k	6.3%	Form 4
Jun 3 – 4	Jon Coleman EVP, Chief Commercial Officer	Sold10b5-1 plan 2 parts	9,823	$73.56 average	$723k	9.3%	Form 4
May 21	Kevin R Sayer Executive Chair	Sold10b5-1 plan	26,759	$72.00	$1.93M	6.5%	Form 4
May 15	Michael Jon Brown EVP, Chief Legal Officer	Sold10b5-1 plan	1,700	$59.91	$102k	1.5%	Form 4
May 12	Bridgette P Heller Director	Sold10b5-1 plan	1,012	$60.01	$61k	3.9%	Form 4
Apr 15	Michael Jon Brown EVP, Chief Legal Officer	Sold10b5-1 plan	1,700	$63.04	$107k	1.5%	Form 4
Mar 16	Michael Jon Brown EVP, Chief Legal Officer	Sold10b5-1 plan	1,700	$64.85	$110k	1.5%	Form 4
Feb 12	Bridgette P Heller Director	Sold10b5-1 plan	1,012	$68.01	$69k	3.7%	Form 4
Nov 14, 2025	Richard Alexander Collins Director	Sold10b5-1 plan	2,906	$59.05	$172k	6.7%	Form 4
Nov 12, 2025	Bridgette P Heller Director	Sold10b5-1 plan	1,012	$58.07	$59k	3.6%	Form 4
Nov 10, 2025	Jacob Steven Leach President & COO	Bought 2 parts	18,200	$55.04 average	$1M	5.0%	Form 4
Nov 10, 2025	Richard Alexander Collins Director	Sold10b5-1 plan	3,948	$55.17	$218k	8.4%	Form 4
Sep 5, 2025	Kyle Malady Director	Sold10b5-1 plan	667	$80.86	$54k	2.9%	Form 4
Sep 4, 2025	Sadie Stern EVP, Chief HR Officer	Sold10b5-1 plan	1,466	$80.00	$117k	1.4%	Form 4
Sep 2, 2025	Jereme M Sylvain EVP, Chief Financal Officer	Sold10b5-1 plan	4,824	$74.17	$358k	3.9%	Form 4
Aug 15, 2025	Michael Jon Brown EVP, Chief Legal Officer	Sold10b5-1 plan	500	$80.29	$40k	0.5%	Form 4
Aug 15, 2025	Mark G Foletta Director	Sold10b5-1 plan 2 parts	2,750	$81.06 average	$223k	4.6%	Form 4
Jul 28, 2025	Sadie Stern EVP, Chief HR Officer	Sold10b5-1 plan	1,466	$88.99	$130k	1.4%	Form 4
Jul 15, 2025	Mark G Foletta Director	Sold10b5-1 plan 2 parts	2,750	$85.17 average	$234k	4.4%	Form 4
Jul 15, 2025	Michael Jon Brown EVP, Chief Legal Officer	Sold10b5-1 plan	500	$86.03	$43k	0.5%	Form 4
Jun 26, 2025	Sadie Stern EVP, Chief HR Officer	Sold10b5-1 plan	1,466	$85.06	$125k	1.3%	Form 4
Jun 16, 2025	Mark G Foletta Director	Sold10b5-1 plan	2,750	$83.13	$229k	4.2%	Form 4
Jun 16, 2025	Michael Jon Brown EVP, Chief Legal Officer	Sold10b5-1 plan	500	$82.80	$41k	0.5%	Form 4
Jun 13, 2025 – Jun 16, 2025	Nicholas Augustinos Director	Sold10b5-1 plan 2 parts	6,290	$82.34 average	$518k	14%	Form 4
May 27, 2025	Sadie Stern EVP, Chief HR Officer	Sold10b5-1 plan	6,184	$85.11	$526k	5.3%	Form 4
May 23, 2025	Michael Jon Brown EVP, Chief Legal Officer	Sold10b5-1 plan	10,000	$84.28	$843k	9.5%	Form 4

Oct 1510b5-1 plan
Michael Jon Brown
EVP Chief Legal Compliance Off · sold 1,700 at $85.48
$145k
1.7% of stake
Sep 2810b5-1 plan
Sadie Stern
EVP Chief People & Culture Off · sold 2,565 at $86.15
$221k
2.0% of stake
Sep 14 – 1510b5-1 plan
Nicholas Augustinos
Director · sold 8,089 at avg $84.04
$680k
19% of stake
Sep 1510b5-1 plan
Michael Jon Brown
EVP Chief Legal Compliance Off · sold 1,700 at $84.04
$143k
1.7% of stake
Sep 1010b5-1 plan
Jereme M Sylvain
EVP, Chief Financal Officer · sold 3,638 at $83.27
$303k
2.4% of stake
Aug 2710b5-1 plan
Sadie Stern
EVP Chief People & Culture Off · sold 2,565 at $88.37
$227k
2.0% of stake
Aug 2010b5-1 plan
Kevin R Sayer
Executive Chair · sold 26,756 at avg $90.01
$2.41M
8.1% of stake
Aug 1410b5-1 plan
Michael Jon Brown
EVP Chief Legal Compliance Off · sold 1,700 at $91.93
$156k
1.6% of stake
Aug 1210b5-1 plan
Bridgette P Heller
Director · sold 1,012 at $88.29
$89k
3.3% of stake
Jul 31 – Aug 310b5-1 plan
Mark G Foletta
Director · sold 4,000 at avg $82.66
$331k
6.8% of stake
Jul 2010b5-1 plan
Kevin R Sayer
Executive Chair · sold 26,756 at $76.32
$2.04M
7.5% of stake
Jul 1510b5-1 plan
Michael Jon Brown
EVP Chief Legal Compliance Off · sold 1,700 at $74.42
$127k
1.6% of stake
Jul 610b5-1 plan
Kevin R Sayer
Executive Chair · sold 26,756 at $72.00
$1.93M
7.0% of stake
Jun 1510b5-1 plan
Michael Jon Brown
EVP Chief Legal Compliance Off · sold 1,700 at $75.55
$128k
1.6% of stake
Jun 1510b5-1 plan
Mark G Foletta
Director · sold 4,000 at avg $74.14
$297k
6.3% of stake
Jun 3 – 410b5-1 plan
Jon Coleman
EVP, Chief Commercial Officer · sold 9,823 at avg $73.56
$723k
9.3% of stake
May 2110b5-1 plan
Kevin R Sayer
Executive Chair · sold 26,759 at $72.00
$1.93M
6.5% of stake
May 1510b5-1 plan
Michael Jon Brown
EVP, Chief Legal Officer · sold 1,700 at $59.91
$102k
1.5% of stake
May 1210b5-1 plan
Bridgette P Heller
Director · sold 1,012 at $60.01
$61k
3.9% of stake
Apr 1510b5-1 plan
Michael Jon Brown
EVP, Chief Legal Officer · sold 1,700 at $63.04
$107k
1.5% of stake
Mar 1610b5-1 plan
Michael Jon Brown
EVP, Chief Legal Officer · sold 1,700 at $64.85
$110k
1.5% of stake
Feb 1210b5-1 plan
Bridgette P Heller
Director · sold 1,012 at $68.01
$69k
3.7% of stake
Nov 14, 202510b5-1 plan
Richard Alexander Collins
Director · sold 2,906 at $59.05
$172k
6.7% of stake
Nov 12, 202510b5-1 plan
Bridgette P Heller
Director · sold 1,012 at $58.07
$59k
3.6% of stake
Nov 10, 2025
Jacob Steven Leach
President & COO · bought 18,200 at avg $55.04
$1M
5.0% of stake
Nov 10, 202510b5-1 plan
Richard Alexander Collins
Director · sold 3,948 at $55.17
$218k
8.4% of stake
Sep 5, 202510b5-1 plan
Kyle Malady
Director · sold 667 at $80.86
$54k
2.9% of stake
Sep 4, 202510b5-1 plan
Sadie Stern
EVP, Chief HR Officer · sold 1,466 at $80.00
$117k
1.4% of stake
Sep 2, 202510b5-1 plan
Jereme M Sylvain
EVP, Chief Financal Officer · sold 4,824 at $74.17
$358k
3.9% of stake
Aug 15, 202510b5-1 plan
Michael Jon Brown
EVP, Chief Legal Officer · sold 500 at $80.29
$40k
0.5% of stake
Aug 15, 202510b5-1 plan
Mark G Foletta
Director · sold 2,750 at avg $81.06
$223k
4.6% of stake
Jul 28, 202510b5-1 plan
Sadie Stern
EVP, Chief HR Officer · sold 1,466 at $88.99
$130k
1.4% of stake
Jul 15, 202510b5-1 plan
Mark G Foletta
Director · sold 2,750 at avg $85.17
$234k
4.4% of stake
Jul 15, 202510b5-1 plan
Michael Jon Brown
EVP, Chief Legal Officer · sold 500 at $86.03
$43k
0.5% of stake
Jun 26, 202510b5-1 plan
Sadie Stern
EVP, Chief HR Officer · sold 1,466 at $85.06
$125k
1.3% of stake
Jun 16, 202510b5-1 plan
Mark G Foletta
Director · sold 2,750 at $83.13
$229k
4.2% of stake
Jun 16, 202510b5-1 plan
Michael Jon Brown
EVP, Chief Legal Officer · sold 500 at $82.80
$41k
0.5% of stake
Jun 13, 2025 – Jun 16, 202510b5-1 plan
Nicholas Augustinos
Director · sold 6,290 at avg $82.34
$518k
14% of stake
May 27, 202510b5-1 plan
Sadie Stern
EVP, Chief HR Officer · sold 6,184 at $85.11
$526k
5.3% of stake
May 23, 202510b5-1 plan
Michael Jon Brown
EVP, Chief Legal Officer · sold 10,000 at $84.28
$843k
9.5% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch DXCM, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Spot a number that looks wrong? Check it in DXCM's SEC filings or

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Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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