Michael Jon Brown

CIK: 0001899922

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)14 (63.6%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)4 (18.2%)

Compensation grants

Other (G, F, J, C, D, …)4 (18.2%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

DXCM

DEXCOM INC

Officer

Discretionary Trading P&L

Holdings

Transaction History (22 total)

DXCM
DEXCOM INC
Oct 15, 2026
Sale(S)
Direct
1.7K shares at avg. $85.48$145K
DXCM
DEXCOM INC
Sep 15, 2026
Sale(S)
Direct
1.7K shares at avg. $84.04$143K
DXCM
DEXCOM INC
Aug 22, 2026
Tax Payment(F)
Direct
1.5K shares at avg. $92.34$134K
DXCM
DEXCOM INC
Aug 14, 2026
Sale(S)
Direct
1.7K shares at avg. $91.93$156K
DXCM
DEXCOM INC
Jul 15, 2026
Sale(S)
Direct
1.7K shares at avg. $74.42$127K
DXCM
DEXCOM INC
Jun 15, 2026
Sale(S)
Direct
1.7K shares at avg. $75.55$128K
DXCM
DEXCOM INC
May 22, 2026
Tax Payment(F)
Direct
1.5K shares at avg. $71.90$104K
DXCM
DEXCOM INC
May 15, 2026
Sale(S)
Direct
1.7K shares at avg. $59.91$102K
DXCM
DEXCOM INC
Apr 15, 2026
Sale(S)
Direct
1.7K shares at avg. $63.04$107K
DXCM
DEXCOM INC
Mar 16, 2026
Sale(S)
Direct
1.7K shares at avg. $64.85$110K
DXCM
DEXCOM INC
Mar 8, 2026
Tax Payment(F)
Direct
23.3K shares at avg. $68.10$1.6M
DXCM
DEXCOM INC
Mar 8, 2026
Award(A)
Direct
39K shares-
DXCM
DEXCOM INC
Jan 29, 2026
Tax Payment(F)
Direct
2.7K shares at avg. $73.36$195K
DXCM
DEXCOM INC
Jan 29, 2026
Award(A)
Direct
7.1K shares-
DXCM
DEXCOM INC
Aug 15, 2025
Sale(S)
Direct
500 shares at avg. $80.29$40K
DXCM
DEXCOM INC
Jul 15, 2025
Sale(S)
Direct
500 shares at avg. $86.03$43K
DXCM
DEXCOM INC
Jun 16, 2025
Sale(S)
Direct
500 shares at avg. $82.80$41K
DXCM
DEXCOM INC
May 23, 2025
Sale(S)
Direct
10K shares at avg. $84.28$843K
DXCM
DEXCOM INC
Mar 12, 2025
Sale(S)
Direct
13K shares at avg. $70.38$915K
DXCM
DEXCOM INC
Mar 8, 2025
Award(A)
Direct
29.9K shares-
DXCM
DEXCOM INC
Mar 8, 2025
Award(A)
Direct
22.8K shares-
DXCM
DEXCOM INC
Aug 30, 2024
Sale(S)
Direct
686 shares at avg. $70.00$48K

		Type	Shares	Price		Ownership
Oct 15, 2026	DXCM DEXCOM INC	Sale(S)	1,700	$85.48	$145,316	Direct
Sep 15, 2026	DXCM DEXCOM INC	Sale(S)	1,700	$84.04	$142,868	Direct
Aug 22, 2026	DXCM DEXCOM INC	Tax Payment(F)	1,451	$92.34	$133,985	Direct
Aug 14, 2026	DXCM DEXCOM INC	Sale(S)	1,700	$91.93	$156,281	Direct
Jul 15, 2026	DXCM DEXCOM INC	Sale(S)	1,700	$74.42	$126,514	Direct
Jun 15, 2026	DXCM DEXCOM INC	Sale(S)	1,700	$75.55	$128,435	Direct
May 22, 2026	DXCM DEXCOM INC	Tax Payment(F)	1,451	$71.90	$104,327	Direct
May 15, 2026	DXCM DEXCOM INC	Sale(S)	1,700	$59.91	$101,847	Direct
Apr 15, 2026	DXCM DEXCOM INC	Sale(S)	1,700	$63.04	$107,168	Direct
Mar 16, 2026	DXCM DEXCOM INC	Sale(S)	1,700	$64.85	$110,245	Direct
Mar 8, 2026	DXCM DEXCOM INC	Tax Payment(F)	23,325	$68.10	$1,588,432	Direct
Mar 8, 2026	DXCM DEXCOM INC	Award(A)	39,019	-	$0	Direct
Jan 29, 2026	DXCM DEXCOM INC	Tax Payment(F)	2,653	$73.36	$194,624	Direct
Jan 29, 2026	DXCM DEXCOM INC	Award(A)	7,123	-	$0	Direct
Aug 15, 2025	DXCM DEXCOM INC	Sale(S)	500	$80.29	$40,145	Direct
Jul 15, 2025	DXCM DEXCOM INC	Sale(S)	500	$86.03	$43,015	Direct
Jun 16, 2025	DXCM DEXCOM INC	Sale(S)	500	$82.80	$41,400	Direct
May 23, 2025	DXCM DEXCOM INC	Sale(S)	10,000	$84.28	$842,849	Direct
Mar 12, 2025	DXCM DEXCOM INC	Sale(S)	13,000	$70.38	$914,941	Direct
Mar 8, 2025	DXCM DEXCOM INC	Award(A)	29,922	-	-	Direct
Mar 8, 2025	DXCM DEXCOM INC	Award(A)	22,798	-	-	Direct
Aug 30, 2024	DXCM DEXCOM INC	Sale(S)	686	$70.00	$48,020	Direct

1-22 of 22 transactions

About Brown Michael Jon

Brown Michael Jon (SEC CIK 0001899922) files insider reports with the SEC as EVP Chief Legal Compliance Off of DEXCOM INC (DXCM).

Signal8 holds 19 ownership filings by Brown Michael Jon, all Form 4s, filed between Sep 3, 2024 and Oct 19, 2026. Those filings report 22 transactions, from Aug 30, 2024 to Oct 15, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Brown Michael Jon's filings is in SAN DIEGO, CA.

Recent filings by Brown Michael Jon

Oct 15, 2026: Open-market sale of DXCM shares (Form 4, code S).
Sep 15, 2026: Open-market sale of DXCM shares (Form 4, code S).
Aug 22, 2026: Tax withholding of DXCM shares (Form 4, code F).
Aug 14, 2026: Open-market sale of DXCM shares (Form 4, code S).
Jul 15, 2026: Open-market sale of DXCM shares (Form 4, code S).

Other insiders filing for DEXCOM INC (DXCM)

Ashley Euan A., Director
Stern Sadie, EVP Chief People & Culture Off
AUGUSTINOS NICHOLAS, Director
Sylvain Jereme M, EVP, Chief Financal Officer
Boehnlein Glenn S, Director
Leach Jacob Steven, President, CEO, and Director

How to read Form 4 transaction codes