Company · Ownership research

DEXCOM INC DXCM

CIK 0001093557

Form 4 transactions dated Sep 1, 2023 to Sep 25, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

Insider filings on file run through 2026-09-10.

Insider purchases & sales

Purchased: $1.00M
Sold: $64.79M

Sep 1, 2023 – Sep 10, 2026
Available records · partial months are marked ·

2023, from Sep 1, 202310 of 16 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
2023-12-15	AUGUSTINOS NICHOLAS Director	Sale10b5-1 footnote	$489.13K 3,976 shares sold	10.46% sold Trust holding	▾
2023-12-15	ALTMAN STEVEN R Director	Sale10b5-1 footnote	$245.55K 2,000 shares sold	3.53% sold Trust holding	▾
2023-12-12	ALTMAN STEVEN R Director	Sale10b5-1 footnote	$360.00K 3,000 shares sold	5.03% sold Trust holding	▾
2023-12-11	Stern Sadie EVP Chief Human Resources Offi	Sale10b5-1 footnote	$46.12K 392 shares sold	0.51% sold Direct holding	▾
2023-12-01	Brown Michael Jon EVP Chief Legal Officer	Sale10b5-1 footnote	$413.77K 3,612 shares sold	5.83% sold Direct holding	▾
2023-11-24	Pacelli Steven Robert EVP Managing Director Dexcom V	Sale10b5-1 footnote	$45.54K 411 shares sold	0.33% sold Direct holding	▾
2023-11-22	Stern Sadie EVP Chief Human Resources Offi	Sale10b5-1 footnote	$129.36K 1,176 shares sold	1.52% sold Direct holding	▾
2023-11-15	ALTMAN STEVEN R Director	Sale10b5-1 footnote	$101.26K 1,000 shares sold	1.65% sold Trust holding	▾
2023-11-09	Naganathan Girish EVP Chief Technology Officer	Sale	$254.16K 2,725 shares sold	5.40% sold Direct holding	▾
2023-11-08	Regan Barry J. EVP Operations	Sale10b5-1 footnote	$192.25K 2,019 shares sold	3.05% sold Direct holding	▾

Showing 16 / 16 record groups in 2023. The complete set is available through the API.

DEXCOM INC · DXCM

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The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. For the year shown, this page lists 16 of 16 purchase / sale groups and 8 of 8 other groups; the totals and the monthly series cover the whole window.

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{"ticker":"DXCM","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

Non-cancelled, non-derivative purchase (P) and sale (S) rows dated inside the public window, as reported. Includes open-market and private transactions. Data after the latest filing is not asserted complete and is not zero-filled. A grouped event shares filing, transaction date, security, code, direction, ownership bucket and source. Derivative groups also match underlying security, exercise price, exercise/expiration dates and footnote references. Reported rows are retained; P/S price lots can be grouped. Post-transaction balances are never summed.