Sadie Stern

CIK 1797971 · EVP Chief People & Culture Off · last filed 2026-11-10

Sadie Stern is an EVP Chief People & Culture Off who has filed 63 SEC Form 4 insider transactions across 3 companies since 2020. The most recent filing shows the insider had shares withheld for taxes covering $115.2K of DXCM on Nov 10, 2026. Across all open-market trades the lifetime net is −$8.4M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $10.1M across reported positions. 15 Form 144 notices of planned sales are also on file; the latest, for DXCM on Oct 27, 2026, lists the filer as an officer. 1 sale listed on those notices, worth $204.1K in all, has no matching Form 4.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

Disclosed Exposure

$10.13M

Companies

Total Filings

Lifetime Open-Market Net

-$8.36M

Charts

Trading activity, where the exposure sits, and each trade against the stock price.

DXCM price and trades

Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.

Shares held

Shares owned after each reported transaction on this company (direct holdings as reported).

Open-market buying and selling

by month

Dollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.

Exposure by company

latest

OfficerDirector10% owner* stale (no filing in 3 yrs)

Most recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.

Filer Profile

Reported Address

6340 SEQUENCE DRIVE
SAN DIEGO, CA 92121

Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

Holdings By Company

Latest on-record share count in each company: direct shares plus every indirect holder (trusts, LLCs, partnerships, family members) on the latest Form 4 that lists them. Disclosed exposure = shares × current underlying price.

Symbol	Role	Shares	Price	Disclosed Exposure	Lifetime OM Net	Filings	Latest Filed
DXCM	EVP Chief People & Culture Off	119,462	$83.58	$9.98M	-$8.33M	42	2026-11-10
Sonendo, Inc. (SONX) Delisted	Director	300	$0.60	$180	$0	2	2023-06-20
DDD	EVP, People and Culture	94,378	$1.53	$144.4K	-$30.4K	4	2020-08-18

Recent Filings

63 filings

Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144, so not all of them end in a sale. Under each notice: the role the filer ticked on it, and whether a sale followed (a Form 4 sale within 30 days, or a sale listed on a later notice).

Filed	Symbol	Action	Net Shares	Net $	Link
2026-11-10	DXCM	Tax (F)	−1,451	-$115.2K	EDGAR
2026-10-28	DXCM	Sell (S)	−2,565	-$201.7K	EDGAR
2026-10-27	DXCM	Notice (144) Officer · Planned Oct 27, 2026 · 10b5-1 plan Sold: Form 4 filed Oct 28, 2026	−2,565	-$201.7K	EDGAR
2026-09-30	DXCM	Sell (S)	−2,565	-$221.0K	EDGAR
2026-09-28	DXCM	Notice (144) Officer · Planned Sep 28, 2026 · 10b5-1 plan Sold: Form 4 filed Sep 30, 2026	−2,565	-$221.0K	EDGAR
2026-08-28	DXCM	Sell (S)	−2,565	-$226.7K	EDGAR
2026-08-27	DXCM	Notice (144) Officer · Planned Aug 27, 2026 · 10b5-1 plan Sold: Form 4 filed Aug 28, 2026	−2,565	-$226.7K	EDGAR
2026-08-25	DXCM	Tax (F)	−1,451	-$134.0K	EDGAR
2026-05-27	DXCM	Tax (F)	−1,451	-$104.3K	EDGAR
2026-03-10	DXCM	Mixed	+21,820	-$1.17M	EDGAR

Showing 1–10 of 63

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Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment, and an amended or cancelled notice is not listed. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes. Someone who is no longer an officer or director (or never was) files no Form 4, so for them a sale shows up only on a later notice, which lists the seller's sales from the 3 months before it. "No sale on file" means neither record shows one; a dash in Net $ means the value filed on the notice doesn't fit the stock's price (likely a typo).

Sales Reported Only on Form 144

1 sale · $204.1K

Each Form 144 lists the seller's sales of the company's stock in the 3 months before it. These are the sales on this filer's notices that no Form 4 on file shows, which is the usual case once someone is no longer an officer or director, or for an affiliate who never files Form 4s. Each sale is listed once, with the first notice that reported it.

Sold	Symbol	Shares	Proceeds	Avg Price	Listed On
2023-12-18	DXCM	1,675	$204.1K	$121.85	2024-03-12