DXCMNasdaq · Surgical & Medical Instruments & Apparatus

DEXCOM INC

Alert me on DXCM

Insider buys, 6 months

Congress trades, 6 months

Signals, 6 months

Six months

After each filing

Oct 20 Sale Brown Michael Jon Insider

1 week

Result in2 trading days

1 month

Result in18 trading days

3 months

Result in60 trading days

6 months

Result in123 trading days

Oct 1 Sale Stern Sadie Insider

1 week

−2.1%S&P +1.3%

1 month

Result in5 trading days

3 months

Result in47 trading days

6 months

Result in110 trading days

Sep 17 Sale Brown Michael Jon Insider

1 week

−0.5%S&P +0.9%

1 month

−2.1%S&P +0.3%

3 months

Result in37 trading days

6 months

Result in100 trading days

Sep 17 Sale AUGUSTINOS NICHOLAS Insider

1 week

−0.5%S&P +0.9%

1 month

−2.1%S&P +0.3%

3 months

Result in37 trading days

6 months

Result in100 trading days

Sep 15 Sale Sylvain Jereme M Insider

1 week

+3.6%S&P +2.4%

1 month

−3.4%S&P +1.9%

3 months

Result in35 trading days

6 months

Result in98 trading days

Show all 38

Aug 29 Sale Stern Sadie Insider

1 week

−7.2%S&P −0.1%

1 month

−5.2%S&P −0.3%

3 months

Result in25 trading days

6 months

Result in88 trading days

Aug 25 Sale SAYER KEVIN R Insider

1 week

+1.1%S&P −0.5%

1 month

−1.9%S&P +0.4%

3 months

Result in21 trading days

6 months

Result in84 trading days

Aug 18 Sale Brown Michael Jon Insider

1 week

−0.5%S&P −0.2%

1 month

−1.9%S&P −0.6%

3 months

Result in16 trading days

6 months

Result in79 trading days

Aug 14 Sale Heller Bridgette P Insider

1 week

+2.9%S&P −1.4%

1 month

−3.7%S&P −2.4%

3 months

Result in14 trading days

6 months

Result in77 trading days

Aug 5 Sale FOLETTA MARK G Insider

1 week

+9.8%S&P +0.4%

1 month

+8.5%S&P +0.4%

3 months

Result in7 trading days

6 months

Result in70 trading days

Jul 22 Sale SAYER KEVIN R Insider

1 week

+5.2%S&P −2.4%

1 month

+26.3%S&P +2.0%

3 months

+20.0%S&P +3.2%

6 months

Result in60 trading days

Jul 17 Sale Brown Michael Jon Insider

1 week

−6.7%S&P −0.6%

1 month

+15.8%S&P +4.0%

3 months

+14.4%S&P +4.1%

6 months

Result in57 trading days

Jul 8 Sale SAYER KEVIN R Insider

1 week

−1.8%S&P +1.3%

1 month

+12.1%S&P +3.1%

3 months

+12.6%S&P +4.8%

6 months

Result in50 trading days

Jun 18 Sale Brown Michael Jon Insider

1 week

−3.2%S&P −2.4%

1 month

+3.1%S&P +0.2%

3 months

+23.3%S&P +2.3%

6 months

Result in38 trading days

Jun 18 Sale FOLETTA MARK G Insider

1 week

−3.2%S&P −2.4%

1 month

+3.1%S&P +0.2%

3 months

+23.3%S&P +2.3%

6 months

Result in38 trading days

Jun 6 Sale Coleman Jon Insider

1 week

−3.1%S&P +2.1%

1 month

−4.7%S&P +1.9%

3 months

+10.3%S&P +3.9%

6 months

Result in30 trading days

May 27 Sale SAYER KEVIN R Insider

1 week

+3.6%S&P +0.5%

1 month

−0.2%S&P −2.6%

3 months

+26.6%S&P +2.3%

6 months

Result in22 trading days

May 20 Sale Brown Michael Jon Insider

1 week

+1.3%S&P +1.8%

1 month

−3.3%S&P +0.7%

3 months

+26.3%S&P +3.1%

6 months

Result in18 trading days

May 15 Sale Heller Bridgette P Insider

1 week

+17.0%S&P +0.9%

1 month

+18.7%S&P +1.5%

3 months

+44.0%S&P +4.8%

6 months

Result in15 trading days

May 10 Sale Sen. Tina Smith Senate

1 week

+9.7%S&P −0.1%

1 month

+26.0%S&P −1.9%

3 months

+50.9%S&P +4.5%

6 months

Result in11 trading days

Apr 17 Sale Brown Michael Jon Insider

1 week

−3.8%S&P +0.5%

1 month

+1.7%S&P +4.0%

3 months

+18.3%S&P +4.8%

6 months

+34.5%S&P +8.0%

Mar 19 Sale Brown Michael Jon Insider

1 week

−1.8%S&P −2.0%

1 month

−3.9%S&P +7.7%

3 months

+7.7%S&P +13.8%

6 months

+32.8%S&P +16.3%

Feb 18 Sale Heller Bridgette P Insider

1 week

+0.5%S&P +1.0%

1 month

−7.6%S&P −3.9%

3 months

−8.0%S&P +7.2%

6 months

+23.5%S&P +12.7%

Feb 15 Buy Sen. John Boozman Senate

1 week

+3.8%S&P +0.7%

1 month

−3.9%S&P −3.1%

3 months

−7.6%S&P +8.5%

6 months

+27.2%S&P +13.0%

Nov 18, 2025 Sale Collins Richard Alexander Insider

1 week

+2.5%S&P +2.3%

1 month

+9.5%S&P +2.5%

3 months

+21.5%S&P +4.8%

6 months

+19.5%S&P +13.2%

Nov 13, 2025 Sale Heller Bridgette P Insider

1 week

−2.2%S&P −2.9%

1 month

+10.1%S&P +1.3%

3 months

+17.9%S&P +1.9%

6 months

+9.0%S&P +10.5%

Nov 11, 2025 Buy Leach Jacob Steven Insider

1 week

+3.5%S&P −3.4%

1 month

+18.6%S&P +0.9%

3 months

+12.0%S&P 0.0%

6 months

−0.5%S&P +10.2%

Nov 11, 2025 Sale Collins Richard Alexander Insider

1 week

+3.5%S&P −3.4%

1 month

+18.6%S&P +0.9%

3 months

+12.0%S&P 0.0%

6 months

−0.5%S&P +10.2%

Sep 10, 2025 Sale Malady Kyle Insider

1 week

+0.6%S&P +1.1%

1 month

−10.4%S&P +3.2%

3 months

−12.7%S&P +5.0%

6 months

−14.1%S&P +2.7%

Sep 9, 2025 Sale Stern Sadie Insider

1 week

−2.4%S&P +1.5%

1 month

−13.5%S&P +3.8%

3 months

−16.3%S&P +5.4%

6 months

−15.4%S&P +4.6%

Sep 5, 2025 Sale Sylvain Jereme M Insider

1 week

−5.3%S&P +1.6%

1 month

−17.6%S&P +4.1%

3 months

−19.0%S&P +6.0%

6 months

−14.6%S&P +5.4%

Jun 22, 2025 Buy Rep. Jefferson Shreve House

1 week

+9.3%S&P +2.9%

1 month

+8.3%S&P +5.7%

3 months

−12.9%S&P +11.4%

6 months

−17.3%S&P +14.0%

Jun 22, 2025 Sale Rep. Jefferson Shreve House

1 week

+9.3%S&P +2.9%

1 month

+8.3%S&P +5.7%

3 months

−12.9%S&P +11.4%

6 months

−17.3%S&P +14.0%

Jun 9, 2025 Buy Rep. Rob Bresnahan House

1 week

−3.5%S&P −0.9%

1 month

−1.7%S&P +3.7%

3 months

−10.4%S&P +8.5%

6 months

−21.8%S&P +13.9%

May 8, 2025 Sale Rep. Jefferson Shreve House

1 week

+1.0%S&P +5.3%

1 month

+0.2%S&P +6.9%

3 months

−8.1%S&P +13.0%

6 months

−35.0%S&P +19.6%

Apr 28, 2025 Sale Rep. Rob Bresnahan House

1 week

+14.3%S&P +0.8%

1 month

+19.0%S&P +6.4%

3 months

+24.9%S&P +14.8%

6 months

−2.9%S&P +24.7%

Mar 27, 2025 Buy Rep. Rob Bresnahan House

1 week

−11.7%S&P −9.1%

1 month

+5.3%S&P −0.2%

3 months

+28.9%S&P +11.5%

6 months

−1.9%S&P +20.1%

Jan 15, 2025 Sale Rep. Kevin Hern House

1 week

+4.6%S&P +2.8%

1 month

+6.7%S&P +3.4%

3 months

−19.2%S&P −10.8%

6 months

−1.0%S&P +6.9%

Every purchase and sale on this ticker reported by a member of Congress or an insider, measured from the close of the first trading day after it became public to the close 1 week, 1 month, 3 months and 6 months later, each beside the S&P over the same days.

Filings for DXCM

107 held · newest 5107 held · newest 2

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New sources, new features and offers like our founding price. A few times a month at most. Stop any time.

Signal history

No signal for this ticker yet. A signal is written when insider buying here scores one dot or more.

Stakes

Mar 31, 2026 Schedule 13G

Vanguard Capital Management: 7.5%, 28,848,218 shares

Mar 31, 2026 Schedule 13G

Vanguard Portfolio Management: 5%, 19,322,566 shares

Mar 13, 2026 Schedule 13G, amended

The Vanguard Group: 0%, 0 shares

Sep 30, 2025 Schedule 13G, amended

The Vanguard Group: 12.6%, 49,455,578 shares

Schedule 13D is filed within 5 business days of crossing 5 percent by an investor who may seek to influence the company. Schedule 13G is filed by a passive holder, and a large institution has up to 45 days after the quarter end.

Government contracts, last 12 months

Awards of $10M and up, from USAspending · context, not a signal

No contracts of $10M or more in the last 12 months.

Lobbying

Last four quarters

$390KQ4 2025

$380KQ1 2026

$370KQ2 2026

$320KQ3 2026

Down 14 percent from Q2 2026. Reported by the company to the Senate each quarter.Original report ↗

Read from LDA.gov between Sep 23, 2026 and Oct 21, 2026. Senate Office of Public Records cannot vouch for the data or analyses derived from these data after the data have been retrieved from LDA.gov.