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Stock brief · the live tape
DXCMDexCom, Inc.
Health Care
$90.82
▲ $15.68 (+20.9%) · 30dclose Friday, August 28, 2026
Disclosed flow is mixed.
5 members · 10 disclosed trades · 40 insider filings
The Hill
▲ 4▼ 6
4 buys · 6 sellsThe Boardroom
▲ 14▼ 26
14 buys · 26 sells · 40 filingsFeeding Time13F lens lands with fund ingestion
What is behind it
Recent Signal Scores, decayed50
Events counted, 90d23
Net congressional flowmixed
The tape
Price with a twin dot per disclosed trade: filled at the trade, hollow at the filing. The dashed gap is what the market did in between, not anyone’s return.
trade (congress)filingtrade (insider)call legput leg
The cost of chasing
Each rail runs from their trade to their filing. The hatched part is the move a copier missed to the disclosure lag; the solid part is what copying at the filing kept.
Smith+49.1+53.1
Smith+57.8+53.1
Boozman+23.8+29.0
Shreve+6.8+13.8
Shreve+6.4+13.8
Bresnahan+6.0+6.0
Shreve+47.4+6.4
Bresnahan+49.6+27.6
Bresnahan+2.8+30.7
Hern+16.8+13.0
Median copy kept +20.7% from the filing vs +20.3% from the trade date; the lag took -0.4 pts. The S&P returned +29.5% over the same windows. Numbers describe the window shown; they are not a forecast.
Who is behind it
Congress members with a disclosed position, biggest first. Click through to their dossier.
Tina SmithSenate · Agriculture, Nutrition & Forestry · Banking, Housing & Urban AffairsFiled this one in 3dsold$350KJefferson ShreveHouse · AppropriationsFiled this one in 41dmixed$98KKevin HernHouse · Ways & MeansFiled this one in 15dsold$75KRobert P. Bresnahan, Jr.House · Transportation & Infrastructure · AgricultureFiled this one in 25dmixed$24KJohn BoozmanSenate · Agriculture, Nutrition & Forestry · AppropriationsFiled this one in 20dbought$8K
Committee overlap is a fact, not an accusation. An option leg behind a share buy reads very differently from a plain purchase, so it is called out but never scored as intent.
The boardroom
Scheduled 10b5-1 sales are usually noise, set on autopilot months ago. The unscheduled ones are the tell.
Brown Michael JonEVP Chief Legal Compliance OffScheduled · 10b5-1
Heller Bridgette PDirectorScheduled · 10b5-1
AUGUSTINOS NICHOLASDirectorUnscheduled
FOLETTA MARK GDirectorScheduled · 10b5-1
FOLETTA MARK GDirectorScheduled · 10b5-1
SAYER KEVIN RExecutive Chair, DirectorScheduled · 10b5-1
Brown Michael JonEVP Chief Legal Compliance OffScheduled · 10b5-1
SAYER KEVIN RExecutive Chair, DirectorScheduled · 10b5-1
Brown Michael JonEVP Chief Legal Compliance OffScheduled · 10b5-1
FOLETTA MARK GDirectorScheduled · 10b5-1
FOLETTA MARK GDirectorScheduled · 10b5-1
Coleman JonEVP, Chief Commercial OfficerScheduled · 10b5-1
Coleman JonEVP, Chief Commercial OfficerScheduled · 10b5-1
Ashley Euan A.DirectorUnscheduled
Collins Richard AlexanderDirectorUnscheduled
GALA RENEE DDirectorUnscheduled
AUGUSTINOS NICHOLASDirectorUnscheduled
FOLETTA MARK GDirectorUnscheduled
Heller Bridgette PDirectorUnscheduled
Osterloh Albert Frederick IVDirectorUnscheduled
Driscoll RimmaDirectorUnscheduled
Malady KyleDirectorUnscheduled
ALTMAN STEVEN RDirectorUnscheduled
Sylvain Jereme MEVP, Chief Financal OfficerUnscheduled
Coleman JonEVP, Chief Commercial OfficerUnscheduled
Leach Jacob StevenPresident, CEO, and Director, DirectorUnscheduled
Brown Michael JonEVP Chief Legal Compliance OffUnscheduled
Stern SadieEVP Chief People & Culture OffUnscheduled
SAYER KEVIN RExecutive Chair, DirectorScheduled · 10b5-1
Brown Michael JonEVP, Chief Legal OfficerScheduled · 10b5-1
Heller Bridgette PDirectorScheduled · 10b5-1
AUGUSTINOS NICHOLASDirectorUnscheduled
ALTMAN STEVEN RDirectorUnscheduled
FOLETTA MARK GDirectorUnscheduled
ALTMAN STEVEN RDirectorUnscheduled
FOLETTA MARK GDirectorUnscheduled
Collins Richard AlexanderDirectorUnscheduled
Collins Richard AlexanderDirectorUnscheduled
AUGUSTINOS NICHOLASDirectorUnscheduled
Brown Michael JonEVP, Chief Legal OfficerScheduled · 10b5-1
The forward book
Every disclosed option leg on this ticker: what was filed, and where the strike sits versus today.
No disclosed option legs on DXCM yet. They plot here the day they file.
A call and a put are shown as filed. We do not infer whether a leg is a hedge or a leveraged bet, because the filing does not say. Read the strike and expiry, not an implied intent.
The fund book
Tracked 13F holders and how their position moved, quarter over quarter.
13F fund positions on DXCM light up when fund ingestion lands. Quarter-end marks, up to 45 days lagged, never live holdings.
Cross-check
When different sources file on the same name inside a window. Overlap like this is rare.
No convergence: DXCM is not showing congress and insider filings together in the last 90 days.
Sources file on different clocks; an overlap like this is rare.
⚠️ Public information, sourced from STOCK Act, Form 4 and 13F filings. Ranges use midpoints. Price paths between a trade and its filing are market moves, not anyone’s return. Not financial advice.