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Stock brief · the live tape
TNDMTandem Diabetes Care, Inc.
Health Care
$21.43
▲ $2.84 (+15.3%) · 30dclose Friday, August 28, 2026
Disclosed flow is one-sided toward buying.
2 members · 4 disclosed trades · 149 insider filings
The Hill
▲ 3▼ 1
3 buys · 1 sellsThe Boardroom
▲ 68▼ 81
68 buys · 81 sells · 149 filingsFeeding Time13F lens lands with fund ingestion
What is behind it
Recent Signal Scores, decayed50
Events counted, 90d51
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.
Cisneros-9.7+17.2
Gottheimer+64.1+45.3
Gottheimer+3.9+25.8
Cisneros+9.9+27.2
Median copy kept +26.5% from the filing vs +6.9% from the trade date; the lag took -19.6 pts. The S&P returned +31.8% 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.
Gilbert Ray Cisneros, Jr.House · Armed Services · Small BusinessFiled this one in 35dbought$16KJosh GottheimerHouse · Intelligence · Financial ServicesFiled this one in 23dmixed$16K
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.
Hansen Shannon MarieEVP & Chief Legal OfficerUnscheduled
Hansen Shannon MarieEVP & Chief Legal OfficerUnscheduled
Hansen Shannon MarieEVP & Chief Legal OfficerUnscheduled
Hansen Shannon MarieEVP & Chief Legal OfficerUnscheduled
Hansen Shannon MarieEVP & Chief Legal OfficerUnscheduled
Hansen Shannon MarieEVP & Chief Legal OfficerUnscheduled
Carpenter RickEVP & Chief Technology OfficerUnscheduled
Carpenter RickEVP & Chief Technology OfficerUnscheduled
Carpenter RickEVP & Chief Technology OfficerUnscheduled
Carpenter RickEVP & Chief Technology OfficerUnscheduled
Gasser Elizabeth AnneEVP, Chief Strategy OfficerUnscheduled
Kyrillos Jean-ClaudeEVP & Chief Operating OfficerUnscheduled
Gasser Elizabeth AnneEVP, Chief Strategy OfficerUnscheduled
Gasser Elizabeth AnneEVP, Chief Strategy OfficerUnscheduled
Carpenter RickEVP & Chief Technology OfficerUnscheduled
Morrison SusanEVP & Chief Admin. OfficerUnscheduled
Carpenter RickEVP & Chief Technology OfficerUnscheduled
Sheridan John FPRESIDENT & CEO, DirectorUnscheduled
Morrison SusanEVP & Chief Admin. OfficerUnscheduled
Morrison SusanEVP & Chief Admin. OfficerUnscheduled
Morrison SusanEVP & Chief Admin. OfficerUnscheduled
Vosseller LeighEVP & CHIEF FINANCIAL OFFICERUnscheduled
Sheridan John FPRESIDENT & CEO, DirectorUnscheduled
Sheridan John FPRESIDENT & CEO, DirectorUnscheduled
Kyrillos Jean-ClaudeEVP & Chief Operating OfficerUnscheduled
Morrison SusanEVP & Chief Admin. OfficerUnscheduled
Kyrillos Jean-ClaudeEVP & Chief Operating OfficerUnscheduled
Sheridan John FPRESIDENT & CEO, DirectorUnscheduled
Gasser Elizabeth AnneEVP, Chief Strategy OfficerUnscheduled
Gasser Elizabeth AnneEVP, Chief Strategy OfficerUnscheduled
Vosseller LeighEVP & CHIEF FINANCIAL OFFICERUnscheduled
Vosseller LeighEVP & CHIEF FINANCIAL OFFICERUnscheduled
Vosseller LeighEVP & CHIEF FINANCIAL OFFICERUnscheduled
Morrison SusanEVP & Chief Admin. OfficerUnscheduled
Vosseller LeighEVP & CHIEF FINANCIAL OFFICERUnscheduled
Gasser Elizabeth AnneEVP, Chief Strategy OfficerUnscheduled
Sheridan John FPRESIDENT & CEO, DirectorUnscheduled
Sheridan John FPRESIDENT & CEO, DirectorUnscheduled
Vosseller LeighEVP & CHIEF FINANCIAL OFFICERUnscheduled
Kyrillos Jean-ClaudeEVP & Chief Operating OfficerUnscheduled
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 TNDM 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 TNDM 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: TNDM 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.