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Tandem Diabetes Care (TNDM) stock

Market cap $1.1B

$16.52
+0.12%

Market closed. Prices as of Monday's close.

Quality Score
-3
Poor
In its industry
#78of 84
Medical Devices

TNDM's Quality Score was unchanged on Mon, Oct 5, at -3.

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Why TNDM lags the market

Tandem Diabetes Care returned -86% over five years to the S&P 500's +91%; its operating margin went from -1.6% to -18.5%.

Diluted EPS went from -$0.56 in fiscal 2020 to -$3.04 in fiscal 2025.

Sources: Price history, Oct 5, 2026; Annual reports, Dec 31, 2025; Peers' annual reports, Oct 5, 2026

2 more drivers, the timeline, and the peer table, for Pro members

Why TNDM scores -3

PoorTrending down, 0 of 14 checks firingWhat the Quality Score means

Poor is below 0. Average starts at 6, Above Average at 11, Excellent at 15, and Exceptional at 20.

  • −2Long-term trend below a falling 200-⁠day average, down over two years
  • +1Growth sales up 4% on the year, gross margin up 3.5 pointsSales and margins against a year earlier: up to +3 for fast growth and widening margins, down to -2 when both shrink.
  • Volatility subtractsA daily range of 5% or more with nothing behind it (no profit or cash flow, sales shrinking, or 10% more shares outstanding with no free cash flow): -1, or -2 from 8%.
  • Cash flow subtracts-1 when free cash flow over the last four quarters is negative.

No effect today: Chart checks, Run-up, Size, Profit, Dilution, Persistence, and News.

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Price, score, chart checks, and the industry rank are from a snapshot taken at 2:09 AM ET, at least 15 minutes behind. How we rank stocks.

What's next

Reports Thu Nov 5, after the close

After its last 4 reports it closed +14.4% on average, higher 3 of 4 times.

What would turn TNDM's score around: 8 things, for Pro members

Alert me when TNDM's Quality Score turns up

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Nothing is firing on TNDM right now

One per group is shown here.

Trend1 of 5 shown
MA FAN21 EMAW.EMAHH/HL52W HI

Averages stacked in order, price near its high.

Volume1 of 3 shown
VOLVDUU/D VOL

Heavy volume on the run, quiet volume at rest.

Tight range1 of 3 shown
ATR SQZSQUEEZENR7

The daily range is tight against its own recent history.

Buying1 of 3 shown
OBV+CLOSE HISPRING

Closes near the high, and buyers step in on dips.

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Also on the chart

Not scored

Shown for reference. None of these counts toward the Quality Score: in our tests on 20 years of daily prices, none of them improved it.

  • RSI 1440.4

    Above 30, below 50.

  • MACD (12, 26, 9)Above signal

    Crossed above its signal line 1 session ago.

  • 50-day average$19.51

    The price is 15.3% below it.

  • 200-day average$19.41

    The price is 14.9% below it. The 50-day is above the 200-day, since Sep 23.

  • ADX 1423.7

    Under 25, with +DI below -DI.

  • Support$14.83

    Swing low from Sep 25, 10.2% below the price.

  • Resistance$18.03

    Swing high from Sep 22, 9.1% above the price.

  • Bollinger Bands (20, 2)Inside

    The bands run from $14.88 to $19.16.

  • Volume0.8x

    Against its 20-day average, for the time of day.

How TNDM ranks in Medical Devices

TNDM is #78 of 84 by Quality Score. The top three are shown with their scores, and more by name.

More in Medical Devices, on the Healthcare page

When does TNDM report earnings, and what happens after?

Reports Thu Nov 5, after the close (in 30 days). The company has set the date.

ReportedGapReaction5 sessions
Aug 6, 2026After close-7.5%+19.1%+23.1%
May 7, 2026After close+8.3%-16.2%-23.4%
Feb 19, 2026After close+22.8%+32.7%+39.3%
Nov 6, 2025After close+20.0%+22.0%+31.5%

The gap is the next open against the close before the report; the reaction is where that session closed. TNDM closed higher after 3 of its last 4. Past behavior, not a forecast.

Report dates and past reactions come from sessions that have already closed, so none of these figures move.

Who is trading TNDM

TNDM trades by Congress and the White House

2 trades disclosed in the last six months. The newest:

SellDonald Trump$15K to $50KPresident (R)traded Jul 29, disclosed Sep 22(55 days later)
All 2 trades on TNDM disclosed by Congress and the White House, for Pro members.Get in free →

Congress gets 45 days to report a trade, so the two dates are weeks apart. Shown as filed, with no delay.

See what Congress is buying across the market

About Tandem Diabetes Care

Tandem Diabetes designs, manufactures, and markets durable insulin pumps for individuals with diabetes. The firm first entered this market in 2012 and has since introduced multiple generations of pumps leading to its current t:slim X2 device. The firm recently launched its smaller Mobi pump and continues to work on the Sigi tubeless patch pump. Tandem is also developing a fully closed-loop algorithm for its pumps. Nearly three-quarters of total revenue is derived from the US, with the remainder primarily from other developed nations. The pumps themselves generate just over half of total sales, and another one-third is from disposable infusion sets that need to be changed over every 3 to 7 days.

2,500 employeesSan Diego, CAtandemdiabetes.com

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  • Every filing, and optional alerts on TNDM
BreakawaySep 22Donald Trump sold TNDM$15K to $50K, disclosed Sep 22

What a filing on TNDM would have sent. Alerts are optional.

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The price, the score, the chart checks and readings, and the industry rank on this page are delayed at least 15 minutes. Filings are shown as filed, because a disclosure is already days or weeks old when it becomes public. Earnings dates and past reactions are settled sessions.