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Tandem Diabetes Care Inc (TNDM)

Tandem Diabetes Care Inc brought in $1.1B of revenue over the twelve months to September 30, 2026, up 6.8% from a year earlier. It posted a net loss of $49.2M. In fiscal 2025 capital spending exceeded operating cash flow by $29.7M. At September 30, 2026 it held $72.8M in cash against $603.4M of debt. Its latest periodic report to the SEC is the quarterly report (10-Q) filed on November 5, 2026.

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Price
$18.17
+7.45% on the day · November 9, 2026
52-week range $12.26 to $29.65
Market cap
$1.3B
Revenue (last 12 months)
$1.1B
+6.8% year on year
Net margin
-4.6%

Key facts about Tandem Diabetes Care Inc

Net worth
Tandem Diabetes Care Inc has a market value (market cap) of $1.3B at the latest share price, and shareholders' equity of $135.1M on its balance sheet at September 30, 2026. A company's "net worth" usually means one of these: what the market pays for all its shares, or its assets minus its liabilities.
Revenue and profit
In fiscal 2025 revenue was $1B (+7.9% year on year), with a net loss of $204.7M. Over the 12 months to September 30, 2026: revenue $1.1B, net loss $49.2M.
Cash flow
In fiscal 2025 operations used $9.7M of cash.
Latest report
The latest periodic report (quarterly report, 10-Q) was filed with the SEC on November 5, 2026 and covers the period to September 30, 2026. Open on SEC EDGAR
Next earnings report
Tandem Diabetes Care Inc's next report is expected around February 18, 2027. That is an estimate from its filing rhythm, not a date the company has announced.

What Tandem Diabetes Care Inc does

Tandem Diabetes Care Inc is registered with the SEC under industry code SIC 3841 (Surgical & Medical Instruments & Apparatus). Its shares trade on NASDAQ under the ticker TNDM.

Revenue and profit by year

Revenue
FY18: $183.9M $183.9M FY18FY19: $362.3M $362.3M FY19FY20: $498.8M $498.8M FY20FY21: $702.8M $702.8M FY21FY22: $801.2M $801.2M FY22FY23: $747.7M $747.7M FY23FY24: $940.2M $940.2M FY24FY25: $1B $1B FY25
Net income
FY18: -$122.6M -$122.6M FY18FY19: -$24.8M -$24.8M FY19FY20: -$34.4M -$34.4M FY20FY21: $15.6M $15.6M FY21FY22: -$94.6M -$94.6M FY22FY23: -$222.6M -$222.6M FY23FY24: -$96M -$96M FY24FY25: -$204.7M -$204.7M FY25

Fiscal years as reported in annual reports. Amounts in USD.

Key figures

Fiscal yearRevenueOperating incomeNet incomeDiluted EPSFree cash flow
2025$1B-$187.3M-$204.7M-$3.04-$29.7M
2024$940.2M-$99.1M-$96M-$1.47$5M
2023$747.7M-$233.2M-$222.6M-$3.43-$58.6M
2022$801.2M-$92.8M-$94.6M-$1.47$16.4M
2021$702.8M$22.7M$15.6M$0.24$97.2M
2020$498.8M-$8M-$34.4M-$0.56-$2.7M

Earnings: every quarter and the next report date

Full financial statements: income, balance sheet and cash flow

Next report expected around February 18, 2027.

Estimated from its filing rhythm: 52 weeks after its report of February 19, 2026. Not a date the company has announced. See the report calendar · Earnings, quarter by quarter

Where TNDM ranks in Health care

Revenue$1B
#152 of 751 in Health care · Top 20%
Revenue growth+7.9%
#314 of 532 in Health care · Bottom 41%
Net margin-20.2%
#323 of 544 in Health care · Bottom 41%
Free cash flow margin-2.9%
#260 of 490 in Health care · Bottom 47%

Latest fiscal year of every company in the sector with the figure reported. Revenue is ranked among companies reporting in US dollars; growth and margins among companies with at least 10 million of revenue. Health care

Latest SEC filings

What Tandem Diabetes Care Inc has filed recently, newest first. Each links to the original document on SEC EDGAR.

  1. November 9, 2026
  2. November 5, 2026
    Quarterly report 10-Q · period to September 30, 2026Revenue rose 14% to $283.7M versus the same quarter last year; diluted EPS -$0.10 versus -$0.31.
  3. November 5, 2026
  4. August 6, 2026
    Quarterly report 10-Q · period to June 30, 2026Revenue rose 5.8% to $254.6M versus the same quarter last year; diluted EPS -$0.31 versus -$0.78.
  5. August 6, 2026
  6. May 28, 2026
  7. May 27, 2026
  8. May 21, 2026
  9. May 15, 2026
  10. May 7, 2026
    Quarterly report 10-Q · period to March 31, 2026Revenue rose 5.5% to $247.2M versus the same quarter last year; diluted EPS -$0.30 versus -$1.97.

Recent insider filings (Forms 3, 4 and 144): 10, the latest on October 29, 2026. Insider transactions on SEC

Insider trades

What the people running Tandem Diabetes Care Inc did with its shares, from the Form 4 filings they must send the SEC within two business days.

Insiders sold $32.6K worth of shares in the last 90 days and bought none on the open market. All of the selling was pre-planned under Rule 10b5-1 trading plans.

Bought (open market)
$0
last 90 days
Sold
$32.6K
last 90 days
Net sold
1,700
$32.6K
DateInsiderWhatSharesPriceValueFiling
October 27, 2026 Twomey Christopher JDirector Exercised options 1,700 $19.00 $32.3K Form 4
October 27, 2026 Twomey Christopher JDirector Soldpre-planned (10b5-1) 1,700 $19.15 $32.6K Form 4
October 15, 2026 Kyrillos Jean-ClaudeEVP & Chief Operating Officer Exercised options 3,637 - - Form 4
October 15, 2026 Kyrillos Jean-ClaudeEVP & Chief Operating Officer Shares withheld for tax 1,926 $16.52 $31.8K Form 4
August 15, 2026 Hansen Shannon MarieEVP & Chief Legal Officer Exercised options 1,097 - - Form 4
August 15, 2026 Hansen Shannon MarieEVP & Chief Legal Officer Shares withheld for tax 559 $22.72 $12.7K Form 4
August 15, 2026 Hansen Shannon MarieEVP & Chief Legal Officer Exercised options 1,917 - - Form 4
August 15, 2026 Hansen Shannon MarieEVP & Chief Legal Officer Shares withheld for tax 976 $22.72 $22.2K Form 4

All insider filings on SEC.gov · Where insiders are buying across the market

Who owns TNDM

Three views from three kinds of SEC filings, each with its own date. They overlap and are not added up.

5% holders

Anyone who owns more than 5% of a class of shares must say so on Schedule 13D (if they may seek to influence the company) or 13G (a passive holder). The latest filing of each holder is shown: 13G filings of the last 2 years, 13D of the last 3.

HolderOf classSharesFiled
Sessa Capital (Master), L.P.13G, passive with 4 related filers 6.71% 4,466,307 May 15, 2025
Vanguard Portfolio Management13G, passive 5.91% 4,052,274 April 29, 2026
The Goldman Sachs Group, Inc.13G, passive with 1 related filers 5.9% 4,091,935 November 9, 2026
Vanguard Capital Management13G, passive 5.18% 3,553,772 April 30, 2026

Latest filings below 5%: The Vanguard Group 0% (March 27, 2026); ArrowMark Colorado Holdings, LLC 4.26% (February 17, 2026).

Largest institutional holders

No Form 13F positions imported for this company yet.

Insiders

Reported holdings of insiders who filed a Form 4 in the last 12 months: the shares each one held after their latest reported transaction. This is not the total held by all insiders.

16 insiders reported holding 636,475 shares in total, about $11.6M at the last price.

HolderSharesAs of
Sheridan John FPRESIDENT & CEO, Director 160,260 August 15, 2026
Morrison SusanEVP & Chief Admin. Officer 52,788 August 15, 2026
Vosseller LeighEVP & CHIEF FINANCIAL OFFICER 52,040 August 15, 2026
Novara Mark DavidEVP & CHIEF COMMERCIAL OFFICER 40,317 May 15, 2026
Gasser Elizabeth AnneEVP, Chief Strategy Officer 34,50533,109 held indirectly August 15, 2026
Carpenter RickEVP & Chief Technology Officer 32,148 August 15, 2026
Kyrillos Jean-ClaudeEVP & Chief Operating Officer 32,001 October 15, 2026
Hansen Shannon MarieEVP & Chief Legal Officer 31,650 August 15, 2026
Howell Peyton RDirector 29,836 May 21, 2026
Allen DickChair Emeritus 28,146 May 21, 2026

Schedule 13D/13G filings on SEC.gov

All filings on SEC EDGAR

Questions about TNDM

What does Tandem Diabetes Care Inc do?

Tandem Diabetes Care Inc is a company in the Health care sector, listed on NASDAQ as TNDM. Its shares trade on NASDAQ under the ticker TNDM.

What is Tandem Diabetes Care Inc's net worth?

Tandem Diabetes Care Inc has a market value (market cap) of $1.3B at the latest share price, and shareholders' equity of $135.1M on its balance sheet at September 30, 2026. A company's "net worth" usually means one of these: what the market pays for all its shares, or its assets minus its liabilities.

Is Tandem Diabetes Care Inc profitable?

No. Over the twelve months to September 30, 2026 it reported a net loss of $49.2M on revenue of $1.1B.

How much revenue does Tandem Diabetes Care Inc make?

Over the twelve months to September 30, 2026 Tandem Diabetes Care Inc reported revenue of $1.1B. That is 6.8% more than a year earlier.

When did Tandem Diabetes Care Inc last report?

Its most recent periodic report is the quarterly report (10-Q) filed on November 5, 2026. It covers the period to September 30, 2026. Its newest filing of any kind is the passive stake (5% or more) from November 9, 2026.

When is Tandem Diabetes Care Inc's next earnings report?

Tandem Diabetes Care Inc's next report is expected around February 18, 2027. That is an estimate from its filing rhythm, not a date the company has announced.

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Where the numbers come from

Financial figures are the values Tandem Diabetes Care Inc tagged in its own SEC filings (XBRL), taken from the latest filing for each period, so restatements replace older figures. Revenue, profit and cash flow are for full fiscal years unless marked as the last twelve months, which is the sum of the four most recent quarters. Where a company reports only the full year, the fourth quarter is the year minus the first three.

Prices are delayed end-of-day market data in the listing currency, and market cap moves with the price. P/E is shown only when earnings per share are positive. Nothing here is investment advice.