Tandem Diabetes Care Inc (TNDM) returns
Tandem Diabetes Care returns over 10 years
$1,000 invested in Tandem Diabetes Care ten years ago was worth $313.28 at the close on October 30, 2026, with dividends reinvested: an average return of -11.0% a year. The same $1,000 in the S&P 500 (SPY) became $4,166.
Total return by period
| Period | Total return | A year, on average | $1,000 became | S&P 500 (SPY) |
|---|---|---|---|---|
| 1 month | +17.2% | — | $1,172 | -0.9% |
| 3 months | +0.5% | — | $1,005 | +2.1% |
| Year to date | -13.1% | — | $869.43 | +11.7% |
| 1 year | +31.0% | — | $1,310 | +12.4% |
| 3 years | +10.7% | +3.5% | $1,107 | +88.5% |
| 5 years | -86.0% | -32.5% | $140.18 | +76.0% |
| 10 years | -68.7% | -11.0% | $313.28 | +316.6% |
Tandem Diabetes Care return by calendar year
| Year | TNDM | S&P 500 (SPY) | Difference |
|---|---|---|---|
| 2026 to date | -13.1% | +11.7% | -24.7% |
| 2025 | -39.0% | +17.7% | -56.7% |
| 2024 | +21.8% | +24.9% | -3.1% |
| 2023 | -34.2% | +26.2% | -60.4% |
| 2022 | -70.1% | -18.2% | -52.0% |
| 2021 | +57.3% | +28.7% | +28.6% |
| 2020 | +60.5% | +18.4% | +42.1% |
| 2019 | +57.0% | +31.2% | +25.8% |
| 2018 | +1,509% | -4.6% | +1,513% |
| 2017 | -89.0% | +21.7% | -110.7% |
| 2016 | -81.8% | +12.0% | -93.8% |
Past returns do not predict future returns. Returns are computed from our daily closes, adjusted for splits and with dividends reinvested on their ex-dates; taxes and trading costs are left out.
See also: TNDM financials
No forecast, no recommendation. This page describes Tandem Diabetes Care Inc from published data; it is not advice to buy, sell or hold any security.
Figures as of the close on Oct 30, 2026 unless a row says otherwise. Prices are split adjusted; returns include dividends reinvested. Data may be delayed. See the disclaimer and how TrendArc works.