What if you'd held SMMT?
A $1,000 investment in Summit Therapeutics Inc. (SMMT) at the month-end close of 2015-03 would be worth $1,058 at the close of 2026-08 — +5.8% total return, dividends reinvested. The same $1,000 in the S&P 500 would be worth $3,727.
Your scenario
Result
If you'd bought $1,000 at the start of each year
Value of $1,000 invested on January 1 of each year, held to 2026-08, dividends included.
Every year, $1,000 from 2015
| Year | Value of $1,000 | Year return |
|---|---|---|
| 2015 | $1,000 | — |
| 2016 | $744 | -25.6% |
| 2017 | $963 | +29.4% |
| 2018 | $100 | -89.6% |
| 2019 | $139 | +39.1% |
| 2020 | $409 | +193.8% |
| 2021 | $234 | -42.8% |
| 2022 | $370 | +58.0% |
| 2023 | $227 | -38.6% |
| 2024 | $1,552 | +583.7% |
| 2025 | $1,521 | -2.0% |
| 2026 | $1,140 | -25.0% |
Best and worst month-end to buy
The best single month-end close to have bought SMMT was 2022-11 ($0.80): $1,000 then is $16,388 today. The worst was 2025-07 ($26.37): $1,000 then is $497.
FAQ
What would $1,000 in SMMT be worth today?
A $1,000 investment in Summit Therapeutics Inc. (SMMT) at the start of 2015 would be worth about $1,058 today, a total return of +5.8%. Dividends are reinvested in these figures.
What were the best and worst years for SMMT?
Summit Therapeutics Inc. (SMMT)'s strongest calendar year since 2015 was 2024, a +583.7% return — $1,000 held through that year became about $6,837 by year-end. Its weakest year was 2018, at -89.6%.
Does the calculator include dividends and splits?
Yes where available. Prices are adjusted for both stock splits and reinvested dividends (total return), the same measure brokerages use.
How much would $100 per month in SMMT have grown?
Investing $100 at the end of every month since 2015-03 would have grown to about $51,563 on $13,800 invested.
Did SMMT beat the S&P 500?
Over the same period, $1,000 in the S&P 500 index would be worth $3,727. SMMT trailed the S&P 500 by +71.6% in total return.
Is this investment advice?
No. Wall Street Regrets is an entertainment and education tool. Every number is a historical calculation, not a prediction, and past performance never guarantees future results.
Methodology
Summit Therapeutics Inc. (SMMT) historical total-return data from 2015-03 to 2026-08, reduced to month-end closes for the tables above.
Returns use adjusted close prices from Yahoo Finance historical data — adjusted for stock splits and reinvested dividends — the same convention used by major brokerages. A "year" scenario invests $1,000 at the prior December's month-end close and values it at the latest available month-end close. Non-USD amounts are converted at historical month-end exchange rates (Yahoo Finance): to USD on the buy date and back to your currency at the latest rate, so the return reflects the currency move as well as the asset.
Month-end resolution means intra-month extremes are not captured in tables; the calculator uses exact trading-day closes where daily data is available. Figures ignore taxes, fees, and the currency effects of non-USD listings. History is not a forecast. Wall Street Regrets is entertainment, not investment advice.
What if you'd held…
Data: adjusted close prices via Yahoo Finance. As of 2026-08. Not financial advice.