What if you'd held ATO?
A $1,000 investment in Atmos Energy Corporation (ATO) at the month-end close of 1983-12 would be worth $138,153 at the close of 2026-08 — +13715.3% total return, dividends reinvested. The same $1,000 in the S&P 500 would be worth $46,735.
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. Click any year for the full story.
Every year, $1,000 from 1983
| Year | Value of $1,000 | Year return |
|---|---|---|
| 1983 | $1,000 | — |
| 1984 | $1,185 | +18.5% |
| 1985 | $1,927 | +62.6% |
| 1986 | $1,790 | -7.1% |
| 1987 | $1,476 | -17.6% |
| 1988 | $1,960 | +32.8% |
| 1989 | $2,234 | +14.0% |
| 1990 | $2,218 | -0.7% |
| 1991 | $3,282 | +48.0% |
| 1992 | $3,556 | +8.4% |
| 1993 | $4,379 | +23.1% |
| 1994 | $4,250 | -2.9% |
| 1995 | $6,032 | +41.9% |
| 1996 | $6,532 | +8.3% |
| 1997 | $8,540 | +30.7% |
| 1998 | $9,435 | +10.5% |
| 1999 | $6,258 | -33.7% |
| 2000 | $7,927 | +26.7% |
| 2001 | $7,274 | -8.2% |
| 2002 | $8,419 | +15.7% |
| 2003 | $9,234 | +9.7% |
| 2004 | $10,903 | +18.1% |
| 2005 | $10,911 | +0.1% |
| 2006 | $13,911 | +27.5% |
| 2007 | $12,766 | -8.2% |
| 2008 | $11,339 | -11.2% |
| 2009 | $14,815 | +30.7% |
| 2010 | $16,484 | +11.3% |
| 2011 | $18,355 | +11.4% |
| 2012 | $20,145 | +9.8% |
| 2013 | $26,952 | +33.8% |
| 2014 | $34,089 | +26.5% |
| 2015 | $39,653 | +16.3% |
| 2016 | $47,766 | +20.5% |
| 2017 | $56,565 | +18.4% |
| 2018 | $62,444 | +10.4% |
| 2019 | $76,887 | +23.1% |
| 2020 | $67,105 | -12.7% |
| 2021 | $75,653 | +12.7% |
| 2022 | $82,944 | +9.6% |
| 2023 | $88,056 | +6.2% |
| 2024 | $108,621 | +23.4% |
| 2025 | $133,685 | +23.1% |
| 2026 | $138,153 | +3.3% |
Best and worst month-end to buy
The best single month-end close to have bought ATO was 1984-08 ($1.16): $1,000 then is $147,681 today. The worst was 2026-04 ($189): $1,000 then is $907.
FAQ
What would $1,000 in ATO be worth today?
A $1,000 investment in Atmos Energy Corporation (ATO) at the start of 1983 would be worth about $138,153 today, a total return of +13715.3%. Dividends are reinvested in these figures.
What were the best and worst years for ATO?
Atmos Energy Corporation (ATO)'s strongest calendar year since 1983 was 1985, a +62.6% return — $1,000 held through that year became about $1,626 by year-end. Its weakest year was 1999, at -33.7%.
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 ATO have grown?
Investing $100 at the end of every month since 1983-12 would have grown to about $1.28M on $51,300 invested.
Did ATO beat the S&P 500?
Over the same period, $1,000 in the S&P 500 index would be worth $46,735. ATO beat the S&P 500 by +195.6% in total return.
Is this investment advice?
No. What If I'd Held is an entertainment and education tool. Every number is a historical calculation, not a prediction, and past performance never guarantees future results.
Methodology
Atmos Energy Corporation (ATO) historical total-return data from 1983-12 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.
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. What If I'd Held is entertainment, not investment advice.
What if you'd held…
Data: adjusted close prices via Yahoo Finance. As of 2026-08. Not financial advice.