What if you'd held AJG?
A $1,000 investment in Arthur J. Gallagher & Co. (AJG) at the month-end close of 1984-06 would be worth $419,300 at the close of 2026-08 — +41830.0% total return, dividends reinvested. The same $1,000 in the S&P 500 would be worth $50,320.
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 1984
| Year | Value of $1,000 | Year return |
|---|---|---|
| 1984 | $1,000 | — |
| 1985 | $1,622 | +62.2% |
| 1986 | $1,765 | +8.8% |
| 1987 | $1,168 | -33.8% |
| 1988 | $1,134 | -2.9% |
| 1989 | $1,710 | +50.8% |
| 1990 | $1,657 | -3.1% |
| 1991 | $1,640 | -1.0% |
| 1992 | $2,126 | +29.6% |
| 1993 | $2,789 | +31.2% |
| 1994 | $2,533 | -9.2% |
| 1995 | $3,032 | +19.7% |
| 1996 | $2,613 | -13.8% |
| 1997 | $3,009 | +15.1% |
| 1998 | $3,979 | +32.3% |
| 1999 | $6,020 | +51.3% |
| 2000 | $12,083 | +100.7% |
| 2001 | $13,331 | +10.3% |
| 2002 | $11,583 | -13.1% |
| 2003 | $13,141 | +13.4% |
| 2004 | $13,565 | +3.2% |
| 2005 | $13,397 | -1.2% |
| 2006 | $13,395 | -0.0% |
| 2007 | $11,468 | -14.4% |
| 2008 | $12,921 | +12.7% |
| 2009 | $11,913 | -7.8% |
| 2010 | $16,155 | +35.6% |
| 2011 | $19,427 | +20.3% |
| 2012 | $20,912 | +7.6% |
| 2013 | $29,268 | +40.0% |
| 2014 | $30,284 | +3.5% |
| 2015 | $27,214 | -10.1% |
| 2016 | $35,678 | +31.1% |
| 2017 | $44,612 | +25.0% |
| 2018 | $53,171 | +19.2% |
| 2019 | $70,071 | +31.8% |
| 2020 | $92,581 | +32.1% |
| 2021 | $128,703 | +39.0% |
| 2022 | $144,711 | +12.4% |
| 2023 | $174,393 | +20.5% |
| 2024 | $222,079 | +27.3% |
| 2025 | $204,245 | -8.0% |
| 2026 | $204,488 | +0.1% |
Best and worst month-end to buy
The best single month-end close to have bought AJG was 1984-06 ($0.61): $1,000 then is $419,300 today. The worst was 2025-05 ($343): $1,000 then is $751.
FAQ
What would $1,000 in AJG be worth today?
A $1,000 investment in Arthur J. Gallagher & Co. (AJG) at the start of 1984 would be worth about $419,300 today, a total return of +41830.0%. Dividends are reinvested in these figures.
What were the best and worst years for AJG?
Arthur J. Gallagher & Co. (AJG)'s strongest calendar year since 1984 was 2000, a +100.7% return — $1,000 held through that year became about $2,007 by year-end. Its weakest year was 1987, at -33.8%.
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 AJG have grown?
Investing $100 at the end of every month since 1984-06 would have grown to about $2.43M on $50,700 invested.
Did AJG beat the S&P 500?
Over the same period, $1,000 in the S&P 500 index would be worth $50,320. AJG beat the S&P 500 by +733.3% 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
Arthur J. Gallagher & Co. (AJG) historical total-return data from 1984-06 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. 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.