What if you'd held GNTX?
A $1,000 investment in Gentex Corporation (GNTX) at the month-end close of 1981-12 would be worth $408,290 at the close of 2026-08 — +40729.0% total return, dividends reinvested. The same $1,000 in the S&P 500 would be worth $62,897.
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 1981
| Year | Value of $1,000 | Year return |
|---|---|---|
| 1981 | $1,000 | — |
| 1982 | $876 | -12.4% |
| 1983 | $1,064 | +21.5% |
| 1984 | $667 | -37.3% |
| 1985 | $1,168 | +75.1% |
| 1986 | $1,147 | -1.8% |
| 1987 | $1,168 | +1.8% |
| 1988 | $1,710 | +46.4% |
| 1989 | $4,252 | +148.7% |
| 1990 | $1,751 | -58.8% |
| 1991 | $4,337 | +147.6% |
| 1992 | $7,088 | +63.4% |
| 1993 | $23,516 | +231.8% |
| 1994 | $16,178 | -31.2% |
| 1995 | $14,677 | -9.3% |
| 1996 | $26,851 | +82.9% |
| 1997 | $35,858 | +33.5% |
| 1998 | $53,370 | +48.8% |
| 1999 | $74,052 | +38.8% |
| 2000 | $49,701 | -32.9% |
| 2001 | $71,330 | +43.5% |
| 2002 | $84,432 | +18.4% |
| 2003 | $118,351 | +40.2% |
| 2004 | $100,772 | -14.9% |
| 2005 | $108,884 | +8.1% |
| 2006 | $88,926 | -18.3% |
| 2007 | $103,781 | +16.7% |
| 2008 | $53,071 | -48.9% |
| 2009 | $111,547 | +110.2% |
| 2010 | $189,074 | +69.5% |
| 2011 | $192,380 | +1.7% |
| 2012 | $125,382 | -34.8% |
| 2013 | $225,010 | +79.5% |
| 2014 | $251,456 | +11.8% |
| 2015 | $227,250 | -9.6% |
| 2016 | $285,706 | +25.7% |
| 2017 | $309,827 | +8.4% |
| 2018 | $304,732 | -1.6% |
| 2019 | $445,808 | +46.3% |
| 2020 | $531,520 | +19.2% |
| 2021 | $553,594 | +4.2% |
| 2022 | $440,537 | -20.4% |
| 2023 | $536,382 | +21.8% |
| 2024 | $478,933 | -10.7% |
| 2025 | $395,698 | -17.4% |
| 2026 | $408,290 | +3.2% |
Best and worst month-end to buy
The best single month-end close to have bought GNTX was 1982-05 ($0.02): $1,000 then is $1.22M today. The worst was 2024-02 ($34.87): $1,000 then is $678.
FAQ
What would $1,000 in GNTX be worth today?
A $1,000 investment in Gentex Corporation (GNTX) at the start of 1981 would be worth about $408,290 today, a total return of +40729.0%. Dividends are reinvested in these figures.
What were the best and worst years for GNTX?
Gentex Corporation (GNTX)'s strongest calendar year since 1981 was 1993, a +231.8% return — $1,000 held through that year became about $3,318 by year-end. Its weakest year was 1990, at -58.8%.
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 GNTX have grown?
Investing $100 at the end of every month since 1981-12 would have grown to about $4.49M on $53,700 invested.
Did GNTX beat the S&P 500?
Over the same period, $1,000 in the S&P 500 index would be worth $62,897. GNTX beat the S&P 500 by +549.1% 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
Gentex Corporation (GNTX) historical total-return data from 1981-12 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. 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.