Microsoft’s IPO turns 40 today. If you invested $1,000 in Microsoft in 1986, you’d have $5.5 million today

In January 1975, Bill Gates and Paul Allen spotted the Altair 8800 personal computer on the front of Popular Electronics and saw something most people didn’t: a machine desperately in need of software. That realization became Microsoft, a portmanteau of “microprocessors” and “software,” sometimes hyphenated in its earliest days as “Micro-Soft.” What started as a two-person operation in Albuquerque, New Mexico would, over the next five decades, reshape how the entire world not only works, but communicates, plays, and builds.

Now, 40 years to the day since the company went public in 1986, many investors are riding on a high never-before-envisioned for a simple concept that came from that magazine cover decades earlier. 

How Microsoft took the world by storm

Microsoft’s foundational years were built on a single insight: Personal computers were coming for everyone, and they would all need software. In 1981, IBM introduced its landmark personal computer bundled with a suite of Microsoft products. That deal didn’t just put Microsoft on the map—it made the company the invisible infrastructure of the entire PC industry. While IBM made the hardware that sat on your desk, Microsoft quietly owned the language that made it run.

In November 1985, the company launched Windows, a graphical operating environment layered on top of its operating system MS-DOS, which is primitive by modern standards, but radical for its time. The same year, Microsoft debuted its first retail version of the Excel that would eventually become the backbone of financial work across the globe.

The (5.5) million dollar investment

Exactly 40 years ago today, Microsoft made its debut on March 13, 1989, on the Nasdaq stock exchange at $21 per share. By the end of that first trading day, shares had surged to $35.50. The offering raised growth capital, rewarded early employees, and gave everyday investors the chance to buy into the future of computing. But most of them had no idea what they were actually holding.

A $1,000 investment at the IPO price of $21 per share would have purchased approximately 47 shares. That number seems modest, but what happened next was anything but.

If you held for all four decades, that simple $1,000 investment would have turned into $5.5 million today, all thanks to a few splits that kept the share price accessible to investors and increased the number of shares people owned. 

Over the following four decades, Microsoft executed nine stock splits, which would have turned those 47 shares into approximately 13,700 shares. And with Microsoft trading around $400 per share by today, a $1,000 investment made on IPO day would be worth approximately $5.5 million.

In addition to the splits, the return is almost double the market average. That represents an annualized total return of roughly 21.8% compounded over the life of the stock—compared to the S&P 500’s historical annualized return of approximately 10.8% over the same period. It is one of the greatest long-term wealth creation stories in stock market history.

And the appreciation alone doesn’t capture the full picture. Microsoft initiated a quarterly dividend in 2003, meaning a buy-and-hold investor would have collected an additional $341,513 in dividends on top of their principal gains by 2022. Today, that same investor would be collecting roughly $36,000 per year in dividend income—36 times their original investment, simply in annual cash payments.

The ride did require some nerve. After the dot-com bubble burst and Microsoft’s final stock split in 2003, shares entered a long holding pattern that lasted nearly a decade. An investor who sold during those flat years would have walked away with around $288,000—less than 7% of what never-sell investors would come to hold. The lesson was brutal and simple: The people who won biggest were the ones who never touched the sell button.

A $3 trillion company

Microsoft’s modern-day scale is almost incomprehensible when measured against the $197 million annual revenue the company generated around the time of its IPO. In its second quarter of the fiscal year 2026, which ended on Dec. 31, 2025, Microsoft reported revenue of $81.3 billion—a 17% year-over-year increase. Operating income reached $38.3 billion, up 21%, and net income hit $38.5 billion .

Microsoft returned $12.7 billion to shareholders in Q2 FY2026 through dividends and share buybacks, up 32% from the same period a year earlier. Microsoft CEO Satya Nadella, reflecting on the company’s AI momentum, said: “We are only at the beginning phases of AI diffusion and already Microsoft has built an AI business that is larger than some of our biggest franchises.”

Forty years ago, a $1,000 check written for a scrappy software company would be worth roughly $5.5 million today.