If you have ever wondered what is the Nasdaq 100, the short answer is that it tracks the 100 largest non-financial companies listed on the Nasdaq exchange. It is one of the most followed benchmarks in the world and has become shorthand for "big US technology and growth stocks."
This guide has the Nasdaq 100 explained from the ground up: what it holds, how it differs from the S&P 500, why it leans so heavily on tech, and how everyday investors get exposure to it.
What the Nasdaq-100 Is
The Nasdaq-100 launched in 1985 and is market-capitalization-weighted. Bigger companies take up more space, so a move in a trillion-dollar name matters far more than a smaller one. The index re-ranks its members every December and rebalances yearly.
Two features define it. First, it excludes financial companies entirely, so you will not find big banks or insurers inside it. Second, it pulls only from Nasdaq-listed companies, a pool that has historically attracted technology and innovation-driven listings.
The result is a concentrated, growth-tilted snapshot of the largest non-financial names, dominated by brands such as Apple stock and Microsoft stock.
S&P 500 vs Nasdaq-100
People often treat these indexes as interchangeable, but they are built differently. The S&P 500 spans 500 companies across every sector, including financials, for a broad picture of the US economy. The Nasdaq-100 is narrower, growthier, and tech-forward.
Where they overlap
The overlap is real: roughly 85% of Nasdaq-100 companies also sit inside the S&P 500. The same mega-cap names anchor both, so the two often move in the same direction day to day.
Where they diverge
The divergence shows up in sector mix and behavior. Technology-driven sectors make up roughly 85% of the Nasdaq-100 versus about 62% of the S&P 500. According to The Motley Fool, the Nasdaq-100 outperformed the S&P 500 in most years from 2007 to 2025 but fell harder in the 2022 selloff. More growth, more volatility.
For a deeper side-by-side, our explainer on S&P 500 ETF options like VOO and SPY covers how the broad-market funds are built.
Trade US stocks from $1 with Gotrade, so you can scale into a Nasdaq-100 fund gradually instead of buying a full share at the top.
Why It's Concentrated in Tech
The tech tilt is a product of how the index is built. Because it is weighted by market value and draws from a Nasdaq pool full of technology names, the biggest tech companies naturally rise to the top.
The weighting math
In a market-cap index, value compounds. As the largest companies grow, they take a bigger share, and new money tracking the index buys more of them. Technology now sits near 64% of the Nasdaq-100, and the top 10 holdings alone account for close to half of the fund.
The concentration risk
This top-heaviness cuts both ways. The "Magnificent Seven" mega-caps make up roughly 48% of the Nasdaq-100, so the index's fate is tied to a small cluster of names. As The Motley Fool noted in 2026, that concentration amplifies gains in good years and drawdowns when leadership narrows. A stumble at NVIDIA stock can move the whole index more than one company would in a broader benchmark.
If you are weighing a Nasdaq-100 fund against a pure tech fund, our breakdown of QQQ versus a sector tech ETF like VGT shows how the holdings differ.
How to Invest via QQQ and Alternatives
The most direct way to own the index is an exchange-traded fund that tracks it. The best-known is the Invesco QQQ Trust, the flagship Nasdaq-100 vehicle for over two decades and heavily traded by institutions and active investors.
QQQ versus QQQM
Invesco also runs QQQM, a newer fund tracking the same index with the same holdings. The difference is cost and liquidity: QQQ carries a 0.18% expense ratio with enormous trading volume, while QQQM charges 0.15% and targets buy-and-hold investors. For a long-term holder, the cheaper option adds up.
Other ways in
Some investors prefer to own the underlying giants directly, or pair a Nasdaq-100 fund with a broad-market fund to dilute the tech weighting. If you are still deciding on a fund structure, our guide on choosing between an ETF and an index fund covers the tradeoffs.
Conclusion
The Nasdaq-100 is a market-cap-weighted index of the 100 largest non-financial Nasdaq companies, and its exclusion of financials plus a Nasdaq-heavy listing pool is what makes it so technology-forward. It has rewarded long-term holders with strong returns, packaged with real concentration risk in a handful of mega-caps.
Understanding that tradeoff is the point. If you are comfortable with a growth-tilted, top-heavy index, a fund like QQQ or QQQM gives you the entire basket in one ticker. If you want less concentration, broader exposure or owning select names directly are reasonable alternatives.
Trade with fractional shares on Gotrade so you can build a Nasdaq-100 position one dollar at a time and size your exposure to match your own risk tolerance.
FAQ
What companies are in the Nasdaq-100?
It holds the 100 largest non-financial companies on the Nasdaq, led by mega-cap technology names such as Apple, Microsoft, and NVIDIA.
Is the Nasdaq-100 the same as the S&P 500?
No, the S&P 500 covers 500 companies across all sectors including financials, while the Nasdaq-100 is a narrower, tech-heavy group of 100 non-financial Nasdaq names.
What is the best ETF to track the Nasdaq-100?
QQQ is the most heavily traded option while QQQM tracks the same index at a slightly lower cost for long-term buy-and-hold investors.
Why is the Nasdaq-100 considered risky?
Its market-cap weighting concentrates roughly half the index in a small group of mega-cap tech stocks, which magnifies both gains and losses.
