About MarketCapLens

Last updated: September 2026

What this site is

MarketCapLens is an independent research site that ranks U.S.-listed public companies by market capitalization. The ranking, sector pages, and company pages all read from the same daily snapshot so the figures you see in one place match the others.

It is a size ranking, not a buy list. Market cap measures how large a company is, not whether it is a good investment. For the definitions behind the ranking, start with what market capitalization is.

Which companies are included

The universe is U.S.-listed common equity on NASDAQ, NYSE, or NYSE American, above a minimum market-cap floor (currently $1 billion). That floor is shown on the homepage next to the company count. ETFs, funds, preferred shares, equity units, and warrants are excluded so the list stays a ranking of operating companies.

When a company has more than one share class, those classes are combined so the company appears once, at its full size. Companies listed only outside the United States (for example Samsung or Tencent on their home exchanges) are out of scope today.

Data, methodology, and updates

Prices, share counts, and fundamentals come from Financial Modeling Prep and are normalized into one snapshot. The ranking is rebuilt from that snapshot several times each trading day. Every page shows an “as of” date. Prices can lag live quotes by minutes to hours.

The full inclusion rules, share-class handling, and refresh cadence are in How the ranking works.

Not investment advice

MarketCapLens is for general information and education. Nothing here is a recommendation to buy, sell, or hold any security. See the disclaimer for the full terms.

Guides and notes

Short explainers live in Learn. Occasional longer notes live on the blog. Questions, corrections, and press inquiries: support@marketcaplens.com or the contact page.