What Is a Unicorn Company? Definition, How It Works and Examples

The term comes from a single article. In November 2013, Aileen Lee, founder of Cowboy Ventures, published “Welcome To The Unicorn Club” on TechCrunch. She studied US-based software companies started since 2003 and valued at over $1 billion by public or private market investors. She found 39, about 0.07% of venture-backed consumer and enterprise software startups. She called the outcome what it was: “extremely rare.”

The unicorn company meaning has narrowed since. Lee’s club included companies that were already public, such as Facebook. She called Facebook a “super-unicorn” because it was worth more than $100 billion. Today, the word is used almost only for private companies, in any sector and any country. A company stops being one when it lists or is acquired, and it becomes a “former unicorn.” The threshold has stayed at $1 billion, measured at the latest priced round.

Two labels now sit above it. A decacorn is valued at over $10 billion. A hectocorn is valued at over $100 billion, the tier Lee called super-unicorn. Three well-known private companies were hectocorns in 2026. Anthropic was valued at $965B post-money in May 2026, OpenAI at $852B in March 2026 and Stripe at $159B in a February 2026 tender offer. SpaceX was one until it listed in June 2026.

A company becomes a unicorn on the day a round closes at a post-money valuation of $1 billion or more. That is the value of the whole company right after the new money comes in. Nobody certifies it. The figure is arithmetic on the round’s terms, published by the company or its investors and repeated by trackers. So the difference between a startup and a unicorn lies in one number: the price one investor agreed to pay for one class of shares. Revenue, profit and headcount play no part in the definition.

Unicorn company growth stages follow the round letters (Series A, B, C and so on), and no fixed timetable applies. A company can stay private for years after crossing the line. That is where the pre-IPO market comes in. The shares change hands in secondary transactions, where holders sell to new buyers, and in tender offers run by the company, long before any listing. What is a pre-IPO company sets out how that stage works.

The qualifiers add a filter and keep the same $1 billion threshold. “U.S. unicorns” means private companies valued at $1 billion or more and headquartered in the United States. “European unicorns” and “UK unicorns” apply the same test by headquarters. “Fintech unicorns” and “AI unicorns” are filtered by sector instead. A fintech unicorn is a private financial-technology company valued at $1 billion or more.

Counts by region or sector differ between trackers. Each one decides where a company is based, which sector it belongs to and which rounds it accepts as evidence. The one count on this page is CB Insights’ global total. It stood at 1,447 companies when this page was checked on October 2, 2026. It is a snapshot of one tracker’s list and is not a full census.

A post-money valuation assumes that every share is worth what the newest investor paid. In practice, shares differ. Late-stage preferred shares usually carry a liquidation preference, the right to get their money back first in a sale. Some carry more: a guaranteed return at an IPO, a veto over a listing below their price or seniority over every earlier class. Common stock has none of these. That is why its fair value sits well below the preferred price. That value is set by a 409A valuation, an independent appraisal of the common stock.

Two researchers, Gornall and Strebulaev, measured the gap. They valued 135 US unicorns share class by share class, using the companies’ legal filings. Reported post-money valuations averaged 50% above fair value. Common shares were overvalued by 58%. Of the 135 companies, 65, or 48%, would lose unicorn status once the protective terms were priced in. Recent investors had IPO return guarantees in 14% of the companies. They could veto a listing below their price in 24% and ranked ahead of all other investors in 32%.

There is a second gap, between any private figure and what a buyer will pay today. Secondary quotes, the prices at which existing shares change hands, can sit below or above the last round. A buyer may also apply a discount for lack of marketability, a price cut because the shares cannot be sold freely. Common stock vs preferred stock sets out the difference in class rights.

Common Mistakes

• Treating $1B as what the company is worthIt is the newest share’s price times all shares, including weaker classes.
• Valuing your options at the round priceCommon stock is priced by the 409A, usually well below the preferred.
• Reading the label as qualityRevenue and profit play no part in the definition.
• Assuming the status is permanentA down round, priced below the one before, can take the valuation under $1B and end it. A listing or a sale ends it too.
• Comparing tracker counts as if they agreedEach list uses its own rules for region, sector and evidence.

Unicorn

A private, venture-backed company valued at $1 billion or more in its latest priced round.

Decacorn

A private company valued at over $10 billion.

Hectocorn

A private company valued at over $100 billion. In 2013, Lee called this tier super-unicorn.

Former unicorn

A company that was a unicorn and has since listed or been acquired.

Pre-money valuation

The company’s value just before a round: the round’s price per share times the shares that existed before it.

Post-money valuation

The round’s price per share multiplied by all shares after the new money. It reflects one negotiation and is not an appraisal.

Liquidation preference

A preferred holder’s right to be repaid before common holders in a sale.

409A valuation

The independent appraisal of a private company’s common stock used to price employee options.

Down round

A round priced below the previous one. It can take a company below the unicorn threshold.

Figures were last checked on October 2, 2026. Private valuations are the post-money of the most recent priced round or sale. They are not appraisals, and they change. Company-by-company valuation histories are on the companies pages.