The IPO Class of 2021, Five Years of Hindsight Later
The biggest IPO year in American history minted instant giants and then spent years teaching them gravity. Part of our Looking Back series on 2020 to 2026, written from 2026 with the report cards in.
The Biggest Window Ever
An IPO, an initial public offering, is the moment a private company first sells shares to the public, and companies time these moments the way surfers time waves. 2021 was the biggest wave in American market history. Roughly 400 traditional IPOs raised more than 140 billion dollars, both records, and that count excludes the parallel SPAC boom covered in its own entry, which more than doubles the total number of companies that went public. Everything a founder could want was in place, indexes at all time highs, interest rates at zero, retail investors flush with stimulus savings, and a market paying historic multiples for growth.
Five years later, the class of 2021 is one of the best natural experiments in market history, because we get to grade an entire cohort that listed at the exact top of a valuation regime.
The Yearbook
The class had genuine star power. Coinbase, the crypto exchange, went public in April through a direct listing and was briefly valued near 86 billion dollars, the coming out party for the whole crypto industry. Rivian, an electric truck maker, raised about 11.9 billion dollars in November, the largest US IPO since 2014, and within days its market value passed 150 billion dollars, more than Volkswagen, General Motors, or Ford. At the time, Rivian had delivered only a token number of trucks. Robinhood, the trading app that powered the meme stock era, listed in July. Around them came dozens of software, fintech, and consumer names priced at revenue multiples that assumed flawless execution forever.
When a company with negligible revenue is worth more than a century old automaker selling nine million vehicles a year, the market is not making a forecast, it is making a confession about how much money is chasing how few stories.
The Grades Come In
The repricing began within months. The Renaissance IPO index, which tracks recent listings, fell about 57 percent in 2022, roughly triple the broad market\'s decline, and many individual names in the class fell 70 to 90 percent from their peaks. The mechanism is the one this series keeps returning to. Newly public growth companies are the longest duration assets in the market, nearly all of their value sits in profits expected many years out, so the 2022 rate shock hit them hardest of anything on the exchange.
But rates were only half the grade. The other half was that 2021 pricing had assumed pandemic era growth rates were permanent. Companies that IPO in a euphoric window are, by selection, the ones whose bankers judged the moment optimal, meaning investors were systematically offered shares at the sellers\' chosen top. That is not a scandal, it is the structure of the transaction, and 2021 is the cleanest demonstration on record. The people with the most information about the company, its founders and early investors, chose that moment to sell. The buyers should have asked why.
The Survivors and the Lesson in the Spread
Five years on, the class did not fail uniformly, and the spread is the education. The businesses with real unit economics, network effects, or category leadership survived the drawdown, rebuilt, and in several cases eventually justified meaningful valuations. The ones priced purely on story, pre revenue vehicle makers, growth at any cost software, consumer apps with no path to margin, mostly stayed down, got acquired cheaply, or disappeared. The 2021 price told you almost nothing about which group a company belonged to. The business model told you almost everything.
That is the practical skill hiding in this retrospective. Reading an IPO prospectus for burn rate, unit economics, and insider selling behavior would have separated the two groups in advance far better than any price chart, and it still does.
The Bottom Line
The class of 2021 listed into the most generous market in history and spent the next years being graded by the least generous one. The record IPO volume was itself the signal, insiders sell most eagerly at tops, and buyers who treated a hot listing window as validation rather than a warning paid the tuition. Judge companies by their economics and judge windows by who is selling into them. The class of 2021 teaches both lessons better than any textbook.