The stock market, while still up for the year, has fallen sharply this week. The S&P 500 dropped 4% in the first three days of the week, its steepest three-day decline in seven months, though the index rebounded by 1.2% on Thursday. Companies generally prefer to make their public-market debuts into a rising—or at least not volatile—stock-market environment.

Netherlands-based Hear.com was seeking to raise about $300 million in the public market at the midpoint of its targeted price range, while Brazil’s Zenvia was seeking to raise $213 million at its midpoint. Enact, a spinoff of

Genworth Financial Inc.,

was looking to raise about $500 million, according to regulatory filings.

The decisions to postpone the offerings are the latest signs of cooling for the U.S. IPO market, which has been hot for nearly a year.

Companies raced to the U.S. public markets last year despite the Covid-19 pandemic, raising a record $167 billion, according to Dealogic. The frenetic pace of fundraising showed no signs of slowing in early 2021, with companies having raised roughly $158 billion through Wednesday, according to Dealogic. Large, buzzy companies including dating-app maker

Bumble Inc.

and cryptocurrency company

Coinbase Global Inc.

are among those tapping the market this year.

But in recent weeks, those stocks have struggled as investors moved out of fast-growing companies in favor of value stocks, which typically don’t grow as quickly and trade at a low multiple of their book value.

On average, 2021 U.S.-listed IPOs, not including blank-check companies, are up 6.4% from their IPO prices through Wednesday’s close, according to the latest data available from Dealogic. This year through Wednesday’s close, the S&P 500 rose 8.2% while the tech-laden Nasdaq Composite had risen 1.1%.

Write to Corrie Driebusch at corrie.driebusch@wsj.com