Figma Inc.’s record-breaking debut gains are cooling, but they have still handed a windfall to investors including the select institutions that were able to get their hands on the IPO shares, sparking debate over whether the stock was priced too low.

The price for design software developer Figma surged more than 250% on Thursday to close at over $117 per share after raising over $1.2 billion in an IPO, well over three times the $30-$32 range the company estimated in SEC filings earlier this week—making its 33-year-old CEO Dylan Field a billionaire.

Design startup Figma listed its shares on the New York Stock Exchange in a year when IPOs from buzzy tech firms have come roaring back.