Summary List PlacementFor the past few years, the dominant mantra across Silicon Valley was to keep companies private for as long as possible. But, even in the midst of a pandemic, a red-hot stock market is changing that calculus, encouraging a host of these high-valued, so-called unicorn startups to take the public plunge. Three of the ten biggest tech IPOs for US companies, measured by capital raised, have taken place this year: Snowflake, DoorDash, and Airbnb. And the market shows no sign of cooling in the new year, when more than a dozen startups plan to go public.