Developer-security startup Snyk raised $300 million to take its valuation to $4.7 billion. Its valuation has quadrupled since January 2020 as it drives the "shift left" movement. CEO Peter McKay says Snyk will not have an IPO this year, but may pursue acquisitions. Apart from Zoom and perhaps now Roblox, it would be hard to name a company that has blown up more over the past difficult year than Snyk. The developer-security startup announced a $300 million E round on Wednesday – it's second mega-round in six months, following a $200 million fundraise in September – to take it to a $4.7 billion valuation. That's four times what the Boston company was worth in the beginning of 2020.