Navan, the corporate travel and expense platform, finished its first day of trading on the Nasdaq on Thursday down 20% from its $25 IPO price, resulting in a valuation of approximately $4.7 billion for the 10-year-old company. The company was the first to use a new SEC rule that allows public listings during a government shutdown. Unlike the traditional IPO path, which requires SEC regulators to review and grant final approval, companies using the shutdown workaround can get automatic approval