StubHub, the ticketing company, has postponed its planned initial public offering (IPO) until after Labor Day due to unfavorable market conditions, aiming for a valuation of at least $16.5 billion. The delay requires resubmission of financial data to the Securities and Exchange Commission. StubHub, acquired by eBay in 2007 and repurchased by co-founder Eric Baker in 2020, faces challenges amidst a stagnant market and lack of recent major consumer IPOs.