Popular tween gaming platform Roblox filed to go public on Thursday. The company declined an interview, citing a quiet period.

Investors waiting on the long-awaited public debut of Roblox Corp. finally have a date for when the tween-centric gaming platform will roll out its direct listing.

But Roblox still has to find ways of turning a profit, after reporting a history of net losses in the filing, including $97.2 million in 2018 and $86 million in 2019. Game developers, often young ...