Online video game platform Roblox has filed confidentially for a public listing. The San Mateo, California-based company submitted a draft statement to the US Securities and Exchange Commission, according to a statement on Monday. The number of shares to be offered and the potential price range have not yet been determined. Roblox is aiming for a public valuation of about US$8 billion, Reuters reported on October 1. That would double the US$4 billion valuation it got in a US$150 million fundraising round in February led by venture capital firm Andreessen Horowitz. The company hosts millions of games that are built by its users, who then get a share of any related revenue. It says that two-thirds of all US kids 9 to 12 years old use the platform. Founded in 2004, Roblox added Andrea Wong to its board last month. She was most recently the president of international at Sony .