WhatsApp, the world's most-used instant messenger with over 2.2 billion active users in 2021, has never had an IPO. However, investors can gain exposure to the company through its parent company, Meta (NASDAQ: META). WhatsApp was acquired by Facebook (now Meta) in a $19 billion deal in 2014, and its data has since been used to create targeted advertisements on both Facebook and Instagram. Despite controversies surrounding user privacy, WhatsApp continues to play a crucial role in Meta's advertising ecosystem. Currently, there are no plans for a WhatsApp IPO, and it is unlikely to happen anytime soon, given its importance within Meta's company structure.