TikTok stock is currently in private equity shares with a majority owned by ByteDance Limited which is also a private Chinese company still in its start up phase. Tiktok stock is not publicly traded on an exchange. There is no way to buy TikTok shares in the stock market because neither it nor its parent company ByteDance Limited are publicly traded companies. ByteDance does have plans to launch a TikTok Global initial public offering in the United States, but no date for the IPO has been set yet. The current planned rounds of fundraising would leave ByteDance with an 80% ownership of TikTok Global stock before it goes IPO.
Stock analysts estimate TikTok Global’s value at a minimum of $60 billion. TikTok Global would be the U.S. company created to own and operate TikTok’s business operations in North America, Australia, and a few others. ByteDance would own the remaining TikTok operation, including China. Currently, ByteDance currently has no specific date to go IPO in 2021.
The current government negotiated agreement is for Walmart & Oracle will hold 20% in TikTok Global, which could provide stock investors with a way to gain portfolio exposure to TikTok through owning WMT and ORCL shares. Oracle would own a 12.5% stake of TikTok Global, and Walmart would own a 7.5% stake under the current plan. However this exposure will be an indirect investment in TikTok and be a tiny fraction of those company stocks. TikTok would have to grow exponentially for it to impact their big cap stock values as the companies are already some of the biggest in the world. 
TikTok is currently the biggest and fastest growing social media app and a publicly traded TikTok stock would be a great addition to the U.S. stock market.