Impact of big IPO’s on Target Date Funds

I have been thinking about the impact of the big IPO’s - Space X, Anthropic and Open AI and the exposure that Target Date Funds will have post IPO to those public securities. Using Vanguard as the example, most of their Target Date Funds are invested in Vanguard Total Stock Market Fund. The percentage of ownership is dependent the actual Target Date (ie 2030 vs 2065). The Total Stock Market Fund is exactly that, meaning it owns all the public stocks of the US (within certain parameters). So on t