The upcoming public listing of SpaceX on the Nasdaq, poised to be one of the largest initial public offerings ever, has a significant, quiet beneficiary. Alphabet Inc. (GOOGL), the parent company of Google, holds an approximately 4.9% stake in the aerospace firm. This investment is now valued at around $105 billion, marking it as one of the most lucrative private equity investments in Google's history.

However, converting this massive paper gain into cash is not as straightforward as selling shares on the open market. Alphabet remains subject to lock-up period restrictions and limitations on the volume of shares available for trading. Furthermore, should the company decide to divest its entire position, it would likely face a substantial tax liability.