What is the approximate value of Google's investment in SpaceX now? Would Google have to disclose if it bought more stake or sold any of its original stake?
It looks like they invested via convertible bonds -- you can see the appreciation via the "Non-Marketable Debt Securities" line in their financial statements.
It was about $1b in 2015 after they made the investment - if you ignore other little sales/purchases, it had increased to $1.8 billion in 2017.
They then note "During the year ended December 31, 2018, the terms of a non-marketable debt security were modified resulting in an unrealized $1.3 billion gain" and then the balance sheet shows a non-marketable equity security, so they must have converted at that point. The value increased by $4 billion in 2018 and another $3 billion in 2019 -- though both include other investments they'd made in private companies.
By 2022, they had a total of $12 billion in unrealized gains in that category.. The majority of that is likely SpaceX so probably at minimum 10x'ed their investment?
https://spacenews.com/google-spacex-investment-is-900-millio...
(disclosure: googler, just something I've been curious about and figured someone here would have more insight on)