https://lists.wikimedia.org/hyperkitty/list/wikimedia-l@list...
This is from September of last year but it definitely changed my mind about this stuff.
> In fact, however, the Wikimedia Foundation is richer than ever. Its assets and reserves (including an Endowment with the Tides Foundation now holding well over $100 million) have increased fivefold since 2015, and stood at an estimated $400 million at the end of March 2022.