Well, Wikimedia does have an Endowment, currently valued at $169 million. See Form 990:

https://wikimediaendowment.org/wp-content/uploads/2026/05/20...

This is in addition to assets of around $300 million held by the Wikimedia Foundation. Form 990:

https://foundation.wikimedia.org/wiki/File:Wikimedia_Foundat...

For expenses breakdown see the most recent audited accounts:

https://foundation.wikimedia.org/w/index.php?title=File:Wiki...