Here's Wikimedia's confirmation of exemption letter. https://upload.wikimedia.org/wikipedia/foundation/9/90/501%28c%293_Letter.png https://upload.wikimedia.org

Here's Wikimedia's confirmation of exemption letter. https://upload.wikimedia.org/wikipedia/foundation/9/90/501%28c%293_Letter.png https://upload.wikimedia.org/wikipedia/foundation/9/90/501%2... To go further, I'd look up exactly what "Public Charity Status 170(b)(1)(A)(vi)" is, and then compare that to how they describe themselves here: https://wikimediafoundation.org/wiki/FAQ/en https://wikimediafoundation.org/wiki/FAQ/en