Vote Org is a 501(c)(3) [1], so nobody owns it. It doesn't disclose major donors, though its officers and directors circa 2024 are listed there.
(One curiosity on their tax form: Vote Org reports $809k in legal-services spending to Faehre Drinker, but the actual law firm is Faegre Drinker [2]. Probably a typo.)
[1] https://apps.irs.gov/pub/epostcard/cor/262094990_202406_990_...
Again, probably a typo. But if I were up to shady fuckery, that's one way I'd hide it.