Could you clarify for me which aspect of Vanguard you're referring to when you ask "What bank owns Vanguard?"? Vanguard Group, Inc. is primarily known as a large mutual fund and ETF provider, not a traditional bank. It operates under a unique ownership structure where the funds it manages own the company, with the funds' shareholders being the ultimate owners.
If you're asking about Vanguard's relationship with traditional banks or financial institutions, it's worth noting that Vanguard does offer various banking services through its Vanguard Federal Money
market Fund and Vanguard Brokerage Services, but these services are offered through separate legal entities and are not directly owned by any traditional bank.
So, in summary, Vanguard Group, Inc. is not owned by a traditional bank, but rather by the shareholders of its funds. Its financial services are offered through separate entities, which may have banking partners or relationships, but Vanguard itself does not operate as a bank.