What is the word or phrase of the relationship between an account and a bank?

I am looking to describe the relationship between a bank account (such as a checking account, a loan, etc.) to a bank or other financial institution.

Right now, I am using is conducted by, as in

Account 123 is conducted by My Credit Union.

I have also considered is held at (or is being held at), and is managed by.

But all of these seem awkward. Are there other phrases or words for this relationship that are accurate and more elegant?

Solution 1:

You could switch it around:

The Commonwealth Bank holds account 123

But its normally:

Account 123 is held at the Commonwealth Bank

Solution 2:

Held by (or at) is perhaps the most common phrase in this case. Managed by is also quite common. A search turned up several other possible phrases to express this relationship:

Various accounts are also said to be owned, maintained, rendered, kept, controlled, administered, handled, implemented, operated, run, and trusteed by their various financial institutions.