I wasn't even counting 401Ks.
They're not Federally insured.
My 401Ks are with Fidelity and Vanguard.
Hum...
I think my count is off no matter what...
First National Bank of Marysville (incidental savings and an IRA)
Pennsylvania State Employees Credit Union (incidental savings)
Western Federal Credit Union (my company's CU, incidental savings)
Navy Federal Credit Union (my primary financial institution)
Huntington National Bank (via NRA Banking Services, excellent Money Market rates)
Pentagon Federal Credit Union (incidental savings)
I keep thinking about ditching Pentagon and Western Federal. I joined them for specific purposes, mainly because they were very convenient to where I was working at the time.
As for my 401K and other investment accounts...
Fidelity, Vanguard, Janus, and Dodge & Cox.