During the financial crisis in 2008, I ended up employed by a different entity (Bank of America, because they bought Merrill Lynch) and I also ended up banking with a different entity (J.P. Morgan Chase, because they bought all of Washington Mutual's accounts). Before my account was with Washington Mutual, I was a Great Western customer. *phew*
There are no more Wall Street firms. They're all owned by banks now, or they became bank holding companies (Goldman Sachs and Morgan Stanley both did this).
It's interesting to see which brand names have survived; Merrill Lynch's has, despite everything that happened. Chase has rebranded everything; you'd never know my account was ever with WaMu unless you sneak a peek at my checkbook (I write one check per month - for rent, so it'll be a while before I need to order new ones!).
Here's another example: I had two MBNA credit cards. Then Bank of America bought out MBNA. Obviously, I now have B of A credit cards instead - that I pay off every month.
The same thing happened with my cell phone carrier. I started out with Cingular, and now I'm with AT&T.