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Find yourself a smaller broker/dealer. They will most likely be willing to work with you. As a series 7 your still going to need to be under a supervising manager so it more than just getting someone to "sponser" you. You will also need the state exam, and then other exams for bonds and different securities.
What is your end goal, is it to have your own brokerage? There are additional requirements.
To start your own fund, even different requirements.
Just post what you are trying to accomplish.
After considering your question, it dawned on me that Prudential sponsored me. In my mind I did it on my own and then I remembered. There was a sponsor.
cool thanks