Transferring US market stocks out of OCBC securities

I previously use it to hold dividend stocks when I was younger as it had fee wavers and promotions for people 25 and below. But I've since aged past that, and the amount of fees are getting annoying. I wanted to transfer it out to either my TDA or TB account, but I do not see them under the brokerage transfer list. Anyone have experience transferring it out? Selling to rebuy them again would be a hassle especially with my cost basis.