Usually no borrow until 2 days after. You have to wait until shares hit lending pools (basically people saying they are willing to lend out their shares for a f

Usually no borrow until 2 days after. You have to wait until shares hit lending pools (basically people saying they are willing to lend out their shares for a fee). This doesn't happen until trades from the IPO "settle" t+2 (standard time for a trade from a buyer to a seller to be booked, and for a buyer to actually receive ownership of the shares. Ownership in this case meaning you can lend / margin them etc) Options usually won't be listed for a week or so at the earlier until after the IPO, so whoever mentioned that below is wrong. Varies deal to deal and if traditional listing / direct but that is the gist.