Seems like deposits to Stocks.exchange aren't working.
Note that they do take 6 confirmations before showing deposits. Wait a little while, if you still don't have success, open a ticket with them.
I am almost certain that stocks.exchange is using a daemon built since the latest git release but I contacted them to verify.
I test sent a couple TXs, they are well over 20 confirms and not showing up. I opened a support ticket, but it only disappeared right after I submitted it.