Ticker symbol changes Mar 28, 00:52
No, there's no way to search by the old ticker symbol. Mar 28, 09:51
Kaiigee's site lists Ticker symbol changes but you have to look at each date to find any changed for that week {nm} Mar 28, 22:24
If some stocks vanished from your port, check your trade history. It is possible they were delisted either due Mar 29, 06:46