Talk to the dividend reinvestment plan administartor - you should be able to find a phone number for customer service on their web site. Your divorce decree should mandate what happens with your joint accounts - if it says you get the assets in this account then no problem. But even if it doesn't - since this is a joint account you have the authority to cash out any time you want (so does your ex), so you can simply either withdraw all the stocks and cash or roll it to a new individual account in your name if you want. Again, call customer service.