Can I add another person to my demat account?

Yes, Demat accounts can be held by one, two, or three people at the same time.

Demat accounts can also be held by companies and partnership firms.

If you would like to have more than one person on a demat account, you have to do so at the time of account opening. Once an account is already open, you cannot add another person to it. Your only alternative is to open another demat account.