Yes, shareholders remain eligible for corporate action benefits even if they sell the shares on the ex-date/record date. The Whole purpose of the exchanges declaring the ex-date is that any shares sold from the ex-date will be without the corporate action.  The key requirement is to have the shares in your demat account on the record date to qualify for these benefits. If shares are sold on the ex-date they will be debited from the demat account on the next day, i.e., T+1 day, and not on the same day. The ex-dates are declared by the exchanges in such a way that settlement of the same happens only after Record date.