Yes, you can apply for a loan against securities jointly with a co-applicant. In fact, this arrangement is often necessary if the securities being pledged are held by a close relative such as a spouse, parent, child, or sibling.
In such cases, the co-applicant’s participation ensures proper ownership validation and legal compliance. Moreover, they are required to sign the loan agreement along with you, making both parties equally responsible for the terms and repayment of the loan.