Is it permissible or forbidden for banks to lend to an individual against his rights in his company, such that the lending takes place in the form of a commodity or shares that the bank sells on his behalf without the borrower seeing them, with a specific monthly amount deducted with interest?

The scenario mentioned in the question falls under the category of organized tawarruq practiced by some banks and companies, which is a deceptive maneuver to circumvent riba (usury) and is therefore prohibited. The Islamic Fiqh Academy has issued a ruling prohibiting this type of tawarruq, which involves selling a commodity to the mustawriq (the one seeking cash) for a deferred price, after which the bank undertakes to sell it on his behalf for an immediate cash price and delivers the cash to him.