Is it permissible for me to sell a property to my friend through a company other than the one I work for in order to obtain a larger commission, knowing that he is unaware of the company I work for, and that he initially came to me?

If an employee works as a private agent, he is not permitted to redirect his company's clients to competing companies. If a customer approaches his company to purchase a commodity or service, the employee may not direct him to other companies, unless it is impossible to complete the transaction through his company, or if it is a necessary advice, such as the presence of deception in the commodity. However, if the customer approaches the employee personally, there is no harm in him fulfilling his request, whether through his company or another, provided that his motive is not an increase in commission.