The department of a corporation which is involved with company’s financial activities is called "Corporate finance”.
According to Freedictionary,” The financial activity of corporation is called corporate finance.
According to Wikipedia,” Corporate finance is an area of finance dealing with the financial decisions corporations makes and the tools and analysis to make these decisions.”
According to Allbusiness.com,” Corporate finance deals with promotion, organization, capitalization, financing, investing and financial administration of the corporation .”
According to Aswath Damodaran,” Corporate finance, as, define it, every decision a firm makes that may affect its finance.”