execution of all real estate transactions, brokerage and real estate promotion; the company may, however, purchase, sell, renovate, administer and manage all real estate; it may carry out, either on its own account or on behalf of third parties, all other activities of any nature, in particular financial, commercial, industrial, movable and immovable, convergent activities, with the exception of properties subject to the LFAIE, in Switzerland and abroad, directly or indirectly related to its main purpose; it may also create branches in Switzerland and abroad; it may also participate in any company, acquire or pay fees and commissions, negotiate and execute various contracts or mandates in different countries; it may also provide financial assistance, including loans, advances, guarantees or securities of all kinds to its shareholders, affiliated companies or third parties