What is the ruling of Islamic law on investing in a global management consulting firm that provides services to various companies, given that part of its income may result from offering consultations to companies involved in activities forbidden by Islamic law, such as alcoholic beverage companies?

Do not invest your money in a consulting firm that provides services beneficial to prohibited companies, such as alcohol companies. Permissible avenues of earning are many. Allah Almighty says: "{And whoever fears Allah - He will make for him a way out And will provide for him from where he does not expect.}" And the Prophet, peace and blessings be upon him, said: "Indeed, the Holy Spirit inspired in my heart that no soul will die until it completes its provision and its term. So, fear Allah and be graceful in seeking provision."