Deep Source Holdings Limited is an investment holding company engaged in the processing, distribution, and trading of bulk commodities and related products in the People's Republic of China, Hong Kong, and Singapore. It also provides securities and derivatives financial services, margin financing, fund management, futures contract brokerage, clearing, financial derivatives consulting, commodity trading, inter-dealer broking in over-the-counter markets, trade facilitation, and derivative trading services. In addition, the company is involved in money lending, brokerage of physical commodities, trade facilitation in physical gold and silver, distribution and trading of petrochemical products, loan financing, and freight services agency. Formerly known as Theme International Holdings Limited, it changed its name to Deep Source Holdings Limited in July 2025; it was incorporated in 1993, is headquartered in Sheung Wan, Hong Kong, and operates as a subsidiary of Wide Bridge Limited.