Carlos Osório de Castro is highly regarded by market sources for his outstanding expertise in corporate and capital markets transactions. A peer highlights his "innovative solutions in the field of corporate law," going on to say: "He has extensive knowledge of different areas of law, and pools knowledge from multiple practice areas when co-ordinating deals."

Carlos Osório de Castro is lauded by clients as a "very reputable and bright lawyer."He is adept at handling public and private M&A in the energy and real estate sectors and offers additional expertise in capital markets.

Carlos Osório de Castro is hailed as a "classic lawyer" by interviewees. He offers support on ECM deals, including IPOs and share capital transactions.