Complex sentence: OTC Markets Group, Inc. informally known as "Pink Sheets" is a private company that provides services to the U.S. over-the-counter (OTC) securities market including electronic quotations, trading, messaging, and information platforms.
Split into simpler sentences: OTC Markets Group, Inc. informally known as "Pink Sheets" is a private company that provides services to the U.S. over-the-counter (OTC) securities market. It provides electronic quotations, trading, messaging, and information platforms.