Warren C. Platt (1883–1963) started the magazine "National Petroleum News" in Cleveland, Ohio in 1909. He expanded the business with the publication of the newsletter called "Platts Oilgram" in 1923, which went on to be recognized as an influential source for petroleum prices. The companies founded by Platt that published prices and news were acquired in 1953 to become part of what was then known as McGraw-Hill group, which was later to become S&P Global. The publication activities that started with petroleum later expanded to cover energy and commodities, which were all undertaken by the division that became known as Platts.