Does mcgraw hill own s and p corp?

No, McGraw Hill does not own S&P Corp. McGraw Hill Financial, now known as S&P Global, is the parent company of the S&P Dow Jones Indices, which includes the S&P 500 index. In 2016, McGraw Hill Financial rebranded itself as S&P Global, reflecting its focus on providing ratings, benchmarks, and analytics in the global market.