LONDON, July 21, 2025 /PRNewswire/ -- S&P Dow Jones Indices ("S&P DJI"), a division of S&P Global (NYSE: SPGI) and the world's leading index provider, today announced that it has entered into a definitive agreement to acquire ARC Research, a subsidiary of ARC Group, and the leading independent provider of investment performance data, benchmarking capabilities and insights in the private wealth market.ARC Research maintains the world's largest proprietary dataset of more than 500,000 private client portfolio ...