ROLLING MEADOWS, Ill., Aug. 18, 2025 /PRNewswire/ -- Arthur J. Gallagher & Co. (NYSE: AJG) ("Gallagher") today announced it has closed the previously announced acquisition of AssuredPartners (the "Transaction").  "I am extremely excited to welcome our new colleagues to Gallagher," said J. Patrick Gallagher, Jr., Chairman and CEO. "Together, we will further build upon our client-centric, entrepreneurial cultures and utilize our product and industry expertise, extensive data, innovative analytical tools, outs ...