AIG to Acquire Glatfelter Insurance Group NEW YORK and YORK, Pa.--(BUSINESS WIRE)--Leading global insurer American International Group, Inc. (NYSE: AIG) today announced it has entered into a definitive agreement to acquire Glatfelter Insurance Group (“Glatfelter”), a full-service broker and insurance company providing services for specialty programs and retail operations. Headquartered in York, Pennsylvania, Glatfelter brings high-quality program underwriting capabilities that wil...