PITTSFIELD, Mass. — Greylock Insurance Agency is expanding its footprint in Berkshire County with the purchase of Gallup & Casey Insurance Services, Inc.

Gallup & Casey's businesses in North Adams, Adams and Williamstown, will be combined with Greylock's existing insurance operations in Pittsfield, and owners David and Chris Casey will join the management team of Greylock Insurance as vice presidents. Greylock also announced plans to complete its countywide expansion by opening a Great Barrington insurance office within the next few months. The combined agency will have $15 million in premiums and an estimated 9,000 customers.

"Gallup & Casey is the perfect partner for Greylock Insurance Agency," said Angelo Stracuzzi, president of Greylock. "Greylock Insurance has become the fastest growing agency in Berkshire County, more than doubling its revenues since we launched it in 2004. We have two thriving locations in Pittsfield. But members outside of the central Berkshires have told us repeatedly they would like locations more convenient to where they live and work. Gallup & Casey's three locations and their outstanding staff of insurance professionals provide a perfect parallel to our North County credit union offices in North Adams, Williamstown and Adams. Our Great Barrington office will also be open soon, which will give us more insurance locations in the Berkshires than any other agency. In fact Greylock Insurance Agency will be the Berkshire's