The company did not disclose the terms of the deal.
Gallagher bought the Fort Smith, Ark.-based retail insurance broker from Bowen, Miclette & Britt Insurance Agency LLC in Houston and Philip H. Merry Jr.
The acquired group specializes in the health care, manufacturing, retail and poultry processing industries in Arkansas and Oklahoma.
Gallagher said the staff of the Arkansas company will stay on and operate as part of Gallagher's Southeastern division.