Itasca, Ill.-based insurance broker Arthur J. Gallagher & Co. said it has acquired The Treiber Group LLC and Treiber Agency Group LLC, both located in Garden City, N.Y. Terms of the deal were not released.

Gallagher said The Treiber Group is a retail insurance broker, with roots going back to 1899, that offers risk management, commercial and personal property-casualty, life and health insurance services to its clients in the New York tri-state area.

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