Guy Carpenter & Company, LLC, the leading global risk and reinsurance specialist, today announced the successful completion of the previously announced acquisition of John B. Collins Associates, Inc. (Collins). The acquisition of Collins, the fifth largest reinsurance intermediary in the United States and seventh largest in the world, further strengthens Guy Carpenter's capabilities in medical professional liability, agriculture, Florida property, program, and regional specialty lines of business. Terms of the transaction have not been disclosed.