AmWINS Group Inc. has agreed to buy 15 insurance programs from Willis Towers Watson Plc.

Terms of the deal were not disclosed. The transaction is expected to close Oct. 31.

The programs to be acquired will become part of AmWINS Program Underwriters. Among the programs being bought are MountainGuard, which provides underwriting, claims and loss control services to ski resorts in North America, and DealerGuard, which provides dealer open lot and comprehensive package coverages for franchised and independent auto, truck and recreational vehicle dealers.

The 15 programs have a team of more than 115 employees with offices in Portsmouth, N.H.; Burlington, Vt.; Tampa, Fla.; Detroit; Denver; Salt Lake City; and Hartford, Conn.