Chartis and All Risks Ltd., a Hunt Valley, Md.-based independent wholesale brokerage, are expanding their relationship to include a program for temporary staffing agencies.

The largest specialty insurance brokerage in the U.S. acquired a New York-based 401(k) investment and advisory firm, seeking to expand its presence in the Northeast.

Keystone Insurers Group, a Northumberland, Pa.-based insurance broker, announced its 11th franchise partner in Tennessee, increasing Keystone’s growth rate to 10% in the state, according to the firm.

Ryan & Ryan Insurance Brokers has acquired Reis Turck Associates’ insurance portfolio, according to the two companies.

Alliant Insurance Services, a national specialty insurance brokerage firm, bought T&H Group, a regional full-service insurance brokerage firm based in New York City.

Brown & Brown acquired the assets of a Berwyn, Pa.-based employee benefits firm serving the greater Philadelphia and eastern Pennsylvania area.

Insurance Marketing Center, a Rockville, Md.-based regional insurance brokerage, has a redesigned its agent website.

U.S. Risk, a national specialty lines underwriting manager and wholesale broker, acquired Sarasota, Fla.-based Unisource Program Administrators, a national workers’ compensation wholesaler.

MGH, an Owings Mills, Md.-based integrated marketing communications agency, has been contracted to redesign the website of RCM&D, a regional insurance brokerage.

The parent company of one of the largest brokerage companies in the U.S. filed for an initial public stock offering worth up to $600 million.