Atria Senior Living, a retirement and aged health care services company, agreed to acquire the management services business of Holiday Retirement, a provider of retirement services. Financial terms were not disclosed. "This transaction enables Atria – by joining forces with Holiday CEO Lilly Donohue, her great team and all of the passionate and dedicated associates in Holiday communities across the country – to continue on our path to create a thoughtful variety of choices as unprecedented numbers of people seek senior living options in the decade ahead," John Moore, Atria Senior Living Chairman and CEO.