Support Fundraising Events SponsorsGet a glimpse of the generous sponsors who help make our music possible. EndowmentDonations to the endowment of the Hartford Symphony Orchestra build the HSO’s endowment and provide long-term financial stability for the organization. AdvertiseAdvertise in the Hartford Symphony playbills to reach a captive and sophisticated audience. VolunteerAre you interested in helping the Hartford Symphony at one of our many concerts? Or are you interested in helping the Hartford Symphony at our offices?