J. K. Lilly Sr. initially served on the foundation's board and became its largest contributor. Over time he donated Eli Lilly and Company stock worth a total of $86.8 million to the foundation, including a $30 million bequest following his death in 1948. J. K's sons, Eli and Joe, contributed additional Eli Lilly and Company stock that had a combined value of $6.8 million. Eli also managed the foundation in its early years. The Lilly Endowment's first full-time staff members, Josiah K. Lilly III and G. Harold Duling, were hired in 1951. By the mid-1970s, the foundation's staff had increased to seventy-five and it had moved to larger headquarters at 2801 North Meridian Street in Indianapolis.