Robert O’Brien, Sr. appears on Tonight Show presenting “Great Western Grand Champion Steer” to host Joey Bishop. Posted: August 9, 1968 / Timeline
Robert O’Brien, Sr. elected Chairman of the Board of CME and served two consecutive one-year terms through 1968. Posted: August 9, 1967 / Timeline
An RJO employee, 22-year-old Sandra Stephens, becomes the first woman ever to work on the floor of CME. Posted: August 9, 1966 / Timeline
Robert O’Brien, Sr. elected Second Vice Chairman of the Board of Governors of the Chicago Mercantile Exchange. Posted: August 8, 1966 / Timeline
RJO takes first delivery of the new Live Cattle contract, the first live commodity traded on the CME floor. Posted: August 9, 1964 / Timeline
Robert O’Brien, Sr. elected to Board of Governors of Chicago Mercantile Exchange (CME) (served continuously from 1964-1977). Posted: August 8, 1964 / Timeline