In 1975 Smith Barney merged with Harris, Upham & Co. to form Smith Barney, Harris Upham & Co., which, in 1977, was placed under SBHU Holdings, a holding company. In 1982, SBHU Holdings was renamed Smith Barney Inc.[3] During the 1980s, the company was known for its television commercials featuring actor John Houseman, with the catchphrase, "They make money the old fashioned way...they earn[4] it."

In 1993 Weill bought stockbroker Shearson back from American Express for $1 billion ($1,505,893,229 in current dollar terms), and merged it into Smith Barney.[5][6] Weill offered Joe Plumeri the presidency of Smith Barney, and he became the President of the merged company that year.[7][8][5] He only lasted a year, as he experienced conflicts with existing Smith Barney managers.[5]
In September 1997, Travelers acquired Salomon Inc. (parent company of Salomon Brothers Inc.), for over $9 billion ($12,197,171,381 in current dollar terms) in stock, and merged it with its own investment arm to create Salomon Smith Barney.[clarification needed] In April 1998 Travelers Group announced an agreement to undertake a $76 billion ($101,416,342,412 in current dollar terms) merger between Travelers and Citicorp, creating Citigroup, which at the time of the merger was the largest single financial services company in the world.