She is the senior treasury analyst at Columbia Pictures Entertainment in New York.
He was also promoted to assistant general counsel of Columbia Pictures Entertainment.
Sony entered the television and film production market when it acquired Columbia Pictures Entertainment in 1989 for $3.4 billion.
Columbia Pictures Entertainment jumped 5 1/4, to 26 3/8, as was the most active Big Board stock on a volume of 6.2 million shares.
Tri-Star was previously a separate movie company owned by Columbia Pictures Entertainment.
Mr. Friedberg will also be a director of Columbia Pictures Entertainment.
In fact, in 1988 it reduced its stake in Columbia Pictures Entertainment to 49 percent.
The following month, the Sony Corporation bought Columbia Pictures Entertainment for $3.4 billion.
Sony's deal to buy Columbia Pictures Entertainment has made the company a lightning rod for unaccustomed criticism.
Columbia Pictures Entertainment slipped 5/8, to 14, after rising 1 3/8 on Wednesday.