Katherine Bogdanovich Loker, an heir to the StarKist tuna fortune and a major philanthropist in Southern California, died June 26 at her Oceanside, Calif., home of complications of a stroke, according to a spokesman for the University of Southern California, her alma mater.

She was 92.

Loker and her late husband, Donald, donated more than $30 million to USC.

In 1977, they gave $15 million to establish USC’s Hydrocarbon Research Institute and support the work of professor George Olah, who was awarded the Nobel Prize in chemistry in 1994.

She also funded the $3.4 million Katherine B. Loker Track and Field Stadium and a $1.5 million acting fellowship to the USC School of Theatre.

She donated $7 million to the Richard Nixon Library in Yorba Linda, Calif., for a 47,000-square-foot addition that re-created the East Room of the White House.

Harvard University, her husband’s alma mater, also benefited from her donations. She gave nearly $30 million to the school, which named the Loker Reading Room in Widener Library and Loker Commons for her.

Katherine Bogdanovich was born in 1915 in San Pedro, a Los Angeles neighborhood, to Yugoslavian immigrant parents.

Her father, Martin, was a tuna fisherman who founded what became StarKist Foods, one of the world’s largest tuna fishing and canning operations.

She attended USC, receiving a bachelor’s degree in English in 1940 and participating in track and field.

After graduating, she married Donald Loker, who had a Hollywood acting career using the stage name Don Terry. He left acting to work for StarKist, rising to the position of vice president of the company. He died in 1988.

Survivors include two daughters, Deborah Hicks and Katherine Leahy; six grandchildren; a great-grandchild; and her sister, Nina.