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Photos: Top 10 biggest Southern California companies

Pasadena-based Jacobs Engineering Group is one of the world's largest providers of professional technical services, with more than $12 billion in revenue in the past 12 months.

Pasadena-based Jacobs Engineering Group is one of the world’s largest providers of professional technical services, with more than $12 billion in revenue in the past 12 months.  (Cheryl A. Guerrero / Los Angeles Times)

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Here are the biggest public companies in Southern California, based on revenue data from FactSet.

9: Edison International

Rosemead-based Edison International, parent of San Onofre nuclear power plant operator Southern California Edison, had nearly $13 billion in revenue in the last year.

  (Allen J. Schaben / Los Angeles Times)

8. Aecom Technology Corp.

Construction giant Aecom Technology Corp. is new on the list with more than $13 billion in annual revenue. Los Angeles-based Aecom acquired URS Corp. in October. Among Aecom’s projects has been the renovation of the Tom Bradley International Terminal at Los Angeles International Airport.

  (Al Seib / Los Angeles Times)

6: Western Digital Corp.

Irvine-based Western Digital Corp., the largest maker of hard-disk drives, had more than $15 billion in revenue in the past year.

  (Kirk McKoy / Los Angeles Times)

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5: Amgen Inc.

Thousand Oaks-based biotechnology company Amgen Inc. had more than $20 billiion in revenue in the past 12 months.

  (Anne Cusack / Los Angeles Times)

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