Name that company

An early biotechnology company, I was founded in California in 1980 by some venture capitalists and am now one of the largest independent global biotech companies. I found early success in locating and cloning the erythropoietin gene. That led to my blockbuster drug Epogen, which treats anemia resulting from chronic kidney disease and has generated tens of billions of dollars in sales. I employ 20,000 and rake in $23 billion annually. I went public in 1983, and my shares have posted double-digit average annual gains over the past 10, 20 and 30 years. Who am I?

Last week’s trivia answer: FICO