Members of the AIDS Health Foundation want Gilead Sciences to lower the price it charges states which provide AIDS drugs to people who cannot afford them.
The group claims programs in 10 states are currently underfunded, leaving thousands of people on waiting lists for the drugs. California's program is fully-funded.
The protesters say Gilead is making huge profits and can afford to lower its prices. Gilead says it has kept the prices states pay frozen since 2008 and recently extended that price freeze through the end of 2013.