How much did you pay in taxes last year? If you paid any taxes at all, there’s a good chance that your effective tax rate was higher than the tax rates of three huge drugmakers: Amgen (NASDAQ: AMGN), Eli Lilly (NYSE: LLY), and Gilead Sciences (NASDAQ: GILD). And one big pharmaceutical company, Allergan (NYSE: AGN), didn’t pay a penny in U.S. taxes. Here’s why.
