Moderna, based in Cambridge, Mass., has reached phase three trials for its coronavirus vaccine. At the same time, its executives have sold tens of millions of dollars worth of stock, which has led to intense criticism of the company.

CAMBRIDGE, MASSACHUSETTS – MAY 08: A view of Moderna headquarters on May 08, 2020 in Cambridge, Massachusetts. Moderna was given FDA approval to continue to phase 2 of Coronavirus (COVID-19) vaccine trials with 600 participants. (Photo by Maddie Meyer/Getty Images)