The Financial Industry Regulatory Authority (FINRA) flexed its muscles in 2011, marking the third straight year of increases in the number of disciplinary actions it filed against U.S. securities firms, according to a new analysis by Sutherland Asbill & Brennan.

FINRA, which oversees approximately 4,435 brokerage firms, filed 1,488 disciplinary actions in 2011—up from 1,310 cases in 2010 and 1,158 cases in 2009. The regulator also barred 329 individuals in 2011, compared to 288 individuals the year before.