Labaton Sucharow, a leading plaintiffs-side securities litigation firm, has bulked up its U.S. Securities and Exchange Commission whistleblower practice, adding three new partners in Washington, D.C., and Chicago.

In a statement issued Tuesday, Labaton announced the arrival of former federal prosecutor Steven Durham and former SEC enforcement officials Timothy Warren and Robert Wilson. With the hires, Labaton will also open offices in Chicago—where Warren is based—and in D.C., where both Durham and Wilson will reside.

The chairman of Labaton's SEC whistleblower practice, Jordan Thomas, said the addition of the three new partners will make his group one of the strongest in the nation. Thomas, who is based in New York, started Labaton's SEC whistleblower practice in 2011 after spending time in the SEC's enforcement division, where he helped lead the development of the agency's whistleblower program.