15 U.S.C. § 77o : US Code - Section 77O: Liability of controlling persons

Search 15 U.S.C. § 77o : US Code - Section 77O: Liability of controlling persons

Every person who, by or through stock ownership, agency, or
otherwise, or who, pursuant to or in connection with an agreement
or understanding with one or more other persons by or through stock
ownership, agency, or otherwise, controls any person liable under
sections 77k or 77l of this title, shall also be liable jointly and
severally with and to the same extent as such controlled person to
any person to whom such controlled person is liable, unless the
controlling person had no knowledge of or reasonable ground to
believe in the existence of the facts by reason of which the
liability of the controlled person is alleged to exist.