Conversation so far:
What allegation was made against Mark Cuban?
(SEC) filed a civil suit against Cuban relating to alleged insider trading in the shares of Mamma.com, now known as Copernic.
What was outcome?
A federal jury in Texas found in favor of Cuban on October 16, 2013.
Other than the SEC who else made this allegation ?
CANNOTANSWER.
Did he have to pay any fines related to this?
A federal jury in Texas found in favor of Cuban on October 16, 2013.

Question: When did the SEC first make this allegation?
Self-contained rewrite: When did the SEC first make the allegation of insider trading against Mark Cuban?