The Massachusetts Antitrust Act provides for the antitrust laws in Massachusetts.  Under the provision ALM GL ch. 93, § 12, any private person or an Attorney General may bring an action to enforce the Act.  The statutory period of limitation, under § 13, in order to bring an action under this Act is four years after the cause of action accrued.

ALM GL ch. 93, § 12
Any person who shall be injured in his business or property by reason of a violation of the provisions of this chapter may sue therefore and recover the actual damages sustained, together with the costs of suit, including reasonable attorney fees. If the court finds that the violation was engaged in with malicious intent to injure said person, the court may award up to three times the amount of actual damages sustained, together with the costs of suit, including reasonable attorneys fees.
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Commencement of an action by the attorney general under section nine, whereunder the attorney general acts as parens patriae on behalf of natural persons residing in the commonwealth, shall serve to stay any civil action under this section or under the provisions of chapter ninety-three A on behalf of said natural persons against the same defendant which is based in whole or in part on any matter complained of in the action commenced by the attorney general.

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ALM GL ch. 93, § 13
An action brought to enforce the provisions of this Act shall be barred unless commenced within four years after the cause of action accrued.
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