Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 156D, § 1.42

(a) For purposes of this chapter, except as provided in subsection (c), the following identified as a shareholder in a corporation's current record of shareholders constitutes one shareholder:

(b) For purposes of this chapter, shareholders registered in substantially similar names constitute one shareholder if it is reasonable to believe that the names represent the same person.

(c) For purposes of this chapter, each beneficial owner of shares registered in the name of a nominee in a corporation's current record of shareholders constitutes one shareholder.