California Code, Financial Code - FIN § 1250

(1) To vote 25 percent or more of any class of the voting securities issued by a person; or

(2) To direct or cause the direction of the management and policies of a person, whether through the ownership of voting securities, by contract (other than a commercial contract for goods or nonmanagement services), or otherwise; provided, however, that no individual shall be deemed to control a person solely on account of being a director, officer, or employee of such person.

For purposes of paragraph (2) of this subdivision, a person who, directly or indirectly, owns, controls, holds with the power to vote, or holds proxies representing, 10 percent or more of the then outstanding voting securities issued by another person is presumed to control such other person.

For purposes of this chapter, the commissioner may determine whether a person in fact controls another person.

(1) In the case of a corporation, a holder of a share of any class or series.

(2) In the case of a nonprofit or charitable corporation, an unincorporated association, or a syndicate, a member.

(3) In the case of a partnership, a partner.

(4) In the case of a business trust, an estate, or a trust, a holder of a beneficial interest.

(5) In the case of an organization of any other kind, a holder of an ownership interest.