Washington Revised Code Title 82. Excise Taxes § 82.45.033. “Controlling interest” defined

(a) In the case of a profit corporation, either fifty percent or more of the total combined voting power of all classes of stock of the corporation entitled to vote, or fifty percent of the capital, profits, or beneficial interest in the voting stock of the corporation; and

(b) In the case of any other corporation, or a partnership, association, trust, or other entity, fifty percent or more of the capital, profits, or beneficial interest in such corporation, partnership, association, trust, or other entity.

(a) In the transfer or acquisition of a controlling interest as defined in subsection (1)(a) of this section, either against the corporation in which a controlling interest is transferred or acquired, against the person or persons who acquired the controlling interest in the corporation or, when the corporation is not a publicly traded company, against the person or persons who transferred the controlling interest in the corporation; and

(b) In the transfer or acquisition of a controlling interest as defined in subsection (1)(b) of this section, either against the entity in which a controlling interest is transferred or acquired or against the person or persons who transferred or acquired the controlling interest in the entity.