Mont. Code Ann. § 33-12-108

Control is presumed to exist if a person, directly or indirectly, owns, controls, holds with the power to vote, or holds proxies representing 10% or more of the voting securities of another person. This presumption may be rebutted by a showing that control does not exist in fact. The commissioner may determine, after furnishing all interested persons notice and an opportunity to be heard and making specific findings of fact to support the determination, that control exists in fact, notwithstanding the absence of a presumption to that effect.