Mont. Code Ann. § 5-7-201

The commissioner shall make available to the public the information required by this chapter, including but not limited to the name and business address of each lobbyist, the name and business address of the lobbyist's principal, and the subject or subjects to which the employment relates or a statement that the employment relates to all matters in which the principal has an interest. The docket entry for each principal must also indicate the date of receipt of the principal's lobbying reports as required by 5-7-208.