Kansas City-based Am Law 200 firm Stinson Leonard Street has completed its second acquisition since the spring, adding two dozen lawyers in the St. Louis area.

After a merger with intellectual property firm Senniger Powers takes effect Oct. 1, Stinson will have about 75 lawyers in Clayton, Missouri, which borders St. Louis. The combination will add about 24 lawyers and 14 staff to the firm, managing partner Mark Hinderks said.