The creators of “South Park” are branching out beyond the underpants business.

Taking after the Gnomes on the animated series who ardently practice American capitalism, Trey Parker and Matt Stone have wooed investors and raised money to form their own production studio, which they plan to announce on Monday.

The new company is to be called Important Studios and hopes to be just that. With an estimated value of $300 million built on revenue from “South Park,” now in its 16th season on Comedy Central, and the Broadway megahit “The Book of Mormon,” the studio will have the power and money to approve television, movie and theater projects, including a big-screen version of “The Book of Mormon.”

On Friday, Mr. Parker and Mr. Stone were putting together the final news release to announce their studio. They settled on this quip: “Having worked with several different studios over the years, we came to realize that our favorite people in the world are ourselves.”

The pair will join a short line of Hollywood players who have formed their own studios as a way to gain control over the creative, production and distribution process.