Research and planning- Production company research

A production company provides the physical basis for works in the realms of the performing arts, new media art, film, television, radio, and video.
A production company is responsible for the development and filming of a specific production or media broadcast. In entertainment, the production process begins with the development of a specific project.  Once a final script has been produced by the screenwriters, the production enters into the pre-production phase, most productions never reach this phase for financing or talent reasons. In pre-production, the actors are signed on and prepared for their roles, crew is signed on, shooting locations are found, sets are built or acquired, and the proper shooting permits are acquired for on location shooting. Actors and crew are hand picked by the producer, director, and casting director, who often use collaborators or referenced personnel to prevent untrusted or unwelcomed people from gaining access to a specific production and compromising the entire production through leaks. Once a production enters into principal photography, it begins filming.
Here are some examples of production companies of a horror genre films because this is the genre we are doing for our horror genre trailor.