The Caddo Company, Incorporated series (1922-1965) is comprised of twelve sub-series containing film production and corporate records.

The first two sub-series contain materials related to two films that predate the formation of The Caddo Company, Incorporated as a production company, Swell Hogan (1926) and Everybody's Acting (1926), financed by Howard Hughes. The remaining sub-series represent the nine films produced under the Caddo banner and general corporate records.

Materials within each film sub-series include advertising and publicity, administrative, censorship, distribution, editing, financial, legal, and production and direction records, as well as film soundtracks and screenplays. Types of materials include of ledgers, correspondence, storyboard images, sheet music, and original scores, as well as film, direction, set, and production stills. Corporate records consist of newspaper clippings, administrative correspondence, actor and distribution contracts, and financial reports.

The Hell’s Angels sub-series (1922-1965) contains material related to the development, production, and post-production of The Caddo Company film, Hell’s Angels. Both the silent and sound versions of the film are represented in the materials.

Materials include contracts and lawsuits, correspondence, financial, story development, and production and direction records, editing and special effects, aviation logs, and advertising, as well as musical scores for the silent version composed by Adolph Tandler and the sound version composed by Hugo Riesenfeld. Also included are black-and-white photographic prints and negatives and twenty-four miniature airplane models.