Film & Television
Industry Alliance

Unknown Quantity

Sony Pictures Studios, 10202 W. Washington Blvd., Culver …

Unknown Quantity is a company with 1 production listed on Production List, most recently Castle (in development). Key staff on file include Jeff Arkuss (producer). Production List last updated this listing on August 10, 2026.

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1 Project1 StaffUpdated Aug 10, 2026

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About

Unknown Quantity is a feature film production company founded in January 2026 by screenwriter-producer Chris Bremner and veteran producer Jeff Arkuss, operating under a writing and producing deal at Sony Pictures. The company focuses on developing and producing commercial, high-concept feature films — including franchise IP and original specs — with a particular emphasis on broad audience appeal and discovering emerging writers. Since its launch, Unknown Quantity has rapidly set up multiple projects at Sony Pictures and Screen Gems, including Permission, You Up, White Knight, and Castle.

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Contact details for Unknown Quantity (address) are on file at Production List, last updated August 10, 2026, and are available to members. Direct contacts are also on file for 1 member of staff. Membership is $29.95 for the first month.

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Key Staff · 1

Contact info for members
J
Jeff Arkuss

Producer

Productions · 1

Castle
Feature Film
In development
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Source: Production List, published by the Film & Television Industry Alliance. Cite this page as https://www.productionlist.com/production-contact/unknown-quantity (last updated Aug 10, 2026).