OverviewSuggest Edit

    Proponent (formerly known as Kapco Global, Kirkhill Aircraft Parts) is an aircraft parts distribution company. It offers seat tracks, anchors, fittings, filters, indicators, switches, lighting, sensors, cables, fuel system components, seals, gaskets, cockpits, engines, and other products. The company also provides manufacturing and parts manufacturer approval (PMA) parts development, e-commerce, aircraft on ground (AOG) support, custom kitting, consignment, vendor consolidation, and other services.
    HQBrea, CA, US
    Employee Ratings3.9

    Latest Updates

    Employees (est.) (Apr 2022)296
    Cybersecurity ratingBMore
    Discover new suppliers and conduct deeper comparison analysis with Craft for EnterpriseLearn more
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    Key People/Management at Proponent

    Andrew Todhunter

    Andrew Todhunter

    President and Chief Executive Officer
    Steven Frields

    Steven Frields

    Chief Financial Officer
    John Valantine

    John Valantine

    Chief Information Officer
    Jeff Nixon

    Jeff Nixon

    Chief Commercial Officer
    Rodolph Italianer

    Rodolph Italianer

    Vice President Business Innovation
    Erik Krol

    Erik Krol

    Vice President Strategic Business Units
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    Proponent Office Locations

    Proponent has offices in Brea, Burnsville, Centerbrook, Tamarac and in 7 other locations
    Brea, CA, US (HQ)
    3120 Enterprise St
    Brea, CA, US
    3050 Enterprise St
    Burnsville, MN, US
    2999 County Rd 42 W # 132
    Centerbrook, CT, US
    1 Industrial Park Rd
    Tamarac, FL, US
    10601 State St #1
    Guangzhou, CN
    China Plaza, Yuexiu District
    Show all (12)

    Proponent Financials and Metrics

    Summary Metrics

    Founding Date


    Proponent Acquisitions / Subsidiaries

    Company NameDateDeal Size
    D+C-Airparts BatteryMay 30, 2017
    Aaxico Leasing, Inc.
    Aaxico Sales Disc, Inc.
    Aaxico Sales Inc
    Aaxico (southern Africa), Inc.
    Aaxico Technical Services, Inc.
    Avio-Diepen Inc.
    D + C Airparts Battery in Europe GmbH
    HK Aerospace Kirkhill Aircraft Parts Company
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    Proponent Cybersecurity Score

    Cybersecurity ratingPremium dataset



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    Proponent Online and Social Media Presence

    Embed Graph

    Proponent Blogs

    Proponent Signs New Spares Support Agreement with Joramco

    Press Release Brea, Calif., February 22, 2022 – At MRO Middle East, Proponent, the world’s largest independent aerospace parts distributor, and Joramco, a leading independent commercial aircraft maintenance, repair, and overhaul company, signed an agreement to support the supply of consumables and e…

    Understanding Air Filters and Covid

    During the current Covid-19 pandemic, it’s become extremely important to know the safety features airlines have in place for each flight. While it has always been worth knowing how often the planes are cleaned and air filters are changed, it has now become essential for anyone who is stepping on an …

    Borescope Inspection in Aviation: How to Choose a Borescope Camera

    The world’s first aircraft engine was a comparatively simple gasoline-powered, internal-combustion design. And while it provided enough power for the Wright brothers’ 1903 flyer to achieve the world’s first heavier than air, self-propelled flight, new advances in the burgeoning field of aviation qui…

    Materialise and Proponent Transform Aerospace Aftermarket Supply Chains with 3D Printing

    Press Release Brea, Calif., Materialise (NASDAQ: MTLS) and Proponent have today announced a partnership that will raise the profile of 3D printing in aerospace aftermarket supply chains. Proponent, headquartered in Brea, California, is the world’s leading independent distributor of aircraft parts. M…

    Aircraft Hydraulic Systems

    We’ve come a long way since Kittyhawk; modern aviation allows us to circle the globe, reach unimaginable altitudes, and remain airborne for amounts of time undreamt of by early flight pioneers. However, today’s aircraft systems also demand precision controls and responsiveness. Aircraft hydraulic sy…

    Proponent becomes AMP’s First Supplier Alliances Platinum Partner

    Press Release Brea, Calif., October 5, 2021 – Proponent, the largest global independent aerospace distributor, is pleased to announce its new status as a Platinum Partner for Airline MRO Parts (AMP), the industry leader in automated solutions for the buying & selling of aircraft C&E.  The AM…
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    Proponent Frequently Asked Questions

    • When was Proponent founded?

      Proponent was founded in 1972.

    • Who are Proponent key executives?

      Proponent's key executives are Andrew Todhunter, Steven Frields and John Valantine.

    • How many employees does Proponent have?

      Proponent has 296 employees.

    • Who are Proponent competitors?

      Competitors of Proponent include Wencor Group, Tyonek and STS Aviation Group.

    • Where is Proponent headquarters?

      Proponent headquarters is located at 3120 Enterprise St, Brea.

    • Where are Proponent offices?

      Proponent has offices in Brea, Burnsville, Centerbrook, Tamarac and in 7 other locations.

    • How many offices does Proponent have?

      Proponent has 12 offices.