proponent |prəˈpōnənt| Noun: an advocate; a champion; a supporter. Proponent is the new name for the combined company formed by Kapco Global, Avio-Diepen and their subsidiaries. With 115 years of collective experience supporting the MRO, OEM and commercial airline markets, Proponent is the world’s largest independent aerospace distributor. For us, proponent is a one-word mission statement. It represents the value we place on relationships and championing our suppliers, our customers, our employees and each other. We know you need a partner to deliver high-quality aircraft parts, global scale & partnerships, and reliable on-time performance — and these are important parts of our business. But we think you deserve more from your aerospace distributor. You deserve expertise, you deserve flexibility, you deserve creativity — you deserve a true partner. We are Proponent, and we work hard to be that partner. We’re invested in your success – literally! Proponent is proudly a 100% employee-owned company, with 600 staff operating out of 12 facilities in 8 countries across the globe. From the warehouse floor to the boardroom, we are working for you.