AGN International announces that Californian-based U.S. firm GCP Advisory LLP has joined its AGN Americas membership.
AGN International is one of the world’s leading associations of independent certified public accounting and consulting firms. We provide outstanding continuing professional education and intra-member collaboration to help all member firms serve clients with excellence and maintain adherence to the highest professional standards.

“We are thrilled to welcome GCP Advisory LLP in Los Angeles, California, to AGN. This high-end boutique firm provides tax, business management, and wealth advisory services to high net-worth individuals and entrepreneurs. With deep expertise, a multi-generational perspective, and a collaborative approach, they deliver exceptional, value-added service that aligns perfectly with AGN’s commitment to excellence and innovation. We look forward to connecting GCP Advisory with our global association and strengthening business impact across member firms.”
Malcolm Ward, Global CEO – AGN International
GCP Advisory LLP, based in California, U.S., was established in 2025 by Barry Gumerove, Matthew Cohen, and Ryan Perlman. GCP Advisory provides Tax Planning and Preparation, Financial Advisory and Consulting, Business Management/Family Office Support, and Strategic Solutions.

“We are excited to join AGN to further strengthen our firm through shared best practices, collaboration, and an elevated client and employee experience. Just as important, we look forward to building meaningful, long-term relationships with fellow AGN member firms as we grow and support one another together.”
Matt Cohen, Managing Partner & CO-Founder – GCP Advisory LLP
Firm Partners:
Matt Cohen
Managing Partner & CO-Founder
[email protected]
Connect on LinkedIn
Ryan Perlman
Partner & CO-Founder
[email protected]
Connect on LinkedIn

GCP Advisory LLP
1880 Century Park East, Suite 710
Los Angeles, CA 90067
Contact: Matt Cohen
Tel: 310.448.2294
Email: [email protected]
Web: https://gcpcpa.com/