UNIONDALE, NY / ACCESS Newswire / September 30, 2025 / Marquis Who's Who honors Joannis "John" Argyriou for his excellence in finance and his forward-looking efforts to extract valuable resources from ocean water. With more than two decades of experience in global markets and venture capital, Mr. Argyriou has combined financial expertise with a drive to develop sustainable technologies that challenge conventional practices.

About Joannis "John" Argyriou

Mr. Argyriou is the owner and managing director of Bellerophon Investment Management Ltd., a venture capital company he has led since 2002. Under his direction, Bellerophon operates mining projects and is building a plant designed to extract chemicals and minerals from ocean water, while additionally serving as a desalination facility. He also serves as the chief investment officer of OneCycle Group, where he oversees investment strategies and guides high-level financial operations. His work reflects a commitment to creating long-term solutions that defy short-term market trends, emphasizing innovation over quick profits.

Earlier in his career, Mr. Argyriou developed a deep foundation in financial markets. He worked as the chief operating officer of Curve Capital Ventures Ltd. from 2008 to 2015 and held leadership roles at Yamaichi International (Europe) Ltd., including head of repurchasing, arbitrage and futures fixed income. He gained early experience as a repurchasing agreement trader at Steinhardt Capital Management LLC and as a fixed-income sales associate at Salomon Brothers Inc., where he began his career in 1983. These positions provided him with a broad understanding of derivatives, fixed income and commodities, enabling him to maneuver complex markets and seize opportunities for growth and innovation.

Academically, Mr. Argyriou earned a bachelor's degree in finance and economics from Pace University's Lubin School of Business and a master's degree in finance at the University of Arizona, where he has been recognized for academic excellence with an invitation to join Sigma Beta Delta, a business honor society. Additionally, he holds professional certifications, including Series 6, 7, 24, 32 and 63, as well as FSA credentials in the United Kingdom and Europe.

A Commitment to Leadership and Innovation

Beyond his professional pursuits, Mr. Argyriou remains committed to service and personal growth. He is a trustee at King's Hospital, London, and a member of the European Raw Materials Alliance. He also previously coached American football in the United Kingdom and enjoys playing golf, studying geopolitics and collecting firearms as hobbies.

Mr. Argyriou's achievements have earned him recognition for both leadership and innovation. He has played a key role in policy discussions with central banks while seeking evidence-based solutions to global challenges. Guided by the principle of never allowing others to limit his ambitions, he remains dedicated to building technologies and financial strategies that last. His mission remains the same: to prove that vision and persistence can drive meaningful change in an increasingly shortsighted market.

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SOURCE: Marquis Who's Who