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Distinct shells carrying a filed role for this person — not every shell they have ever touched.
Of those vehicles, the ones that closed a merger.
Announced but not closed, and still hunting.
No closed vehicle here has both a stored price and a filed trust value to score it against.
1 vehicle on file, newest listing first
none appears on more than one
Arthuros Mangriotis is a New York-based financial executive and investment professional who currently serves as Chief Financial Officer, Chief Accounting Officer, Executive Director, and Secretary of CH4 Natural Solutions Corporation (NYSE: MTNE), a special purpose acquisition company (SPAC) focused on identifying target businesses with significant real-asset footprints that may benefit from accelerated methane mitigation initiatives at scale. He has held these roles since November 2025, guiding the company through its initial public offering process. CH4 Natural Solutions priced its $200 million IPO on April 30, 2026, listing 20,000,000 units on the New York Stock Exchange under the ticker symbol MTNE.U, with Santander serving as sole bookrunning manager. The SPAC is sponsored by CH4 Natural Solutions Acquisition Sponsor LLC, an affiliate of Riverstone Earth LLC, and its sponsor group includes David M. Leuschen (co-founder and Senior Managing Director of Riverstone), Impact Ag, and Lauren Singer (co-founder and Managing Partner of Overview Capital). Mangriotis also serves as the authorized person for CH4 Natural Solutions Acquisition Sponsor Manager, LLC, through which he has been involved in insider transactions including a reported purchase of 200,000 shares in May 2026.
Prior to joining CH4 Natural Solutions, Mangriotis built a approximately 23-year career spanning investment management, research, and advisory roles across several prominent firms. Most recently, he served as Chief Investment Officer at Riverstone Earth, a New York-based firm that is an outgrowth of Riverstone Holdings LLC and applies a disciplined approach to nature-based systems in agriculture, land management, and related energy and industrial supply chains. Before that, he was an Investment Analyst at Jericho Capital Asset Management L.P. from January 2022 to January 2025. From August 2019 to July 2021, he held the position of Vice President at Sandler Capital Management. He served as Managing Director at Yarra Square Partners LP (formerly Sutton Square) from September 2016 to August 2019, and prior to that was a Consultant at Blue Ridge Capital from July 2015 to July 2016. Earlier in his career, he was Managing Director at Fox Point Capital Management from July 2006 to September 2014, and began his professional journey as an Analyst at WM Partners from June 2003 to July 2006.
Mangriotis holds a Master of Business Administration from Columbia Business School, completed between 2001 and 2003, and a Bachelor of Arts from the University of Oxford. His extensive experience across hedge funds, private equity, and real-asset investing has positioned him as a key figure in the CH4 Natural Solutions leadership team, working alongside CEO and Chairman David M. Leuschen and a board of directors that includes Jeffrey H. Tepper, Dr. Nate Zwald, Dr. Jean Rogers, Lauren Singer, and Ben Veres. The company is headquartered at 712 Fifth Avenue in New York, NY 10019, and Mangriotis serves as a primary investor contact, reachable at info@mtne.co and 212-993-0076. His multifaceted role at CH4 Natural Solutions encompasses financial oversight, accounting governance, corporate secretariat duties, and executive board responsibilities, making him central to the SPAC's operations as it pursues a business combination in the agriculture, land management, and methane mitigation sectors.
This record is keyed to SEC CIK 0002108758 — the identifier this person files under in their own name. Every vehicle above is a filing made under that CIK, so “the same person on two shells” is a fact about an SEC identifier rather than about a name that happens to match.
Roles are the strings the filings used, in the order they were filed. Nothing on this page ranks them, infers seniority, or offers a reason why any two of these names recur — a recurrence is a count, and the filings that produced it are linked beside every row. We also hold 6 institutional-holder rows on these vehicles, under 6 distinct name strings, and none of them is counted across vehicles: that table has no CIK column, and matching holders by name would merge firms that are not the same firm.