{"id":1325,"date":"2026-02-02T18:13:58","date_gmt":"2026-02-02T17:13:58","guid":{"rendered":"https:\/\/erya-legal.com\/?page_id=1325"},"modified":"2026-02-05T18:07:43","modified_gmt":"2026-02-05T17:07:43","slug":"home","status":"publish","type":"page","link":"https:\/\/erya-legal.com\/fr\/","title":{"rendered":"Homepage"},"content":{"rendered":"
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Cabinet sp\u00e9cialis\u00e9 en Droit et R\u00e9glementation Bancaire et Financi\u00e8re<\/h1>\n\n\n\n
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Fond\u00e9 par et pour les professionnels de march\u00e9<\/p>\n\n\n

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Equipe<\/a><\/div>\n\n\n\n
Expertise<\/a><\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n
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\"Gr\u00e9gory<\/figure>\n<\/div>\n\n\n\n
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Gr\u00e9gory das Merc\u00eas<\/h2>\n\n\n\n

Avocat – Barreau des Hauts de Seine<\/em><\/p>\n<\/div>\n<\/div>\n\n\n\n

\"Allier excellence juridique et r\u00e9glementaire et une expertise op\u00e9rationnelle.\u201d
with front-line financial markets expertise<\/h3>\n\n\n\n
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Greg\u2019s career has been built at the crossroads of financial regulation<\/em>, operations<\/em> and investment management<\/em>. This background gives him a rare, 360-degree understanding of how rules, risks and business realities interact.

At Euronext<\/em>, he helped design key regulatory frameworks, combining technical insight into trading mechanisms with policy expertise. He eventually headed the Exchange\u2019s Market Surveillance<\/em> department, gaining first-hand exposure to market integrity and supervision in practice. He later joined Natixis<\/em>, first as Compliance Officer<\/em>, then as Head of Compliance for Equity Markets<\/em>. There, he worked closely with trading and structuring teams to align innovation with regulatory expectations. His understanding of business drivers also led him to collaborate directly with front-office teams, contributing to the design, promotion and delivery of transactional services<\/em>.This path ultimately led him to create and manage his own hedge fund and AIFM<\/em>, gaining direct experience in investment management, risk oversight, capital formation and distribution.

Over time, he has built deep, front-line expertise across the full lifecycle of regulated activities \u2014 from policy drafting<\/em> and complex entity structuring<\/em> to enforcement actions<\/em> (AMF\/ACPR\/CSSF), litigation and remediation. Known for his ability to translate complex regulatory and technical concepts into practical, operationally sound solutions<\/em>, he brings a pragmatic understanding of how financial systems truly function.

In recent years, his personal investment and advisory work have broadened his focus toward the technological dimension of modern economies<\/em>. He explores how data<\/em>, automation<\/em>, blockchain<\/em> and AI<\/em> reshape not only finance, but the way organisations operate and innovate.<\/p>\n\n\n\n

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Technical Expertise<\/strong><\/p>\n\n\n\n

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