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Allen & Overy LLP
52 avenue Hoche

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  Marie Stoyanov



Marie specialises in international arbitration. She has a broad range of expertise with a particular focus on treaty and other investment disputes, particularly in the energy, power and resources sectors. She has advised and represented clients in numerous bilateral investment treaty and ECT claims under the ICSID and UNCITRAL Arbitration Rules, as well as in ICSID annulment proceedings. She has also advised various clients on how best to structure their investment in Eastern Europe, Asia and Africa in order to take advantage of protections offered by investment treaties and foreign investment laws.

Marie sits as an arbitrator herself and has spoken regularly about arbitration. She is also a member of the Advisory Board of Investment Claims, published by Oxford University Press. Marie graduated from ESSEC, an AACSB-accredited business school, in 1997 and is a French avocat. Marie speaks fluent English and German and has good working knowledge of Spanish.

Marie was awarded "Star of tomorrow" distinction by Les Echos 2017

"Marie Stoyanov is 'very sharp in understanding and reaching the crux of even the most complicated issues'." Chambers and Partners, dispute resolution: international arbitration — France 2017

"Marie Stoyanov is described as 'an outstanding, talented lawyer'." Chambers and Partners, dispute resolution: international arbitration — France 2016

Published work

Sentence Micula : un tribunal condamne la Roumanie à payer 250 millions de dollars,, April 2014, written with Sebastiano Nessi

Enjeux et portée de la sentence Micula, Capital Finance, March 2014, written with Sebastiano Nessi

Interview - « Dès qu’un pays devient exportateur de capitaux, il est enclin à se porter vers l’arbitrage », Capital Finance, n° 1125, october 2013

Third-Party Funding in International Arbitration : Is it time for Some Soft Rules?, International Arbitration Review, June 2015, written with Olga Owczarek

Multiparty Proceedings and Mass Claims, The Investment Treaty Arbitration Review, April 2016, written with Jeffrey Sullivan and Lucia Raimanova

Procedural interplay between investment arbitration and criminal proceedings in the context of corruption allegations, b-Arbitra, 2018, written with Werner Eyskens, Valentin Bourgeois and Michaël Fernandez-Bertier

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