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Armelle Sandrin-Deforge's practice focuses on French, European, and international environmental law, including energy, health and safety, and regulatory issues. Her experience covers industrial facilities, contaminated sites, waste, renewable energy, climate change, marine and coastal environmental issues, asbestos, and Legionella. She advises on regulatory and litigation matters. Armelle has extensive experience in environmental issues related to M&A, particularly in environmental audits, environmental representation, and warranties. She also provides services to French and international clients with respect to environmental and sustainable development reporting in connection with capital markets transactions.

Armelle is particularly involved in the life science and pharmaceutical industries and is part of the Firm's multidisciplinary team that works to anticipate and respond to the new challenges facing this sector. She has represented major manufacturers, distributors, and users of medical devices, products, and services in transactional, regulatory, enforcement, and litigation matters in the life science area.

Armelle is the author of numerous publications on environmental and energy law. She teaches a renewable energy course at the University of Paris V-René Descartes and participates in environmental law and life science conferences. She is a member of the France Fulbright Alumni Association.


  • Gilbert Dupont; Joh. Berenberg, Gossler & Co. KG; and Portzamparc complete IPO of BoostheatJones Day advised Gilbert Dupont; Joh. Berenberg, Gossler & Co. KG; and Portzamparc, as joint global coordinators, joint lead managers, and joint bookrunners, in connection with the initial public offering of Boostheat SA, a designer, developer, and producer of technologically advanced, energy efficient, and sustainable heating solutions, on the regulated market of Euronext in Paris.
  • Voltalia completes €376 million capital increase with shareholders’ preferential subscription rightsJones Day represented Voltalia S.A. in connection with its €376 million offering by way of preferential subscription rights allocated to Voltalia's existing shareholders in a public offering in France and internationally in private placements to institutional investors.
  • Garmin® acquires Tacx, the leading manufacturer of indoor bike trainersJones Day advised Garmin Ltd. in its acquisition of the Tacx group, a Dutch family business that designs and manufactures high end indoor bike trainers, tools and accessories, as well as indoor training software and applications.
  • SVB Leerink, Barclays, Bryan Garnier, and Natixis underwrite $155.4 million Nasdaq IPO by GenfitJones Day acted as French counsel to the underwriters, led by SVB Leerink and Barclays, as global coordinators, and Bryan Garnier and Natixis, as European bookrunners, in connection with the initial public offering of Genfit S.A., a French Euronext Paris-listed biotechnology company on Nasdaq for a total aggregate amount of $155.4 million, after full exercise of the over-allotment option.
  • UPL acquires Arysta LifeScience from Platform Specialty Products Corporation for $4.2 billionJones Day advised UPL Limited ("UPL"), a leading global generic agrochemical company based in India, in connection with its subsidiary, UPL Corporation Limited’s, US$4.2 billion acquisition and related $3 billion term financing of Arysta Lifescience Inc. (“Arysta”), a global provider of crop protection solutions, including bio-solutions and seed treatment, from NYSE listed Platform Specialty Products Corporation (“Platform”).
  • Creadev invests in InnovaFeedJones Day represented Creadev and Temasek in connection with their investment in InnovaFeed, a biotech company producing high quality insect meals for the feed industry.
  • Huadong Medicine announces £169 million (US$222 million) takeover offer for and acquisition of Sinclair Pharma PlcJones Day advised Huadong Medicine Co. Ltd. ("HMC") and its subsidiary, Huadong Medicine Aesthetics Investment (HongKong) Limited ("Huadong"), on Huadong's takeover offer for and acquisition of Sinclair Pharma Plc with a total value of approximately £169 million (US$222 million).
  • Aurora Resurgence sells Alltub Group to One Equity PartnersJones Day advised Aurora Resurgence in the sale of portfolio company Alltub Group to One Equity Partners.
  • Etablissements Geyer Fréres sold to Royal Unibrew for DKK 660 million (US$103.7 million)Jones Day advised the main shareholders of Etablissements Geyer Fréres in their sale of the company, which owns the brands LORINA craft lemonade, PureThé and InFreshhh with focus on organic, local products, to Royal Unibrew A/S.
  • Safran completes €8.7 billion agreed tender offer targeting Zodiac Aerospace's shares creating global leader in aircraft equipmentJones Day represented Safran in connection with its €8.7 billion agreed tender offer targeting Zodiac Aerospace's shares to create a global leader in aircraft equipment.
  • Petrosen SA participates in joint development of natural gas in the Greater Tortue fieldJones Day is representing Société des Pétroles du Sénégal (Petrosen SA), the national oil company of Senegal, in connection with the unitisation of the large accumulation of natural gas under the deep waters offshore Mauritania and Senegal (Greater Tortue field).
  • Lincoln Electric acquires Air Liquide Welding for €115 million (US$134 million)Jones Day advised Lincoln Electric Holdings, Inc. in the €115 million (US$134 million) acquisition of the Air Liquide Welding subsidiary of Air Liquide, a key player in the manufacturing of welding and cutting technologies.
  • Total sells Atotech to The Carlyle Group for $3.2 billionJones Day advised Total in the $3.2 billion sale of specialty chemical affiliate Atotech B.V., a global manufacturer of high technology plating solutions, to The Carlyle Group.
  • La Banque Postale finances four wind farms in Meuse, Loire-Atlantique, and AveyronJones Day represented La Banque Postale in connection with the €80 million (US$96 million) project financing for the development, design, construction, and operation of a portfolio of four wind farms with an aggregate target capacity of 50 MW located in Meuse, Loire-Atlantique and Aveyron and sponsored by Quadran, one of the key players in the renewable energy field in France.
  • Ferro acquires Cappelle PigmentsJones Day advised Ferro Corporation in connection with the acquisition of all the shares of Belgium-based Cappelle Pigments NV.
  • Henderson Park buys Le Méridien Etoile Hotel, the largest hotel in Paris, for €365 million (US$392 million)Jones Day advised Henderson Park Real Estate Fund I on its acquisition and first mortgage financing of Le Méridien Etoile Hotel, the largest hotel in Paris, which was sold by a partnership of Mount Kellett Capital Management and Cedar Capital Partners, for €365 million (US$392 million).
  • Calgon Carbon acquires Arkema's activated carbon and filtration media business for €145.5 million (US$160.1 million)Jones Day advised Calgon Carbon Corporation in the €145.5 million (US$160.1 million) acquisition of the wood-based activated carbon, reactivation, and mineral-based filtration media business of CECA, a subsidiary of Arkema, a French leading specialty chemicals and advanced materials company.
  • Wabtec acquires Gerken GroupJones Day advised Wabtec Corporation in its acquisition of Gerken Group SA, a leading manufacturer of specialty carbon and graphite products for rail and other industrial applications.
  • Bridgestone acquires Speedy FranceJones Day advised Bridgestone EMEA in its acquisition of Speedy France, a leading car service retail company and one of the most important tyre networks in France.
  • Alcon sells Kaysersberg Pharmaceuticals to RecipharmJones Day advised Alcon, a Novartis company, in its sale of Kaysersberg Pharmaceuticals to Recipharm AB.
  • Speaking Engagements

    • 12 avril 2018
      Finale de la 4ème édition du Prix Jones Day/Paris II/ESSEC
    • November 9, 2016
      Jones Day Global Life Sciences Conference – 2016 Issues & Trends
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