Our law firm

von ILSEMANN | HELMS is a boutique law firm with main office in Hamburg's Hafencity specialized in corporate and commercial law consultancy of national as well as international companies. Based on their consulting experience of (combined) 30 years gained in leading international law firms and law boutiques von ILSEMANN | HELMS knows the legal requirements and challenges of the modern business world in particular with respect to small and medium-sized enterprises.
von ILSEMANN | HELMS represents the highest standard of consulting quality in connection with personal engagement for a target-oriented and efficient realization of the clients' goals pursued with creativity, entrepreneurial thinking and passion.

With a global network of highly qualified legal experts and consultants in other fields von ILSEMANN | HELMS is able to offer its clients custom-tailored and multidisciplinary solutions. As advisor as well as independent and reliable contact partner von ILSEMANN | HELMS is available for its clients at any time.


von ILSEMANN | HELMS combines an extensive consulting expertise in all areas of corporate and commercial law including M&A transactions and litigation before state courts as well as courts of arbitration.

Corporate / M&A

Corporate / M&A

  • Sale and Purchase of companies and shareholdings
  • Cooperations (Joint Ventures)
  • Legal Due Diligence
  • Company foundations and corporate structuring
  • Transformations and restructuring (mergers, change in legal form etc.)
  • Capital measures
  • Shareholder meetings and shareholder resolutions
  • Shareholder agreements and contracts of participation
  • Startups
  • Management participations (MBO / MBI)
  • Financing rounds
  • Shareholder disputes
  • Market entry of foreign companies in Germany
  • Company and corporate succession



  • Full service of an (outsourced) legal department
  • All sorts of business contracts and agreements, in particular (framework) purchase and supply contracts, work and service agreements, machine/plant engineering and construction contracts, research and development agreements, IT agreements
  • General terms and conditions (domestic and cross-border)
  • International supply and service agreements (including CISG, UNIDROIT principles, Orgalime, Incoterms etc.)
  • Warranty rights and liability law, product and manufacturer’s liability
  • Right of sale, in particular with respect to commercial agents and authorized dealers
  • Digitalization (including IoT/M2M), webshop support
  • Tenancy law (commercial premises)
  • Contract management, standardization of legally relevant business processes
  • Trainings (in-house, at our offices, online)
  • Litigation (before state courts as well as courts of arbitration)

Compliance / Legal-QM

Compliance / Legal-QM

  • Optimisation and standardisation of business processes focusing on legality combined with efficiency and practicability
  • Assignment of duties and delegation of authority
  • Verification and optimisation of Compliance risks, focused individually or within a Compliance (and/or Risk) Management System
  • Compliance Management under consideration of Quality Management and Controlling
  • Prevention of and guidance in case of violations of Compliance
  • D&O liability, D&O insurance
  • Trainings (in-house, at our offices, online)
  • Contract management
  • “Legal cadaster” (inventory of legally relevant provisions)
  • Legal-QM (legal elements of Quality Management)
  • Support in the context of (re-)certification of CM-/QM Management Systems


Julian von Ilsemann

Julian von Ilsemann's practice is in the fields of corporate law and M&A transactions. He advises domestic and foreign companies and entrepreneurs on company formations and transformation measures as well as on shareholders' meetings and capital measures. Furthermore, Julian von Ilsemann's practice focuses on the sale and purchase of companies and participations a well as on corporate co-operations (Joint Ventures).

Julian von Ilsemann was admitted to the bar in 2006. After completing his studies and legal training in Hamburg, The Hague and Cape Town, he initially worked as a lawyer at the Hamburg office of the international law firm White & Case LLP (Corporate/M&A practice group) from 2006. In 2010, he joined the boutique law firm Corinius LLP, where he was responsible for the Corporate/M&A practice group as an equity partner from 2015 to 2019.

T +49 40 228589992
M +49 151 53850499

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Gunnar Helms, LL.M. (Durham)

Gunnar Helms primarily advises small and medium-sized companies in all legal matters of their daily business operations. Hereby he possesses particular expertise because of his experience as an in-house counsel (Secondment at Siemens AG, Mechanical Drives, today Flender GmbH). Also, Gunnar Helms represents companies during disputes before state courts and courts of arbitration and advises in the area of company organisation, especially under consideration of the requirements for Compliance and Quality Management Systems. Further, he advises in the field of M&A, was involved in numerous notable M&A transactions (domestic and cross-border) and takes care of the clients’ corporate housekeeping. Gunnar Helms is consistently active as a speaker and i.a. member of the German Society for Quality (DGQ) as well as of the International Association of Controllers (ICV) and there he is head of the work group "Compliance-Management & Controlling".

Since 2004 Gunnar Helms is practicing law, since 2007 as a fully qualified German lawyer. After studying law in Hamburg and Durham (England, LL.M.) with emphasis in commercial and corporate law, including postgraduate degree programs in business and European law at the universities of Hamburg and Durham, he worked as a lawyer for a boutique law firm (spin-off from Freshfields Bruckhaus Deringer). As an equity partner since 2014 he there was in charge of the Commercial law practice group before founding von ILSEMANN | HELMS.

T +49 40 228589998
M +49 170 7692876

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