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Jelmer Kalisvaart focuses his practice on corporate law, capital markets and mergers and acquisitions, including initial public offerings (IPOs), secondaries, rights offerings, convertible and debt securities, and public takeover bids, SPAC transactions, venture capital, private equity and joint ventures. Jelmer has more than 15 years’ of experience advising listed and private companies, underwriters, multinationals, private equity houses and hedge funds on a wide range of domestic and cross-border transactions as well as on securities regulations and corporate governance. He gained in-house experience advising on Corporate Finance and ECM matters at a large Dutch Bank. In addition, Jelmer lectures frequently on corporate and capital markets topics at Dutch universities. Jelmer is recognized for his dedication to clients and the deal. He offers clients pragmatic and strategic legal advice and ensures that transactions are handled to the very highest standards.


  • Equity capital markets
  • Mergers & Acquisitions
  • Securities regulations
  • Debt capital markets
  • Private equity



  • Representing The underwriters of Pharvaris N.V., a clinical stage biopharmaceutical company focused on the discovery, development and commercialization of innovative therapies, in respect of its IPO on the Nasdaq Global SelectMarket.
  • Representing Oppenheimer & Co. Inc. as underwriter and a major investor in connection with a private placement of shares and warrants of Kiadis Pharma N.V., a biopharmaceutical company listed on Euronext Amsterdam and Euronext Brussels.
  • Representing InterXion Holding N.V., a provider of carrier and cloud neutral colocation data centre services, listed on the NYSE, in respect of an underwritten public offering and listing of shares at the NYSE.
  • Representing Digital Turbine, Inc. on its acquisition of Fyber N.V., listed on the Frankfurt Stock Exchange, through a block trade followed by a mandatory offer.
  • Representing InterXion Holding N.V., listed on the NYSE, a leading European provider of cloud and carrier-neutral colocation data center services, in a business combination with Digital Realty, a leading global provider of data center, colocation and interconnection solutions.
  • Representing A consortium, including PAI Partners SAS and British Columbia Investment Management Corporation in respect of its voluntary public offer for all shares in Refresco Group N.V., listed on Euronext Amsterdam.

Recognition & Leadership

  • Recognized & Ranked Individual, The Legal 500 EMEA, Capital markets: Equity-Netherlands, 2020-2023
  • Member, Dutch Bar Association


  • Post Graduate Degree, Mergers & Acquisitions, Grotius Academy
  • LL.M., Erasmus University Rotterdam
  • Amsterdam
  • Dutch, Native
  • English, Fluent