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King & Spalding LLP

Work +49 69 257 81 10 00

Mario Leissner

Work +49 69 257 811 020
King & Spalding LLP

Work Department

Mario Leissner is Managing Partner and a founder of the firm’s German office in Frankfurt am Main, and a partner in King & Spalding’s Real Estate Practice Group.


With over 15 years of experience, Mr. Leissner specializes in international and German real estate transactions, regulatory and investment law as well as fund structuring. His practice also focuses on international taxation, corporate and financing work. Mr. Leissner represents: major investment management companies, open-ended and closed-ended real estate investment funds, institutional real estate investors and real estate companies in their legal, regulatory and tax structuring and in all aspects of their worldwide acquisitions, financings and sales; non-German/non-European investors in all aspects of their inbound investments in German/European real estate.


German (mother tongue) English (business fluent) French (business fluent) Russian (fluent) Italian (conversant) Spanish (conversant).


Bundesrechtsanwaltskammer (German Bar Association) Rechtsanwaltskammer Frankfurt am Main (Frankfurt Bar Association) Deutscher Anwaltverein (German Lawyers’ Association) Examination Board for Tax Consultants at the Ministry of Finance of the State of Hessen.


Law School: University of Potsdam: 1990 - 1994 Legal Clerkship (inter alia Chicago, IL and San Diego, CA): 1995 - 1997 Studies of Administrative Law: University of Speyer: 1996 Studies of Tax Law: Tax Law School of Freiburg/Breisgau: 1999 Admission to Bar: 1997.

Germany: Banking and finance

Investment funds

Within: Investment funds

The Frankfurt-based team at King & Spalding LLP is a respected player in the market for real estate investment fund work, acting for asset management companies, institutional investors and fund platforms on the structuring, launch, management, restructuring and liquidation of investment funds, while also providing advice on real estate-related regulatory matters. As another key area of expertise, it also represents investment funds in litigation and arbitration. Team head Mario Leissner advised Barings Real Estate Advisers on regulatory and structuring matters concerning new funds and the sale of existing products in Germany. As another highlight, he acted for Beos, which exclusively instructs the firm with all its regulatory and fund matters, on the structuring and creation of a new fund product for institutional investors as well as on the structuring and establishment of an asset management company, including licensing procedures and various transactions. BMO Real Estate Partners receives regular investment law advice, and Hannover Leasing routinely instructs the practice with regulatory issues alongside fund structuring, restructuring and product listing matters. Other noteworthy work includes assisting Savills Investment Management with the structuring, launch, management and liquidation of various funds, products and vehicles alongside advice on investment law and supervisory law issues. In early 2018, real estate law expert Sven Wortberg moved to Herbert Smith Freehills Germany LLP.

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