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Dr Stefan Prochaska

Work +43 1 714 24 40
PHH Rechtsanwälte

Work Department

Business law in particular Mergers & Acquisitions, Private Equity and Real Estate transactions; Financing and Reorganization of investments; Strategical advice and Restructuring; Projectmanager.


Attorney at law and founding partner of PHH Prochaska Havranek Rechtsanwälte.


Since 2011 Board Member of Buy-Out Central Europe II BeteiligungsInvest AG; since 2008 Disciplinary lawyer at the federal association of expert witnesses in Vienna, Lower Austria and Burgenland; 2008-2015 Vice-President of the Vienna Bar Association; 2007-2008 Chairman of Duktus S.A. (formerly Pipe and Pile International S.A.); 2006-2008 Member of the Executive Committee of the Vienna Bar Association; 2005-2007 Chairman of the board of SPOT Special Opportunities Beteiligungen AG; since 1999 Member of AIJA (Association of Young Advocates); 1998-2002 Lecturer for European- and Business Law at the University of Applied Sciences for European Business Management; 2001 Founding Partner of Prochaska & Partner Rechtsanwälte; 1997-2001 Partner at Lansky & Prochaska Rechtsanwälte and since 1997 Member of the Vienna Bar Association.


German, English.


He acts as member of several supervisory boards and advisory boards as well as private foundations' boards of directors.


PhD in law from the University of Innsbruck (Dr. iur.).


Dispute resolution: commercial litigation

Within: Dispute resolution: commercial litigation

Recognised for its 'profound knowledge', PHH Rechtsanwälte represents clients in commercial, corporate and financial litigation and has been increasingly active in shareholder disputes, while also handling proceedings involving white-collar crime such as cybercrime and business espionage allegations. Stefan Prochaska, who jointly heads the team with Mathias Preuschl, has 'a brilliant track record' and acted for the founders of the real estate company Wienwert Group in a payment dispute with its board of directors.

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Dispute resolution: white-collar crime (including fraud)

Within: Dispute resolution: white-collar crime (including fraud)

PHH Rechtsanwälte is adept at handling internal investigations and defence proceedings for individuals, companies and financial institutions. Team head Mathias Preuschl represented an international businessman against allegations of bribery and corruption concerning an arms deal and Stefan Prochaska acted for a judge at the Supreme Court for Commerce in Kiev and his ex-wife in criminal proceedings pertaining to suspected money laundering in Liechtenstein and Austria.

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Legal Developments in Austria

Legal Developments and updates from the leading lawyers in each jurisdiction. To contribute, send an email request to

    On 5th December 2018, the Austrian data protection authority ( Datenschutzbehörde , "DSB") issued a decision (DSB-D123.270/0009-DSB/2018) on data subject's right to data deletion according to Art 17 GDPR. In a nutshell, the DSB accepted consistent anonymisation as a valid alternative to physical and technical deletion. Beside the clear statement that anonymous data is not subject to the GDPR, the DSB provided detailed information on (technical) requirements of anonymisation methods:
    - Dorda
  • Consent or pay – a valid scheme under the GDPR?

    Media companies throughout Europe struggle with a difficult economic environment: Shrinking sales figures for print products, the digitalisation and consumer demand force publishers to offer their content also on the internet. However, generating money for online publications is not quite easy as – at least in Austria – online subscription against renumeration has not been well accepted by customers. This partially has its root in the lack of suitable micropayment means in the past and users thus getting acquainted to online information being offered for free. Thus, publishers have instead focused on financing their platforms by online marketing activities such as placement of banners. Nowadays such digital advertisement is usually targeted to the specific user. For this purpose, cookies are stored on the user's computer upon his first visit of the website, which then collect data about his location, technical equipment used and online behaviour. This finally allows to display specific, user targeted advertisements. However, such cookies may cause issues with applicable consent requirements under the telecommunication and data protection regulations:
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  • fwp expands know-how thanks to new junior partner

    Vienna, March 2019. Fellner Wratzfeld & Partner GmbH (fwp) adds valuable competence and expertise to the team by welcoming Pavel Bachleda in its midst as a new attorney-at-law and junior partner.
  • fwp helps find a new mega arena location

    fwp helps find a new mega arena location

    Processing operations subject to the requirement of a data protection impact assessment.
    - Dorda
  • Rien ne va plus!

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  • DORDA advises on the acquisition of Austrian office properties Denk Drei

    Stefan Artner , Partner and Head of the Real Estate Practice Group, and real estate attorney Klaus Pfeiffer of DORDA advised Austrian Real Estate Development GmbH ( ARE , a subsidiary of Bundesimmobilien-Gesellschaft, the Austrian privatization agency) on the acquisition of the Denk Drei office properties from IC Development . The successful closing of the forward purchase transaction took place on April 30, 2018. The parties have agreed not to disclose the purchase price.
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  • Austrian "White List"

    Exceptions from the OBLIGATION TO CARRY OUT A data protection impact assessment
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  • Stop! Wait! Move! – No longer Stamp Duty for Residential Homes

    On 12 October 2017, right in a last minute attempt to win undecided voters for one of the political parties, the leaving members of parliament enacted a new tax law. While fundamental changes to the Austrian Tenancy Law had been vividly discussed between the socialist and the conservative parties in recent years, the new law on the abolition of stamp duty falls completely short of what could have been achieved.
    - Dorda
  • European Court of Human Rights: Employers have limited rights to monitor employee communications at

    A landmark decision was issued yesterday (Judgement Bărbulescu v. Romania), a source of debate in the media , in which the European Court of Human Rights clarified the restrictions on monitoring employees in the workplace.