Mariana Hagström


Mariana Hagström is an attorney-at-law who focuses on M&A, commercial & corporate matters, competition law and IP. She has a long experience advising clients on issues related to private equity and investments. Mariana Hagström is co-author of the first book ever written on competition law in the Estonian language. She is the author of a number of publications and articles on corporate law and competition law.

Before establishing TEDER Law firm was a managing partner for Glikman Alvin & Partners for 6 years. Has extensive experience in M&A, cross-border corporate structures, corporate governance and commercial litigation, competition law.

A member of the Competition Committee of Estonian Bar Association. She is the author of numerous publications (including 2 books) on corporate and competition law.

The Legal 500 - The Clients Guide to Law Firms
The Legal 500 - The Clients Guide to Law Firms

Fields of Expertise

Competition Law
Banking & Finance, Project Finance, PPP
Company and Corporate Law
Intellectual Property

Professional Background

Member of the Competition Law Committee of the Estonian Bar Association (from 2015)
2004-2015 Attorney-at-Law at Glikman, Alvin & Partnerid, partner since 2005, managing partner since 2013
1998-2004 Attorney at Law Firm Teder & Rask, Lawyer until 1999
Member of the Estonian Bar Association since 19.01.1999


University of Tartu (1998)
Stockholm University LL.M (2001)


Marko Pikani, Erik Salur, Mariana Hagström, Rasmus Õisma – Corporate Acquisitions and Mergers 2016, Estonian  chapter – Kluwer Law International BV, Netherlands, 2016

Corporate Acquisitions and Mergers 2014-1, Estonian chapter. Kluwer Law International, 80 pages, with Kairi Kurisoo, Liina Rekand, Reesa Paatsi (2013)

Mariana Hagström, Risto Rüütel – Competition Law and Practice – Äripäev, Tallinn, Estonia, 2010

Mariana Hagström, Risto Rüütel, Indrek Teder – Competition Law for undertakings – Äripäeva Kirjastus, Tallinn, Estonia, 2006


CMS Guide to Merger Control in Europe 2014, Estonian chapter. CMS Legal Services EEIG, p 40-41. (2014)


Estonian, English, Russian, Swedish