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Siri Teigum Partner Advokat (H)

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+4723111121 +4790912355 ste@thommessen.no Download vCard Oslo
Siri heads Thommessen’s practice area of EU/EEA and Competition Law, including state aid and public procurement. She assists clients in negotiations and dispute resolution, and is top ranked within these areas. She has been responsible for the clearance of a number of complex mergers and acquisitions. She has handled different types of EEA and competition cases before the EFTA, CJEU and Norwegian courts. She also acts as an arbitrator. She is, among other things, leader of the board of The Government Pension Fund Norway and member of the board of Gyldendal ASA.

  1. The Legal 500
    Hall of Fame, EU and Competition

    ‘Siri Teigum is outstanding.’
    ‘Siri Teigum combines high integrity with a calm and professional style. She is service minded and has a hands-on approach. Always available at short notice and efficient.’

  2. The Norwegian Financial Daily's annual Lawyer survey
    1st Place, Competition Law

  3. Chambers & Partners Europe
    Band 1, Competition/Antitrust

    "She is the number-one competition lawyer in Norway."
    "She is the queen of the market."

  4. Who's Who Legal
    Recommended, Competition

  5. Who's Who Legal
    Thought Leader / Recommended, Competition

  6. Who's Who Legal
    Recommended, Government Contracts

  1. Partner, Oslo, Thommessen

  2. Associate, Oslo, Thommessen

  3. Legal secretary, Siri assisted the EFTA countries as legal secretary in the EEA negotiations. Her main areas of responsibility was the drafting of EEA competition rules, including the institutional and procedural set up required for surveillance and enforcement of the rules., EFTA Secretary

  4. Senior Executive Officer, Ministry of Justice, legal department

  5. Research assistant/research fellow, University of Oslo, Faculty of Law

  1. Admitted to the Supreme Court

  2. Exam in Essential Project Management (5 ECTS)
    Skema Business School

  3. Candidate in Jurisprudence
    University of Oslo

  4. Diploma in Advanced European Studies
    College og Europe

  1. The Norwegian Chapter in "Merger Control - Trends and Developments" in Chambers Global Practice Guide

  2. "Doing Business in Norway - Law and Practice" in Chambers Global Practice Guide

  3. "Doing Business in Norway - Trends and Developements" in Chambers Global Practice Guide

  4. The Norwegian Chapter in "Cartels - Law and Practice" in Chambers Global Practice Guide

  5. The Norwegian Chapter in "Cartels - Trends and Development" in Chambers Global Practice Guide

  6. The Norwegian Chapter in "Cartels " in The Legal 500 Country Comparative Guides

  7. The Norwegian Chapter in "Merger Control - Trends and Developments" in Chambers Global Practice Guide

  8. The Norwegian Chapter in "Cartels" in Chambers Global Practice Guide

  9. The Norwegian Chapter in "Doing Business in Norway" in Chambers Global Practice Guide

  10. The Norwegian Chapter in "Antitrust Litigation 2020" in Chambers & Partner's Global Practice Guide

  11. The Norwegian Chapter in "Cartels 2020" in Chambers & Partner's Global Practice Guide

  12. The Norwegian Chapter in "Cartels " in The Legal 500 Country Comparative Guides

  13. "Om samarbeid har som formål å begrense konkurransen", leader in "Lov og Rett"

  14. "Prosjektsamarbeid: Kan vi fortsatt inngi felles tilbud på offentlige kontrakter?", article on bygg.no

  15. The Norwegian chapter in "Getting the Deal Through: Dominance 2017"

  16. "Om viltvoksende nemnder og betydningen av å luke bed", leader in "Lov og Rett"

  17. "Competition Law: A National Perspective", chapter in "The Handbook of EEA Law"

  18. The Norwegian chapter in "Competition and Cartel Leniency multi-jurisdictional guide"

  19. The Norwegian chapter in "Lex Mundi Pre-Merger Notification Guide"

  20. "Ble unntatt fra anskaffelsesreglene, article in "Energi"

  21. "Doing Justice in the EFTA Court - Some Reflections on Procedural Fundamental Rights", article in Judicial Protection in the European Economic Area

  22. "Konkurranseloven og rettssikkerhet - Behov for revisjon av konkurranseloven", article in "Konkurranseloven fem år - erfaringer og reformbehov", NHO publication

  23. The Norwegian chapter in "International Stock Purchase Acquisitions: Summaries of International Law"

  24. "The EFTA Court - Ten Years On"

  25. The Norwegian chapter in "Merger Control Worldwide"

  26. "Håndbok Konkurranseloven", NHO publication

  27. "Konkurransetilsynets virksomhet under konkurranseloven av 2004 - sett fra partene og deres advokaters side", article in Anniversary script for Konkurransetilsynet

  28. "Effektivitet eller rettssikkerhet? Håndhevning av konkurranseloven 2004", article in "Tidsskrift for forretningsjus 10 år"

  29. "Kontroll med oppkjøp og fusjoner under ny norsk konkurranselov", article in "Tidsskrift for forretningsjus 10 år"

  30. The Norwegian chapter in "IFLR Competition & Antitrust"

  31. The Norwegian chapter in "Getting the Deal Through"

  32. "Konkurranseloven: med kommentarer"

  33. "Konkurranse- og markedsføringsrett", chapter in "Knophs oversikt over Norges rett"

  34. "Norwegian Telecommunication Law", article in IFLR special supplement

  35. "Konkurransereglene og kraftmarkedet: oversikt over hovedreglene", chapter in "Vassdrags- og energirett"

  36. "Landbruks- og næringsmiddelssektoren og konkurranseretten - andelslagenes konkurranserettslige stilling", Institutet för internationell ekonomisk rätt, Nordisk Råd for forskning i Europæisk Integrationsret

  37. "EØS-avtalens betydning for forvaltningen", article in "Kritisk juss"

  38. "Presentation of the EEA Agreement and Its Institutional Set-Up", article in "EEA Competition Law"

  39. "Nasjonal og Europeisk konkurranserett", article in Det 33. nordiske juristmøte

  40. "EØS-avtalens konkurranseregler - har de praktisk betydning?", article in "Inforum"

  41. "Konkurranserett og konkurransepolitikk i EØS: nye utfordringer for norsk næringsliv?", article in "Praktisk økonomi & ledelse"

  42. "Har EØS-avtalen noen praktisk interesse?", article in "Praktisk økonomi & ledelse"