Investor-State Arbitration 2025

ESTONIA Trends and Developments Contributed by: Maria Pihlak, Carri Ginter, Raul Kartsep and Katariina Kuum, Sorainen

• Transparent decision-making in FDI and sanctions matters • Early-warning systems to identify potential dis- putes before they escalate • Co-ordination between ministries responsible for defence, economy, foreign affairs and justice • Investment in legal capacity through training, inter- agency co-operation and external advisory support These measures help reduce both the financial and reputational risks of future disputes. For arbitration outcomes and jurisprudence Tribunals examining disputes involving Estonia are likely to focus on: • Whether investors were adequately warned about potential regulatory changes • Whether government measures were proportionate and justified by security or sanctions concerns • Whether investors had access to meaningful review or appeal mechanisms • How awards interact with EU sanctions and public- policy obligations • Whether any compensation for expropriation is fair and prompt The outcomes of these cases will not only shape Esto- nia’s reputation but may also influence broader Euro- pean debates on balancing investment protection with national security and sanctions policies. The evolution of Estonia’s ISDS profile Looking ahead, Estonia’s investor–state arbitration profile is likely to evolve in several ways: • Parties: Claims will more often originate from non-EU investors under extra-EU BITs, given the demise of intra-EU arbitration. • Value: The value of claims may increase alongside high-capital investments in defence and dual-use sectors. • Complexity: Disputes are expected to grow more complex, often involving intersections with EU law, sanctions and export controls. • Enforcement: Disputes over recognition of awards and the treatment of frozen assets will become more prominent than disputes over merits alone.

• Preventive governance: Estonia will likely institu- tionalise best practices – regulatory transparency, consultation mechanisms and arbitration-readiness – to deter claims before they arise. In this sense, Estonia may follow the path of other advanced small economies that have turned limited ISDS experience into a strength by building special- ised state-defence capabilities and clear policy frame- works. Conclusion Estonia sits at the crossroads of technological inno- vation, geopolitical tension and evolving investment law. Its goal to become a regional hub for defence and dual-use technology will draw significant foreign investment, but it also increases the risk of arbitration. At the same time, Estonia’s approach to frozen assets and alignment with EU sanctions raises new questions about property rights and international obligations. Investor–state arbitration is becoming a central part of Estonia’s investment landscape. Investors will need to anticipate regulatory and political changes, struc- ture their investments carefully, and choose dispute resolution mechanisms that work under both EU and international law. Estonia, meanwhile, must balance national security measures, sanctions enforcement and investment promotion within a clear and coher- ent legal framework. If managed strategically, Estonia’s evolving engage- ment with ISDS can enhance rather than undermine its investment climate. Transparent laws, fair proce- dures and well-drafted treaties can provide the cer- tainty investors seek while preserving the sovereign space Estonia requires to safeguard security and uphold international norms. In this balance lies the future of investor–state arbitration in Estonia – not as an unavoidable conflict, but as a tool to maintain trust, predictability and the rule of law in a complex global environment.

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