Austria

	Team A	Team B
	Clara Köttl Philipp Lechner Timon Pesendorfer	Mia Abermann Anne Ladurner Donata Giulini
	Country coordinator and mentors
	Christina Morgenstern (CC) Christina Lassnig (Biology) Elisabeth Klaus (Chemistry) Elias Hohl (Physics)
	Observers
	Team intro

 

Belgium

  

	Team A	Team B
	Cas Van Herbruggen Wout Goethals Michail Ognyanov	Aurélien Chevalier Martin Ergo Anatole Otjacques
	Country coordinator and mentors
	Victor Rasquin (CC, Biology, Chemistry) Louis De Vos (Biology) Alexandre Marée (Chemistry) Bernadette Hendrickx (Physics)
	Observers
	Team intro

Bulgaria

  

	Team A	Team B
	Aleksandra Nikolova Stefan Spasov Raya Shikova	Aleksandar Vladimirov Stoyan Dobrev Lora Lukmanova
	Country coordinator and mentors
	Christina Andreeva (CC, Physics) Kalina Pachedzhieva (Biology) Vladimir Tzvetkov (Chemistry)
	Observers
	Team intro

Croatia

  

	Team A	Team B
	Kim Radešić Val Karan Roko Marić	Mila Maretić Karlo Domijan Karlo Ahel
	Country coordinator and mentors
	Tajana Begović (CC, Chemistry) Mirela Sertić Perić (Biology) Mario Basletić (Physics)
	Observers
	Team intro

Cyprus

  

	Team A	Team B
	Sofia Neophytou Vasilia Irakleous Kyriaki Assou	Kouzaris Panagiotis Thomas Achilleas Dimitriou Loizos
	Country coordinator and mentors
	Georgios Miliotis (CC, Chemistry) Nikolas Genethliou (Biology) Georgios Tsalakou (Physics)
	Observers
	Team intro

Czech Republic

  

	Team A	Team B
	Matěj Pěnička Filip Vyskočil Matouš Mišta	Jakub Krutina Daniel Theiss Vojtěch Langer
	Country coordinator and mentors
	Jan Kříž (CC, Physics) Jan Černý (Biology) Jan Kotek (Chemistry)
	Observers
	Team intro

Denmark

  

	Team A	Team B
	Zejnepa Zahirovic Jens-Kristian Tersløse Theodor Petersen	Nujuud Abdulkadir Bille Carl Vium Dueholm Lazizbek Nodirbekovich Husainov
	Country coordinator and mentors
	Hans Marker (CC, Biology) Søren Blanke (Chemistry) Lise Gade (Physics)
	Observers
	Tine Christiansen Jan Høst Richard Cleyton Bello Haji Bille
	Team intro

Estonia

  

	Team A	Team B
	Saskia Põldmaa Violeta Jürgens Mihkel Tali	Karl-Erik Volberg Merilis Moppel Jelizaveta Štšura
	Country coordinator and mentors
	Mihkel Pajusalu (CC, Biology) Karin Hellat (Chemistry) Ülle Kikas (Physics)
	Observers
	Team intro

Finland

  

	Team A	Team B
	Inka Lagus Tosca Grönroos Aapo Renfors	Lasse Niemi Lumi Öller Olavi Räsänen
	Country coordinator and mentors
	Nina Salminen (CC, Chemistry) Minni Aalto (Biology) Janne Rantanen (Physics)
	Observers
	Team intro

France

  

	Team A	Team B
	Léane Dubest Bourion Mathilde Mirabel Malo Lemonnier	Margot Rohac Elias Henriet Amandine Boisson
	Country coordinator and mentors
	Léo Fischer-Côte (CC, Physics) Aurélie Boucher (Biology) Claire Spada (Chemistry)
	Observers
	Team intro

Germany

  

	Team A	Team B
	Jieoh Ahn Vincent Schultze Oliver Eckstaedt	Leon Chen Sophie Junginger Luise Köhler
	Country coordinator and mentors
	Burkhard Schroeter (CC) Annabel Maisl (Biology) Jan Kruse (Chemistry) Konstantin Schwark (Physics)
	Observers
	Team intro

Greece

  

	Team A	Team B
	Sofia Klouvatou Kyriaki Styliani Salteri Xhoel Boshku	Vasiliki Valvi Marina Baselyous Sofia Razou
	Country coordinator and mentors
	Maria Tsakiri (CC) Aristea Kleidi (Biology) Antonios Chronakis (Chemistry) Christos Georgopoulos (Physics)
	Observers
	Panagiota Tsagkari Nikolaos Vathrakokoilis
	Team intro

Hungary

  

	Team A	Team B
	Benedek Bencz Márton Kertai Csaba Péter Viczkó	Kata Erdélyi Sára Réka Simonka Gergely Tóth
	Country coordinator and mentors
	Péter Vankó (CC, Physics) Sándor Bán (Biology) Attila Jancsó (Chemistry)
	Observers
	Tamás Sarkadi
	Team intro

Ireland

  

	Team A	Team B
	Christian Domsa Anastasia Vakaloudi Melaniya Stolbova	Lorne Walsh Yanko Yanchev Yilong She
	Country coordinator and mentors
	Paul van Kampen (CC, Physics) Keith Rochfort (Biology) Roisin Byrne (Chemistry)
	Observers
	Odilla Finlayson
	Team intro

Italy

  

	Team A	Team B
	Sara Pellizzari Maria Sole Tonizzo Marco Mattiazzi	Luca Vigato Pietro Grosselle Costanza Cavallini
	Country coordinator and mentors
	Carmelita Cipollone (CC, Physics) Paolo Laveder (Biology) Paolo Centomo (Chemistry)
	Observers
	Manuela Granella Raffaello Tedesco Fiorello Di Tillio
	Team intro

Latvia

  

	Team A	Team B
	Pāvels Baks Matīss Cīrulis Grieta Čipāne-Kipāne	Arnolds Pīrāgs Kristaps Lopatko Edvards Meržvinskis
	Country coordinator and mentors
	Ilze Izabella Dindune (CC, Biology) Līga Prieciņa(Chemistry) Vents Valle (Physiscs)
	Observers
	Team intro

Lithuania

  

	Team A	Team B
	Augustas Ukvalbergas Justas Miliauskas Titas Balčiūnas	Artūras Makselis Martynas Mykolas Barzda Pijus Tydmanas
	Country coordinator and mentors
	Paulius Lukas Tamošiūnas (CC, Biology) Kęstutis Baltakys (Chemistry) Tomas Kivaras (Physics)
	Observers
	Team intro

Luxembourg

  

	Team A	Team B
	Moritz Rohner Siena Ootes Max Thiel	Michèle Voncken Jasmine Winandy Anouk Mertens Goedert
	Country coordinator and mentors
	Jeff Kohnen (CC) Caroline Steffen (Biology) Jerry Wagener (Chemistry) Jacques Weydert (Physics)
	Observers
	Liss Weber Christophe Ternes Alexandre Salsmann
	Team intro

The Netherlands

  

	Team A	Team B
	Iva Beemster Marta Kavatsyuk Thomas van der Zwan	Allie Zong Ruben van Gaalen Sophie Snip
	Country coordinator and mentors
	Emiel de Kleijn (CC) Anne de Rond (Biology) Tom Bloemberg (Chemistry) André Eppink (Physics)
	Observers
	Jeroen Sijbers
	Team intro

Portugal

  

	Team A	Team B
	Afonso Benevides Rodrigo Gama Tomás Faria	Pedro Silva Matilde Augusto Gabriela Silva
	Country coordinator and mentors
	Catarina Ramos (CC) Pedro Oliveira (Biology) Alice Pereira (Chemistry) Célia Henriques (Physics)
	Observers
	Team intro

Slovenia

  

	Team A	Team B
	Aleksander Kosanović Žan Arsov Aljaž Erman	Andraž Matoš Enej Jauk Tomaž Holc
	Country coordinator and mentors
	Katja Stopar (CC, Biology) Matej Huš (Chemistry) Anita Nose (Physics)
	Observers
	Team intro

Sweden

  

	Team A	Team B
	Isak Samuelsson Casper De Ranter Manfred Levin	Peter Nyström Hannes Niklasson Ebba Jensen
	Country coordinator and mentors
	Jonas Forshamn (President of EOES; CC) Ivar Avelin (Biology) Suheyla Demir (Chemistry) Markus Nilsson (Chemistry) Susanne Tegler (Physics)
	Observers
	Team intro

Ukraine (Guest country)

  

	Team A	Team B
	Vladyslav Vlasenko Ivan Plieskov Oles Fedirko
	Country coordinator and mentors
	Svitlana Antonenko (CC, Biology) Iryna Bei (Chemistry) Maksym Pashko (Physics)
	Observers
	Team intro