| 2025 | | Proceedings of the Combined 32nd International Workshop on Expressiveness in Concurrency and 22nd Workshop on Structural Operational Semantics, EXPRESS/SOS 2025, and 22nd Workshop on Structural Operational SemanticsAarhus, Denmark, 25th August 2025. | Denmark | |
| 2024 | | Proceedings Combined 31st International Workshop on Expressiveness in Concurrency and 21st Workshop on Structural Operational Semantics, EXPRESS/SOS 2024, and 21st Workshop on Structural Operational SemanticsCalgary, Canada, 9th September 2024. | Canada | |
| 2023 | | Proceedings Combined 30th International Workshop on Expressiveness in Concurrency and 20th Workshop on Structural Operational Semantics, EXPRESS/SOS 2023, and 20th Workshop on Structural Operational SemanticsAntwerp, Belgium, 18th September 2023. | Belgium | |
| 2022 | | Proceedings Combined 29th International Workshop on Expressiveness in Concurrency and 19th Workshop on Structural Operational Semantics, EXPRESS/SOS 2022, Warsaw, Poland, 12th September 2022. | Warsaw | |
| 2021 | | Proceedings Combined 28th International Workshop on Expressiveness in Concurrency and 18th Workshop on Structural Operational Semantics, EXPRESS/SOS 2021, and 18th Workshop on Structural Operational SemanticsParis, France (online event), 23rd August 2021. | France | |
| 2020 | | Proceedings Combined 27th International Workshop on Expressiveness in Concurrency and 17th Workshop on Structural Operational Semantics, EXPRESS/SOS 2020, and 17th Workshop on Structural Operational SemanticsOnline, 31 August 2020. | | |
| 2019 | | Proceedings Combined 26th International Workshop on Expressiveness in Concurrency and 16th Workshop on Structural Operational Semantics, EXPRESS/SOS 2019, Amsterdam, The Netherlands, 26th August 2019. EXPRESS, SOS | Kingdom of the Netherlands | 2019-01-01 |
| 2018 | | Proceedings Combined 25th International Workshop on Expressiveness in Concurrency and 15th Workshop on Structural Operational Semantics, EXPRESS/SOS 2018, Beijing, China, September 3, 2018. EXPRESS, SOS | Beijing | 2018-09-03 |
| 2017 | | Proceedings Combined 24th International Workshop on Expressiveness in Concurrency and 14th Workshop on Structural Operational Semantics, EXPRESS/SOS 2017, Berlin, Germany, 4th September 2017. EXPRESS, SOS | Berlin | 2017-01-01 |
| 2016 | | Proceedings Combined 23rd International Workshop on Expressiveness in Concurrency and 13th Workshop on Structural Operational Semantics, EXPRESS/SOS 2016, Québec City, Canada, 22nd August 2016. EXPRESS, SOS | Quebec City | 2016-01-01 |
| 2015 | | Proceedings of the Combined 22th International Workshop on Expressiveness in Concurrency and 12th Workshop on Structural Operational Semantics, EXPRESS/SOS 2015, Madrid, Spain, 31st August 2015. EXPRESS, SOS | Madrid | 2015-01-01 |
| 2014 | | Proceedings Combined 21st International Workshop on Expressiveness in Concurrency, EXPRESS 2014, and 11th Workshop on Structural Operational Semantics, SOS 2014, Rome, Italy, 1st September 2014. EXPRESS, SOS | Rome | 2014-01-01 |
| 2013 | | Proceedings Combined 20th International Workshop on Expressiveness in Concurrency and 10th Workshop on Structural Operational Semantics, EXPRESS/SOS 2013, Buenos Aires, Argentina, 26th August, 2013. EXPRESS, SOS | Buenos Aires | 2013-01-01 |
| 2012 | | Proceedings Combined 19th International Workshop on Expressiveness in Concurrency and 9th Workshop on Structured Operational Semantics, EXPRESS/SOS 2012, Newcastle upon Tyne, UK, September 3, 2012. EXPRESS, SOS | Newcastle upon Tyne | 2012-09-03 |
| 2011 | 18 | Proceedings 18th International Workshop on Expressiveness in Concurrency, EXPRESS 2011, Aachen, Germany, 5th September 2011. EXPRESS | Aachen | 2011-01-01 |
| 2010 | 17 | Proceedings 17th International Workshop on Expressiveness in Concurrency, EXPRESS'10, Paris, France, August 30th, 2010. EXPRESS | Paris | 2010-08-30 |
| 2009 | 16 | Proceedings 16th International Workshop on Expressiveness in Concurrency, EXPRESS 2009, Bologna, Italy, 5th September 2009. EXPRESS | Bologna | 2009-01-01 |
| 2008 | 15 | Proceedings of the 15th Workshop on Expressiveness in Concurrency, EXPRESS 2008, Toronto, ON, Canada, August 23, 2008 | Toronto | |
| 2007 | 14 | Proceedings of the 14th International Workshop on Expressiveness in Concurrency, EXPRESS 2007, Lisbon, Portugal, September 3, 2007 | Lisbon | |
| 2006 | 13 | Proceedings of the 13th International Workshop on Expressiveness in Concurrency, EXPRESS 2006, Bonn, Germany, August 26, 2006 | Bonn | |
| 2005 | 12 | Proceedings of the 12th Workshop on Expressiveness on Concurrency, EXPRESS 2005, San Francisco, CA, USA, August 27, 2005 | San Francisco | |
| 2004 | 11 | Proceedings of the 11th International Workshop on Expressiveness in Concurrency, EXPRESS 2004, London, UK, August 30, 2004 | London | |
| 2003 | 10 | Proceedings of the 10th International Workshop on Expressiveness in Concurrency, EXPRESS 2003, Marseille, France, September 2, 2003 | France | |
| 2002 | 9 | 9th International Workshop on Expressiveness in Concurrency, EXPRESS 2002, Satellite Workshop from CONCUR 2002, Brno, Czech Republic, August 19, 2002 | Brno | |
| 2001 | 8 | 8th International Workshop on Expressiveness in Concurrency, EXPRESS 2001, Satellite Workshop from CONCUR 2001, Aalborg, Denmark, August 20, 2001 | Aalborg | |
| 2000 | 7 | 7th International Workshop on Expressiveness in Concurrency, EXPRESS 2000, Satellite Workshop of CONCUR 2000, State College, PA, USA, August 21, 2000 | State College | |
| 1999 | 6 | 6th International Workshop on Expressiveness in Concurrency, EXPRESS 1999, Eindhoven, The Netherlands, August 23, 1999 | Kingdom of the Netherlands | |
| 1998 | | Fifth International Workshop on Expressiveness in Concurrency, EXPRESS 1998, Satellite Workshop of CONCUR 1998, Nice, France, September 7, 1998 | Nice | |
| 1997 | | International Workshop on Expressiveness in Concurrency, EXPRESS 1997, Santa Margherita Ligure, Italy, September 8-12, 1997 | Santa Margherita Ligure | |
