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Photo Tallinn Old Town by By Ben Bender, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=117939512

The 9th International Conference on Applied Category Theory will take place in Tallinn, Estonia at the Taltech Maritime Academy from 6 - 10 July, preceded by the Adjoint School Research Week from June 29 - July 3, 2026. This conference follows previous events at Florida (2025), Oxford (2024), Maryland (2023), Strathclyde (2022), Cambridge (2021), MIT (2020), Oxford (2019) and Leiden (2018).

ACT conference particularly encourages participation from underrepresented groups. The organizers are committed to non-discrimination, equity, and inclusion. The code of conduct for the conference is available here.

Registration

Registration is now open.

Registration costs include lunch during the conference week, conference dinner, coffee breaks and an excursion.
The participants will also receive a free public transit pass valid from 28th June to 12th July 2026.

Early bird registration closes June 12, 2026.

Early-bird registration fees

  • Academics: €490
  • Students: €320
  • Industry: €650

Late registration fees (until June 29)

  • Academics: €590
  • Students: €420
  • Industry: €750

Financial support

We have a budget allocated for financial assistance for participants. Priority will be given to accepted speakers, Ph.D. students, and early career researchers. If this would be useful to you, please submit an application by completing this google form by Monday 15 June (Anywhere on Earth).

Important Dates

Abstracts Due 23 March 24 March 2026  
Full Papers Due 30 March 2026  
Author Notification 11 May 2026 15 May 2026  
Final versions of papers for proceedings 20 June 2026  
Registration opens 15 May 2026  
Early-bird registration ends 12 June 2026  
Financial support application deadline 15 June 2026  
Financial support notification 22 June 2026  
Adjoint School 29 June – 3 July 2026  
Conference 6 July – 10 July 2026  

Sponsors

The organizers thank the City of Tallinn for sponsoring free public transport for the conference attendees from 28 June to 12 July 2026 (00:00 - 23:59). For useful advice and inspiration on Tallinn's top attractions, activities, events, and places to eat and drink, check out the city's official tourism portal, www.visittallinn.ee, or follow @VisitTallinn on social media.


City of Tallinn         Tallinn University of Technology        
Contact email: act2026@taltech.ee

Website based on a bootstrap design by Hartmut Eilers and Eric Koskinen.