This book constitutes the refereed proceedings of the 20th International Conference on Algorithmic Aspects in Information and Management, AAIM 2026, which took place virtually, during June 19–21, 2026.

The 52 full papers included in this book were carefully reviewed and selected from 111 submissions. The topics covered in the AAIM 2026 proceedings are algorithmic aspects in information and management, such as combinatorial optimization and applications pertaining to computing.