Niklas Willén, National Library of Sweden The Bibsam Consortium consists of 90 Swedish research institutions that has agreements with all major academic publishers. Bibsam has been on the Open Access frontlines and has under the last 10 years completely moved away from read-only agreements, and has now a portfolio of over 25 transformative agreements. With this transition follows new ways to evaluate agreement performance. This presentation focuses on some of the challenges that the Bibsam Consortium is facing with transformative agreements. New evaluation methods is one aspect, but also the effort to move from legacy price models to a new price redistribution based on publishing output.