SPARC has released Big Deal Cancellation Tracking.
Here's an excerpt:
The "big deal" has often been compared to a cable or satellite TV package, an apt analogy insofar as the customer cannot choose to pass on content that is of no interest, with initial price breaks quickly giving way to locked-in increases. Much like the millions of consumers who have chosen to "cut the cord", a growing number of libraries are electing to critically appraise these big deals by assessing their collections, the value for money they are receiving from these packages, and how they might more strategically spend their finite collections resources. . . .
Among the institutions that have cancelled big deals are the following. This list is by no means comprehensive.