Short answer - no, there is no list.
Long answer:
The Church generally defines grave matter as being found in the ten commandments. The catechism does a great job at outlining each of these commandments and what are sins against them; sometimes noting specifically when something is definitely considered grave. This is a great starting point.
Other resources you could look at are certain books/booklets used for examinations of conscience, which try to list out mortal sins. These are helpful, but not fully authoritative (written by priest/theologians, they are not actual Church documents).
But even after reading these sources, there are many questions remaining. Often “grave” is a relative disctinction, and so there are no firm rules that govern all circumstances. eg theft can be grave or venial, but there is no set dollar figure at which it crosses from one to another.