Do you have any source for that? Since I find that number to be unrealistic.
According to Imdb Keanu got $10M + 10% of the gross for the first Matrix, and $15M + 15% of the gross for each of the sequels.
I don't know if that means he got percentage of the gross just from domestic, or from foreign too.
However I counted his upfront salaries and percentage of the worldwide gross, and got $260M, from all three movies.
Out of that he would of course have to pay his management, agent, and taxes. So he might end up with "just" over $100M.
Again, that's just simplistic math, in reality it's very much possible that his gross profit deal had certain stipulations in it that prevented him from getting that much.
I have also read conflicting reports on him giving money to the crew.
Some reports say that he gave some stunt guys motorcycles, another one says that he gave the visual effects team millions of dollars, however that hasn't been confirmed anywhere so those seem to be just rumours.
I have read on VFX forums where some of the artists who worked on the Matrix films wrote that they haven't gotten any money or gifts from Keanu, and haven't heard of anyone else getting anything either.
I like Keanu and think he's a good guy, but I think this story of him being charitable with the crew has been widely exaggerated and misconstrued on the internet.
I find it very hard to believe that he would have given the crew tens of millions of dollars, without there being any evidence or even first hand comments from the crew members. Just rumours.