For those curious like me, the split is:

• Mercedes: 142 (133 modern + 9 1950s) wins
• McLaren: 101 wins
• Brawn GP: 8 wins
• Racing Point: 1 win

Wikipedia only counts the 133 modern wins for Mercedes, since the modern Ilmor / Mercedes AMG HPP is technically a distinct entity from the 1950s Mercedes factory team.