Northwestern does not, other than National Merit.
They have a few other scholarships, but those appear to be for students who have applied for financial aid. The Founders Scholarship (on the list of scholarships that the second link leads to) is for students from “middle-income families,” but no info about what that means other than the fact that eligibility is determined during the financial aid process…
Does Northwestern offer merit aid?
Northwestern scholarship funds are awarded in accordance with our need-based financial aid policy. However, Northwestern is an institutional sponsor of National Merit Scholarships. In addition, the School of Music awards a number of talent scholarships to incoming students with outstanding performance in auditions.
http://undergradaid.northwestern.edu/help/faq.html
Students who apply for aid will automatically be considered for all forms of institutional assistance listed below.
http://undergradaid.northwestern.edu/types-of-aid/scholarships-grants/northwestern-scholarships.html