United Kingdom:

1. University of Oxford
2. University of Cambridge
3. Imperial College London
4. London School of Economics and Political Science (LSE)
5. University of Edinburgh
6. University of Manchester
7. King’s College London
8. University of Bristol
9. University of Warwick
10. University of Glasgow
11. University of Southampton
12. University of Birmingham
13. University College London (UCL)
14. University of Sheffield
15. University of Leeds
16. University of Nottingham
    
17. University of York
18. Durham University
19. University of Exeter
20. University of St Andrews
21. University of Bath
22. University of Sussex
23. University of Liverpool
24. University of East Anglia (UEA)
25. University of Aberdeen
26. Queen Mary University of London
27. University of Reading
28. University of Leicester
29. Lancaster University
30. University of Surrey

United States.

1. Massachusetts Institute of Technology (MIT)
2. Stanford University
3. Harvard University
4. California Institute of Technology (Caltech)
5. Princeton University
6. Yale University
7. Columbia University
8. University of Chicago
9. University of Pennsylvania
10. Johns Hopkins University
11. Cornell University
12. University of California, Berkeley
13. Northwestern University
14. Duke University
15. University of Michigan, Ann Arbor
16. University of California, Los Angeles (UCLA)
17. University of Wisconsin-Madison
18. University of Washington
19. University of Texas at Austin
20. University of California, San Diego (UCSD)
21. University of North Carolina at Chapel Hill
22. Carnegie Mellon University
23. New York University (NYU)
24. University of Illinois Urbana-Champaign
25. Brown University
26. University of Southern California (USC)
27. University of Minnesota Twin Cities
28. University of Maryland, College Park
29. University of Virginia
30. University of Florida