@Mwfan1921 is correct that there are 34 “A+” rated schools. The top 15 receive a higher rating within the “A+” grade = 4.5.
The final 19 “A+” graded schools have a lower numerical ratings assigned by Forbes, but are still within the A+ band.
Unfortunately, the Forbes website constantly jerks or jumps & frequently reverts to TV commercials which makes it difficult to retrieve the rankings.
The 15 schools which receive both Forbes’ highest letter grade (A+) and Forbes’ highest numerical grade (4.5) are:
Stanford
MIT
Notre Dame
Princeton
UPenn
Yale
Northwestern
Dartmouth College
Columbia
Williams College
Cornell
CalTech
Rice
Hillsdale College
Carnegie Mellon University (CMU)
After these top 15 rated schools at 4.5 (A+), the numerical scores decrease. For example: Harvard’s numerical score is less than a 4.5, but still within the A+ ranking range.