* I use the latest (2019) Putnam result as a proxy to identify schools with math buddies at undergraduate level. Putnam is the premium undergraduate math competition in North America. Top 500s are equivalent to USAMO qualifiers.
* Some top high school math competitors do not attend Putnam in college. Still most do especially in colleges with strong math competition tradition.
* This table is most useful to identify peers for high school students performing at top AIME/USAMO qualifier level.
| College | Putnam Top 200 | Putnam 300-500 | Top 500 |
| MIT | 96 | 35 | 131 |
| CMU | 18 | 38 | 56 |
| Princeton | 13 | 10 | 23 |
| UCLA | 6 | 13 | 19 |
| UWaterloo | 12 | 5 | 17 |
| Harvard | 7 | 9 | 16 |
| UCB | 5 | 9 | 14 |
| Duke | 4 | 10 | 14 |
| UToronto | 4 | 7 | 11 |
| Stanford | 7 | 3 | 10 |
| Yale | 2 | 8 | 10 |
| Columbia | 4 | 5 | 9 |
| UIUC | 2 | 7 | 9 |
| GIT | 0 | 9 | 9 |
| CALTECH | 2 | 6 | 8 |
| Chicago | 2 | 6 | 8 |
| UTA | 4 | 3 | 7 |
| Washington U | 3 | 4 | 7 |
| Brown | 0 | 7 | 7 |
| Cornell | 0 | 7 | 7 |
| Michigan | 1 | 4 | 5 |
| Harvey Mudd | 0 | 5 | 5 |
