| CountOfUser ID | Full institution name |
| 976 | University of Michigan |
| 855 | University of California Berkeley |
| 831 | Stanford University |
| 787 | Harvard |
| 741 | University of California Irvine |
| 738 | University of Minnesota |
| 723 | MIT |
| 695 | University of Wisconsin-Madison |
| 669 | Purdue University |
| 620 | Ohio State University at Columbus |
| 615 | University of Texas - Austin |
| 601 | University of Pennsylvania |
| 582 | University of Alberta |
| 567 | University of Illinois at Urbana-Champaign |
| 557 | Pennsylvania State University |
| 550 | Yale University |
| 538 | University of Toronto |
| 486 | University of Chicago |
| 469 | University of Pittsburgh |
| 465 | University of California San Diego |
| 446 | University of Washington |
| 394 | University of Illinois at Chicago |
| 391 | California Institute of Technology |
| 356 | Michigan State University |
| 353 | University of Rochester |
| 351 | Emory |
| 349 | Florida State University |
| 336 | Columbia University |
| 296 | SUNY Buffalo |
| 294 | University of Virginia |
| 293 | Iowa State University |
| 290 | Duke University |
| 289 | University of Kentucky |
| 284 | Wayne State University |
| 267 | University of North Carolina at Chapel Hill |
| 264 | Cornell |
| 258 | SUNY Stony Brook |
| 246 | Indiana University |
| 244 | North Carolina State |
| 241 | Boston College |
| 216 | Northwestern University |
| 207 | Montana State University |
| 205 | Rice University |
| 201 | Case Western University |
| 196 | Texas A&M University |
| 194 | Kent State |
| 183 | Johns Hopkins University |
| 181 | Notre Dame |
| 179 | University of Cinncinnati |
| 175 | Georgia Tech |
| 157 | Virginia Commonwealth University |
| 157 | North Dakota State University |
| 153 | University of Connecticut |
| 152 | Virginia Tech |
| 147 | University of California Davis |
| 143 | Brown |
| 141 | University of Iowa |
| 138 | University of Colorado at Boulder |
| 137 | University of Western Ontario |
| 133 | University of Georgia |
| 131 | University of Montreal |
| 126 | University of Massachusetts |
| 124 | Georgetown University |
| 118 | Queens University, Kingston Ontario |
| 118 | Washington University |
| 112 | Dartmouth |
| 110 | Southwestern Medical Center |
| 106 | Vanderbilt |
| 102 | University of Sherbrooke |
| 100 | University of Calgary |
| 100 | Simon Fraser University |
| 89 | University of Tennessee Knoxville |
| 87 | Princeton |
| 73 | Northeast Louisiana University |
| 67 | Texas Christian University |
| 66 | University of Akron |
| 62 | University of Wisconsin-System/Center campuses |
| 49 | University of Saskatchewan |
| 48 | Drexel |
| 47 | Worcester Polytechnic Institute |
| 36 | New York University |
| 13 | Mercer University |
| 13 | MD Anderson Cancer Center, U of Texas |
| 9 | Wayne State University (old CrossfirePlusReactions login) |
| 8 | Purdue University (old CrossfirePlusReactions login) |
| 6 | George Mason University |
| 6 | University of Waterloo |
| 5 | Iowa State University (old CrossfirePlusReactions login) |
| 4 | University of Wisconsin-Madison (old CrossfirePlusReactions login) |
| 4 | University of Southern California L.A |
| 4 | University of Michigan (old CrossfirePlusReactions login) |
| 3 | Connecticut College |
| 3 | University of Wisconsin-System /Center campuses (old CrossfirePlusReactions login) |
| 3 | University of Illinois at Urbana/Champaign (old CrossfirePlusReactions login) |
| 3 | University of South Florida |
| 2 | Georgia State |