So since there really isn’t a thread with updated transfer acceptance rates, so I figured this could be useful for future transfers. Feel free to add to this thread (I can’t find data for some universities)!
[these acceptance rates are calculated from the most recent common data set I could find for the respective schools]
Harvard College 2014-2015
13/1432 = 0.91%
Brown University 2015-2016
152/1834 = 8.29%
Vanderbilt University 2015-2016
419/1308 = 32%
Tufts University 2015-2016
175/957 = 18.3%
Dartmouth College 2015-2016
29/751 = 3.9%
Georgetown University 2015-2016
285/2056 = 13.9%
MIT 2015-2016
22/490 = 4.5%
Stanford University 2015-2016
20/2023 = 0.98%
University of Pennsylvania 2015-2016
210/2491 = 8.43%
Cornell University 2015-2016
766/4117 = 18.6%
Yale University 2015-2016
28/1250 = 2.2%
Johns Hopkins University 2015-2016
153/1173 = 13.0%
Caltech 2014-2015
4/151 = 2.6%
Duke University
3-7% [according to their website]
Northwestern University 2015-2016
213/1791 = 11.9%
Washington University at St. Louis 2015-2016
235/1031 = 22.8%
Rice University 2015-2016
81/559 = 14.5%
University of Notre Dame 2015-2016
164/640 = 25.6%
Carnegie Mellon University 2015-2016
84/831 = 10.1%
University of California, Berkeley 2015-2016
3271/17251 = 18.96%
University of California, Los Angeles 2015-2016
5188/20075 = 25.8%
University of Southern California 2015-2016
2483/8179 = 30.4%
University of Virginia 2015-2016
990/2484 = 39.85%
Wake Forest University 2015-2016
74/349 = 21.2%
New York University 2014-2015
1883/6545 = 28.8%
University of Michigan, Ann Arbor 2015-2016
1286/3605 = 35.7%
University of North Carolina, Chapel Hill 2015-2016
1215/2735 = 44.4%
Brandeis University 2015-2016
172/568 = 30.3%
College of William and Mary 2015-2016
411/910 = 45.2%
Emory University (according to collegeniche, not from common data set)
260/912 = 28.5%
University of Chicago (according to collegeniche, not from common data set)
88/674 = 13.1%
Columbia University (according to collegeniche, not from common data set)
106/1339 = 7.9%