Source:
https://sports.usatoday.com/ncaa/finances
Methodology explained here:
https://sports.usatoday.com/2019/08/12/m...-database/
Last year's numbers:
https://csnbbs.com/thread-852575.html
Ohio State Big Ten $205,556,663
Michigan Big Ten $195,769,104
Penn State Big Ten $165,373,214
Wisconsin Big Ten $151,966,795
Michigan State Big Ten $145,640,289
Nebraska Big Ten $142,223,226
Iowa Big Ten $137,093,027
Minnesota Big Ten $124,847,642
Indiana Big Ten $122,933,136
Illinois Big Ten $115,132,186
Purdue Big Ten $103,092,204
Rutgers Big Ten $100,745,386
Maryland Big Ten $98,294,571
Note: Private school data weren't included
The changes from last year are that Michigan State jumped ahead of Nebraska and Iowa while Purdue jumped over Rutgers and Maryland.