Here are the most recent numbers from the US Department of Education College Navigator:
American Intercontinental University: 89 full-time instructors for 14,333 students.
American Public University System has 332 F/T instructors for 48,688 students.
Aspen University has 27 F/T instructors for 7,386 students.
Capella University: 180 F/T for 39,727 students.
Colorado State University Global: 40 F/T instructors for 9,565 students.
Colorado Technical University: 55 F/T instructors for 24,808 students.
Devry University online: 61 F/T instructors for 26,384 students.
Grand Canyon University has 550 F/T instructors for 101,816 students.*
Liberty University: 735 F/T for 96,709 students.*
Purdue University Global: 337 F/T instructors for 45,125 students.
South University: 41 F/T instructors for 7,707 students.
Southern New Hampshire University: 130 F/T for 164,091 students.
University of Arizona Global Campus: 122 F/T instructors for 34,190 students.
University of Maryland Global: 177 F/T instructors for 55,838 students.
University of Phoenix: 80 F/T instructors for 88,891 students.
Walden University: 235 F/T for 42,312 students.
*Most F/T faculty serve the ground campuses that profit from the online schools.
https://www.highereducationinquirer.org/2024/02/robocollege-update.html