University of Pennsylvania transgender swimmer Lia Thomas won the 500 free event at the NCAA Women’s Championships by 1.75 seconds Thursday.

In first place, Thomas finished at 4:33.24, according to results published on swimmeetresults.tech. The three runners-up swam 4:34.99, 4:35.92, and 4:36.18.

Thomas also won the Thursday morning qualifier, beating the second-place swimmer by 2.97 seconds, a time difference greater than the gap between second and 11th place in the same event, according to results published by SwimSwam.