Source? From Wikipedia:

Both Corry and Schachner stated that C.K. privately apologized for his past behavior several years later.[142][144]

In response to The New York Times reporting, C.K. released a statement apologizing and admitting guilt, writing, “These stories are true” and saying that while he initially thought “it was okay because I never showed a woman my dick without asking first”, he went on to express remorse, stating, “the power I had over these women is that they admired me. And I wielded that power irresponsibly.”