OMAHA, Neb. (AP) — Warren Buffett says he is feeling fine more than a month after finishing his prostate cancer treatments.

The 82-year-old chairman and CEO of Berkshire Hathaway said Wednesday during an interview on CNBC that the treatments were tiring. He underwent six weeks of radiation treatments, and finished them in September

The billionaire investor disclosed his cancer diagnosis in April.

He has said he feels good and his cancer is not considered life-threatening because it was caught early.