Fred Ramsdell

Frederick Jay Ramsdell (born December 4, 1960) is an American immunologist and Nobel Prize laureate. As of 2025, he is an advisor at Sonoma Biotherapeutics, a biotechnology company co-founded by him.

In 2025, he was jointly awarded the Nobel Prize in Physiology or Medicine with Mary E. Brunkow and Shimon Sakaguchi for their work in peripheral tolerance.