"Pim" Stemmer (12 March 1957 – 2 April 2013) was a Dutch scientist and entrepreneur who has invented numerous biotechnologies.
He was the founder and CEO of Amunix Inc., a company that creates "pharmaceutical proteins with extended dosing frequency".
His other prominent inventions include DNA shuffling, now referred to as molecular breeding.
He holds more than 97 patents.
Stemmer was honored with the Charles Stark Draper Prize in 2011 for the pioneering contributions to directed evolution which won the Nobel Prize in Chemistry in 2018.
He was elected as member of National Academy of Engineering.
Stemmer died of cancer on April 2, 2013.