Before we spend countless hours researching a company, we like to analyze what insiders, hedge funds and billionaire investors think of the stock first. This is a necessary first step in our investment process because our research has shown that the elite investors' consensus returns have been exceptional. In the following paragraphs, we find out what the billionaire investors and hedge funds think of PerkinElmer, Inc. (NYSE:PKI). Is PKI stock a buy? PerkinElmer, Inc. (NYSE:PKI) has experienced a decrease in hedge fund sentiment of late. PerkinElmer, Inc. (NYSE:PKI) was in 31 hedge funds' portfolios at the end of December.