Jana Partners is making headlines again, this time for pressuring Juniper Networks, Inc. (NYSE:JNPR) with their shareholder activism, but not every relationship the group has with management teams is so adversarial. In fact, according to the latest performance update for the Jana Partners Master Fund, a copy of which was obtained by ValueWalk, there appears to be a transformation going on in the pharma industry. “Endo Health Solutions Inc (NASDAQ:ENDP) was the third largest contributor to performance in the quarter and a top 15 contributor for the year,” the company wrote. Jana Partners started watching Endo Health Solutions in January and…