U.S. stock futures suggest Wall Street will open higher on Thursday, as the annual gathering of central bankers in Jackson Hole, Wyoming, kicks off.
Current CEO Blake Irving will retire at year's end.
The department store's founding family controls 31% of the company and has been considering a buyout since June.
KKR's expanded medical transport business will serve five million patients per year.
The deal is worth $1.4 billion and PharMerica's board has already given it the green light.