3M Co. announced Thursday at deal to buy privately held wound care company Acelity Inc. in deal valued at $6.7 billion, including debt, from a consortium of funds advised by Apax Partners, together with affiliates of Canada Pension Plan Investment Board and the Public Sector Pension Investment Board. 3M's stock fell 0.7% in premarket trade. 3M expects to fund the deal, which is expected to close in the second half of 2019, with a combination of cash and new debt.