Reinsurer PartnerRe Ltd. agreed Monday to be acquired by Italian investment firm Exor S.p.A in an all-cash deal of $140.50 per share, including a special pre-closing dividend of $3.00 per share, for a total transaction value of about $6.9 billion. The deal, which has the unanimous approval of the the Boards of Directors of both PartnerRe and Exor, is expected to close in the first quarter of 2016