The acquisition comes on the heels of the French group's $760 million purchase of cloud computing specialist Bull.
The deal reflects Repsol's drive to expand in politically stable regions following its skirmish with Argentina over YPF.
Stock in the Sydney-listed, Atlanta-based company closes above the $1.8 billion value of the spurned bid.
The French company plans "rapid expansion" in Asia and Africa and warned this may take a toll on its credit rating.
The French foodmaker may yet retain the business, which has attracted proposals worth about $4 billion from Hospira and a consortium led by Fresenius.
The Brazilian mining group said the Japanese investment in Moatize and a related refinancing will save it $3.65 billion.
The Canadian oil and gas producer confirms approaches about potential transactions from unidentified parties as well as its Madrid peer.
The company plans to spin off a majority holding in its conventional energy business to shareholders by 2016.
The Korean conglomerate is selling the stakes to rival chaebol Hanwah Corp., as it simplifies its structure and offloads holdings.
Analysts suggest the offer bears the hallmarks of the French government and question the benefits of a fusion.