Lilly broke the news Monday morning that ImClone had accepted its offer to acquire the biotech firm for $6.5 billion or $70 per share—Lilly’s largest acquisition ever.

With this purchase Lilly gains control of ImClone’s blockbuster, targeted cancer agent Erbitux, which is marketed for second- and third-line colon cancer and refractory head and neck cancer.

ImClone also has five monoclonal antibodies in clinical development—including one in Phase III and two currently moving out of Phase II trials. The acquisition will help Lilly meet the challenge of patent expiration that it will see in the next decade and bolster its 13 oncology drugs currently in development.

One sticking point will be how the deal affects ImClone’s co-marketing pact with Bristol-Myers Squibb in the United States. BMS currently pays a 39 percent distribution fee to ImClone for Erbitux and owns 17 percent of ImClone stock. In an investor call this morning, Lilly said it could not comment on the situation. (more…)