LONDON — The French drug maker Sanofi said on Monday that it had agreed to acquire Bioverativ, a biopharmaceutical company focused on treatments for hemophilia and other rare blood disorders, for $11.6 billion in cash.
Sanofi has sought use acquisitions to bolster its portfolio of drugs, particularly because it faces declining sales for its diabetes drug, Lantus, which has lost its patent protection. According to the company, sales of Lantus declined more than 16 percent in the first nine months of last year, based on constant exchange rates, and rivals are moving to introduce generic versions of the treatment.
The Bioverativ deal would enhance Sanofi’s “presence in specialty care and leadership in rare diseases” and “creates a platform for growth in other rare blood disorders,” Olivier Brandicourt, the Sanofi chief executive, said in a news release.
Bioverativ, based in Waltham, Mass., was spun out of Biogen last year. It markets two products to treat hemophilia in Australia, Canada, Japan and the United States. The company generated $847 million in sales in 2016.
John G. Cox, the Bioverativ chief executive, said, “Sanofi brings proven capabilities and a global infrastructure, which we believe will help to more rapidly expand access to our medicines globally and further our mission of transforming the lives of people with rare blood disorders.”