Asahi Kasei to Buy Swedish Biotech for Rare Disease Drug

  • Japanese bidder offers 83% premium to grow pharma business
  • Sweden’s Calliditas makes kidney treatment approved in US

The move comes as large pharma companies snap up smaller, more innovative firms to gain promising products. 

Photographer: David McNew/Getty Images
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Japanese industrial group Asahi Kasei Corp. plans to buy Swedish biotechnology firm Calliditas Therapeutics AB for about 11.8 billion kronor ($1.1 billion) to boost its global health-care business.

Asahi Kasei offered to pay 208 kronor per share, an 83% premium to Calliditas’s previous close, prompting the stock to surge to a record 205.2 kronor in Stockholm trading.