DUBLIN – Calliditas Therapeutics AB is raising SEK650 million (US$74 million) in an IPO on the Nasdaq Stockholm exchange, which it priced Friday at SEK45 per share. An overallotment option, if exercised, would push the gross to SEK747 million. Commitments from current shareholders cover about half of the fundraising target. The book-building process kicks off today, and the shares are expected to start trading – under the stock symbol CALTX – on June 29.