Calliditas Therapeutics launches US IPO roadshow and targets a capital raise of MUSD 75

Calliditas Therapeutics AB (publ) will today launch an investor roadshow for a contemplated initial public offering of American Depositary Shares in the United States for trading on The Nasdaq Global Market in the United States and a concurrent private placement of common shares to certain qualified investors in Europe and other countries outside of the United States. The target size of the global offering is MUSD 75 of gross proceeds plus a potential over-allotment of 15 percent. The offering is subject to market conditions and investor demand and the number of American Depositary Shares and common shares that may be offered and the price for such instruments have not yet been determined.

Stockholm, June 1, 2020 - Calliditas Therapeutics AB (publ) (“Calliditas”) announces that it has today filed an updated preliminary prospectus with the U.S. Securities and Exchange Commission (the “SEC”) and will commence an investor roadshow for a global offering with a target size of MUSD 75 in gross proceeds, plus a potential over-allotment of 15 percent.

Copies of the updated preliminary prospectus related to the contemplated initial public offering in the United States (the “U.S. Offering”, and together with the concurrent private placement, the “Global Offering”) are available at www.sec.gov. An application to list the American Depositary Shares (“ADSs”) on The Nasdaq Global Market, under the symbol “CALT”, has been submitted.

Calliditas will announce the outcome of the Global Offering after pricing in a subsequent press release, however, any further details regarding the offering remain subject to market conditions and investor demand and the offering may not be consummated. Calliditas’ common shares are currently listed on Nasdaq Stockholm under the symbol “CALTX” and Calliditas intends to maintain the listing on Nasdaq Stockholm. The filing of the preliminary prospectus in the United States with the SEC has no implications for Calliditas’ listing on Nasdaq Stockholm in Sweden.

This company announcement does not constitute an offer to sell nor a solicitation of an offer to buy, nor shall there be any sale of these securities in any state or jurisdiction in which such an offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

A registration statement relating to the ADSs referred to herein has been filed with the SEC, but has not yet been declared effective. These ADSs may not be sold, nor may offers to buy these ADSs be accepted prior to the time such registration statement becomes effective. Citigroup Global Markets Inc., Jefferies LLC and Stifel, Nicolaus & Company, Incorporated are acting as the global coordinators and joint book-running managers of the Global Offering. Carnegie Investment Bank AB is acting as co-manager of the Global Offering. Citigroup Global Markets Inc. and Jefferies LLC are acting as representatives of the underwriters in the U.S. Offering. Citigroup Global Markets Limited and Jefferies International Limited are acting as representatives of the underwriters in the concurrent private placement. Copies of the preliminary prospectus relating to the U.S. Offering may be obtained from Citigroup Global Markets Inc., Attention: Prospectus Department, c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, New York 11717, or by telephone at +1 (800) 831-9146; Jefferies LLC, Attention: Equity Syndicate Prospectus Department, 520 Madison Avenue, 2nd Floor, New York, New York 10022, via telephone: +1 877-821-7388 or via email: Prospectus_Department@Jefferies.com or from Stifel, Nicolaus & Company, Incorporated, Attention: Syndicate, One Montgomery Street, Suite 3700, San Francisco, CA 94104, or by telephone at +1 (415) 364-2720 or by email at syndprospectus@stifel.com.

For further information, please contact:

Renée Aguiar-Lucander, CEO at Calliditas

Tel.: +46 722 52 10 06, e-mail: renee.lucander@calliditas.com

Mikael Widell, Head of Communications and IR

Tel.: +46 703 11 99 60, e-mail: mikael.widell@calliditas.com

Optimum Strategic Communications

Mary Clark, Supriya Mathur, Manel Mateus

T: +44 (0) 203 922 0891

E: calliditas@optimumcomms.com

The information in the press release is information that Calliditas is obliged to make public pursuant to the EU Market Abuse Regulation. The information was submitted for publication, through the agency of the contact persons above, on June 1, 2020 at 13:00 (CEST).

About Calliditas

Calliditas Therapeutics AB is a specialty pharmaceutical company based in Stockholm, Sweden. It is focused on developing high quality pharmaceutical products for patients with a significant unmet medical need in niche indications, in which Calliditas can partially or completely participate in the commercialization efforts. Calliditas is focused on the development and commercialization of the product candidate Nefecon, a unique two step formulation optimized to combine a time lag effect with a concentrated release of the active substance budesonide, within a designated target area. This patented, locally acting formulation is intended for treatment of patients with the inflammatory renal disease IgA nephropathy (IgAN). Calliditas is running a global Phase 3 study within IgAN and aims to commercialize Nefecon in the United States. Calliditas is listed on Nasdaq Stockholm (ticker: CALTX).