X4 Pharmaceuticals Completes Merger with Arsanis

X4 Pharmaceuticals, Inc., a clinical-stage biopharmaceutical company focused on the development of novel therapeutics for the treatment of rare diseases, today announced the completion of its merger with Arsanis, Inc., effective as of March 13, 2019.

"We are very pleased to complete this transformative event that enables us to achieve the next level of corporate growth as we seek to usher in a new generation of therapies for patients with rare genetic diseases and rare cancers. The merger enables us to accelerate our lead program with X4P-001 in WHIM syndrome towards Phase 3 as we evolve into a pre-commercial global corporation," said Paula Ragan, Ph.D., President and Chief Executive Officer of X4 Pharmaceuticals. "With the acquisition of synergistic R&D capabilities, X4 intends to establish a globally-recognized Center of Research Excellence to build upon our core science and technology, and to create long-term growth for a sustainable global rare disease business."

The holders of shares of X4 capital stock outstanding immediately prior to the merger received 0.5702 shares of Arsanis common stock in exchange for each share of X4 capital stock in the merger. On March 13, 2019, Arsanis is effecting a six-for-one reverse stock split. As a result of the reverse stock split, every six shares of Arsanis common stock outstanding following the merger, including the shares issued to the holders of shares of X4 capital stock in the merger, will be combined and reclassified into one share of Arsanis common stock. No fractional shares will be issued in connection with the reverse stock split. Instead, cash, based on the average closing price per share of Arsanis common stock on the Nasdaq Global Market on the 10 consecutive trading days prior to March 13, 2019, will be paid in lieu of fractions of shares.

Following the merger and the reverse stock split, the combined organization is expected to have approximately 6.7 million shares outstanding.

In connection with the merger, Arsanis will change its name to X4 Pharmaceuticals, Inc. The combined organization will commence trading on March 14, 2019 on the Nasdaq Capital Market under the symbol "XFOR".

The combined organization will operate under the leadership of X4’s management team prior to the merger, including Paula Ragan, Ph.D., President and Chief Executive Officer, and Adam S. Mostafa, Chief Financial Officer. The board of directors of the combined organization is comprised of six directors: four directors from the former X4 board, Michael S. Wyzga, Isaac Blech, Gary J. Bridger, Ph.D. and Dr. Ragan, and two directors from the former Arsanis board, David McGirr and René Russo, Pharm.D., BCPS. Mr. Wyzga is the new chairman of the board. The corporate headquarters of the combined organization is located in Cambridge, Massachusetts.

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