Juno Prices $250 Million Follow-on Offering

SEATTLE--(BUSINESS WIRE)--Juno Therapeutics, Inc. (NASDAQ:JUNO), a biopharmaceutical company developing innovative cellular immunotherapies for the treatment of cancer, today announced the pricing of its follow-on public offering of 6,100,000 shares of its common stock at a price to the public of $41.00 per share. In addition, Juno has granted the underwriters a 30-day option to purchase up to an additional 915,000 shares of common stock. Juno intends to use the net proceeds of the offering for general corporate purposes and working capital.

The offering is expected to close on September 26, 2017, subject to customary closing conditions. Concurrent with the completion of the follow-on public offering, Juno will complete a private placement of 659,415 shares of its common stock, at a price of $41.00 per share, to a subsidiary of Celgene Corporation. Aggregate gross proceeds from the follow-on public offering and concurrent private placement, before deducting underwriting discounts and commissions, in the case of the follow-on public offering, and expenses payable by Juno will be $277.1 million (or approximately $318.7 million if the underwriters exercise their option to purchase additional shares in full).

Morgan Stanley and J.P. Morgan are acting as joint book-running managers for the offering. Barclays and Leerink Partners are acting as co-lead managers and Wells Fargo Securities, Raymond James and Wedbush PacGrow are acting as co-managers.

A registration statement on Form S-3 relating to the common stock offered in the public offering described above was filed with the Securities and Exchange Commission (SEC) on September 20, 2017 and was automatically effective upon filing. The offering is being made only by means of a written prospectus that forms a part of the registration statement. Copies of the final prospectus related to the offering may be obtained from Morgan Stanley & Co. LLC, Attention: Prospectus Department, 180 Varick Street, 2nd Floor, New York, NY 10014 and J.P. Morgan Securities LLC, c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, New York 11717, Attn: Prospectus Department, or by telephone at (866) 803-9204.

This press release shall not constitute an offer to sell or the solicitation of an offer to buy the securities being offered, nor shall there be any sale of the securities being offered in any state or other jurisdiction in which such offer, solicitation or sale would be unlawful prior to the registration or qualification under the securities laws of any such state or other jurisdiction.

About Juno Therapeutics

Juno Therapeutics is building a fully integrated biopharmaceutical company focused on developing innovative cellular immunotherapies for the treatment of cancer. Founded on the vision that the use of human cells as therapeutic entities will drive one of the next important phases in medicine, Juno is developing cell-based cancer immunotherapies based on chimeric antigen receptor and high-affinity T cell receptor technologies to genetically engineer T cells to recognize and kill cancer. Juno is developing multiple cell-based product candidates to treat a variety of B-cell malignancies as well as multiple solid tumors and multiple myeloma. Several product candidates have shown compelling clinical responses in clinical trials in refractory leukemia and lymphoma conducted to date. Juno's long-term aim is to leverage its cell-based platform to develop new product candidates that address a broader range of cancers and human diseases. Juno brings together innovative technologies from some of the world's leading research institutions, including the Fred Hutchinson Cancer Research Center, Memorial Sloan Kettering Cancer Center, Seattle Children's Research Institute (SCRI), the University of California, San Francisco, and The National Cancer Institute. Juno Therapeutics has an exclusive license to the St. Jude Children’s Research Hospital patented technology for CD19-directed product candidates that use 4-1BB, which was developed by Dario Campana, Chihaya Imai, and St. Jude Children’s Research Hospital. Juno’s product candidate JCAR017 was developed in collaboration with SCRI and others.