Exhibit 99.1
Mustang Bio Announces Amendment and Closing of Strategic Manufacturing Partnership Transaction with uBriGene (Boston) Biosciences
Transaction and reduction in operating expenses enhance Mustang’s cash position
Worcester, MA – July 31, 2023 – Mustang Bio, Inc. (“Mustang” or the “Company”) (Nasdaq: MBIO), a clinical-stage biopharmaceutical company focused on translating today’s medical breakthroughs in cell and gene therapies into potential cures for difficult-to-treat cancers and rare genetic diseases, today announced that, on July 28, 2023, it amended its previously announced asset purchase agreement with uBriGene (Boston) Biosciences Inc. (“uBriGene”), the U.S. subsidiary of uBriGene Group, a leading cell and gene therapy contract development and manufacturing organization (“CDMO”) and closed the transaction under the terms of the amended asset purchase agreement.
Per the terms of the amended agreement, at closing, uBriGene acquired all of Mustang’s assets primarily relating to the manufacturing and production of cell and gene therapies for upfront consideration of $6 million in cash. Mustang’s lease to the premises in Worcester, Massachusetts where its state-of-the-art clinical- and commercial-scale cell and gene therapy manufacturing facility is located (and related contracts and manufacturing personnel) did not transfer at closing because such transfer requires the consent of the landlord, which has requested additional time to consider the proposed transfer. An additional $5 million contingent payment (less any outstanding liabilities relating to transferred contracts and employees) will be payable to Mustang upon (i) Mustang’s raising $10 million in gross proceeds from equity raises following the closing of the transaction and (ii) completion of the assignment of Mustang’s lease to uBriGene, which remains subject to landlord’s approval. Unless and until the lease is transferred to uBriGene, Mustang will retain its facility lease and facility personnel, and will continue to occupy the leasehold premises and manufacture there its lead product candidate, MB-106.
The amended asset purchase agreement provides that Mustang will continue to work with uBriGene to secure the assignment of its manufacturing facility lease, which would complete the transfer of its facility to uBriGene as originally planned. The Company and uBriGene expect to complete their filing of a joint voluntary notice to obtain clearance for the transaction from the U.S. Committee on Foreign Investment in the United States (“CFIUS”) no later than August 31, 2023. It is expected that CFIUS may take up to 90 days to complete its review, after which Mustang’s landlord has informed the Company that it will require an additional 30 days to review the request for consent to assign the lease. If, after 120 days from the date of closing, the lease has not transferred to uBriGene, uBriGene may request the parties use their best commercial efforts to negotiate in good faith a repurchase by Mustang of the transferred assets and assumed liabilities acquired on the date of closing.
Under the terms of the amended asset purchase agreement, the lease of the facility and related contracts are to be transferred to uBriGene within three business days following receipt of the landlord’s consent to the proposed lease transfer, and Mustang employees who support the transferred operations and have accepted offers of employment with uBriGene will become employees of uBriGene effective on the date that is 30 days following the completion of the lease transfer.
At closing, Mustang and uBriGene also entered into a manufacturing services agreement, under which Mustang contracted uBriGene to manufacture Mustang’s lead product candidates. This includes the manufacturing of MB-106, the Company’s first-in-class CD20-targeted autologous CAR T therapy, for the ongoing multi-center Phase 1/2 trial in patients with non-Hodgkin lymphoma and chronic lymphocytic leukemia. Pending the landlord’s determination regarding transfer of the facility lease to uBriGene, Mustang and uBriGene also have entered into a second manufacturing services agreement, under which Mustang will serve as uBriGene’s contract development and manufacturing provider and will