Purple Biotech Expands Pipeline of First-in-Class Therapeutics with Acquisition of Immunorizon and Its Portfolio of Tri-Specific Antibodies for the Treatment of Cancer

Purple Biotech Ltd. announced that it has entered into an agreement for the acquisition of Immunorizon Ltd., a private company developing potential multi-specific T and NK cell engager oncology therapies that selectively activate the immune response within the tumor microenvironment. The acquisition will provide Purple Biotech with an expanded portfolio of investigational tri-specific antibody compounds that target multiple antigens and offer the potential to further expand to additional targets.

Immunorizon’s lead asset is a conditionally-activated tri-specific antibody that engages both T cells and NK cells to mount a strong, localized immune response within the tumor microenvironment. The third arm of the lead compound specifically targets the Tumor Associated Antigen (TAA) 5T4, that is expressed in a variety of solid tumors and is correlated with advanced disease, increased invasiveness and poor clinical outcomes. 5T4 is a well-known target that has been validated by multiple pre-clinical and clinical programs. The drug candidates Purple Biotech is acquiring are differentiated from other multi-specific cell therapies targeting 5T4+ tumors by its cleavable capping technology, which confines the compound’s therapeutic activity to the local tumor microenvironment, and thereby potentially increases the anticipated therapeutic window in patients.  The acquisition will also provide Purple Biotech with additional preclinical assets targeting other TAAs through this technology platform.

“We are delighted to add Immunorizon’s portfolio of tri-specific antibodies to our drug development pipeline,” said Gil Efron, CEO of Purple Biotech. “The acquisition of these assets highly fits our strategy of expanding our pipeline, and we believe that the acquired technology platform has the potential to expand to multiple additional development programs. This new technology is differentiated not only by the combination of the NK and T cell engagement, but also by the conditional activation at the tumor microenvironment, which we believe provides an opportunity for better therapeutic outcomes for cancer patients. Bi-specifics as a class have undergone multiple iterations of technological improvements that have culminated in a basket of approved and/or clinically de-risked assets with several recent industry partnerships that have formed around such platforms. Novel multi-specifics have seen increasing industry attention and we are excited with our first step into this field. We believe that we will be able to leverage the knowledge and expertise we have gained over the years through both preclinical and clinical development. We expect to advance the first of the newly acquired assets to an IND submission in approximately two years in parallel to our ongoing promising clinical programs from which we expect to report clinical data during this year.”

Purple Biotech is acquiring 100% of the shares of Immunorizon Ltd., a privately held, VC-backed biopharmaceutical company, in exchange for an aggregate upfront payment of $3.5 million in cash and an aggregate $3.5 million in American Depository Shares (ADSs), at a price per ADS equal to the NASDAQ volume-weighted average price of the Company’s ADSs for the 60-day period preceding the execution date of the agreement.    Additional long-term development, regulatory and sales milestones are set at an aggregate amount of $94 million, with royalties of low single digit out of net sales. The accumulated transaction payments, excluding the upfront payment, will not exceed $100 million.

The ADSs will be issued to certain of the Immunorizon selling shareholders and will be subject to a three – month lock-up period, and the Company has agreed to file a resale registration statement with the U.S. Securities and Exchange Commission to register the ADSs for resale following the lock-up period. The selling shareholders of Immunorizon that shall receive ADSs as partial consideration in the transaction will be entitled to an ADS price adjustment during the 12-month period following the closing of the transaction, for the remaining ADSs held by them at such time (if any), in the event of an issuance by us of additional ADSs or other securities in certain types of financing transactions, at a price per ADS lower than the price per ADS under the agreement; provided that such price adjustment shall only be provided once.

The closing of the transaction is subject to satisfaction of customary closing conditions, expected within 10 business days.

This communication does not constitute an offer to sell or the solicitation of an offer to buy the ADSs or any securities, nor shall there be any sale of the ADSs or any securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction. The ADSs of Purple Biotech will be issued to the certain selling shareholders of Immunorizon on a private placement basis pursuant to applicable exemptions from the prospectus requirements under applicable Israeli securities laws and from the registration requirements of the United States Securities Act of 1933, as amended (the “U.S. Securities Act”).  The securities offered have not been registered under the U.S. Securities Act or any U.S. state or Israeli securities laws, and may not be offered or sold in the United States or in Israel, or to, or for the account or benefit of, United States persons or persons in Israel absent registration or any applicable exemption from the registration and/or prospectus requirements of the U.S. Securities Act and applicable U.S. state and/or Israeli securities law.