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    Silverback Therapeutics, Inc. (SBTX) Stock Trending Higher Following Announcement of Clinical Supply Agreement with Regeneron

    By ST Staff

    Jul 07,2021

    7:14 AM UTC

    Silverback Therapeutics, Inc. (SBTX) stock prices were up by 1.02% just around the market opening on July 7th 2021, bringing the price per share up to USD$28.83 at the start of the trading day.

    Clinical Supply Agreement

    July 7th 2021 saw the company announce a clinical supply agreement for the PD-1 inhibitor, Libtayo, (cemiplimab) with Regeneron. The supply agreement will facilitate the evaluation of the treatment in combination with SBT6050, the pioneer of targeted immune-oncology agents. These agents are designed to route a TLR8 agonist linker-payload to activate myeloid cells in tumors expressing levels of HER2 that are moderate and higher.


    The treatment’s unique capacity to activate both innate and adaptive immune responses could potentially enhance and expand the effectiveness of a PD-1 inhibitor in HER2-expressing solid tumors. The company is keen to complete the ongoing dose escalation of SBT6050 combined with a PD-1 inhibitor as it begins tumor-specific expansion cohorts.

    Clinical Trial of SBT6050

    The first quarter of 2021 saw the company commence treatment in Part 3 of the Phase 1/1b study to evaluate the activity of SBT6050 administered in conjunction with PD-1 inhibitor in dose escalation. As per the agreement, the company will expand its ongoing Phase 1/1b trial to evaluate the combination of SBT6050 and Libtayo in tumor-specific dose expansion cohorts. The treatment will initially be used in HER2-expressing non-small cell lung cancer and gastric cancer.


    Libtayo is being collaboratively developed and commercialized by Regeneron and Sanofi as a PD-1 blocking antibody. It has been approved for the first-line treatment of patients with advanced NSCLC that have tumors that exhibit a high PD-L1 expression. This was determined by an FDA-approved test for adults with metastatic cutaneous squamous cell carcinoma (CSCC) or locally advanced CSCC who are not candidates for curative surgery or curative radiation. The treatment was also for patients with advanced basal cell carcinoma previously treated with a hedgehog pathway inhibitor or for patients where HHI is not a valid option, being either locally advanced (full approval) or metastatic (accelerated approval).

    Future Outlook for SBTX

    Armed with its recent clinical supply agreement, the company is poised to capitalize on the tenured profitability it has secured for the contract term. Current and potential investors are hopeful that management will continue to leverage the resources at their disposal to facilitate significant and sustained increases in shareholder value.

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