NKTR-255

– NKTR-255 Combination Expanded NK Cells and Enhanced ADCC Against Rituximab-Resistant Burkitt Lymphoma (BL) Cells – SAN FRANCISCO, Dec. 11, 2023 /PRNewswire/ -- Nektar Therapeutics (NASDAQ:NKTR) announced that collaborators from the Cairo Laboratory at New York Medical College presented a poster highlighting new preclinical data on NKTR-255 at the 65th American Society of Hematology (ASH) Annual Meeting demonstrating that NKTR-255 significantly enhanced the cytotoxicity of expanded Natural Killer (NK) cells when combined with obinutuzumab against rituximab-resistant BL cells and significantly improved the survival of mice xenografted with Raji-4RH compared to controls. NKTR-255 is a novel polymer-conjugated human IL-15 receptor agonist currently being studied in three separate clinical studies in combination with cell therapies and immunotherapies. Preclinical and early clinical data suggest that NKTR-255 can improve proliferation and persistence of NK and CD8+ T cells to enhance specific anti-tumor activity. "Both in vitro and in vivo data show the promising synergistic potential of combining NKTR-255 with an anti-CD20 antibody, obinutuzumab, in enhancing anti-tumor immune response, particularly in an aggressive tumor model like Burkitt lymphoma," said Jonathan Zalevsky, Ph.D., Senior Vice President and Chief Research & Development Officer at Nektar. "Results like these confirm our belief that NKTR-255 could become a valuable addition to current standard of care across multiple oncology indications, particularly in hematologic malignancies." 2023 ASH presentations are available for download at . Key details and takeaways from the presentation are as follows: Abstract 2063: "Optimizing Ex-Vivo Expanded NK Cell- Mediated Cellular Cytotoxicity By Obinutuzumab Combined with NKTR-255 in Burkitt Lymphoma (BL)", Chu YY, et al. NKTR-255 significantly promoted NK cell proliferation, and significantly enhanced the antibody-dependent cellular cytotoxicity (ADCC) of expanded NK cells when combined with obinutuzumab against rituximab-resistant BL cells in vitro. NKTR-255 significantly enhanced the release of interferon-gamma (IFNγ) and granzyme B, proinflammatory cytokines with multiple functions including enhancing anti-tumor immune response, by NK cells when combined with obinutuzumab against BL cells in vitro. NKTR-255 combined with obinutuzumab and NK cells significantly extended survival, compared to NK cells alone, in humanized rituximab-resistant BL cells xenografted mouse models. About NKTR-255 NKTR-255 is a biologic that targets the IL-15 pathway in order to activate the body's innate and adaptive immunity. Through optimal engagement of the IL-15 receptor complex, NKTR-255 is designed to enhance functional NK cell populations and formation of long-term immunological memory, which may lead to sustained and durable anti-tumor immune response. NKTR-255 is currently being studied in three separate clinical studies in combination with cell therapies and immunotherapy. A Phase 2/3 study is underway that combines NKTR-255 with approved CAR-T cell therapies in patients with diffuse large B-cell lymphoma, which is currently recruiting (NCT05664217). NKTR-255 is also being studied in a Phase 2 study in combination with avelumab as a maintenance treatment in patients with locally advanced or metastatic urothelial carcinoma in the Merck KGaA-sponsored JAVELIN Bladder Medley trial (NCT05327530). In September, the company announced a new clinical collaboration whereby CBMG will be adding NKTR-255 to its ongoing CBMG-sponsored Phase 1 clinical trial evaluating C-TIL051, a tumor-infiltrating lymphocyte therapy, in anti-PD1 resistant metastatic non-small cell lung cancer, which is being conducted at Duke Cancer Institute (NCT05676749). In addition, there are two ongoing investigator sponsored trials (ISTs) evaluating NKTR-255 as adjunct therapy following a CAR-T cell therapy and one study evaluating NKTR-255 in combination with PD-1 immunotherapy. Fred Hutchinson Cancer Center is conducting a Phase 1 study evaluating NKTR-255 following lisocabtagene maraleucel treatment in patients with relapsed/refractory large B-cell lymphoma (NCT05359211), and Stanford University is conducting a Phase 1 study evaluating NKTR-255 following an investigational CD19/22 CAR-T cell therapy in patients with relapsed or refractory B-cell acute lymphoblastic leukemia (NCT03233854). M.D. Anderson Cancer Center is conducting a Phase 1 study evaluating NKTR-255 in combination with durvalumab in patients with locally advanced NSCLC (NCT05632809). About Nektar Therapeutics Nektar Therapeutics is a biopharmaceutical company with a robust, wholly owned R&D pipeline of investigational medicines in immunology and oncology as well as a portfolio of approved partnered medicines. Nektar is headquartered in San Francisco, California, with additional manufacturing operations in Huntsville, Alabama. Further information about the company and its drug development programs and capabilities may be found online at . Cautionary Note Regarding Forward-Looking Statements This press release contains forward-looking statements which can be identified by words such as: "will," "could," "develop," "potential," "advance" and similar references to future periods. Examples of forward-looking statements include, among others, statements regarding the therapeutic potential of, and future development plans for, NKTR-255. Forward-looking statements are neither historical facts nor assurances of future performance. Instead, they are based only on our current beliefs, expectations and assumptions regarding the future of our business, future plans and strategies, anticipated events and trends, the economy and other future conditions. Because forward-looking statements relate to the future, they are subject to inherent uncertainties, risks and changes in circumstances that are difficult to predict and many of which are outside of our control. Our actual results may differ materially from those indicated in the forward-looking statements. Therefore, you should not rely on any of these forward-looking statements. Important factors that could cause our actual results to differ materially from those indicated in the forward-looking statements include, among others: (i) our statements regarding the therapeutic potential of NKTR-255 are based on preclinical and clinical findings and observations and are subject to change as research and development continue; (ii) NKTR-255 is an investigational agent and continued research and development for these drug candidates is subject to substantial risks, including negative safety and efficacy findings in future clinical studies (notwithstanding positive findings in earlier preclinical and clinical studies); (iii) NKTR-255 is in various stages of clinical development and the risk of failure is high and can unexpectedly occur at any stage prior to regulatory approval; (iv) the timing of the commencement or end of clinical trials and the availability of clinical data may be delayed or unsuccessful due to challenges caused by the COVID-19 pandemic, regulatory delays, slower than anticipated patient enrollment, manufacturing challenges, changing standards of care, evolving regulatory requirements, clinical trial design, clinical outcomes, competitive factors, or delay or failure in ultimately obtaining regulatory approval in one or more important markets; (v) we may not achieve the expected cost savings we expect from our 2022 corporate restructuring and reorganization plan or our 2023 cost restructuring plan and we may undertake additional restructuring and cost-saving activities in the future, (vi) patents may not issue from our patent applications for our drug candidates, patents that have issued may not be enforceable, or additional intellectual property licenses from third parties may be required; and (vii) certain other important risks and uncertainties set forth in our Annual Report on Form 10-Q filed with the Securities and Exchange Commission on November 8, 2023. Any forward-looking statement made by us in this press release is based only on information currently available to us and speaks only as of the date on which it is made. We undertake no obligation to update any forward-looking statement, whether written or oral, that may be made from time to time, whether as a result of new information, future developments or otherwise. Contact: For Investors: Vivian Wu of Nektar Therapeutics 628-895-0661 For Media: David Rosen of Argot Partners (212) 600-1902 [email protected] SOURCE Nektar Therapeutics

SAN FRANCISCO, Nov. 7, 2023 /PRNewswire/ -- Nektar Therapeutics (Nasdaq: NKTR) today reported financial results for the third quarter ended September 30, 2023. Cash and investments in marketable securities at September 30, 2023, were $372.7 million as compared to $505.0 million at December 31, 2022. Nektar's cash and marketable securities are expected to support strategic development activities and operations into the middle of 2026. "We've made significant progress across our pipeline, including initiating a Phase 2b atopic dermatitis study in October and completing plans to start a Phase 2b alopecia areata study in early 2024," said Howard W. Robin, President and CEO of Nektar. "These two studies position us for important and transformative data readouts for rezpegaldesleukin in the first half of 2025. In September, we signed a new clinical study collaboration with cell therapy leader, Cellular Biomedicine Group, who will evaluate NKTR-255 in combination with CBMG's tumor-infiltrating lymphocyte therapy in advanced non-small cell lung cancer. This study is an example of the potential of NKTR-255 in combination with a range of cell therapies in liquid and solid tumors. Finally, we will end this year in a strong financial position with at least $320 million in cash and investments which provides us with a cash runway into the middle of 2026." Summary of Financial Results Revenue in the third quarter of 2023 was $24.1 million as compared to $23.6 million in the third quarter of 2022. Revenue for the first nine months of 2023 was $66.2 million as compared to $70.0 million in the first nine months of 2022. Total operating costs and expenses in the third quarter of 2023 were $69.0 million as compared to $77.9 million in the third quarter of 2022. Total operating costs and expenses in the first nine months of 2023 were $296.4 million as compared to $393.7 million in the first nine months of 2022. The reduction in operating costs and expenses for both the third quarter and the first nine months of 2023 were due to decreases in research and development expenses, general and administrative expense and restructuring, impairment and costs of terminated program. For the first nine months of 2023, these decreases were partially offset by $76.5 million in non-cash goodwill impairment. R&D expense in the third quarter of 2023 was $24.1 million as compared to $33.6 million for the third quarter of 2022. For the first nine months of 2023, R&D expense was $84.2 million as compared to $183.6 million in the first nine months of 2022. R&D expense decreased for both the third quarter and first nine months of 2023 due to the wind down of the bempegaldesleukin program. G&A expense was $21.1 million in the third quarter of 2023 as compared to $22.5 million in the third quarter of 2022. For the first nine months of 2023, G&A expense was $60.1 million as compared to $70.4 million in the first nine months of 2022. G&A expense decreased for both the third quarter and first nine months of 2023 due to the wind down of the bempegaldesleukin program. Restructuring, impairment and costs of terminated program were $11.4 million in the third quarter of 2023 as compared to $16.8 million in the third quarter of 2022. The amount for the third quarter of 2023 includes $10.2 million in non-cash lease and equipment impairment charges, $0.7 million for the wind down of the bempegaldesleukin program and $0.5 million in severance. The amount for the third quarter of 2022 includes $8.5 million for the wind down of the bempegaldesleukin program, $5.0 million for contract termination and other restructuring costs, $2.1 million in severance and $1.2 million in non-cash lease impairment charges. For the first nine months of 2023, restructuring, impairment and costs of terminated program were $49.1 million. This amount includes $36.6 million in non-cash lease and equipment impairment charges, $8.0 million in severance and $3.6 million for the wind down of the bempegaldesleukin program. For the first nine months of 2022, restructuring, impairment and costs of terminated program were $124.4 million. This amount includes $58.5 million in non-cash lease and equipment impairment charges, $29.8 million in severance, $28.9 million for the wind down of the bempegaldesleukin program and $7.1 million in contract termination and other restructuring costs. Net loss for the third quarter of 2023 was $45.8 million or $0.24 basic and diluted loss per share as compared to a net loss of $59.0 million or $0.31 basic and diluted loss per share in the third quarter of 2022. Net loss in the first nine months of 2023 was $234.0 million or $1.23 basic and diluted loss per share as compared to a net loss of $308.5 million or $1.65 basic and diluted loss per share in the first nine months of 2022. Excluding the $10.2 million in non-cash impairment charges, net loss, on a non-GAAP basis, for the third quarter of 2023 was $35.7 million or $0.19 basic and diluted loss per share. Excluding the $113.1 million in non-cash goodwill and other impairment charges, net loss, on a non-GAAP basis, for the first nine months of 2023 was $120.8 million or $0.64 basic and diluted loss per share. Third Quarter 2023 and Recent Business Updates In September 2023, Nektar announced a clinical study collaboration with Cellular Biomedicine Group Inc. (CBMG) to evaluate NKTR-255 in combination with C-TIL051 in advanced non-small cell lung cancer (NSCLC) patients that are relapsed or refractory to anti-PD-1 therapy. Under the collaboration, CBMG will add NKTR-255 to its ongoing Phase 1 clinical trial being conducted at Duke Cancer Institute. Enrollment for this trial is ongoing. In October 2023, Nektar presented final data from the Phase 1b study of rezpegaldesleukin in patients with atopic dermatitis at the 2023 European Academy of Dermatology and Venereology (EADV) Congress. Patients with moderate-to-severe AD that were treated with rezpegaldesleukin showed dose-dependent improvements in Eczema Area and Severity Index (EASI), Validated Investigator Global Assessment (vIGA), Body Surface Area (BSA), and Itch Numeric Rating Scale (NRS) over 12 weeks of treatment compared to placebo, which were sustained post-treatment over an additional 36 weeks. At the highest studied dose, the proportion of Daily Life Quality Index (DLQI) responders was 75% and the proportion of Patient Oriented Eczema Measure (POEM) responders was 65% at week 12. rezpegaldesleukin was well tolerated with no patients in the rezpegaldesleukin groups experiencing severe, serious, or fatal adverse events, and no anti-rezpegaldesleukin antibodies were detected. In October 2023, Nektar initiated a Phase 2b study of rezpegaldesleukin in patients with atopic dermatitis. Conference Call to Discuss Third Quarter 2023 Financial Results Nektar management will host a conference call to review the results beginning at 5:00 p.m. Eastern Time/2:00 p.m. Pacific Time, November 7, 2023. This press release and live audio-only webcast of the conference call can be accessed through a link that is posted on the Home Page and Investors section of the Nektar website: . The web broadcast of the conference call will be available for replay through December 8, 2023. To access the conference call, please pre-register at Nektar Earnings Call Registration. All registrants will receive dial-in information and a PIN allowing them to access the live call. About Nektar Therapeutics Nektar Therapeutics is a biopharmaceutical company with a robust, wholly owned R&D pipeline of investigational medicines in immunology and oncology as well as a portfolio of approved partnered medicines. Nektar is headquartered in San Francisco, California, with additional manufacturing operations in Huntsville, Alabama. Further information about the company and its drug development programs and capabilities may be found online at . Cautionary Note Regarding Forward-Looking Statements This press release contains forward-looking statements which can be identified by words such as: "will," "could," "develop," "potential," "advance" and similar references to future periods. Examples of forward-looking statements include, among others, statements regarding the therapeutic potential of, and future development plans for, rezpegaldesleukin and NKTR-255. Forward-looking statements are neither historical facts nor assurances of future performance. Instead, they are based only on our current beliefs, expectations and assumptions regarding the future of our business, future plans and strategies, anticipated events and trends, the economy and other future conditions. Because forward-looking statements relate to the future, they are subject to inherent uncertainties, risks and changes in circumstances that are difficult to predict and many of which are outside of our control. Our actual results may differ materially from those indicated in the forward-looking statements. Therefore, you should not rely on any of these forward-looking statements. Important factors that could cause our actual results to differ materially from those indicated in the forward-looking statements include, among others: (i) our statements regarding the therapeutic potential of rezpegaldesleukin and NKTR-255 are based on preclinical and clinical findings and observations and are subject to change as research and development continue; (ii) rezpegaldesleukin and NKTR-255 are investigational agents and continued research and development for these drug candidates is subject to substantial risks, including negative safety and efficacy findings in future clinical studies (notwithstanding positive findings in earlier preclinical and clinical studies); (iii) rezpegaldesleukin and NKTR-255 are in various stages of clinical development and the risk of failure is high and can unexpectedly occur at any stage prior to regulatory approval; (iv) the timing of the commencement or end of clinical trials and the availability of clinical data may be delayed or unsuccessful due to challenges caused by the COVID-19 pandemic, regulatory delays, slower than anticipated patient enrollment, manufacturing challenges, changing standards of care, evolving regulatory requirements, clinical trial design, clinical outcomes, competitive factors, or delay or failure in ultimately obtaining regulatory approval in one or more important markets; (v) we may not achieve the expected cost savings we expect from our 2022 corporate restructuring and reorganization plan or our 2023 cost restructuring plan and we may undertake additional restructuring and cost-saving activities in the future, (vi) patents may not issue from our patent applications for our drug candidates, patents that have issued may not be enforceable, or additional intellectual property licenses from third parties may be required; and (vii) certain other important risks and uncertainties set forth in our Annual Report on Form 10-Q filed with the Securities and Exchange Commission on August 9, 2023. Any forward-looking statement made by us in this press release is based only on information currently available to us and speaks only as of the date on which it is made. We undertake no obligation to update any forward-looking statement, whether written or oral, that may be made from time to time, whether as a result of new information, future developments or otherwise. Contact: For Investors: Vivian Wu of Nektar Therapeutics 628-895-0661 For Media: David Rosen of Argot Partners (212) 600-1902 [email protected] SOURCE Nektar Therapeutics