GlobeNewswire Inc | Nov 12, 2020 04:03PM EST

November 12, 2020

-- First patientdosed in clinical trial of NKX101, investigational NK cell therapy engineered with NKG2D-targeted CAR, in acute myeloid leukemia and myelodysplastic syndromes -- IND application for NKX019 expected to be filed in 1Q 2021 -- Ended third quarter 2020 with $330.2 million of cash and cash equivalents, believed to be sufficient to fund operations into at least the second half of 2023

SOUTH SAN FRANCISCO, Calif., Nov. 12, 2020 (GLOBE NEWSWIRE) -- Nkarta, Inc. (Nasdaq: NKTX), a clinical-stage biopharmaceutical company developing engineered natural killer (NK) cell therapies to treat cancer, today reported financial results for the third quarter ended September 30, 2020, and highlighted recent corporate accomplishments.

Were excited by the continued progress made at Nkarta this quarter and the ability of our teams to advance Nkartas allogeneic, off-the-shelf cell therapy programs, said Paul J. Hastings, President and Chief Executive Officer of Nkarta. We have dosed the first patient in our first clinical trial of NKX101, continue to prepare our in-house clinical GMP capabilities for the production of NKX019, and remain on track to file Nkartas second IND in the first quarter of 2021 for NKX019. With patients always foremost in mind, we remain focused on advancing Nkartas NK cell platform as the next foundation in anti-cancer cell therapy.

Recent Developments

-- First patient dosed in the Phase 1 clinical trial of NKX101, a first-in-class investigational NK cell cancer immunotherapy engineered to express a chimeric antigen receptor (CAR) targeting NKG2D ligand, for the treatment of relapsed/refractory acute myeloid leukemia (AML) and higher risk myelodysplastic syndromes (MDS). -- Nadir Mahmood, Ph.D. appointed to the expanded role of Chief Financial and Business Officer, having previously served as Nkartas Chief Business Officer. He succeeded Matthew Plunkett, Ph.D., who stepped down as Chief Financial Officer in October 2020. -- Alicia J. Hager, J.D., Ph.D. joined Nkarta as its Chief Legal Officer.

Anticipated Near-term Clinical Milestones

-- In 1Q 2021, Nkarta expects to file an Investigational New Drug (IND) Application for NKX019, an investigational NK cell therapy engineered to target tumors expressing CD19 antigen for the treatment of B-cell malignancies.

Third Quarter 2020 Financial Highlights

-- Cash and Cash Equivalents: As of September 30, 2020, Nkarta had cash, cash equivalents, restricted cash and short-term investments of $330.2 million, which includes proceeds from the Companys July 2020 IPO of $265.1 million, net of underwriting discounts and commissions and other offering costs. -- R&D Expenses: Research & development expenses were $9.8 million for the third quarter of 2020, which includes $0.7 million of non-cash stock-based compensation expense. -- G&A Expenses: General and administrative expenses were $3.9 million for the third quarter of 2020, which includes $0.9 million of non-cash stock-based compensation expense. -- Net Loss. Net loss was $13.7 million, or $0.44 per basic and diluted share, for the quarter ended September 30, 2020.

Financial Guidance

-- Nkarta expects its current cash and cash equivalents will be sufficient to fund its current operating plan into at least the second half of 2023. The company expects cash and cash equivalents at December 31, 2020 to be in the range of $300 million to $310 million.

About NKX101NKX101 is an investigational, off-the-shelf cancer immunotherapy that uses natural killer (NK) cells derived from the peripheral blood of healthy donors and engineered with membrane-bound IL15 and a chimeric antigen receptor (CAR) targeting NKG2D ligands on tumor cells. NKG2D, a key activating receptor found on naturally occurring NK cells, induces a cell-killing immune response through the detection of stress ligands that are widely expressed on cancer cells. By engineering NKX101 with the proprietary NKG2D-based CAR, the ability of NK cells to recognize and kill tumor cells in pre-clinical models is increased significantly compared to non-engineered NK cells. The addition of membrane-bound IL15, a proprietary version of a cytokine for activating NK cell growth, has been shown in pre-clinical models to enhance the proliferation, persistence and sustained activity of NK cells. A multi-center Phase 1 clinical trial of NKX101 in patients with relapsed/refractory acute myeloid leukemia (AML) or higher risk myelodysplastic syndromes (MDS) is currently enrolling. Additional information about the clinical trial is available on ClinicalTrials.gov, identifier NCT04623944.

About NKX019NKX019 is an investigational, off-the-shelf cancer immunotherapy that uses natural killer (NK) cells derived from the peripheral blood of healthy donors and engineered with a chimeric antigen receptor (CAR) targeting the CD19 antigen and membrane-bound IL15. CD19 antigen is a B-cell marker and validated target for B cell cancer therapies. NKX019 uses the CAR to target and bind to CD19, leading to an immune response that eliminates CD19-expressing cells in preclinical studies. The addition of membrane-bound IL15, a proprietary version of a cytokine for activating NK cell growth, has been shown in preclinical models to enhance the proliferation, persistence and activity of NK cells. Nkarta plans to file an IND application with the FDA in the first quarter of 2021. A Phase 1 clinical trial of NKX019 in patients with advanced relapsed/refractory B cell malignancies is planned to initiate in 2021.

About Nkartas NK Cell TechnologiesNkarta has pioneered a novel discovery and development platform for the engineering and efficient production of allogeneic, off-the-shelf natural killer (NK) cell therapy candidates. The approach harnesses the innate ability of NK cells to recognize and kill tumor cells, and builds upon the important advances in cellular immunotherapy and chimeric antigen receptor (CAR) biology. To enhance the intrinsic activity of NK cells, Nkarta genetically engineers the cells with a CAR that consists of a targeting receptor designed to recognize and bind to specific proteins on the surface of cancerous cells. This receptor is fused to co-stimulatory and signaling domains to amplify cell signaling and NK cell cytotoxicity. Upon binding the target, NK cells become activated and release cytokines that enhance the immune response and cytotoxic granules that lead to killing of the target cell. All of Nkartas NK cell therapy candidates are engineered with a membrane-bound IL15, a proprietary version of a cytokine known for activating NK cell growth, to enhance the persistence and activity of the NK cells.

Nkartas manufacturing process generates an abundant supply of NK cells that, at commercial scale, is expected to be significantly lower in cost than other current allogeneic and autologous cell therapies. Key to this efficiency is the rapid expansion of donor-derived NK cells using a proprietary NKSTIM cell line, leading to the production of hundreds of individual doses from a single manufacturing run. The platform also features the ability to freeze and store CAR NK cells for an extended period of time and is designed to enable immediate, off-the-shelf administration to patients at the point of care.

About NkartaNkarta is a clinical-stage biotechnology company advancing the development of allogeneic, off the shelf natural killer (NK) cell therapies for cancer. By combining its cell expansion and cryopreservation platform with proprietary cell engineering technologies, Nkarta is building a pipeline of cell therapy candidates generated by efficient manufacturing processes, which are engineered to enhance tumor targeting and improve persistence for sustained activity in the body. For more information, please visit the companys website at www.nkartatx.com.

Cautionary Note on Forward-Looking StatementsStatements contained in this press release regarding matters that are not historical facts are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, as amended. Words such as "anticipates," "believes," "expects," "intends," plans, potential, "projects, would and "future" or similar expressions are intended to identify forward-looking statements. Examples of these forward-looking statements include statements concerning: Nkartas expectations regarding its growth, strategy, progress and timing of its preclinical studies and clinical trials for NKX101 and NKX019, including its regulatory plans and the timing of the NKX019 IND and trial initiation; the mechanism of action and activity of Nkartas product candidates; the efficiency and cost of Nkartas manufacturing processes; the number of doses generated from a manufacturing run; Nkartas progress towards in-house clinical GMP capability; the proprietary nature of Nkartas technology; and Nkartas expected cash burn for 2020 and cash runway. Because such statements are subject to risks and uncertainties, actual results may differ materially from those expressed or implied by such forward-looking statements. These risks and uncertainties include, among others: Nkartas limited operating history and historical losses; Nkartas ability to raise additional funding to complete the development and any commercialization of its product candidates; Nkartas dependence on the success of its co-lead product candidates, NKX101 and NKX019; that Nkarta may be delayed in initiating, enrolling or completing any clinical trials; competition from third parties that are developing products for similar uses; Nkartas ability to obtain, maintain and protect its intellectual property; Nkartas dependence on third parties in connection with manufacturing, clinical trials and pre-clinical studies; and risks relating to the impact on our business of the COVID-19 pandemic or similar public health crises.

These and other risks are described more fully in Nkartas filings with theSecurities and Exchange Commission(SEC), including the Risk Factors section of Nkartas final prospectus for its initial public offering, filed with the SEC on July 13, 2020, Nkartas Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2020, filed with theSEConAugust 20, 2020, Nkartas Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2020, filed with the SEC on November 12, 2020, and our other documents subsequently filed with or furnished to theSEC. All forward-looking statements contained in this press release speak only as of the date on which they were made. Except to the extent required by law, Nkarta undertakes no obligation to update such statements to reflect events that occur or circumstances that exist after the date on which they were made.

Nkarta, Inc.Condensed Statements of Operations(in thousands, except share and per share data)(Unaudited)

Three Months Ended Nine Months Ended September30, September30, 2020 2019 2020 2019 Collaboration $ ? $ ? $ ? $ 115 revenueOperating expensesResearch and 9,828 4,620 24,950 10,535 developmentGeneral and 3,918 1,289 8,560 3,281 administrativeTotaloperating 13,746 5,909 33,510 13,816 expensesLoss from (13,746 ) (5,909 ) (33,510 ) (13,701 ) operationsOther income(expense), net:Change in fairvalue ofpreferred ? 3,383 (40,163 ) 3,383 stock purchaserightliabilityOther income 53 (142 ) 209 (271 ) (expense), netTotal otherincome 53 3,241 (39,954 ) 3,112 (expense), netNet loss $ (13,693 ) $ (2,668 ) $ (73,464 ) $ (10,589 ) Net loss pershare, basic $ (0.44 ) $ (1.75 ) $ (6.39 ) $ (7.45 ) and dilutedWeightedaverage sharesused tocompute net 30,981,441 1,528,510 11,499,327 1,421,882 loss pershare, basicand diluted

Nkarta, Inc.Condensed Balance Sheets(in thousands)(Unaudited)

September30, December31, 2020 2019Assets Cash, cash equivalents, restricted cash and $ 330,172 $ 37,259 short-term investmentsProperty and equipment, net 9,180 3,080 Operating lease right-of-use assets 8,763 7,144 Other assets 4,180 929 Total assets $ 352,295 $ 48,412 Liabilities and stockholders' equity (deficit) Preferred stock purchase right liability $ ? $ 1,478 Operating lease liabilities 9,135 7,296 Other liabilities 8,179 5,305 Total liabilities 17,314 14,079 Convertible preferred stock ? 59,815 Stockholders? equity (deficit) 334,981 (25,482 ) Total liabilities and stockholders? equity $ 352,295 $ 48,412 (deficit)

Nkarta Media/Investor Contact:Greg MannNkarta, Inc.gmann@nkartatx.com