NKTX

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EX-99.1

Exhibit 99.1

Nkarta Reports Second Quarter 2026 Financial Results and Corporate Highlights

• Enrollment continues across all indications in Ntrust-1 and Ntrust-2 at the 4 billion cell dose level (12 billion cells in 3-dose cycle)

• Initial clinical data from Ntrust-1 and Ntrust-2 expected to be presented at a medical conference in 2026

• Cash balance of $243.2 million on June 30, 2026, including cash, cash equivalents and investments, expected to fund operations into 2029

SOUTH SAN FRANCISCO, Calif., August 10, 2026 (GLOBE NEWSWIRE) -- Nkarta, Inc. (Nasdaq: NKTX), a clinical-stage biotechnology company developing engineered natural killer (NK) cell therapies to treat autoimmune diseases, today reported financial results for the second quarter ended June 30, 2026.

“Expanding access to NKX019 in the communities where autoimmune patients already receive care is central to how we're advancing this program," said Paul J. Hastings, Chief Executive Officer of Nkarta. "This quarter, we continued to enroll patients across all indications in Ntrust-1 and Ntrust-2 at the 4 billion cell dose level. Following our recent agreement with the FDA on outpatient dosing, we have begun administrating NKX019 through our expanding network of community-based sites, with re-dosing available, if needed, to patients in both trials. We look forward to presenting our initial clinical dataset from Ntrust-1 and Ntrust-2 at a medical conference in 2026.”

NKX019 Clinical Program Progress and Upcoming Milestones

• Enrollment continues across Ntrust-1 and Ntrust-2, our multi-center, open-label, dose-escalation clinical trials evaluating NKX019 in multiple autoimmune diseases.

• Outpatient dosing is underway within our network of community-based sites, broadening patient access beyond those who can travel to academic medical centers.

• Patients are being dosed at 4 billion cells per dose x 3 doses (12 billion cells total) across all indications in Ntrust-1 and Ntrust-2.

• Initial clinical data from Ntrust-1 and Ntrust-2 are planned for presentation at a medical conference in 2026.

Second Quarter 2026 Financial Highlights

• Nkarta had cash, cash equivalents, restricted cash, and investments in marketable securities of $243.2 million as of June 30, 2026.

• Research and development (R&D) expenses were $29.0 million for the second quarter of 2026. Non-cash stock-based compensation expense included in R&D expense was $0.7 million for the second quarter of 2026.

• General and administrative (G&A) expenses were $14.1 million for the second quarter of 2026. Non-cash stock-based compensation expense included in G&A expense was $1.1 million for the second quarter of 2026.

• Net loss was $40.4 million, or $0.54 per basic and diluted share, for the second quarter of 2026. This net loss includes non-cash charges of $11.8 million that consisted primarily of share-based compensation of $1.9 million, depreciation of $2.7 million, and impairment of right-of-use assets, leasehold improvements and other equipment of $8.0 million.

Financial Guidance

• Nkarta expects its current cash and cash equivalents to fund its current operating plan into 2029.

About the Ntrust℠ Clinical Trials in Autoimmune Disease

Ntrust-1 (NCT06557265) and Ntrust-2 (NCT06733935) are multi-center, open label, dose escalation clinical trials in patients with autoimmune disease receiving lymphodepletion followed by CD19-targeted CAR-NK cell therapy. Both trials will assess the safety of NKX019 in people living with autoimmune diseases as well as its potential to achieve durable remission via a “reset” of the immune system through the elimination of pathogenic B cells.

The Ntrust trials are enrolling up to 12 patients per dose level per disease indication across systemic sclerosis, idiopathic inflammatory myopathy, ANCA-associated vasculitis, rheumatoid arthritis, lupus nephritis, and primary membranous nephropathy. Additional participants may be enrolled if needed to refine patient populations for further study.

In both studies, patients now receive a three-dose cycle of NKX019 on Days 0, 3, and 7 following lymphodepletion with fludarabine and cyclophosphamide or cyclophosphamide alone, if they have significant cytopenia at baseline. Leveraging the engineering of NKX019, no patients in either trial will receive supplemental cytokines or antibody-based therapeutics. This approach is designed to evaluate the single-agent activity of NKX019 and facilitate a more rapid path to regulatory approval. Patients in both trials may also receive additional cycles, if needed, to restore response or enable a deeper response.

About NKX019

NKX019 is an allogeneic, cryopreserved, off-the-shelf immunotherapy candidate that uses natural killer (NK) cells derived from the peripheral blood of healthy adult donors. It is engineered with a humanized CD19-directed chimeric antigen receptor (CAR) for enhanced cell targeting and a proprietary, membra

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EX-99.1

Exhibit 99.1

Nkarta Reports First Quarter 2026 Financial Results and Corporate Highlights

• Enrollment ongoing at 4 billion cell dose level (12 billion cells in 3-dose cycle) across all indications in Ntrust-1 and Ntrust-2

• Regulatory agreement supports expansion into community-based settings with outpatient dosing to reduce patient burden

• Initial clinical data from Ntrust-1 and Ntrust-2 expected to be presented at a medical meeting in 2026

• Cash balance of $266.7 million on March 31, 2026, including cash, cash equivalents and investments, expected to fund operations into 2029

SOUTH SAN FRANCISCO, Calif., May 12, 2026 -- Nkarta, Inc. (Nasdaq: NKTX), a clinical-stage biotechnology company developing engineered natural killer (NK) cell therapies to treat autoimmune diseases, today reported financial results for the first quarter ended March 31, 2026.

“Putting patients first and providing access to care in a familiar setting close to home matters” said Paul J. Hastings, Chief Executive Officer of Nkarta. “In early April, we reached agreement with the FDA to amend our protocol to allow outpatient dosing in community settings as well as the option to re-dose patients if needed, the removal of overnight monitoring requirements, and the expansion of the Ntrust-2 study to include patients with rheumatoid arthritis. IRB approval of our protocol amendments has been secured across multiple sites, with additional approvals underway. These advancements will enable us to expand patient access beyond urban hubs and major academic centers by engaging community research centers and local rheumatology practices in the neighborhoods where most patients live. We look forward to providing our initial dataset in 2026.”

NKX019 Clinical Program Progress and Upcoming Milestones

• Enrollment continues across Ntrust-1 and Ntrust-2, our multi-center, open-label, dose-escalation clinical trials evaluating NKX019 in multiple autoimmune diseases.

• IRB approval of our protocol amendments has been secured across multiple sites on outpatient dosing, re-dosing, ending overnight monitoring, and adding RA to Ntrust-2.

• Patients are being dosed at 4 billion cells per dose x 3 doses (12 billion cells total) across all indications in Ntrust-1 and Ntrust-2.

• Initial clinical data from Ntrust-1 and Ntrust-2 are planned for presentation at a medical conference in 2026.

First Quarter 2026 Financial Highlights

• Nkarta had cash, cash equivalents, restricted cash, and investments in marketable securities of $266.7 million as of March 31, 2026.

• Research and development (R&D) expenses were $25.0 million for the first quarter of 2026. Non-cash stock-based compensation expense included in R&D expense was $0.7 million for the first quarter of 2026.

• General and administrative (G&A) expenses were $5.9 million for the first quarter of 2026. Non-cash stock-based compensation expense included in G&A expense was $1.2 million for first quarter of 2026.

• Net loss was $27.8 million, or $0.37 per basic and diluted share, for the first quarter of 2026. This net loss includes non-cash charges of $3.4 million that consisted primarily of share-based compensation and depreciation expenses.

Financial Guidance

• Nkarta expects its current cash and cash equivalents to fund its current operating plan into 2029.

About the Ntrust℠ Clinical Trials in Autoimmune Disease

Ntrust-1 (NCT06557265) and Ntrust-2 (NCT06733935) are multi-center, open label, dose escalation clinical trials in patients with autoimmune disease receiving lymphodepletion followed by CD19-targeted CAR-NK cell therapy. Both trials will assess the safety of NKX019 in people living with autoimmune diseases as well as its potential to achieve durable remission via a “reset” of the immune system through the elimination of pathogenic B cells.

The Ntrust trials are enrolling up to 12 patients per dose level per disease indication across systemic sclerosis, idiopathic inflammatory myopathy, ANCA-associated vasculitis, rheumatoid arthritis, lupus nephritis, and primary membranous nephropathy. Additional participants may be enrolled if needed to refine patient populations for further study.

In both studies, patients now receive a three-dose cycle of NKX019 on Days 0, 3, and 7 following lymphodepletion with fludarabine and cyclophosphamide or cyclophosphamide alone, if they have significant cytopenia at baseline. Leveraging the engineering of NKX019, no patients in either trial will receive supplemental cytokines or antibody-based therapeutics. This approach is designed to evaluate the single-agent activity of NKX019 and facilitate a more rapid path to regulatory approval. Patients in Ntrust-1 may also receive additional cycles, if needed, to restore response or enable a deeper response.

About NKX019

2

NKX019 is an allogeneic, cryopreserved, off-the-shelf immunotherapy candidate that uses natural killer (NK) cells derived from the peripheral

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EX-99.1

Exhibit 99.1

Nkarta Reports Fourth Quarter and Full Year 2025 Financial Results and Corporate Highlights

• Dose escalation for NKX019 advanced to 4 billion cells per dose on days 0, 3 and 7 for a total of 12 billion cells per cycle

• Initial clinical data from Ntrust-1 and Ntrust-2 targeted for presentation at a medical conference in 2026

• Cash balance of $295.1 million on December 31, 2025, including cash, cash equivalents and investments, is expected to fund operations into 2029

SOUTH SAN FRANCISCO, Calif., March 25, 2026 -- Nkarta, Inc. (Nasdaq: NKTX), a clinical-stage biotechnology company developing engineered natural killer (NK) cell therapies to treat autoimmune diseases, today reported financial results for the fourth quarter and year ended December 31, 2025.

“2025 was a year of strategic importance for Nkarta as we onboarded a clinical team with deep autoimmune experience, right-sized our workforce to be a responsible steward of investor capital, and continued to advance our CAR-NK cell therapy platform through dose escalation in the clinic,” said Paul J. Hastings, Chief Executive Officer of Nkarta. “Thoughtfully leveraging our safety data, we are now dosing patients at 4 billion cells in a three-dose cycle for a total of 12 billion cells as we look to maximize the depth and durability of B-cell depletion and clinical response, positioning us to unlock the full potential of NKX019 for people living with autoimmune disease.”

“We look forward to sharing a comprehensive clinical update from Ntrust-1 and Ntrust-2 later this year with the aim of presenting a meaningful data set at a medical conference. With cash projected to fund operations into 2029, we remain focused on disciplined clinical execution as we continue enrollment in our Ntrust-1 and Ntrust-2 clinical programs.”

NKX019 Clinical Program Progress and Upcoming Milestones

• Enrollment continued across Ntrust-1 and Ntrust-2, our multi-center, open-label, dose-escalation clinical trials evaluating NKX019 in multiple autoimmune diseases.

• Patients are now being dosed at 4 billion cells per dose as part of ongoing dose escalation.

• Enrollment remains open in both investigator-sponsored trials of NKX019 in generalized myasthenia gravis and systemic lupus erythematosus.

• Initial clinical data from Ntrust-1 and Ntrust-2 are planned for presentation at a medical conference later this year.

Fourth Quarter and Full Year 2025 Financial Highlights

• Nkarta had cash, cash equivalents, restricted cash, and investments in marketable securities of $295.1 million as of December 31, 2025.

• Research and development (R&D) expenses were $90.4 million for the full year 2025 and $25.3 million for the fourth quarter of 2025. Non-cash stock-based compensation expense included in R&D expense was $3.2 million for the full year 2025 and $0.7 million for the fourth quarter of 2025.

• General and administrative (G&A) expenses were $31.6 million for the full year 2025 and $5.7 million for the fourth quarter of 2025. Non-cash stock-based compensation expense included in G&A expense was $5.4 million for the full year 2025 and $1.2 million for the fourth quarter of 2025.

• Net loss was $104.1 million, or $1.41 per basic and diluted share, for the full year 2025. This net loss includes non-cash charges of $14.4 million that consisted primarily of share-based compensation, right-of-use asset impairment and depreciation expenses. Net loss was $27.4 million, or $0.37 per basic and diluted share, for the fourth quarter of 2025. This net loss includes non-cash charges of $3.3 million that consisted primarily of share-based compensation and depreciation expenses.

Financial Guidance

• Nkarta expects its current cash and cash equivalents to fund its current operating plan into 2029.

About the Ntrust℠ Clinical Trials in Autoimmune Disease

Ntrust-1 (NCT06557265) and Ntrust-2 (NCT06733935) are multi-center, open label, dose escalation clinical trials in patients with autoimmune disease receiving lymphodepletion followed by CD19-targeted CAR-NK cell therapy. Both trials will assess the safety of NKX019 in people living with autoimmune diseases as well as its potential to achieve durable remission via a “reset” of the immune system through the elimination of pathogenic B cells.

The Ntrust trials are enrolling up to 12 patients per dose level per disease indication across systemic sclerosis, idiopathic inflammatory myopathy, ANCA-associated vasculitis, lupus nephritis, and primary membranous nephropathy.

In both studies, patients now receive a three-dose cycle of NKX019 on Days 0, 3, and 7 following lymphodepletion with fludarabine and cyclophosphamide or cyclophosphamide alone, if they have significant cytopenia at baseline. Leveraging the engineering of NKX019, no patients in either trial will receive supplemental cytokines or antibody-based therapeutics. This approach is designed to evaluate the single-agent activity