ATYR

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2 atyr-ex99_1.htm

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EX-99.1

Exhibit 99.1

Contact:

Ashlee Dunston

Sr. Director, Investor Relations and Public Affairs

adunston@atyrpharma.com

aTyr Pharma Announces Second Quarter 2026 Results, Program Prioritization and Corporate Restructuring to Support Efzofitimod Program in ILD

Company awaiting comments from FDA by the end of August 2026 on protocol submitted for planned Phase 3 study of efzofitimod in patients with pulmonary sarcoidosis.

Workforce reduction of approximately 60% and program prioritization conserves capital and aligns resources on efzofitimod program in ILD.

Enrollment completed in Phase 2 EFZO-CONNECT™ study of efzofitimod in SSc-ILD; topline results expected in the first quarter of 2027.

Ended the second quarter 2026 with $58.9 million in cash, cash equivalents, restricted cash and investments; cash runway into late 2028 based on current operations.

SAN DIEGO – August 7, 2026 – aTyr Pharma, Inc. (Nasdaq: ATYR) (“aTyr” or the “Company”), a clinical stage biotechnology company engaged in the discovery and development of first-in-class medicines from its proprietary tRNA synthetase platform, today announced second quarter 2026 results and a corporate restructuring to prioritize its efzofitimod program in interstitial lung disease (ILD), including pulmonary sarcoidosis and systemic sclerosis (SSc)-related ILD (SSc-ILD).

The program prioritization aims to focus the Company’s resources on advancing its lead asset, efzofitimod, and targeted pipeline development to conserve capital in anticipation of receiving comments from the U.S. Food and Drug Administration (FDA) on the protocol for its planned Phase 3 study of efzofitimod in pulmonary sarcoidosis, a major form of ILD. The Company submitted the protocol in June 2026 and is expecting feedback from the FDA by the end of August 2026.

“We are proactively taking decisive, necessary action to focus our resources on our lead therapeutic candidate, efzofitimod, as we await feedback from the FDA on the protocol we submitted for our planned Phase 3 study in pulmonary sarcoidosis patients with restrictive lung disease. This approach positions aTyr to advance this planned Phase 3 study efficiently and continue completing the Phase 2 EFZO-CONNECT™ study in SSc-ILD,” said Sanjay S. Shukla, M.D., M.S., President and Chief Executive Officer of aTyr. “We remain confident in the potential of efzofitimod to become a meaningful therapy for patients with these forms of ILD, and these changes are essential to our ability to achieve that goal. We are deeply grateful to our dedicated team members for their

outstanding contributions, commitment, and perseverance, including those who have helped advance tRNA synthetase biology over the years.”

Program Prioritization and Corporate Restructuring

• Workforce reduction of approximately 60% will align organizational resources to support the efzofitimod program in ILD in anticipation of comments from the FDA on a protocol submitted for a planned Phase 3 study in pulmonary sarcoidosis and to complete the Phase 2 EFZO-CONNECT™ study in SSc-ILD.

• Jill Broadfoot, aTyr’s Chief Financial Officer (CFO), will step down as of September 30, 2026, and transition to serve as a consultant to the Company. Brandon Yaras, aTyr’s Vice President of Finance, will be appointed as CFO as of October 1, 2026.

• Nancy Denyes, aTyr’s General Counsel, will step down as of September 30, 2026, and transition to serve as a consultant to the Company.

• The Company expects that this restructuring and additional cost saving measures will reduce annualized operating expenses by approximately $13 million, beginning in the fourth quarter of 2026.

Second Quarter 2026 and Subsequent Period Highlights

• Protocol submitted to FDA in June 2026 for planned Phase 3 study in patients with chronic, symptomatic pulmonary sarcoidosis with restrictive lung disease. The Company is expecting feedback from the FDA by the end of August 2026. The Phase 3 trial is expected to be a global, randomized, double-blind, placebo-controlled study to evaluate the efficacy and safety of efzofitimod in patients with moderate to severe pulmonary sarcoidosis. The 54-week study will consist of two parallel cohorts randomized equally to either 5.0 mg/kg efzofitimod or placebo dosed intravenously once every 3 weeks for a total of 17 doses. The study is intended to enroll up to approximately 372 patients with symptomatic pulmonary sarcoidosis with restrictive lung disease who are receiving a stable dose of ≤ 5.0 mg daily oral corticosteroid and/or a background immunosuppressant. All background treatment will remain stable throughout the duration of the study. The primary endpoint of the study will be change from baseline in forced vital capacity (FVC) at week 48 and the key secondary endpoint will be change from baseline in the King’s Sarcoidosis Questionnaire-Lung score at week 48.

• Enrollment completed in the Phase 2 EFZO-CONNECT™ study to evaluate th

EX-99.1

2 atyr-ex99_1.htm

EX-99.1

EX-99.1

Exhibit 99.1

Contact:

Ashlee Dunston

Sr. Director, Investor Relations and Public Affairs

adunston@atyrpharma.com

aTyr Pharma Announces First Quarter 2026 Results and Provides Corporate Update

Company to continue development of efzofitimod in pulmonary sarcoidosis following Type C meeting with the FDA.

Company plans to submit an IND in June 2026 for a Phase 3 study of efzofitimod in patients with chronic, symptomatic pulmonary sarcoidosis with restrictive lung disease utilizing FVC as primary endpoint and KSQ-Lung as key secondary endpoint.

On track to complete enrollment in Phase 2 EFZO-CONNECT™ study of efzofitimod in SSc-ILD in the first half of 2026.

Ended the first quarter 2026 with $68.3 million in cash, cash equivalents, restricted cash and investments.

SAN DIEGO – May 15, 2026 – aTyr Pharma, Inc. (Nasdaq: ATYR) (“aTyr” or the “Company”), a clinical stage biotechnology company engaged in the discovery and development of first-in-class medicines from its proprietary tRNA synthetase platform, today announced first quarter 2026 results and provided a corporate update.

“2026 is off to a productive start, as we now have a clear path forward for efzofitimod in pulmonary sarcoidosis, a major form of interstitial lung disease (ILD), following our recent Type C meeting with the U.S. Food and Drug Administration (FDA),” said Sanjay S. Shukla, M.D., M.S., President and Chief Executive Officer of aTyr. “Based on feedback from the FDA, we plan to file an investigational new drug (IND) application next month for a new Phase 3 study in patients with chronic, symptomatic pulmonary sarcoidosis with restrictive lung disease utilizing forced vital capacity (FVC) as the primary endpoint of the study and the King’s Sarcoidosis Questionnaire (KSQ)-Lung score as a key secondary endpoint. We look forward to the continued advancement of efzofitimod in this form of ILD where there remains a high unmet medical need.”

First Quarter 2026 and Subsequent Period Highlights

• Announced plans to continue the development of efzofitimod in pulmonary sarcoidosis following a Type C meeting with the FDA to review the results of the Phase 3 EFZO-FIT™ study and determine the path forward for efzofitimod in pulmonary sarcoidosis. The Company plans to file an IND in June 2026 for a new Phase 3 study in patients with chronic, symptomatic pulmonary sarcoidosis with restrictive lung disease utilizing FVC as the primary endpoint of the study and the

KSQ-Lung score as the key secondary endpoint. The Phase 3 trial is expected to be a global, randomized, double-blind, placebo-controlled study to evaluate the efficacy and safety of efzofitimod in patients with moderate to severe pulmonary sarcoidosis. The 54-week study will consist of two parallel cohorts randomized equally to either 5.0 mg/kg efzofitimod or placebo dosed intravenously once every 3 weeks for a total of 17 doses. The study is intended to enroll up to approximately 372 patients with symptomatic pulmonary sarcoidosis with restrictive lung disease who are receiving a stable dose of ≤ 5.0 mg daily oral corticosteroid and/or a background immunosuppressant. All background treatment will remain stable throughout the duration of the study. The primary endpoint of the study will be change from baseline in FVC at week 48 and the key secondary endpoint will be change from baseline in the KSQ-Lung score at week 48.

• On track to complete enrollment in the Phase 2 EFZO-CONNECT™ study to evaluate the efficacy, safety and tolerability of efzofitimod in patients with limited or diffuse systemic sclerosis (SSc, or scleroderma)-related ILD (SSc-ILD) in the first half of 2026. This proof-of-concept study is a randomized, double-blind, placebo-controlled, 28-week study consisting of three parallel cohorts randomized 2:2:1 to either 270 mg or 450 mg of efzofitimod or placebo administered intravenously monthly for a total of six doses. The study intends to enroll up to 25 patients at multiple centers in the United States. Promising interim data from the study were reported in the second quarter of 2025.

• Poster related to the Company's investigational new drug candidate, ATYR0101, accepted for presentation at the Extracellular Matrix Pharmacology Congress, which is scheduled to take place June 14 – 17, 2026 in Copenhagen, Denmark. The poster, which is titled, “Natural Asp-tRNA Synthetase Fragment Interacts with LTBP-1 on the ECM Promoting Myofibroblast Apoptosis and Reducing Fibrosis,” presents research indicating that AYTR0101 selectively induces myofibroblast apoptosis via modulation of focal adhesion kinase (FAK) signaling through a novel binding interaction with latent-transforming growth factor beta binding protein 1 (LTBP-1) and results in a significant reduction of fibrosis in lung and kidney models. The poster will be available on the Company’s website once presented.

First Quarter 2026 Financial Highlights and Cash Position

• Cash & I

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aTyr Pharma Advancing tRNA synthetase biology Efzofitimod in Pulmonary Sarcoidosis and Beyond May 11, 2026 © 2026 aTyr Pharma Exhibit 99.1

Forward-Looking Statements The following slides and any accompanying oral presentation contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 and other federal securities laws.  The use of words such as “may,” “might,” “will,” “should,” “expect,” “plan,” “anticipate,” “believe,” “estimate,” “project,” “intend,” “future,” “potential,” “opportunity,” or “continue,” and other similar expressions are intended to identify forward-looking statements.  For example, all statements regarding: the potential therapeutic benefits of proteins derived from tRNA synthetase genes and our product candidates and development programs; the ability to successfully advance our product candidates and undertake certain development activities (such as the initiation of clinical trials, clinical trial enrollment, the conduct of clinical trials and announcement of clinical results) and accomplish certain development goals, and the timing of such events; the potential market opportunity for our product candidates; our ability to receive regulatory approvals for, and commercialize, our product candidates; our ability to identify and discover additional product candidates; potential activities and payments under collaboration agreements; and the ability of our intellectual property portfolio to provide protection are forward-looking statements. All forward-looking statements are based on estimates and assumptions by our management that, although we believe to be reasonable, are inherently uncertain. All forward-looking statements are subject to risks and uncertainties that may cause actual results to differ materially from those that we expected. These risks, uncertainties and other factors are more fully described in our filings with the U.S. Securities and Exchange Commission, including our Annual Report on Form 10-K, our subsequently filed Quarterly Reports on Form 10-Q, and in our other filings. The forward-looking statements in this presentation speak only as of the date of this presentation and neither we nor any other person assume responsibility for the accuracy and completeness of any forward-looking statement. We undertake no obligation to publicly update or revise any forward-looking statement, whether as a result of new information, future events or otherwise, except as required by law. We own various U.S. federal trademark applications and unregistered trademarks, including our company name. All other trademarks or trade names referred to in this presentation are the property of their respective owners. Solely for convenience, the trademarks and trade names in this presentation are referred to without the symbols ® and ™, but such references should not be construed as any indicator that their respective owners will not assert, to the fullest extent under applicable law, their rights thereto. This presentation discusses product candidates that are under clinical study and which have not yet been approved for marketing by the U.S. Food and Drug Administration. No representation is made as to the safety or effectiveness of these product candidates for the uses for which they are being studied. This presentation also contains estimates and other statistical data made by independent parties and by us relating to market size and growth and other data about our industry. This data involved a number of assumptions and limitations, and you are cautioned not to give undue weight to such estimates. In addition, projections, assumptions and estimates of our future performance and the future performance of the markets in which we operate are necessarily subject to a high degree of uncertainty and risk. | © 2026 aTyr Pharma

FDA Type C Meeting Informs Future Efzofitimod Development Background EFZO-FIT missed its primary endpoint but demonstrated a safety profile consistent with previous trials and durable benefit on multiple clinically meaningful, prespecified quality of life measures aTyr was granted a Type C meeting to discuss the EFZO-FIT data, clinical development plan and validation of KSQ-L as a fit-for-purpose endpoint for pulmonary sarcoidosis Discussion focused on: Endpoints (FVC; KSQ-L) Our rationale for FVC as endpoint in target patient population Dosing (Q3W) Safety monitoring Benefit / risk profile FDA Type C Meeting Meeting objective: align on the path forward for efzofitimod in pulmonary sarcoidosis Abbreviations: FDA, Food and Drug Administration; KSQ-L, King’s Sarcoidosis Questionnaire-Lung; FVC, forced vital capacity | © 2026 aTyr Pharma

FDA Type C Meeting Informs Future Efzofitimod Development FDA indicated support for FVC and KSQ-L as clinically meaningful endpoints in pulmonary sarcoidosis FDA indicated FVC to be a direct measure of how patients function FDA indicated KSQ-L to be a dir