Group 1 - aTyr Pharma, Inc. is a clinical stage biotechnology company focused on developing first-in-class medicines from its proprietary tRNA synthetase platform [1][2] - The company will present at the Leerink Partners Global Healthcare Conference on March 10, 2025, at 1:40pm EDT in Miami, FL [1] - aTyr's lead therapeutic candidate, efzofitimod, is an immunomodulator in clinical development for treating interstitial lung disease, which involves inflammation and progressive fibrosis of the lungs [2] Group 2 - The company leverages evolutionary intelligence to translate tRNA synthetase biology into new therapies for fibrosis and inflammation [2] - aTyr's discovery platform aims to uncover therapeutic intervention points by exploring signaling pathways from its proprietary library of domains derived from all 20 tRNA synthetases [2] - Management will be available for one-on-one meetings with registered investors during the conference [1]

Clinical Development and Presentations - The company will present three posters for its lead therapeutic candidate, efzofitimod, at the American Thoracic Society (ATS) 2025 International Conference [1] - The posters include details on the EFZO-FIT trial design, real-world treatment patterns, and the incidence, prevalence, and mortality of pulmonary sarcoidosis in the US [2] - The EFZO-FIT trial is the largest placebo-controlled trial in pulmonary sarcoidosis, with topline data expected in Q3 2025 [1][2] About Efzofitimod - Efzofitimod is a first-in-class biologic immunomodulator in clinical development for the treatment of interstitial lung disease (ILD) [3] - It selectively modulates activated myeloid cells through neuropilin-2 to resolve inflammation without immune suppression and potentially prevent fibrosis progression [3] - The company is investigating efzofitimod in the global Phase 3 EFZO-FIT study for pulmonary sarcoidosis and the Phase 2 EFZO-CONNECT study for systemic sclerosis-related ILD [3] About aTyr - aTyr is a clinical-stage biotechnology company focused on translating tRNA synthetase biology into new therapies for fibrosis and inflammation [4] - The company's discovery platform leverages a proprietary library of domains derived from all 20 tRNA synthetases to uncover novel signaling pathways [4] - Efzofitimod is the lead therapeutic candidate, targeting immune-mediated disorders that cause inflammation and progressive fibrosis in the lungs [4]

Core Points - aTyr Pharma, Inc. is a clinical stage biotechnology company focused on developing first-in-class medicines from its proprietary tRNA synthetase platform [1][3] - The company will present at the 43rd Annual J.P. Morgan Healthcare Conference scheduled for January 13-16, 2025, in San Francisco, CA [1][2] - The lead therapeutic candidate of aTyr is efzofitimod, an immunomodulator in clinical development for treating interstitial lung disease [3] Presentation Details - The presentation will take place on January 16, 2025, at 8:15 am PST [2] - Company management will be available for one-on-one meetings with registered investors during the conference [2] - A webcast of the presentation will be available on the company's investor section of the website, with a replay accessible for at least 30 days post-event [2] Company Overview - aTyr leverages evolutionary intelligence to develop therapies targeting fibrosis and inflammation through its tRNA synthetase biology [3] - The company’s discovery platform aims to identify therapeutic intervention points by exploring signaling pathways from its proprietary library of tRNA synthetase domains [3] - Interstitial lung disease, the focus of aTyr's lead candidate, is characterized by immune-mediated disorders leading to lung inflammation and progressive fibrosis [3]

Core Insights - aTyr Pharma, Inc. has appointed Eric Benevich to its Board of Directors, effective December 10, 2024, to support its commercialization efforts [1][2] - Mr. Benevich brings over 30 years of commercial experience in the pharmaceutical industry, having held significant roles at various biopharmaceutical companies [2] - aTyr is focused on developing first-in-class medicines from its proprietary tRNA synthetase platform, with its lead candidate being efzofitimod for treating interstitial lung disease [3] Company Overview - aTyr Pharma is a clinical stage biotechnology company that utilizes evolutionary intelligence to develop therapies targeting fibrosis and inflammation [3] - The company’s discovery platform aims to identify therapeutic intervention points by exploring signaling pathways from its library of tRNA synthetase-derived domains [3] - The lead therapeutic candidate, efzofitimod, is an immunomodulator currently in clinical development for immune-mediated disorders affecting the lungs [3]

SAN DIEGO, Nov. 15, 2024 (GLOBE NEWSWIRE) -- 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 that the Company will present two posters related to its tRNA synthetase candidate ATYR0101 at the Keystone Symposia on Fibrosis: Inflammation, Drivers, and Therapeutic Resolution, which is scheduled to take place December 8 – 11, 2024, ...

Efzofitimod Clinical Development and Trials - The company's lead therapeutic candidate, efzofitimod, has shown positive results in a Phase 1b/2a clinical trial for pulmonary sarcoidosis, with consistent dose response and improvements in key efficacy endpoints compared to placebo[75][76] - The global pivotal Phase 3 EFZO-FIT study for efzofitimod in pulmonary sarcoidosis completed enrollment of 268 patients, exceeding the target of 264, with topline data expected in Q3 2025[77] - The company initiated an Individual Patient Expanded Access Program for efzofitimod, allowing patients who complete the Phase 3 EFZO-FIT study to receive treatment outside the clinical trial[78] - A Phase 2 proof-of-concept study (EFZO-CONNECT) for efzofitimod in SSc-ILD was amended to include a 24-week open-label extension, with interim data expected in Q2 2025[79] Collaboration and Licensing Agreements - The company has a collaboration with Kyorin Pharmaceutical for the development and commercialization of efzofitimod in Japan, generating $20 million in upfront and milestone payments, with potential for an additional $155 million and tiered royalties[80] - Kyorin Agreement milestone payment of $10.0 million triggered by the first patient dosing in Japan for the EFZO-FIT study, recorded as revenue in 2022 and received in February 2023[91] - Total upfront and milestone payments from Kyorin Agreement to date: $20.0 million, with potential for an additional $155.0 million upon achieving development, regulatory, and sales milestones[91] Pipeline and Therapeutic Candidates - The company has identified target receptors for domains of two additional tRNA synthetases, forming the basis of new pipeline candidates[83] - ATYR0101, a fusion protein derived from aspartyl-tRNA synthetase, shows potential for treating multiple fibrotic diseases by inducing apoptosis of myofibroblasts in a TGFβ-dependent manner[84] - ATYR0750, a fusion protein derived from alanyl-tRNA synthetase, is a novel ligand to FGFR4, with potential therapeutic benefits in diseases related to inflammation and fibrosis[85] Financial Performance and Cash Position - As of September 30, 2024, the company had $68.9 million in cash, cash equivalents, restricted cash, and available-for-sale investments, sufficient to meet material cash requirements for at least one year[87] - The company raised $48.1 million in a February 2023 public offering and $21.4 million through an at-the-market offering program in the first nine months of 2024[89][90] - Net cash used in operating activities for the nine months ended September 30, 2024: $56.0 million, primarily due to increased costs for EFZO-FIT and EFZO-CONNECT studies and BLA preparation[92] - Net cash provided by investing activities for the nine months ended September 30, 2024: $23.3 million, driven by timing differences in investment activities[93] - Net cash provided by financing activities for the nine months ended September 30, 2024: $21.0 million, primarily from the issuance of common stock[94] Expenses and Cost Analysis - Research and development expenses expected to increase, primarily driven by clinical development and manufacturing of efzofitimod[106] - Research and development expenses increased to $14.8 million in Q3 2024, up from $10.3 million in Q3 2023, primarily due to a $3.5 million increase in efzofitimod expenses[110] - Efzofitimod expenses rose to $11.9 million in Q3 2024, compared to $8.5 million in Q3 2023, driven by the advancement of the EFZO-FIT study and increased manufacturing efforts[110] - General and administrative expenses increased to $3.3 million in Q3 2024, up from $2.6 million in Q3 2023, mainly due to higher personnel-related costs[111] - Research and development expenses for the nine months ended September 30, 2024, were $42.1 million, up from $29.5 million in 2023, with a $12.5 million increase in efzofitimod expenses[114] - General and administrative expenses for the nine months ended September 30, 2024, were $10.2 million, compared to $9.8 million in 2023, due to higher personnel-related costs and professional fees[115] - Efzofitimod expenses for the nine months ended September 30, 2024, were $34.2 million, up from $21.7 million in 2023, driven by the EFZO-FIT study and manufacturing efforts[119] - Total research and development expenses for the nine months ended September 30, 2024, were $42.1 million, up from $29.5 million in 2023, with a $12.6 million increase[119] Revenue and Other Income - License and collaboration agreement revenues were $0.2 million for the nine months ended September 30, 2024, down from $0.4 million in the same period in 2023[113] - Other income, net decreased to $0.8 million in Q3 2024, down from $1.3 million in Q3 2023, primarily due to a lower cash balance[112] - Other income, net for the nine months ended September 30, 2024, was $3.0 million, slightly down from $3.3 million in 2023, due to a lower cash balance[116] Corporate Operations and Leasing - Corporate headquarters lease base rent: $5.75 per square foot per month for the first 12 months, with annual upward adjustments of approximately 3.0%[100] - Financing lease liabilities as of September 30, 2024: $1.6 million, with $2.2 million in cash collateral included in restricted cash[101] Accounting and Financial Policies - Critical accounting policies and estimates remain consistent with those disclosed in the 2023 Annual Report[109] - General and administrative expenses include salaries, stock-based compensation, and costs for legal, accounting, and patent maintenance[107]

Financial Performance - Total revenues for Q3 2024 were $0, compared to $353,000 in Q3 2023, indicating a decrease in license and collaboration agreement revenues[12] - Consolidated net loss for Q3 2024 was $17.3 million, compared to a net loss of $11.3 million in Q3 2023[12] - General and administrative expenses for Q3 2024 were $3.3 million, compared to $2.6 million in Q3 2023[12] - Research and development expenses for Q3 2024 were $14.8 million, up from $10.3 million in Q3 2023, reflecting increased clinical trial costs[7] Cash and Investments - Cash and investments as of September 30, 2024, were $68.9 million, down from $101.7 million at the end of 2023[13] - Total assets as of September 30, 2024, were $91.6 million, down from $120.7 million at the end of 2023[13] - The company raised approximately $19.4 million in gross proceeds from an at-the-market offering after Q3 2024[7] Clinical Trials - Enrollment completed in the Phase 3 EFZO-FIT™ study with 268 patients, exceeding the target, and topline data expected in Q3 2025[5] - The Phase 2 EFZO-CONNECT™ study is ongoing, aiming to enroll up to 25 patients with interim data expected in Q2 2025[6] - The efzofitimod program showed statistically significant improvement in corticosteroid relapse rates, as published in the European Respiratory Journal[2]

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-37378 ATYR PHARMA, INC. (Exact name of registrant as specified in its charter) Delaware 20-3435077 (State or other jurisdiction ...

Exhibit 99.1 IMMEDIATE RELEASE Contact: Ashlee Dunston Director, Investor Relations and Public Affairs adunston@atyrpharma.com aTyr Pharma Announces Second Quarter 2024 Results and Provides Corporate Update Phase 3 EFZO-FIT™ study of efzofitimod in pulmonary sarcoidosis enrollment completed with 268 patients; topline data from this 52-week study expected in the third quarter of 2025. Ended the second quarter 2024 with $81.4 million in cash, cash equivalents, restricted cash and investments. SAN DIEGO – Augu ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-37378 ATYR PHARMA, INC. (Exact name of registrant as specified in its charter) Delaware 20-3435077 (State or other jurisdiction ...