Exhibit 99.1 IMMEDIATE RELEASE Contact: Ashlee Dunston Director, Investor Relations and Public Affairs adunston@atyrpharma.com aTyr Pharma Announces First Quarter 2024 Results and Provides Corporate Update Phase 3 EFZO-FIT™ study of efzofitimod in pulmonary sarcoidosis expected to complete enrollment in the second quarter of 2024. Ended the first quarter 2024 with $87.7 million in cash, cash equivalents, restricted cash and investments. SAN DIEGO – May 2, 2024 – aTyr Pharma, Inc. (Nasdaq: LIFE) (“aTyr” or t ...