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aTyr Pharma, Inc. (ATYR) short interest & options flow

NASDAQ

ATYR is the week's most dramatic biotech wreckage — a 44% single-day collapse that leaves the stock at $0.53, down 37% on the week and 36% over the past month. The trigger was blunt. On May 11, aTyr Pharma announced a new Phase 3 trial of efzofitimod in pulmonary sarcoidosis, designed after input from an FDA Type C meeting. For a stock that had already suffered a Phase 3 failure in…

$0.17-1.32% 1d-20.07% 1w-52.70% 1mClose: 19 Oct 2026

Short interest % of float: High
Cost to borrow: Dropping
Availability: Rising
Put / call ratio

Next earnings: 6 Nov 2026

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Key data as of 20 Oct 2026

ATYR news and analysis

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