aTyr Pharma, Inc.
Ownership
Ownership Structure
Who owns aTyr Pharma, Inc. (ATYR)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 99.6% of the shares are freely tradable; institutional investors hold 48.6%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Federated Hermes Inc | 8.68 | 8,509,678 | -19.0 | 06/30/2026 |
| Vanguard Capital Management, LLC | 3.88 | 3,808,091 | -0.1 | 06/30/2026 |
| Kalehua Capital Management LLC | 3.65 | 3,576,334 | +0.0 | 06/30/2026 |
| GSA Capital Partners LLP | 3.52 | 3,454,863 | +105.1 | 06/30/2026 |
| AQR Capital Management LLC | 2.66 | 2,610,548 | +426.3 | 06/30/2026 |
| FMR Inc | 2.52 | 2,471,418 | -83.2 | 06/30/2026 |
| BlackRock Inc | 1.86 | 1,827,332 | -71.6 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Federated Hermes Kaufmann R | 4.45 | 4,367,290 | -21.8 | 06/30/2026 |
| Federated Hermes Kaufmann Small Cap A | 4.14 | 4,061,288 | -15.5 | 06/30/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 2.70 | 2,650,788 | +0.0 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: November 2, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.