aTYR PHARMA INC
ATYR- Exchange
- Nasdaq
- Industry
- Biological Products, (No Diagnostic Substances)
- SEC CIK
- 0001339970
No open-market purchases or sales by aTYR PHARMA INC insiders were filed in the last 90 days; 89 institutions reported holding it in 13F filings for Q2 2026, worth $23.2M in total; no superinvestor holds it.
13F holders, Q3 2025
Institutional positions in aTYR PHARMA INC as of Sep 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 103
- −5 vs. Q2 2025
- Shares held
- 61.9M
- −4.35M (−6.6%) vs. Q2 2025
- Total value
- $43.9M
- −$292.2M (−86.9%) vs. Q2 2025
- New holders
- 34
- 33 more added
- Sold out
- 39
- 25 more reduced
2 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ATYR on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 89 | $23.2M |
| Q1 2026 | 111 | $43.7M |
| Q4 2025 | 84 | $42.1M |
| Q3 2025 | 103 | $43.9M |
| Q2 2025 | 110 | $336.5M |
| Q1 2025 | 87 | $186.5M |
| Q4 2024 | 77 | $198.6M |
| Q3 2024 | 56 | $84.3M |
| Q2 2024 | 47 | $75.1M |
| Q1 2024 | 56 | $81.5M |
| Q4 2023 | 46 | $58.1M |
| Q3 2023 | 41 | $58.7M |
| Q2 2023 | 41 | $77.0M |
| Q1 2023 | 37 | $72.8M |
| Q4 2022 | 36 | $40.2M |
| Q3 2022 | 33 | $57.2M |
| Q2 2022 | 36 | $53.1M |
| Q1 2022 | 41 | $105.0M |
| Q4 2021 | 47 | $153.5M |
| Q3 2021 | 42 | $172.1M |
| Q2 2021 | 29 | $33.8M |
| Q1 2021 | 25 | $26.3M |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding aTYR PHARMA INC; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| FMR LLC | 14,697,995 | $10.6M | 0.00% | +1,347,330+10.1% | Added |
| Rosalind Advisors, Inc. | 1,039,080 | – | – | +1,039,080 | New |
| T. Rowe Price Investment Management, Inc. | 141 | – | – | +141 | New |
| Octagon Capital Advisors LP | 0 | $0 | 0.00% | −3,820,000−100.0% | Sold out |
| Alyeska Investment Group, L.P. | 0 | $0 | 0.00% | −1,412,749−100.0% | Sold out |
| Integral Health Asset Management, LLC | 0 | $0 | 0.00% | −1,050,000−100.0% | Sold out |
| Point72 Asset Management, L.P. | 0 | $0 | 0.00% | −988,677−100.0% | Sold out |
| Erste Asset Management GmbH | 0 | $0 | 0.00% | −600,000−100.0% | Sold out |
| Renaissance Technologies LLC | 0 | $0 | 0.00% | −518,355−100.0% | Sold out |
| Marshall Wace, LLP | 0 | $0 | 0.00% | −511,412−100.0% | Sold out |
| Ally Bridge Group (NY) LLC | 0 | $0 | 0.00% | −287,720−100.0% | Sold out |
| Thoroughbred Financial Services, LLC | 0 | $0 | 0.00% | −210,775−100.0% | Sold out |
| Dauntless Investment Group, LLC | 0 | $0 | 0.00% | −158,402−100.0% | Sold out |
| Parkman Healthcare Partners LLC | 0 | $0 | 0.00% | −150,000−100.0% | Sold out |
| Citadel Advisors LLC | 0 | $0 | 0.00% | −119,117−100.0% | Sold out |
| Fred Alger Management, LLC | 0 | $0 | 0.00% | −92,493−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −77,264−100.0% | Sold out |
| Quadrature Capital Ltd | 0 | $0 | 0.00% | −56,022−100.0% | Sold out |
| Knott David M Jr | 0 | $0 | 0.00% | −50,367−100.0% | Sold out |
| Polar Asset Management Partners Inc. | 0 | $0 | 0.00% | −40,500−100.0% | Sold out |
| Diametric Capital, LP | 0 | $0 | 0.00% | −37,012−100.0% | Sold out |
| Kingswood Wealth Advisors, LLC | 0 | $0 | 0.00% | −36,000−100.0% | Sold out |
| Manufacturers Life Insurance Company, The | 0 | $0 | 0.00% | −32,477−100.0% | Sold out |
| Virtu Financial LLC | 0 | $0 | 0.00% | −31,959−100.0% | Sold out |
| Omers Administration Corp | 0 | $0 | 0.00% | −31,800−100.0% | Sold out |
| D.A. Davidson & Co. | 0 | $0 | 0.00% | −31,650−100.0% | Sold out |
| LPL Financial LLC | 0 | $0 | 0.00% | −26,335−100.0% | Sold out |
| Kennedy Capital Management, Inc. | 0 | $0 | 0.00% | −21,514−100.0% | Sold out |
| Colony Group, LLC | 0 | $0 | 0.00% | −20,000−100.0% | Sold out |
| Creative Planning | 0 | $0 | 0.00% | −14,509−100.0% | Sold out |
| Prelude Capital Management, LLC | 0 | $0 | 0.00% | −14,481−100.0% | Sold out |
| Oxford Asset Management LLP | 0 | $0 | 0.00% | −13,734−100.0% | Sold out |
| Catalyst Funds Management Pty Ltd | 0 | $0 | 0.00% | −10,700−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −9,203−100.0% | Sold out |
| Twin Peaks Wealth Advisors, LLC | 0 | $0 | 0.00% | −1,815−100.0% | Sold out |
| Nisa Investment Advisors, LLC | 0 | $0 | 0.00% | −1,203−100.0% | Sold out |
| Proffitt & Goodson Inc | 0 | $0 | 0.00% | −880−100.0% | Sold out |
| Sachetta, LLC | 0 | $0 | 0.00% | −830−100.0% | Sold out |
| Huntington National Bank | 0 | $0 | 0.00% | −700−100.0% | Sold out |
| NBC Securities, Inc. | 0 | $0 | 0.00% | −700−100.0% | Sold out |
| Garde Capital, Inc. | 0 | $0 | 0.00% | −200−100.0% | Sold out |
| Rothschild Investment LLC | 0 | $0 | 0.00% | −90−100.0% | Sold out |
| Avantax Advisory Services, Inc. | – | – | – | – | Not filed |
| CIBC World Markets Corp | – | – | – | – | Not filed |