ATYR — aTYR PHARMA INC
Price · 2024-08-26 → 2026-08-21
499 daily closes shownAnonymous view is capped at two years of history. A free account extends it to five, and Pro opens the whole archive back to 2016-01-04.
Performance
Technicals
Others in Healthcare
Measured signals that fired on ATYR
| date | signal | measured base rate |
|---|---|---|
| 2026-05-15 | Institutional holders jumped in a quarter ownership | -0.52% over 21 days · t = -0.38 · n = 1,553 not distinguishable from its control group |
Excess return against a matched control group, on a point-in-time universe that includes delisted companies. Most families do not survive that. How the measurement works →
Insider transactions (Form 4)
| date | insider | what | shares | price | value |
|---|---|---|---|---|---|
| 2026-05-27 | SCHIMMEL PAUL Director | Open-market purchase | 100.0K | 0.50 | 49.6K |
| 2026-02-04 | Shukla Sanjay President and CEO | Open-market sale | 3.7K | 0.98 | 3.7K |
| 2026-02-04 | Broadfoot Jill Marie Chief Financial Officer | Open-market sale | 1.6K | 0.98 | 1.5K |
| 2026-02-04 | DENYES NANCY General Counsel | Open-market sale | 1.1K | 0.98 | 1.1K |
| 2026-02-03 | DENYES NANCY General Counsel | Option exercise | 2.7K | — | — |
| 2026-02-03 | Shukla Sanjay President and CEO | Option exercise | 10.4K | — | — |
| 2026-02-03 | Broadfoot Jill Marie Chief Financial Officer | Option exercise | 3.8K | — | — |
| 2025-10-09 | SCHIMMEL PAUL Director | Open-market purchase | 318.0K | 0.94 | 298.9K |
| 2025-10-08 | SCHIMMEL PAUL Director | Open-market purchase | 682.0K | 0.90 | 613.8K |
| 2025-03-17 | Gross Jane A Director | Open-market purchase | 3.8K | 4.00 | 15.0K |
Open-market purchases (code P) are the informative ones. Grants, option exercises and tax withholding are compensation mechanics, not decisions. How to read a Form 4 →
Largest institutional holders
| manager | value | shares |
|---|---|---|
| FMR LLC | 11.5M | 14.7M |
| FEDERATED HERMES, INC. | 8.2M | 10.5M |
| BlackRock, Inc. | 5.0M | 6.4M |
| UBS Group AG | 3.0M | 3.9M |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.0M | 3.8M |
| GEODE CAPITAL MANAGEMENT, LLC | 1.9M | 2.4M |
| STATE STREET CORP | 1.4M | 1.8M |
| MILLENNIUM MANAGEMENT LLC | 1.3M | 1.6M |
| MORGAN STANLEY | 955.9K | 1.2M |
| TWO SIGMA INVESTMENTS, LP | 892.8K | 1.1M |
13F positions as of 2026-03-31, filed up to 45 days after quarter end. Long-only US equity — shorts and derivatives never appear. What 13F does and does not show →
Latest SEC filings
| form | filed | period | |
|---|---|---|---|
| S-8 | 2026-08-07 | — | on EDGAR ↗ |
| 10-Q | 2026-08-07 | 2026-06-30 | on EDGAR ↗ |
| 8-K | 2026-08-07 | 2026-08-07 | on EDGAR ↗ |
| SCHEDULE 13G/A | 2026-08-06 | — | on EDGAR ↗ |
| 8-K | 2026-07-31 | 2026-07-30 | on EDGAR ↗ |
| SCHEDULE 13G/A | 2026-07-27 | — | on EDGAR ↗ |
| SCHEDULE 13G/A | 2026-07-08 | — | on EDGAR ↗ |
| 8-K | 2026-06-08 | 2026-06-03 | on EDGAR ↗ |
Short selling
This is off-exchange short volume, not short interest: it is flow, not position, and 40–50% is normal because market makers short to fill your buy. Why that number misleads →
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