aTyr Pharma
ATYR · NASDAQ
$0.1733+$0.0016 (+0.93%)TodayMarket closed ·
Prev close $0.1717
Who owns ATYR
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 30.2% of ATYR’s shares.
- Federated Hermes Global Investment Management Corp.8.7%
- Vanguard Capital Management, LLC3.9%
- GSA Capital Partners LLP3.5%
- AQR Capital Management, LLC2.7%
- Next 6 largest institutions11.4%
- All other shareholders69.8%
| Holder | Shares | % of shares |
|---|---|---|
| Federated Hermes Global Investment Management Corp. | 8.51M | 8.68% |
| Vanguard Capital Management, LLC | 3.81M | 3.88% |
| GSA Capital Partners LLP | 3.45M | 3.52% |
| AQR Capital Management, LLC | 2.61M | 2.66% |
| Fidelity Management & Research Company LLC | 2.47M | 2.52% |
| Schimmel (Paul R.) | 2.10M | 2.14% |
| Kalehua Capital Management LLC | 1.79M | 1.82% |
| BlackRock Institutional Trust Company, N.A. | 1.76M | 1.80% |
| Jane Street Capital, L.L.C. | 1.72M | 1.76% |
| UBS Financial Services, Inc. | 1.34M | 1.37% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Federated Hermes Kaufmann Fund | 4.37M | 4.45% |
| Federated Hermes Kaufmann Small Cap Fund | 4.06M | 4.14% |
| Vanguard Total Stock Market Index Fund | 2.65M | 2.70% |
| Fidelity Select Biotechnology Portfolio | 1.75M | 1.79% |
| Vanguard Extended Market Index Fund | 1.05M | 1.08% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders bought $49.63K (1 trade) of ATYR on the open market, with no sales.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Yaras Brandon | Award | 410.00K | — |
| SCHIMMEL PAUL | Buy | 100.00K | $49.63K |
| Lucas Svetlana | Award | 50.00K | — |
| Gross Jane A | Award | 50.00K | — |
| BENEVICH ERIC | Award | 50.00K | — |
| Zaknoen Sara | Award | 50.00K | — |
| Coughlin Timothy | Award | 50.00K | — |
| SCHIMMEL PAUL | Award | 50.00K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 12.89M
- Days to cover
- 1.00
- % of shares outstanding
- 13.15%
- Average daily volume
- 13.42M
- Change since last report
- +20.9%
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