Who owns aTYR PHARMA INC?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of ATYR from SEC Form 13F filings across 91 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 91 institutions disclosed 39.0M shares of aTYR PHARMA INC worth $21.2M — about 39.8% of shares outstanding; the largest disclosed holder is FEDERATED HERMES, INC.. Source: SEC Form 13F filings, parsed by EvidInvest.
91
13F holders
$21.2M
value, 2026 filers
39.8%
of shares outstanding (39.0M sh)
18
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of ATYR's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | FEDERATED HERMES, INC. | 8.5M | $5.1M | 0.0% | 8.7% | -19.0% |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 3.8M | $2.3M | 0.0% | 3.9% | -0.1% |
| 3 | GSA CAPITAL PARTNERS LLP | 3.5M | $2,062 | 0.1% | 3.5% | +105.1% |
| 4 | AQR CAPITAL MANAGEMENT LLC | 2.6M | $1.6M | 0.0% | 2.7% | +426.3% |
| 5 | FMR LLC | 2.5M | $1.5M | 0.0% | 2.5% | -83.2% |
| 6 | BlackRock, Inc. | 1.8M | $1.1M | 0.0% | 1.9% | -71.6% |
| 7 | Kalehua Capital Management LLCNEW | 1.8M | $1.1M | 0.8% | 1.8% | new |
| 8 | JANE STREET GROUP, LLC | 1.7M | $1.0M | 0.0% | 1.8% | +3448.9% |
| 9 | UBS Group AG | 1.5M | $914,097 | 0.0% | 1.6% | -60.4% |
| 10 | MORGAN STANLEY | 1.3M | $801,882 | 0.0% | 1.4% | +9.6% |
| 11 | TWO SIGMA INVESTMENTS, LP | 1.2M | $743,104 | 0.0% | 1.3% | +8.8% |
| 12 | CITADEL ADVISORS LLC | 1.2M | $741,265 | 0.0% | 1.3% | +2521.9% |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | 1.2M | $702,734 | 0.0% | 1.2% | -50.7% |
| 14 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 747,039 | $445,833 | 0.0% | 0.8% | -13.8% |
| 15 | MILLENNIUM MANAGEMENT LLC | 656,051 | $391,531 | 0.0% | 0.7% | -60.0% |
| 16 | GOLDMAN SACHS GROUP INC | 641,208 | $382,672 | 0.0% | 0.7% | +126.4% |
| 17 | VANGUARD FIDUCIARY TRUST CO | 576,125 | $343,947 | 0.0% | 0.6% | -11.6% |
| 18 | STATE STREET CORP | 494,951 | $295,387 | 0.0% | 0.5% | -71.8% |
| 19 | MARSHALL WACE, LLP | 368,120 | $220,872 | 0.0% | 0.4% | +166.5% |
| 20 | XTX Topco Ltd | 226,678 | $135,281 | 0.0% | 0.2% | +103.4% |
| 21 | NORTHERN TRUST CORP | 220,141 | $131,380 | 0.0% | 0.2% | -69.0% |
| 22 | BANK OF AMERICA CORP /DE/ | 207,468 | $123,650 | 0.0% | 0.2% | -31.7% |
| 23 | Curated Wealth Partners LLCNEW | 190,000 | $185,390 | 0.0% | 0.2% | new |
| 24 | RENAISSANCE TECHNOLOGIES LLC | 165,222 | $98,604 | 0.0% | 0.2% | +307.7% |
| 25 | JPMORGAN CHASE & CONEW | 150,666 | $85,337 | 0.0% | 0.2% | new |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.