Who owns ASTX?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of ASTX from SEC Form 13F filings across 22 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, 22 institutions disclosed 854,205 shares of ASTX worth $22.8M; the largest disclosed holder is HighTower Advisors, LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
22
13F holders
$22.8M
value, 2026 filers
854,205
shares disclosed
12
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 ASTX's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | HighTower Advisors, LLC | 219,775 | $6.1M | 0.0% | — | +70.7% |
| 2 | Optiver Holding B.V. | 142,783 | $3.9M | 0.0% | — | +742.1% |
| 3 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 74,327 | $2.1M | 0.0% | — | +9.4% |
| 4 | IMC-Chicago, LLC | 67,340 | $1.9M | 0.0% | — | +249.4% |
| 5 | GOLDMAN SACHS GROUP INCNEW | 59,407 | $1.6M | 0.0% | — | new |
| 6 | UBS Group AG | 36,326 | $1.0M | 0.0% | — | 0.0% |
| 7 | Garden State Investment Advisory Services LLCNEW | 33,483 | $924,298 | 0.2% | — | new |
| 8 | JANE STREET GROUP, LLCNEW | 28,274 | $780,504 | 0.0% | — | new |
| 9 | GRIFFIN ASSET MANAGEMENT, INC.NEW | 27,860 | $769,075 | 0.1% | — | new |
| 10 | T3 Companies, LLC | 25,000 | $690,125 | 0.7% | — | +150.0% |
| 11 | CITADEL ADVISORS LLC | 23,983 | $662,051 | 0.0% | — | -64.3% |
| 12 | RENAISSANCE TECHNOLOGIES LLCNEW | 18,800 | $518,974 | 0.0% | — | new |
| 13 | Jump Financial, LLCNEW | 17,210 | $475,082 | 0.0% | — | new |
| 14 | Scientech Research LLCNEW | 16,018 | $442,177 | 0.4% | — | new |
| 15 | HRT FINANCIAL LP | 15,675 | $432 | 0.0% | — | -7.3% |
| 16 | FLOW TRADERS U.S. LLCNEW | 14,308 | $395 | 0.0% | — | new |
| 17 | Belvedere Trading LLC | 11,040 | $304,759 | 0.0% | — | -58.0% |
| 18 | SIMPLEX TRADING, LLC | 10,512 | $290,183 | 0.0% | — | +43.1% |
| 19 | GROUP ONE TRADING LLCNEW | 7,971 | $220,039 | 0.0% | — | new |
| 20 | Tower Research Capital LLC (TRC)NEW | 3,872 | $106,887 | 0.0% | — | new |
| 21 | Hurley Capital, LLCNEW | 181 | $4,997 | 0.0% | — | new |
| 22 | Farther Finance Advisors, LLCNEW | 60 | $1,656 | 0.0% | — | 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.