Who owns ASTL (ASTL)
Which tracked institutional funds hold ASTL, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ASTL company fundamentals →
Ownership as of the 2026-Q1 13F filings. 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
21 tracked funds added or opened ASTL while 19 trimmed or exited it between 2025-Q4 and 2026-Q1 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
ASTL’s largest tracked holder by dollar value, Maple Rock Capital Partners Inc., sizes it at 2.1% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 2.1pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in ASTL divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 98 tracked filers holding ASTL, 48 increased or opened the position and 57 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in ASTL between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 4
- Sourcerock Group LLC$5M
- HRT FINANCIAL LP$2M
- TWO SIGMA INVESTMENTS, LP$1M
- JPMORGAN CHASE & CO$914K
Full exits 6
- INVESCO SENIOR SECURED MANAGEMENT INC /ADV$18M
- GOLDENTREE ASSET MANAGEMENT LP$10M
- FMR LLC$9M
- Walleye Capital LLC$2M
- Orion Resource Partners LP$2M
- Prescott Group Capital Management, L.L.C.$948K
Largest adds
- Maple Rock Capital Partners Inc.$7M
- MMCAP International Inc. SPC$6M
- MORGAN STANLEY$2M
- LM Asset Management Inc.$1M
- DONALD SMITH & CO., INC.$867K
- ExodusPoint Capital Management, LP$840K
Largest trims
- BlackRock, Inc.$18M
- Verition Fund Management LLC$5M
- TD Asset Management Inc$3M
- UBS Group AG$3M
- Connor, Clark & Lunn Investment Management Ltd.$2M
- BANK OF AMERICA CORP /DE/$2M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| Maple Rock Capital Partners Inc. added | 15,930,818 | $66M | 15.6% | 2026-Q1 |
| MMCAP International Inc. SPC added | 12,845,622 | $53M | 12.6% | 2026-Q1 |
| DONALD SMITH & CO., INC. added | 6,028,929 | $25M | 5.9% | 2026-Q1 |
| BlackRock, Inc. trimmed | 4,115,453 | $17M | 4.0% | 2026-Q1 |
| LITTLEJOHN & CO LLC | 3,446,503 | $14M | 3.4% | 2026-Q1 |
| Scheer, Rowlett & Associates Investment Management Ltd. trimmed | 3,207,480 | $13M | 3.1% | 2026-Q1 |
| AEGIS FINANCIAL CORP | 1,786,122 | $7M | 1.7% | 2026-Q1 |
| LM Asset Management Inc. added | 1,765,000 | $7M | 1.7% | 2026-Q1 |
| Connor, Clark & Lunn Investment Management Ltd. trimmed | 1,725,758 | $7M | 1.7% | 2026-Q1 |
| CDC Financial, Inc. added | 1,613,749 | $7M | 1.6% | 2026-Q1 |
| MORGAN STANLEY added | 1,483,711 | $6M | 1.5% | 2026-Q1 |
| Sourcerock Group LLC new | 1,306,403 | $5M | 1.3% | 2026-Q1 |
| Solas Capital Management, LLC trimmed | 1,047,454 | $4M | 1.0% | 2026-Q1 |
| Bracebridge Capital, LLC | 924,931 | $4M | 0.9% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 895,566 | $4M | 0.9% | 2026-Q1 |
| Quadrature Capital Ltd trimmed | 878,540 | $4M | 0.9% | 2026-Q1 |
| JB CAPITAL PARTNERS LP | 872,277 | $4M | 0.9% | 2026-Q1 |
| TD Asset Management Inc trimmed | 841,904 | $3M | 0.8% | 2026-Q1 |
| Bain Capital Credit, LP | 825,777 | $3M | 0.8% | 2026-Q1 |
| TCW GROUP INC added | 768,178 | $3M | 0.8% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 766,411 | $3M | 0.7% | 2026-Q1 |
| Ewing Morris & Co. Investment Partners Ltd. added | 710,000 | $3M | 0.7% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 598,919 | $2M | 0.6% | 2026-Q1 |
| Russell Investments Group, Ltd. added | 571,566 | $2M | 0.6% | 2026-Q1 |
| HRT FINANCIAL LP new | 467,190 | $2M | 0.5% | 2026-Q1 |
| READYSTATE ASSET MANAGEMENT LP trimmed | 463,228 | $2M | 0.5% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 361,996 | $1M | 0.4% | 2026-Q1 |
| UBS Group AG trimmed | 306,957 | $1M | 0.3% | 2026-Q1 |
| BANK OF MONTREAL /CAN/ added | 272,613 | $1M | 0.3% | 2026-Q1 |
| D. E. Shaw & Co., Inc. trimmed | 270,544 | $1M | 0.3% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 269,900 | $1M | 0.3% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 267,743 | $1M | 0.3% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 252,457 | $1M | 0.2% | 2026-Q1 |
| CenterBook Partners LP trimmed | 233,509 | $964K | 0.2% | 2026-Q1 |
| ExodusPoint Capital Management, LP added | 229,563 | $948K | 0.2% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 230,817 | $914K | 0.2% | 2026-Q1 |
| XTX Topco Ltd added | 182,347 | $753K | 0.2% | 2026-Q1 |
| SIG North Trading, ULC added | 171,817 | $710K | 0.2% | 2026-Q1 |
| BARCLAYS PLC added | 171,556 | $709K | 0.2% | 2026-Q1 |
| Quantbot Technologies LP added | 157,928 | $652K | 0.2% | 2026-Q1 |
| SIMPLEX TRADING, LLC added | 154,905 | $640K | 0.2% | 2026-Q1 |
| ROYAL BANK OF CANADA added | 146,821 | $607K | 0.1% | 2026-Q1 |
| Quinn Opportunity Partners LLC | 142,336 | $588K | 0.1% | 2026-Q1 |
| Voleon Capital Management LP added | 130,919 | $541K | 0.1% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 117,276 | $484K | 0.1% | 2026-Q1 |
| Summit Financial, LLC | 110,333 | $456K | 0.1% | 2026-Q1 |
| Assenagon Asset Management S.A. added | 99,107 | $409K | 0.1% | 2026-Q1 |
| MACKENZIE FINANCIAL CORP added | 98,773 | $408K | 0.1% | 2026-Q1 |
| AYAL Capital Advisors Ltd trimmed | 95,000 | $392K | 0.1% | 2026-Q1 |
| ARISTEIA CAPITAL, L.L.C. trimmed | 91,423 | $378K | 0.1% | 2026-Q1 |
| Boston Partners added | 87,067 | $360K | 0.1% | 2026-Q1 |
| GROUP ONE TRADING LLC trimmed | 85,656 | $354K | 0.1% | 2026-Q1 |
| Point72 Asset Management, L.P. trimmed | 73,916 | $307K | 0.1% | 2026-Q1 |
| INVESCO SENIOR SECURED MANAGEMENT INC /ADV | 3,233,117 | $18M | 4.3% | 2025-Q4 stale |
| INTACT INVESTMENT MANAGEMENT INC. added | 2,007,006 | $14M | 3.3% | 2025-Q2 stale |
| GOLDENTREE ASSET MANAGEMENT LP | 2,493,548 | $10M | 2.4% | 2025-Q4 stale |
| TOWLE & CO trimmed | 1,463,161 | $10M | 2.4% | 2025-Q2 stale |
| FMR LLC trimmed | 2,208,646 | $9M | 2.1% | 2025-Q4 stale |
| J. Goldman & Co LP added | 2,263,011 | $8M | 1.9% | 2025-Q3 stale |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 1,134,086 | $8M | 1.9% | 2025-Q2 stale |
| CONTRARIAN CAPITAL MANAGEMENT, L.L.C. trimmed | 2,037,686 | $7M | 1.7% | 2025-Q3 stale |
| Woodline Partners LP trimmed | 1,240,894 | $7M | 1.6% | 2025-Q1 stale |
| Thomist Capital Management, LP trimmed | 737,877 | $4M | 1.0% | 2025-Q1 stale |
| Empyrean Capital Partners, LP trimmed | 452,148 | $3M | 0.7% | 2025-Q2 stale |
| Amitell Capital Pte Ltd trimmed | 864,585 | $3M | 0.7% | 2025-Q3 stale |
| Polar Asset Management Partners Inc. added | 363,216 | $3M | 0.6% | 2025-Q2 stale |
| Walleye Capital LLC added | 537,234 | $2M | 0.5% | 2025-Q4 stale |
| HEARTLAND ADVISORS INC added | 600,000 | $2M | 0.5% | 2025-Q3 stale |
| Cubist Systematic Strategies, LLC added | 464,682 | $2M | 0.4% | 2025-Q3 stale |
| Orion Resource Partners LP added | 381,728 | $2M | 0.4% | 2025-Q4 stale |
| SummitTX Capital, L.P. new | 214,000 | $1M | 0.3% | 2025-Q2 stale |
| Wolf Hill Capital Management, LP | 213,712 | $1M | 0.3% | 2025-Q2 stale |
| ADAGE CAPITAL PARTNERS GP, L.L.C. trimmed | 157,991 | $1M | 0.3% | 2025-Q2 stale |
| NewGen Asset Management Ltd trimmed | 246,097 | $1M | 0.2% | 2025-Q3 stale |
| GENERAL AMERICAN INVESTORS CO INC trimmed | 280,136 | $996K | 0.2% | 2025-Q3 stale |
| Prescott Group Capital Management, L.L.C. added | 231,219 | $948K | 0.2% | 2025-Q4 stale |
| Mutual Advisors, LLC | 146,802 | $915K | 0.2% | 2025-Q2 stale |
| IMC-Chicago, LLC added | 115,231 | $794K | 0.2% | 2025-Q2 stale |
| HITE Hedge Asset Management LLC | 214,556 | $763K | 0.2% | 2025-Q3 stale |
| MOORE CAPITAL MANAGEMENT, LP | 212,331 | $755K | 0.2% | 2025-Q3 stale |
| CIBC Asset Management Inc added | 120,021 | $652K | 0.2% | 2025-Q1 stale |
| ROBOTTI ROBERT | 90,000 | $620K | 0.1% | 2025-Q2 stale |
| Swiss National Bank trimmed | 164,107 | $583K | 0.1% | 2025-Q3 stale |
| WOLVERINE TRADING, LLC added | 99,460 | $568K | 0.1% | 2025-Q1 stale |
| VAN ECK ASSOCIATES CORP added | 158,682 | $564K | 0.1% | 2025-Q3 stale |
| Trexquant Investment LP added | 139,162 | $495K | 0.1% | 2025-Q3 stale |
| UBS AM, A DISTINCT BUSINESS UNIT OF UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 65,689 | $453K | 0.1% | 2025-Q2 stale |
| OnyxPoint Global Management LP added | 72,289 | $392K | 0.1% | 2025-Q1 stale |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 71,793 | $392K | 0.1% | 2025-Q1 stale |
| Marex Group plc | 72,167 | $391K | 0.1% | 2025-Q1 stale |
| SUSQUEHANNA ADVISORS GROUP, INC. new | 56,400 | $389K | 0.1% | 2025-Q2 stale |
| Man Group plc trimmed | 64,995 | $352K | 0.1% | 2025-Q1 stale |
| Senvest Management, LLC trimmed | 85,789 | $352K | 0.1% | 2025-Q4 stale |
| NOMURA HOLDINGS INC added | 84,567 | $347K | 0.1% | 2025-Q4 stale |
| Eisler Capital Management Ltd. new | 50,000 | $344K | 0.1% | 2025-Q2 stale |
| Lighthouse Investment Partners, LLC added | 75,708 | $310K | 0.1% | 2025-Q4 stale |
| OCCUDO QUANTITATIVE STRATEGIES LP trimmed | 54,269 | $310K | 0.1% | 2025-Q1 stale |
| TWO SIGMA ADVISERS, LP added | 73,600 | $302K | 0.1% | 2025-Q4 stale |
| WOLVERINE ASSET MANAGEMENT LLC added | 72,143 | $296K | 0.1% | 2025-Q4 stale |
| BRITISH COLUMBIA INVESTMENT MANAGEMENT Corp added | 53,789 | $292K | 0.1% | 2025-Q1 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.