Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
163 institutional managers reported holding ASTH for the quarter ended Mar 31, 2026. Together they hold about 61% of shares outstanding; the top 10 hold 40%. 21 opened new positions; 32 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 6.16M | 12.56% | $151.1M | unchanged | 2018 Q2 |
| Vanguard Group | 4.34M | 8.85% | $106.5M | added +2.4% | 2018 Q2 |
| 325 Capital LLC (focused) | 1.84M | 3.75% | $45.1M | unchanged | 2022 Q3 |
| State Street | 1.65M | 3.37% | $40.5M | trimmed -1.5% | 2018 Q2 |
| Dimensional Fund Advisors | 1.37M | 2.79% | $33.5M | added +12.5% | 2018 Q3 |
| Wellington Management | 1.34M | 2.73% | $32.9M | added +81.6% | 2025 Q3 |
| Geode Capital | 1.04M | 2.12% | $25.5M | added +1% | 2018 Q2 |
| 683 Capital Management, LLC | 700.0k | 1.43% | $17.2M | opened | 2026 Q1 |
| Charles Schwab Investment Management | 644.2k | 1.31% | $15.8M | added +17.3% | 2018 Q2 |
| Bank OF America CORP /DE/ | 574.7k | 1.17% | $14.1M | added +13.3% | 2017 Q4 |
| SteelPeak Wealth, LLC | 559.9k | 1.14% | $13.7M | trimmed -3.4% | 2021 Q4 |
| Ameriprise Financial INC | 551.6k | 1.12% | $13.5M | added +25.9% | 2021 Q2 |
| Diamond Hill Capital Management INC | 544.0k | 1.11% | $13.3M | added +25.7% | 2024 Q2 |
| Hotchkis & Wiley Capital Management LLC | 481.5k | 0.98% | $11.8M | added +15.5% | 2025 Q1 |
| Northern Trust | 438.2k | 0.89% | $10.7M | added +8.9% | 2018 Q2 |
| FMR (Fidelity) | 416.1k | 0.85% | $10.2M | trimmed -61.1% | 2022 Q1 |
| Royce & Associates | 397.0k | 0.81% | $9.7M | added +14% | 2024 Q1 |
| UBS | 396.7k | 0.81% | $9.7M | added +52.1% | 2017 Q4 |
| Jacobs Levy Equity Management, INC | 386.4k | 0.79% | $9.5M | trimmed -18.4% | 2024 Q3 |
| BNP Paribas Financial Markets | 361.0k | 0.74% | $8.9M | added +8.8% | 2018 Q2 |
| Invesco | 351.1k | 0.72% | $8.6M | trimmed -1.2% | 2021 Q1 |
| Morgan Stanley | 338.8k | 0.69% | $8.3M | trimmed -21.9% | 2017 Q4 |
| LPL Financial LLC | 309.1k | 0.63% | $7.6M | unchanged | 2025 Q3 |
| Goldman Sachs | 295.3k | 0.60% | $7.2M | trimmed -6.2% | 2019 Q3 |
| Principal Financial Group INC | 265.9k | 0.54% | $6.5M | added +15.7% | 2021 Q2 |
| BNY Mellon | 221.8k | 0.45% | $5.4M | trimmed -3.4% | 2018 Q2 |
| Earnest Partners LLC | 220.0k | 0.45% | $5.4M | added +12.5% | 2025 Q4 |
| Public Sector Pension Investment Board | 154.3k | 0.32% | $3.8M | added +3.3% | 2021 Q2 |
| 1492 Capital Management LLC | 153.7k | 0.31% | $3.8M | trimmed -8.4% | 2025 Q4 |
| Man Group | 153.4k | 0.31% | $3.8M | opened | 2026 Q1 |
| Insight Wealth Strategies, LLC | 143.3k | 0.29% | $3.5M | added +1.2% | 2025 Q4 |
| Envestnet Asset Management INC | 138.4k | 0.28% | $3.4M | added +9.6% | 2022 Q2 |
| SEI Investments CO | 134.9k | 0.28% | $3.3M | added +94.4% | 2024 Q2 |
| Renaissance Technologies | 104.5k | 0.21% | $2.6M | added +12.2% | 2022 Q4 |
| Wells Fargo & COMPANY/MN | 103.0k | 0.21% | $2.5M | trimmed -11.4% | 2018 Q2 |
| Rhumbline Advisers | 100.6k | 0.20% | $2.5M | added +4.9% | 2019 Q3 |
| Legal & General Group PLC | 99.1k | 0.20% | $2.4M | trimmed -9.1% | 2018 Q2 |
| Swiss National Bank | 88.4k | 0.18% | $2.2M | unchanged | 2018 Q4 |
| Nuveen | 86.1k | 0.18% | $2.1M | added +0.6% | 2019 Q2 |
| State OF Wisconsin Investment Board | 83.0k | 0.17% | $2.0M | added +24.3% | 2021 Q2 |
| Westmount Partners, LLC | 77.8k | 0.16% | $1.9M | trimmed -2.1% | 2022 Q4 |
| Squarepoint Ops LLC | 70.2k | 0.14% | $1.7M | added +152.3% | 2024 Q4 |
| Emerald Investment Advisers, LLC | 69.8k | 0.14% | $1.7M | opened | 2026 Q1 |
| Quantinno Capital Management LP | 64.5k | 0.13% | $1.6M | added +69.4% | 2025 Q4 |
| Hussman Strategic Advisors, INC. | 63.0k | 0.13% | $1.5M | unchanged | 2024 Q4 |
| AllianceBernstein | 60.3k | 0.12% | $1.5M | added +19.4% | 2018 Q4 |
| Linden Thomas Advisory Services, LLC | 58.7k | 0.12% | $1.4M | added +108.8% | 2023 Q2 |
| Balyasny Asset Management | 58.4k | 0.12% | $1.4M | trimmed -48.7% | 2024 Q2 |
| California State Teachers Retirement System | 51.4k | 0.10% | $1.3M | added +24.5% | 2018 Q2 |
| Victory Capital Management INC | 50.3k | 0.10% | $1.2M | opened | 2021 Q1 |
Largest 50 of 163 shown; the full ranked, searchable register is at boothcheck.com/holders/ASTH. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.