Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
281 institutional managers reported holding ALHC for the quarter ended Mar 31, 2026. Together they hold about 95% of shares outstanding; the top 10 hold 51%. 69 opened new positions; 49 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 19.13M | 8.98% | $337.3M | added +23.4% | 2021 Q1 |
| Wellington Management | 17.10M | 8.02% | $301.5M | added +21.5% | 2023 Q2 |
| FMR (Fidelity) | 15.89M | 7.46% | $280.2M | added +8.4% | 2021 Q1 |
| BlackRock | 14.08M | 6.60% | $248.1M | added +2.7% | 2021 Q1 |
| T. Rowe Price Investment Management, INC. | 13.15M | 6.17% | $231.8M | added +678% | 2022 Q3 |
| Invesco | 7.00M | 3.28% | $123.4M | added +12.9% | 2021 Q2 |
| Hood River Capital Management LLC | 6.05M | 2.84% | $106.7M | trimmed -1.9% | 2022 Q4 |
| T. Rowe Price | 5.74M | 2.69% | $101.2M | added +5% | 2021 Q1 |
| Citadel Advisors | 5.36M | 2.52% | $94.5M | added +23.5% | 2021 Q2 |
| William Blair Investment Management, LLC | 5.21M | 2.45% | $91.9M | added +126.2% | 2023 Q1 |
| Geode Capital | 4.41M | 2.07% | $77.8M | added +14.8% | 2021 Q1 |
| State Street | 4.29M | 2.02% | $75.7M | added +17% | 2021 Q2 |
| Millennium Management | 3.84M | 1.80% | $67.7M | added +49.5% | 2022 Q3 |
| Capital Research Global Investors | 3.59M | 1.69% | $63.4M | opened | 2026 Q1 |
| BNY Mellon | 3.31M | 1.55% | $58.4M | added +232.5% | 2021 Q2 |
| Bank OF America CORP /DE/ | 3.22M | 1.51% | $56.7M | added +156.5% | 2021 Q1 |
| Broad Bay Capital Management, LP (focused) | 2.92M | 1.37% | $51.5M | added +16.3% | 2024 Q4 |
| Renaissance Technologies | 2.90M | 1.36% | $51.2M | added +8.8% | 2021 Q4 |
| Voya Investment Management LLC | 2.80M | 1.31% | $49.3M | trimmed -23.9% | 2021 Q2 |
| Capital Group (American Funds) | 2.67M | 1.25% | $47.0M | added +19.1% | 2025 Q4 |
| Integral Health Asset Management, LLC | 2.58M | 1.21% | $45.4M | added +17% | 2024 Q4 |
| Danica Pension, Livsforsikringsaktieselskab | 2.50M | 1.18% | $44.1M | added +25.2% | 2025 Q4 |
| Allspring Global Investments Holdings, LLC | 2.46M | 1.15% | $43.3M | added +276.7% | 2023 Q1 |
| Point72 | 2.44M | 1.15% | $43.0M | added +19.5% | 2024 Q4 |
| Next Century Growth Investors LLC | 2.26M | 1.06% | $39.9M | trimmed -2% | 2024 Q4 |
| Loomis Sayles & CO L P | 2.11M | 0.99% | $37.1M | trimmed -5.8% | 2025 Q4 |
| Ameriprise Financial INC | 2.10M | 0.99% | $37.0M | added +9% | 2024 Q4 |
| Gilder Gagnon Howe & CO LLC | 1.83M | 0.86% | $32.3M | trimmed -1.3% | 2025 Q2 |
| Northern Trust | 1.58M | 0.74% | $27.9M | added +14.5% | 2021 Q2 |
| Nuveen | 1.58M | 0.74% | $27.9M | trimmed -26% | 2021 Q2 |
| Morgan Stanley | 1.53M | 0.72% | $26.9M | trimmed -35.4% | 2021 Q1 |
| Qube Research & Technologies LTD | 1.52M | 0.71% | $26.8M | unchanged | 2024 Q4 |
| Charles Schwab Investment Management | 1.40M | 0.66% | $24.7M | added +9.8% | 2021 Q2 |
| Freestone Grove Partners LP | 1.34M | 0.63% | $23.6M | added +115.7% | 2024 Q4 |
| Rhenman & Partners Asset Management AB | 1.05M | 0.49% | $18.6M | added +4.4% | 2022 Q3 |
| Adage Capital Partners GP, L.l.c. | 1.05M | 0.49% | $18.5M | added +673.5% | 2024 Q1 |
| Goldman Sachs | 1.01M | 0.47% | $17.8M | trimmed -12.2% | 2021 Q1 |
| Oberweis Asset Management INC/ | 966.6k | 0.45% | $17.0M | added +29.3% | 2025 Q4 |
| Jupiter Asset Management LTD | 877.8k | 0.41% | $15.5M | added +14.7% | 2025 Q2 |
| AQR Capital | 817.3k | 0.38% | $14.4M | trimmed -7.7% | 2024 Q2 |
| Orbimed Advisors LLC | 791.0k | 0.37% | $13.9M | opened | 2026 Q1 |
| Granahan Investment Management, LLC | 780.5k | 0.37% | $13.8M | added +4.1% | 2025 Q2 |
| Marsico Capital Management LLC | 779.8k | 0.37% | $13.7M | added +9.3% | 2025 Q3 |
| Arrowstreet Capital | 760.0k | 0.36% | $13.4M | trimmed -55.4% | 2024 Q3 |
| SEI Investments CO | 739.1k | 0.35% | $13.0M | added +66.7% | 2024 Q4 |
| Acadian Asset Management | 692.6k | 0.33% | $12.2M | trimmed -33.1% | 2024 Q3 |
| First Trust Advisors LP | 626.2k | 0.29% | $11.0M | added +0.8% | 2024 Q2 |
| Federated Hermes, INC. | 604.8k | 0.28% | $10.7M | added +5.8% | 2024 Q1 |
| UBS | 600.0k | 0.28% | $10.6M | trimmed -26.8% | 2021 Q1 |
| Principal Financial Group INC | 560.5k | 0.26% | $9.9M | added +40.6% | 2024 Q1 |
Largest 50 of 281 shown; the full ranked, searchable register is at boothcheck.com/holders/ALHC. 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.