Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
507 institutional managers reported holding MOH for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 57%. 120 opened new positions; 151 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 6.37M | 12.49% | $848.7M | added +63.6% | ≤2013 |
| Vanguard Group | 5.51M | 10.81% | $734.6M | trimmed -9.5% | ≤2013 |
| FMR (Fidelity) | 3.20M | 6.28% | $427.1M | added +7.7% | 2017 Q2 |
| Capital Group (American Funds) | 3.20M | 6.27% | $426.3M | trimmed -8.7% | ≤2013 |
| AQR Capital | 2.86M | 5.61% | $381.6M | added +597.7% | 2014 Q3 |
| Victory Capital Management INC | 2.07M | 4.06% | $275.9M | added +46.8% | 2014 Q4 |
| State Street | 1.73M | 3.39% | $230.6M | trimmed -13.8% | ≤2013 |
| Dimensional Fund Advisors | 1.39M | 2.73% | $185.9M | added +23.7% | ≤2013 |
| Two Sigma | 1.35M | 2.65% | $180.0M | added +64.1% | 2022 Q2 |
| Wellington Management | 1.13M | 2.22% | $150.8M | added +2% | 2016 Q4 |
| Capital Research Global Investors | 1.09M | 2.13% | $145.0M | added +36.7% | 2022 Q4 |
| Morgan Stanley | 1.01M | 1.97% | $134.1M | added +15% | ≤2013 |
| T. Rowe Price | 981.7k | 1.93% | $130.8M | trimmed -1.3% | 2014 Q4 |
| Harris Associates (Oakmark) | 978.1k | 1.92% | $130.3M | trimmed -58.3% | 2025 Q1 |
| Geode Capital | 921.0k | 1.81% | $122.7M | trimmed -34.2% | ≤2013 |
| Jane Street | 832.5k | 1.63% | $110.9M | added +591% | 2018 Q2 |
| Goldman Sachs | 726.9k | 1.43% | $96.9M | added +83.8% | ≤2013 |
| UBS | 694.5k | 1.36% | $92.5M | added +62.6% | ≤2013 |
| Maverick Capital | 645.8k | 1.27% | $86.1M | opened | 2026 Q1 |
| Madison Avenue Partners, LP (focused) | 633.9k | 1.24% | $84.5M | unchanged | 2025 Q4 |
| Baupost Group (focused) | 633.6k | 1.24% | $84.4M | added +1.4% | 2025 Q4 |
| Long Focus Capital Management, LLC | 615.0k | 1.21% | $82.0M | added +35.2% | 2025 Q3 |
| T. Rowe Price Investment Management, INC. | 556.7k | 1.09% | $74.2M | trimmed -56.9% | 2022 Q3 |
| Manning & Napier Advisors LLC | 545.4k | 1.07% | $72.7M | opened | 2026 Q1 |
| Charles Schwab Investment Management | 539.3k | 1.06% | $71.9M | trimmed -1.6% | ≤2013 |
| Invesco | 507.6k | 0.99% | $67.6M | trimmed -70% | ≤2013 |
| BNP Paribas Financial Markets | 487.0k | 0.95% | $64.9M | added +5% | ≤2013 |
| Voloridge Investment Management | 435.9k | 0.85% | $58.1M | added +3209.3% | 2022 Q4 |
| Thompson Siegel & Walmsley LLC | 400.7k | 0.79% | $53.4M | added +219.1% | 2025 Q4 |
| Northern Trust | 383.1k | 0.75% | $51.0M | trimmed -16.8% | ≤2013 |
| Bank OF America CORP /DE/ | 374.7k | 0.73% | $49.9M | trimmed -38.8% | ≤2013 |
| Jacobs Levy Equity Management, INC | 350.9k | 0.69% | $46.8M | trimmed -11.8% | ≤2013 |
| Citigroup INC | 336.7k | 0.66% | $44.9M | added +21.4% | ≤2013 |
| Fiera Capital CORP | 329.8k | 0.65% | $43.9M | added +4.8% | 2025 Q2 |
| BNY Mellon | 329.3k | 0.65% | $43.9M | added +25.2% | ≤2013 |
| Point72 | 317.6k | 0.62% | $42.3M | added +275% | 2024 Q3 |
| Redwood Capital Management, LLC (focused) | 310.0k | 0.61% | $41.3M | added +181.8% | 2025 Q3 |
| Kopernik Global Investors, LLC (focused) | 291.9k | 0.57% | $38.9M | added +132.6% | 2025 Q4 |
| Principal Financial Group INC | 251.6k | 0.49% | $33.5M | added +333.4% | ≤2013 |
| Susquehanna International Group | 247.7k | 0.49% | $33.0M | added +16.7% | ≤2013 |
| Investment Management Associates INC /ADV (focused) | 233.2k | 0.46% | $31.1M | added +3.4% | 2025 Q3 |
| Barclays PLC | 227.4k | 0.45% | $30.3M | unchanged | ≤2013 |
| State OF Michigan Retirement System | 224.0k | 0.44% | $29.9M | added +1568% | 2015 Q2 |
| Citadel Advisors | 222.6k | 0.44% | $29.7M | added +10.6% | ≤2013 |
| HRT Financial LP | 211.2k | 0.41% | $28.1M | added +284.4% | 2025 Q4 |
| Walleye Capital LLC | 209.0k | 0.41% | $27.8M | added +139.3% | 2023 Q1 |
| Summit Street Capital Management, LLC (focused) | 192.6k | 0.38% | $25.7M | added +125.2% | 2014 Q4 |
| Amundi | 184.8k | 0.36% | $24.6M | added +5.6% | 2017 Q4 |
| Public Sector Pension Investment Board | 184.2k | 0.36% | $24.6M | added +1311.4% | 2022 Q1 |
| Maple Rock Capital Partners INC. (focused) | 169.7k | 0.33% | $22.6M | trimmed -25% | 2025 Q3 |
Largest 50 of 507 shown; the full ranked, searchable register is at boothcheck.com/holders/MOH. 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.