Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
472 institutional managers reported holding JHG for the quarter ended Mar 31, 2026. Together they hold about 93% of shares outstanding; the top 10 hold 57%. 93 opened new positions; 80 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Trian Fund Management (focused) | 31.87M | 21.13% | $1.64B | unchanged | 2021 Q4 |
| BlackRock | 14.76M | 9.79% | $758.7M | trimmed -15% | 2017 Q2 |
| Vanguard Group | 12.34M | 8.18% | $634.2M | added +1.2% | 2017 Q2 |
| AQR Capital | 4.78M | 3.17% | $245.7M | added +1% | 2018 Q1 |
| State Street | 4.38M | 2.91% | $225.3M | trimmed -0.6% | 2017 Q2 |
| Dimensional Fund Advisors | 4.27M | 2.83% | $219.3M | trimmed -35.4% | 2017 Q2 |
| HBK Investments L P | 4.23M | 2.81% | $217.4M | opened | 2026 Q1 |
| Citadel Advisors | 3.77M | 2.50% | $193.9M | added +2270.7% | 2017 Q2 |
| Allianz Asset Management GmbH | 3.20M | 2.12% | $164.4M | added +42.8% | 2018 Q1 |
| Geode Capital | 2.65M | 1.75% | $136.0M | added +11.5% | 2017 Q2 |
| Goldman Sachs | 2.40M | 1.59% | $123.2M | added +17.1% | 2017 Q2 |
| Millennium Management | 2.34M | 1.55% | $120.1M | added +170.3% | 2017 Q3 |
| Qube Research & Technologies LTD | 2.27M | 1.51% | $116.7M | added +20% | 2019 Q4 |
| Neuberger Berman Group LLC | 2.23M | 1.48% | $114.5M | added +7120.9% | 2024 Q1 |
| TIG Advisors, LLC | 1.91M | 1.26% | $98.0M | opened | 2026 Q1 |
| Northern Trust | 1.90M | 1.26% | $97.7M | trimmed -5% | 2017 Q2 |
| Voloridge Investment Management | 1.80M | 1.19% | $92.3M | added +191% | 2025 Q1 |
| Charles Schwab Investment Management | 1.79M | 1.19% | $92.2M | trimmed -66.4% | 2017 Q2 |
| Morgan Stanley | 1.62M | 1.07% | $83.0M | added +3.4% | 2017 Q2 |
| Quantinno Capital Management LP | 1.47M | 0.98% | $75.8M | added +43.9% | 2018 Q4 |
| Capital Group (American Funds) | 1.20M | 0.80% | $61.7M | unchanged | 2017 Q2 |
| Healthcare OF Ontario Pension Plan Trust Fund | 1.11M | 0.73% | $56.8M | added +274.9% | 2025 Q4 |
| UBS | 991.4k | 0.66% | $50.9M | trimmed -37.1% | 2017 Q2 |
| Water Island Capital LLC | 922.3k | 0.61% | $47.4M | added +42.4% | 2025 Q4 |
| Man Group | 883.6k | 0.59% | $45.4M | added +16797.2% | 2018 Q1 |
| BNY Mellon | 873.9k | 0.58% | $44.9M | trimmed -2% | 2017 Q2 |
| LMR Partners LLP | 873.3k | 0.58% | $44.9M | opened | 2026 Q1 |
| Franklin Resources | 830.5k | 0.55% | $42.7M | added +268.7% | 2017 Q2 |
| Bank OF America CORP /DE/ | 713.9k | 0.47% | $36.7M | added +91.3% | 2017 Q2 |
| Glazer Capital, LLC | 682.3k | 0.45% | $35.1M | added +51.9% | 2025 Q4 |
| Arrowstreet Capital | 643.5k | 0.43% | $33.1M | trimmed -2.3% | 2023 Q3 |
| AllianceBernstein | 616.3k | 0.41% | $31.7M | trimmed -4.6% | 2017 Q2 |
| Alpine Associates Management INC. | 590.6k | 0.39% | $30.3M | added +127.1% | 2025 Q4 |
| Citigroup INC | 575.0k | 0.38% | $29.6M | added +95.5% | 2017 Q2 |
| Sculptor Capital | 571.3k | 0.38% | $29.4M | opened | 2026 Q1 |
| Balyasny Asset Management | 546.1k | 0.36% | $28.1M | trimmed -59.5% | 2024 Q2 |
| HRT Financial LP | 533.4k | 0.35% | $27.4M | added +379.2% | 2025 Q2 |
| Governors Lane LP | 532.5k | 0.35% | $27.4M | added +326% | 2025 Q4 |
| Susquehanna International Group | 445.4k | 0.29% | $22.9M | added +129.1% | 2017 Q3 |
| Picton Mahoney Asset Management | 425.0k | 0.28% | $21.8M | added +142.8% | 2024 Q3 |
| IEQ Capital, LLC | 418.7k | 0.28% | $21.5M | trimmed -2.8% | 2024 Q3 |
| Woodline Partners LP | 417.5k | 0.28% | $21.5M | added +81.5% | 2025 Q4 |
| Gamco Investors, INC. et al | 398.2k | 0.26% | $20.5M | trimmed -8.7% | 2017 Q2 |
| GAMCO (Gabelli) | 388.6k | 0.26% | $20.0M | added +29.1% | 2017 Q2 |
| Creative Planning | 364.3k | 0.24% | $18.7M | added +69.9% | 2022 Q4 |
| Corient Private Wealth LLC | 363.8k | 0.24% | $18.7M | added +187.1% | 2024 Q1 |
| Tudor Investment | 358.0k | 0.24% | $18.4M | added +2813.2% | 2025 Q1 |
| Hudson Bay Capital | 354.8k | 0.23% | $18.2M | trimmed -78.9% | 2025 Q4 |
| Invesco | 348.6k | 0.23% | $17.9M | trimmed -59.3% | 2017 Q2 |
| Focus Partners Wealth | 340.2k | 0.23% | $17.5M | added +16.9% | 2024 Q3 |
Largest 50 of 472 shown; the full ranked, searchable register is at boothcheck.com/holders/JHG. 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.