Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in JHG held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | TRIAN FUND MANAGEMENT, L.P. | 31.9M | $1.64B | 0.0% | 20.683% | 42.41% |
| 2 | BlackRock, Inc. | 14.8M | $758.4M | -15.0% | 9.582% | 0.01% |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | 5.8M | $296.5M | — | 3.746% | 0.02% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 5.6M | $285.4M | — | 3.605% | 0.01% |
| 5 | STATE STREET CORP | 4.4M | $225.2M | -0.6% | 2.845% | 0.01% |
| 6 | DIMENSIONAL FUND ADVISORS LP | 4.3M | $219.3M | -35.4% | 2.770% | 0.05% |
| 7 | HBK INVESTMENTS L P | 4.2M | $217.3M | — | 2.746% | 2.83% |
| 8 | CITADEL ADVISORS LLC | 3.8M | $195.4M | +2290.3% | 2.469% | 0.09% |
| 9 | AQR CAPITAL MANAGEMENT LLC | 3.3M | $171.6M | -25.2% | 2.169% | 0.08% |
| 10 | Allianz Asset Management GmbH | 3.2M | $164.4M | +42.8% | 2.077% | 0.18% |
| 11 | GEODE CAPITAL MANAGEMENT, LLC | 2.6M | $136.0M | +11.6% | 1.717% | 0.01% |
| 12 | GOLDMAN SACHS GROUP INC | 2.4M | $123.1M | +17.1% | 1.556% | 0.01% |
| 13 | MILLENNIUM MANAGEMENT LLC | 2.3M | $120.0M | +170.3% | 1.517% | 0.08% |
| 14 | Qube Research & Technologies Ltd | 2.3M | $116.7M | +20.0% | 1.474% | 0.14% |
| 15 | Neuberger Berman Group LLC | 2.2M | $114.4M | +7120.9% | 1.446% | 0.09% |
| 16 | TIG Advisors, LLC | 1.9M | $97.9M | — | 1.237% | 5.03% |
| 17 | NORTHERN TRUST CORP | 1.9M | $97.6M | -5.0% | 1.234% | 0.01% |
| 18 | VOLORIDGE INVESTMENT MANAGEMENT, LLC | 1.8M | $92.3M | +191.0% | 1.166% | 0.37% |
| 19 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.8M | $92.1M | -66.4% | 1.164% | 0.01% |
| 20 | MORGAN STANLEY | 1.6M | $83.0M | +3.4% | 1.049% | 0.01% |
| 21 | Quantinno Capital Management LP | 1.5M | $75.7M | +43.9% | 0.957% | 0.13% |
| 22 | CNH PARTNERS LLC | 1.4M | $74.0M | +444.5% | 0.935% | 1.22% |
| 23 | Capital World Investors | 1.2M | $61.6M | 0.0% | 0.779% | 0.01% |
| 24 | HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 1.1M | $56.8M | +274.9% | 0.718% | 0.09% |
| 25 | WATER ISLAND CAPITAL LLC | 922K | $47.4M | +42.4% | 0.599% | 6.32% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in JHG — a direct measure of their conviction.
Filings activity in JHG during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 476 | +3.9% | 88.39% | +7.97 pp | $7.06B | +9.9% |
| Q4 2025 | 458 | +13% | 80.42% | +3.32 pp | $6.42B | +4.3% |
| Q3 2025 | 407 | +4.9% | 77.10% | +8.93 pp | $6.16B | +13% |
| Q2 2025 | 388 | 4.4% | 68.17% | +4.83 pp | $5.45B | +7.6% |
| Q1 2025 | 406 | +2.0% | 63.34% | 16.25 pp | $5.06B | 20% |
| Q4 2024 | 398 | +5.6% | 79.59% | +12.22 pp | $6.36B | +18% |
| Q3 2024 | 377 | +13% | 67.37% | +7.00 pp | $5.38B | +12% |
| Q2 2024 | 333 | — | 60.37% | — | $4.82B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying JHG stock.
Based on Q1 2026 13F filings, institutional ownership of Janus Henderson Group plc stands at 88.4%, held across 476 reporting institutions.
TRIAN FUND MANAGEMENT, L.P. is the largest reported institutional holder of JHG, with approximately 31,867,800 shares worth $1.64B as of Q1 2026.
Yes — 2 widely-followed marquee investors appear among the top 25 institutional holders of JHG, including CITADEL ADVISORS LLC, MILLENNIUM MANAGEMENT LLC.
Our composite Smart Money Score for JHG is 66 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
101 institutions opened new positions in JHG during Q1 2026, while 83 fully exited. 290 added to existing positions and 81 trimmed.
JHG institutional ownership rose by 7.97 percentage points quarter-over-quarter, with a net change of +18 holders.
The top 10 institutions account for 59.1% of all reported 13F value in JHG, and the top 25 account for 78.7%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Janus Henderson Group plc (JHG) Institutional Ownership