JANUS HENDERSON GROUP PLC (JHG) — Institutional Holders & Hedge Fund Ownership
JANUS HENDERSON GROUP PLC (JHG) institutional ownership: 2 hedge funds and institutional investors, holding 32.6M shares ($1.67B), as of Q1 2026, per SEC Form 13F-HR filings.
Quarterly 13F filings reveal which hedge funds, family offices, and institutional investors hold JANUS HENDERSON GROUP PLC (JHG) — and how their positions changed versus the prior quarter. Pactolio aggregates these SEC Form 13F-HR filings into one view: top institutional holders, biggest QoQ buyers and sellers, and consolidated ownership changes for JHG.
The top JHG shareholders by portfolio weight are Trian Fund Management (42.41%) and Glazer Capital (0.74%). In Q1 2026, Glazer Capital made the largest position increase (+0.18%).
Top 2 Institutional Holders of JANUS HENDERSON GROUP PLC (JHG) — Q1 2026
| # | Fund | Shares | Market Value | Portfolio Weight |
|---|---|---|---|---|
| 1 | Trian Fund Management | 31,867,800 | $1.64B | 42.41% |
| 2 | Glazer Capital | 682,254 | $35.0M | 0.74% |
- 2Hedge funds holding
- 32,550,054Shares held (disclosed)
- $1.67B13F market value
- 21.58%Median portfolio weight
Ownership History
Quarter-by-quarter share count, market value, and portfolio conviction weight (up to 5 of the heaviest weight-by-portfolio funds) of JHG. Sourced from 13F filings; reflects long equity positions only.
Quarter-over-Quarter ActivityQ1 2026
The biggest weight-increase and weight-decrease changes among funds that hold JHG. Deltas compare the selected filing to the previous reporting quarter.
Top buyers
- Glazer Capital+0.18% · +233,199 shares
Top sellers
- Ariel Investments-0.60% · -2,338,654 shares
Options Activity
- Total puts221 (+221)
Ownership Statistics
- Funds holding
- 2
- Median weight
- 21.58%
- Largest holder
- Trian Fund Management · 42.41%
- Smallest holder
- Glazer Capital · 0.74%
- Shares held
- 32,550,054 (-2,105,455)
All Institutional HoldersSortable · searchable
All institutional investors (Max 50) holding JHG in the selected quarter. Click a fund name to drill into its full 13F portfolio.
| 1 | Trian Fund Management | 31,867,800 | $1.64B | 42.41% |
| 2 | Glazer Capital | 682,254 | $35.0M | 0.74% |
Methodology & FAQ
Methodology: How We Track JHG Institutional Holdings
Our data is systematically aggregated directly from quarterly Form 13F-HR disclosures submitted to the U.S. Securities and Exchange Commission (SEC).
- Who Must File (Reporting Threshold): This dataset includes filings from U.S. institutional investment managers, hedge funds, mutual funds, university endowments, and family offices managing at least $100 million in Section 13(f) securities (including equities, options, convertibles, ETFs, and warrants).
- What is Included (Data Scope): We capture long positions in Section 13(f) securities for JANUS HENDERSON GROUP PLC (JHG). By SEC regulation, 13F filings do not require the disclosure of short positions, non-U.S. holdings, or OTC derivatives. Listed options are excluded from portfolio weight calculations to ensure comparability across filers.
- Portfolio Weight Explained (Metric Definition): “Portfolio Weight” shows how much of a fund's total reported 13F portfolio value (excluding listed options) is allocated to JHG on the specific reporting date.
- How to Use This Data (Interpretation): Quarter-over-quarter changes in shares and portfolio weight reflect a combination of active trading and market price movements. These are descriptive metrics of fund allocation, not explicit buy or sell signals.
How do you measure hedge fund conviction and institutional concentration in JHG?
We evaluate fund conviction by looking at portfolio weight rather than just absolute share count. By tracking how the largest holders —such as Trian Fund Management and Glazer Capital as of Q1 2026— change their position sizing quarter-over-quarter, we help investors distinguish between deliberate position sizing changes and passive mark-to-market drift.
Does the JHG ownership data include short interest or options?
SEC Form 13F mandates the disclosure of long positions in Section 13(f) securities, which includes equities and listed options (put and call contracts), but excludes short interest, swaps, and OTC derivatives by regulatory design. On this platform, listed options are excluded from portfolio weight calculations to ensure comparability across filers.
Are family offices and university endowments included in this JHG data?
Yes. In addition to traditional hedge funds and large asset managers, any institutional entity exercising investment discretion over at least $100 million in Section 13(f) securities must file a Form 13F. This explicitly includes single-family offices and university endowments. If a qualifying family office or endowment holds JHG stock, their allocation is systematically aggregated alongside traditional fund data.
When is the institutional ownership data updated, and is there a reporting lag?
Institutional investment managers are required to file their Form 13F within 45 days after the end of a calendar quarter (the standard “T+45” window). Our platform re-ingests new filings from the SEC EDGAR database on a nightly cycle, typically within 24–48 hours of publication, providing a point-in-time snapshot of reported consensus positioning for JHG as of each filing date.