Who owns Janus Henderson Group Ltd., from the filings themselves: stakes over 5% (Schedule 13D/G), the institutional managers reporting the stock each quarter (13F), and the funds holding it (N-PORT).
Investors crossing 5% ownership must disclose it. Schedule 13G filers certify the stake is passive; Schedule 13D is the general form for everyone else — founders, strategic holders, and activists alike. Each entry is the holder's most recent disclosure. Coverage begins with SEC's structured filings from December 18, 2024; a holder appears once they file or amend after that date.
Massachusetts Mutual Life Insurance Company: 0.0% · 0 shares
Nelson Peltz: 0.0% · 0 shares — Peter W. May: 0.0% · 0 shares — Trian Fund Management, L.P.: 13.0% · 0 shares
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Sign up freeEvery institutional manager whose latest 13F reports this stock, largest position first. "% of their portfolio" is the weight inside that manager's own book — how much conviction the position represents; "% of company" is how much of Janus Henderson Group Ltd. they hold. Together these 606 managers report 107.87% of shares outstanding.
| Investor | Position value | Shares | % of their portfolio | % of company | As of |
|---|---|---|---|---|---|
| TRIAN FUND MANAGEMENT, L.P. | $1.33B | 25,654,382 | 31.53% | 16.65% | June 30, 2026 |
| BlackRock, Inc. | $719M | 13,846,329 | 0.01% | 8.99% | June 30, 2026 |
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See every manager reporting Janus Henderson Group Ltd., how much of the company they hold, and how big the position is inside their own portfolio.
Sign up freeFunds disclosing this stock in their monthly N-PORT portfolio, with the position's share of the fund's net assets. Together these 132 funds hold 12.52% of shares outstanding — counted inside the manager totals above, not on top of them, since a fund's shares also appear in its manager's 13F.
| Fund | Position value | % of net assets | % of company | As of |
|---|---|---|---|---|
| VANGUARD TOTAL STOCK MARKET INDEX FUND | $203M | 0.01% | 2.54% | June 30, 2026 |
| VANGUARD SMALL-CAP INDEX FUND | $147M | 0.08% | 1.83% | June 30, 2026 |
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