Exhibit 99.1

Janus Henderson Group plc Reports First Quarter 2024 Results

LONDON — Janus Henderson Group plc (NYSE: JHG; “JHG," "Janus Henderson,” or the “Company”) published its first quarter 2024 results for the period ended March 31, 2024. First quarter 2024 operating income was US$119.2 million compared to US$143.7 million in the fourth quarter 2023 and US$100.4 million in the first quarter 2023. Adjusted operating income, adjusted for one-time, acquisition and transaction related costs, was US$128.2 million in the first quarter 2024 compared to US$156.2 million in the fourth quarter 2023 and US$105.6 million in the first quarter 2023.

First quarter 2024 diluted earnings per share of US$0.81 compared to US$0.74 in the fourth quarter 2023 and US$0.53 in the first quarter 2023. Adjusted diluted earnings per share of US$0.71 in the first quarter 2024 compared to US$0.82 in the fourth quarter 2023 and compared to US$0.55 in the first quarter 2023.

Acquisitions of NBK Capital Partners and Tabula Investment Management

Janus Henderson announced today that it has entered into a strategic partnership with NBK Wealth, the wealth management arm of the National Bank of Kuwait Group, whereby NBK Capital Partners ("NBKCP"), NBK Wealth's private investments team, will be acquired by Janus Henderson as the firm’s new emerging markets private capital division. The private investments team from NBK Wealth was established in 2006 and today is a leading alternative investments advisor across private credit and private equity strategies in emerging markets, including the Middle East and North Africa. Janus Henderson has a well-established history of investing in emerging markets, showcasing capabilities in emerging market equity and, more recently, enhancing its offerings with the addition of an emerging markets debt team. As investors look across the global market for differentiated investment opportunities, Janus Henderson believes emerging markets remain underpenetrated for private capital solutions and, therefore, present a key strategic growth area. The Company expects that partnering with NBK Wealth will provide Janus Henderson with the opportunity to tap into this rapidly expanding market, where there is increasing appetite from both sovereigns and corporates.

The Company also announced today that it has entered into an agreement to acquire Tabula Investment Management ("Tabula"), a leading independent ETF provider in Europe with an existing focus on fixed income and sustainable investment solutions. Established in 2018, Tabula has built an institutional-grade investment management and ETF platform with funds listed across 10 European exchanges, serving clients across 15 countries. The acquisition will build on Janus Henderson’s successful active ETF business in the U.S., where it is the fourth largest global provider of active fixed income ETFs by AUM.1 Janus Henderson believes partnering with Tabula will enable the Company to respond to client demand globally for its exceptional investment strategies to include an ETF wrapper. 

Financial terms of the transactions are not disclosed. Both transactions are expected to be completed in the second quarter 2024, subject to customary closing conditions, including regulatory approvals.

Ali Dibadj, Chief Executive Officer, stated:

The Company presents its financial results in US$ and in accordance with accounting principles generally accepted in the United States of America (“GAAP”). However, JHG management evaluates the profitability of the Company and its ongoing operations using additional non-GAAP financial measures. Management uses these performance measures to evaluate the business, and adjusted values are consistent with internal management reporting. See “Reconciliation of non-GAAP financial information” below for additional information.

SHARE REPURCHASE AND DIVIDEND

As part of the US$150 million on-market share repurchase program approved by the Board in October 2023, JHG purchased approximately 2.7 million of its ordinary shares on the New York Stock Exchange (NYSE) in the first quarter, for a total outlay of approximately US$81 million. 

On May 1, 2024, the Board declared a first quarter dividend in respect of the three months ended March 31, 2024, of US$0.39 per share. Shareholders on the register on the record date of May 13, 2024, will be paid the dividend on May 29, 2024. Additionally, on May 1, 2024, the Board authorized a new on-market share repurchase program under which JHG may repurchase, from time to time, up to $150 million of the Company’s common shares. This share repurchase program may be suspended, modified, or discontinued at any time, but any repurchases under the program must be made prior to the date of JHG’s 2025 Annual General Meeting of Shareholders.

Some JHG executives and employees obtain rights to receive shares of JHG common stock as part of their remuneration arrangements and employee entitlements. In order to satisfy these entitlements in a manner that is not dilutive to shareholders, the Board separately approved the repurchase of up to five million additional shares of common stock for the purpose of making grants to these executives and employees.

AUM AND FLOWS (in US$ billions)

FX reflects movement in AUM resulting from changes in foreign currency rates as non-US$ denominated AUM is translated into US$. Redemptions include impact of client switches.

Total comparative AUM and flows

Quarterly AUM and flows by capability

Average AUM by capability

INVESTMENT PERFORMANCE

% of AUM outperforming benchmark (as of March 31, 2024)

Outperformance is measured based on composite performance gross of fees versus primary benchmark, except where a strategy has no benchmark index or corresponding composite in which case the most relevant metric is used: (1) composite gross of fees versus zero for absolute return strategies, (2) fund net of fees versus primary index, or (3) fund net of fees versus Morningstar peer group average or median. Non-discretionary and separately managed account assets are included with a corresponding composite where applicable.

Cash management vehicles, ETF-enhanced beta strategies, Managed CDOs, Private Equity funds, and custom non-discretionary accounts with no corresponding composite are excluded from the analysis. Performance across all time periods excludes Intech, the sale of which was completed March 31, 2022. Excluded assets represent 3% of AUM. Capabilities defined by Janus Henderson.

% of mutual fund AUM in top 2 Morningstar quartiles (as of March 31, 2024)

Includes Janus Investment Fund, Janus Aspen Series and Clayton Street Trust (U.S. Trusts), Janus Henderson Capital Funds (Dublin based), Dublin and UK OEIC and Investment Trusts, Luxembourg SICAVs, and Australian Managed Investment Schemes. Performance across all time periods excludes Intech, the sale of which was completed March 31, 2022. The top two Morningstar quartiles represent funds in the top half of their category based on total return. For the 1-, 3-, 5-, and 10-year periods ending March 31, 2024, 53%, 58%, 55%, and 62% of the 188, 172, 163, and 146 total mutual funds, respectively, were in the top 2 Morningstar quartiles.

Analysis based on “primary” share class (Class I Shares, Institutional Shares, or share class with longest history for U.S. Trusts; Class A Shares or share class with longest history for Dublin based; primary share class as defined by Morningstar for other funds). Performance may vary by share class. Rankings may be based, in part, on the performance of a predecessor fund or share class and are calculated by Morningstar using a methodology that differs from that used by Janus Henderson. Methodology differences may have a material effect on the return and therefore the ranking. When an expense waiver is in effect, it may have a material effect on the total return, and therefore the ranking for the period.

Funds not ranked by Morningstar are excluded from the analysis. Capabilities defined by Janus Henderson. © 2024 Morningstar, Inc. All Rights Reserved.

FIRST QUARTER 2024 RESULTS BRIEFING INFORMATION

Chief Executive Officer Ali Dibadj and Chief Financial Officer Roger Thompson will present these results on May 2, 2024, on a conference call and webcast to be held at 9:00 a.m. ET.

Those wishing to participate should call:

Access to the webcast and accompanying slides will be available via the investor relations section of Janus Henderson’s website (ir.janushenderson.com).

About Janus Henderson 

Janus Henderson Group is a leading global active asset manager dedicated to helping clients define and achieve superior financial outcomes through differentiated insights, disciplined investments, and world-class service. As of March 31, 2024, Janus Henderson had approximately US$353 billion in assets under management, more than 2,000 employees, and offices in 24 cities worldwide. The firm helps millions of people globally invest in a brighter future together. Headquartered in London, Janus Henderson is listed on the NYSE.

FINANCIAL DISCLOSURES

Condensed consolidated statements of comprehensive income (unaudited)

Reconciliation of non-GAAP financial information

In addition to financial results reported in accordance with GAAP, we compute certain financial measures using non-GAAP components, as defined by the SEC. These measures are not in accordance with, or a substitute for, GAAP, and our financial measures may be different from non-GAAP financial measures used by other companies. We have provided a reconciliation of our non-GAAP components to the most directly comparable GAAP components. The following are reconciliations of GAAP revenue, operating expenses, operating income, net income attributable to JHG, and diluted earnings per share to adjusted revenue, adjusted operating expenses, adjusted operating income, adjusted net income attributable to JHG, and adjusted diluted earnings per share.

Condensed consolidated balance sheets (unaudited)

Condensed consolidated statements of cash flows (unaudited)

Basis of preparation

In the opinion of management of Janus Henderson Group plc, the condensed consolidated financial statements contain all normal recurring adjustments necessary to fairly present the financial position, results of operations, and cash flows of JHG in accordance with GAAP. Such financial statements have been prepared in accordance with the instructions to Form 10‑Q pursuant to the rules and regulations of the SEC. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. The financial statements should be read in conjunction with the annual consolidated financial statements and notes presented in Janus Henderson’s Annual Report on Form 10‑K for the year ended December 31, 2023, filed with the SEC (Commission File No. 001‑38103). Events subsequent to the balance sheet date have been evaluated for inclusion in the financial statements through the issuance date and are included in the notes to the condensed consolidated financial statements.

FORWARD-LOOKING STATEMENTS DISCLAIMER

Past performance is no guarantee of future results. Investing involves risk, including the possible loss of principal and fluctuation of value.

Certain statements in this press release not based on historical facts are “forward-looking statements” within the meaning of the federal securities laws, including the Private Securities Litigation Reform Act of 1995, as amended, Section 21E of the Securities Exchange Act of 1934, as amended, and Section 27A of the Securities Act of 1933, as amended. Such forward-looking statements involve known and unknown risks and uncertainties that are difficult to predict and could cause our actual results, performance, or achievements to differ materially from those discussed. These include statements as to our future expectations, beliefs, plans, strategies, objectives, events, conditions, financial performance, prospects, or future events, including with respect to the timing and anticipated benefits of pending transactions and expectations regarding acquisition opportunities. In some cases, forward-looking statements can be identified by the use of words such as “may,” “could,” “expect,” “intend,” “plan,” “seek,” “anticipate,” “believe,” “estimate,” “predict,” “potential,” “continue,” “likely,” “will,” “would,” and similar words and phrases. Forward-looking statements are necessarily based on estimates and assumptions that, while considered reasonable by us and our management, are inherently uncertain. Accordingly, you should not place undue reliance onforward-looking statements, which speak only as of the date they are made and are not guarantees of future performance. We do not undertake any obligation to publicly update or revise these forward-looking statements.

Various risks, uncertainties, assumptions, and factors that could cause our future results to differ materially from those expressed by the forward-looking statements included in this press release include, but are not limited to, risks, uncertainties, assumptions, and factors discussed in our Annual Report on Form 10-K for the year ended December 31, 2023, and in other filings or furnishings made by the Company with the SEC from time to time.

Annualized, pro forma, projected, and estimated numbers are used for illustrative purposes only, are not forecasts, and may not reflect actual results.

The information, statements, and opinions contained in this document do not constitute a public offer under any applicable legislation or an offer to sell or solicitation of any offer to buy any securities or financial instruments or any advice or recommendation with respect to such securities or other financial instruments.

Not all products or services are available in all jurisdictions.

Janus Henderson is a trademark of Janus Henderson Group plc or one of its subsidiaries.

© Janus Henderson Group plc.