UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

x      QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2017

OR

o         TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

for the transition period from                to              

Commission File Number 001-38103

Janus Henderson Group plc

(Exact name of registrant as specified in its charter)

+44 (0) 20 7818 1818

(Registrant’s telephone number, including area code)

N/A

(Former name, former address and former fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Company was required to file such reports), and (2) has been subject to the filing requirements for the past 90 days. Yes x   No o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).  Yes x    No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company.  See the definitions of “large accelerated filer,” “accelerated filer,” “non-accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the

Exchange Act. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes o                                           No x

As of November 6, 2017, there were 200,406,138 shares of the Group’s common stock, $1.50 par value per share, issued and outstanding.

PART I – FINANCIAL INFORMATION

Item 1.  Financial Statements

JANUS HENDERSON GROUP PLC

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED)

(Dollars in Millions, Except Share Data)

The accompanying notes are an integral part of these condensed consolidated financial statements.

2

JANUS HENDERSON GROUP PLC

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED)

(Dollars in Millions, Except per Share Data)

The accompanying notes are an integral part of these condensed consolidated financial statements.

3

JANUS HENDERSON GROUP PLC

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)

(Dollars in Millions)

The accompanying notes are an integral part of these condensed consolidated financial statements.

4

JANUS HENDERSON GROUP PLC

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (UNAUDITED)

(Amounts in Millions)

The accompanying notes are an integral part of these condensed consolidated financial statements.

5

JANUS HENDERSON GROUP PLC

NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

Note 1 — Basis of Presentation

In the opinion of management of Janus Henderson Group plc (“JHG” or “the Group”), previously Henderson Group plc (“Henderson”), the accompanying condensed consolidated financial statements contain all adjustments necessary to fairly present the financial position, results of operations and cash flows of JHG in accordance with accounting principles generally accepted in the United States of America (“GAAP”). Such financial statements have been prepared in accordance with the instructions to Form 10-Q pursuant to the rules and regulations of the Securities and Exchange Commission (“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. These financial statements should be read in conjunction with the annual consolidated financial statements and notes included in the Henderson annual financial statements for the year ended December 31, 2016, which can be found in JHG’s prospectus dated March 21, 2017, as filed with the SEC pursuant to Rule 424(b) under the Securities Act of 1933, as amended (File No. 333-216824) (the “Prospectus”). Events subsequent to the balance sheet date have been evaluated for inclusion in the accompanying financial statements through the issuance date and are included in the notes to the condensed consolidated financial statements.

The Group had $9.9 million and $30.1 million of stock-based compensation costs and nil and $8.3 million of proceeds from stock-based compensation plans included in retained earnings during the nine-month periods ended September 30, 2017, and September 30, 2016, respectively. Prior to the Group’s Extraordinary General Meeting (“EGM”) on April 26, 2017, the Group’s articles of association did not allow the Group to recognize these items in additional paid-in-capital. A change in the Group’s articles of association was approved at the EGM and from April 26, 2017, all costs in relation to stock-based compensation will be recognized in additional paid-in-capital. The accumulated balance in relation to stock-based compensation plans within retained earnings as of September 30, 2017, and December 31, 2016, was $(105.4) million and $(92.9) million, respectively.

Share Redenomination and Consolidation

On April 26, 2017, Henderson redenominated its ordinary shares from Great British pound (“GBP”) to U.S. dollar (“USD”), resulting in a change in par value from £0.125 to $0.1547 per share. At that time, Henderson had 1,131,842,110 shares in issue and as a result the ordinary share nominal capital became $175.1 million. The difference between the revised ordinary share nominal capital balance of $175.1 million and the previously stated ordinary share nominal capital balance of $234.4 million (converted at the historic exchange rate rather than the rate required for the redenomination under Jersey company law) was recognized as a component of additional paid-in-capital. Consequently, the additional paid-in-capital balance was adjusted from $1,237.9 million to $1,297.2 million.

Additionally, in accordance with a special resolution passed by the shareholders on May 3, 2017, the par value of the shares of Henderson was reduced to $0.15 per share, from $0.1547 per share, and the total ordinary share nominal capital became $169.8 million. In accordance with that resolution, the reduction in the total ordinary share nominal capital of $5.3 million was credited to the additional paid-in-capital account, which moved from $1,297.2 million to $1,302.5 million.

On April 26, 2017, the shareholders approved a 10-to-1 share consolidation, which took effect on May 30, 2017. As a result of the share consolidation, the number of shares in issue was reduced by a factor of 10, and the par value of the shares became $1.50.

Merger with Janus Capital Group Inc.

On May 30, 2017 (the “Closing Date”), Henderson and Janus Capital Group Inc. (“JCG”), a U.S.-based asset manager, announced the completion of an all-stock merger of equals (“the Merger”). The Merger is expected to accelerate the Group’s strategic objectives for growth, diversification and the creation of a global active investment manager. Based on an evaluation of the Merger agreement provisions, Henderson was determined to

6

be the acquirer for accounting purposes. The historical financial statements and notes included herein represent Henderson.

Prior to the Merger, Henderson’s functional currency was GBP. After consideration of numerous factors, management concluded that the post-Merger functional currency of JHG is USD.

The Condensed Consolidated Statement of Comprehensive Income for the nine months ended September 30, 2017, includes JCG results from the Closing Date. See Note 2 — Acquisitions, for more information on the Merger.

Recent Accounting Pronouncements Not Yet Adopted

Revenue Recognition

In May 2014, the Financial Accounting Standards Board (“FASB”) issued a new revenue recognition standard. The standard’s core principle is that a company will recognize revenue to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In addition, the standard specifies the accounting for certain costs to obtain or fulfill a contract with a customer and expands disclosure requirements for revenue recognition. The revenue standard is effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. The Group is evaluating the effect of adopting this new accounting standard, including the amending Accounting Standards Update (“ASU”). Management is currently reviewing the terms and conditions of its revenue contracts. While this review is ongoing, the Group does not expect a significant change in the timing of revenue recognition for its management fees, performance fees, servicing fees and its other revenue upon adoption of the new guidance. However, the Group’s evaluation is not complete.

In March 2016, the FASB issued an amendment to its principal-versus-agent guidance in the FASB’s new revenue standard. The key provisions of the amendment are assessing the nature of the entity’s promise to the customer, identifying the specified goods or services, and applying the control principle and indicators of control. The amendment is effective for annual reporting periods beginning after December 15, 2017, including interim periods within those annual reporting periods. In addition, entities are required to adopt the amendment by using the same transition method they used to adopt the new revenue standard. The Group’s principal-versus-agent assessment is focused on treatment of distribution fees collected from mutual fund assets and whether such fees should be reported as revenue (1) on a gross basis or (2) on a net basis, where such fees are reduced by distribution fees paid by the Group to intermediaries. Presently, certain distribution and servicing fees are presented on a gross basis, while others are presented on a net basis, with respective presentations dictated by the terms of the underlying distribution and servicing agreements. While the Group’s assessment is ongoing and not complete, management currently anticipates presenting all distribution and servicing fees on a gross basis upon adoption of the new guidance.

Financial Instruments

In January 2016, the FASB issued amendments to its financial instruments standard, including changes relating to the accounting for equity investments and the presentation and disclosure requirements for financial instruments. Under the amended guidance, all equity investments in unconsolidated entities (other than those accounted for using the equity method of accounting) will generally be measured at fair value through earnings. There will no longer be an available-for-sale classification (changes in fair value reported in other comprehensive income) for equity securities with readily determinable fair values. The amended guidance also requires financial assets and financial liabilities to be presented separately in the notes to the financial statements, grouped by measurement category (e.g., fair value, amortized cost, lower of cost or market value) and form of financial asset (e.g., loans, securities). The standard is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Although the Group is evaluating the effect of adopting this new accounting standard, management does not expect the adoption to have a material impact on its results of operations or cash flows.

Leases

In February 2016, the FASB issued a new standard on accounting for leases. The new standard represents a significant change to lease accounting and introduces a lessee model that brings most leases onto the balance sheet. The standard also aligns certain of the underlying principles of the new lessor model with those in the FASB’s new revenue recognition standard. Furthermore, the new standard addresses other concerns related to

7

the current leases model. The standard is effective for fiscal years beginning after December 15, 2018. The Group is evaluating the effect of adopting this new accounting standard.

Statements of Cash Flows

In August 2016, the FASB issued an ASU to clarify guidance on the classification of certain cash receipts and cash payments in the statements of cash flows. The FASB issued the ASU with the intent of reducing diversity in practice regarding eight types of cash flows. The ASU is effective for annual reporting periods beginning after December 15, 2017, including interim periods within those annual reporting periods. Although the Group is evaluating the effect of adopting this new accounting standard, management does not expect the adoption to have a material impact on the Consolidated Statements of Cash Flows.

In November 2016, the FASB issued an ASU to clarify guidance on the classification and presentation of restricted cash in the statements of cash flows. The ASU is effective for annual reporting periods beginning after December 15, 2017, including interim periods within those annual reporting periods. Although the Group is evaluating the effect of adopting this new accounting standard, management does not expect the adoption to have a material impact on the Consolidated Statements of Cash Flows.

Goodwill Impairment Testing

In January 2017, the FASB issued an ASU that simplifies the accounting for goodwill impairments by eliminating step two from the goodwill impairment test. The ASU requires goodwill impairments to be measured on the basis of the fair value of the reporting unit relative to the reporting unit’s carrying amount rather than on the basis of the implied amount of goodwill relative to the goodwill balance of the reporting unit. The ASU is effective for annual and interim impairment tests for periods beginning after December 15, 2021. Early adoption is allowed for annual and interim impairment tests occurring after January 1, 2017. The Group will complete its annual goodwill impairment tests according to the new guidance.

Hedge Accounting

In August 2017, the FASB issued an ASU that amends hedge accounting. The ASU expands the strategies eligible for hedge accounting, changes how companies assess hedge effectiveness and will require new disclosures and presentation. The ASU is effective on January 1, 2019, for calendar year-end companies; however, early adoption is permitted. The Group is evaluating the effect of adopting this new accounting standard.

Note 2 — Acquisitions

Merger with JCG

On the Closing Date, pursuant to the Agreement and Plan of Merger dated as of October 3, 2016 (the “Merger Agreement”), by and among JCG, a Delaware corporation, Henderson, a company incorporated in Jersey, and Horizon Orbit Corp., a Delaware corporation and a direct and wholly owned subsidiary of Henderson (“Merger Sub”), Merger Sub merged with and into JCG, with JCG surviving such merger as a direct and wholly owned subsidiary of Henderson. Upon closing of the Merger, Henderson became the parent holding company for the combined group and was renamed Janus Henderson Group plc.

Upon closing of the Merger, holders of JCG common stock received 0.47190 fully paid and non-assessable JHG ordinary shares with a par value of $1.50 per share (the “Ordinary Shares”) for each share of JCG common stock held, plus cash in lieu of any fractional shares based on prevailing market prices. Effective immediately prior to the closing of the Merger, Henderson implemented a share consolidation of ordinary shares at a ratio of one Ordinary Share (or Chess Depositary Interest (“CDI”), as applicable) for every 10 ordinary shares (or CDIs, as applicable) outstanding.

The fair value of consideration transferred to JCG common stockholders was $2,600.7 million, representing 87.2 million shares of JHG transferred at a share price of $30.75 each as of the Closing Date, adjusted for a post-combination stock-based compensation charge for unvested shares in relation to JCG share plans.

The issuance of JHG shares in connection with the Merger was registered under the Securities Act of 1933, as amended, pursuant to JHG’s registration statement on Form F- 4 (File No. 333- 216824) filed with the SEC on March 20, 2017 (the “Registration Statement”).

8

Preliminary Fair Values of Assets Acquired and Liabilities Assumed

Preliminary estimates of fair values of the assets acquired and liabilities assumed are based on information available as of the closing of the Merger. The Group is continuing to evaluate the underlying inputs and assumptions used in its valuations. Accordingly, these preliminary estimates are subject to change during the measurement period, which is up to one year from the closing of the Merger. The preliminary allocation of the consideration transferred to the assets acquired and liabilities assumed is presented in the following table (in millions):

Goodwill

Goodwill primarily represents the value JHG expects to obtain from growth opportunities and synergies for the combined operations. Goodwill is not deductible for tax purposes.

Intangible Assets

Acquired intangible assets include the value of investment advisory agreements for mutual funds, separate accounts and exchange traded products (“ETPs”). Also included are the values of acquired trademarks, which include trademarks for Janus Capital Management LLC (“Janus”), Intech Investment Management LLC (“Intech”), Kapstream Capital Pty Limited (“Kapstream”), Perkins Investment Management LLC (“Perkins”) and VS Holdings Inc. (“VelocityShares”). Preliminary estimates of acquired intangible assets and their weighted-average estimated useful lives are presented in the following table (in millions):

9

The following table presents movements in intangible assets during the period (in millions):

Amortization expense was $7.0 million and $15.7 million for the three and nine months ended September 30, 2017, respectively, and $3.7 million and $11.1 million for the same periods in 2016. Expected future amortization expense is summarized below (in millions):

Debt

The fair value of JHG’s debt was valued using broker quotes and recent trading activity, which are considered fair value Level 2 inputs.

The acquired 0.750% Convertible Senior Notes due 2018 (“2018 Convertible Notes”) may be wholly or partially settled in cash, and thereby the liability and conversion feature components are accounted for separately. The $115.2 million liability component at the Closing Date was determined by discounting future contractual cash flows at a 1.9% rate, which is consistent with the estimated market interest rate for similar senior notes with no conversion option. The liability component will accrete up to the face value of $116.6 million, through interest expense, over the remaining term of the notes. The $42.9 million equity component was determined as the difference between the liability component and the fair value of the notes at the Closing Date.

The 4.875% Senior Notes due 2025 (“2025 Senior Notes”) were recorded at their fair value of $323.7 million at the time of the Merger. The 2025 Senior Notes include unamortized debt premium, net at September 30, 2017, of $22.7 million, which will be amortized over the remaining life of the notes through interest expense. The unamortized debt premium is recorded as a liability within long-term debt on JHG’s Condensed Consolidated Balance Sheets.

Deferred Tax Liabilities, Net

Deferred income taxes primarily relate to deferred income tax balances acquired from JCG and the deferred tax impact of fair value adjustments to the assets and liabilities acquired from JCG, including intangible assets and long-term debt. Deferred income taxes were provisionally estimated based on statutory tax rates in the jurisdictions of the legal entities where the acquired assets and liabilities are taxed. Tax rates used are continually assessed, and updates to deferred income tax estimates are based on any changes to provisional valuations of the related assets and liabilities and refinement of the effective tax rates, which could result in changes to these provisional values.

10

Pro Forma Results of Operations

The following table presents summarized unaudited supplemental pro forma operating results as if the Merger had occurred at the beginning of each of the periods presented (in millions):

The only adjustment made was the inclusion of the JCG results for the periods presented.

JCG Results of Operations

Revenue (inclusive of revenue from certain mandates transferred to JCG from Henderson after the Merger) and net income of JCG from the Closing Date through the end of the third quarter of 2017 included in JHG’s Condensed Consolidated Statements of Comprehensive Income are presented in the following table (in millions):

Options

On the Closing Date of the Merger, JHG sold 20 tranches of conditional options to Dai-ichi Life Holdings Inc. (“Dai-ichi”), with each tranche allowing Dai-ichi to purchase 500,000 JHG ordinary shares at a strike price of £29.972 per share (the terms of such options having been adjusted in accordance with the terms of the Dai-ichi Option Agreement to take account of the effect of the share consolidation). The cash consideration received for the options was £19.8 million ($25.7 million). The options can be exercised by Dai-ichi during the period from the Closing Date of the Merger until October 3, 2018. As of September 30, 2017, the fair value of the options was $17.5 million.

Contingent Consideration

Acquisitions prior to the Merger included contingent consideration. Refer to Note 5 — Fair Value Measurements for a detailed discussion of the terms of the contingent consideration.

Note 3 — Consolidation

Variable Interest Entities

Consolidated Variable Interest Entities

JHG’s consolidated variable interest entities (“VIEs”) as of September 30, 2017, include certain consolidated seeded investment products in which the Group has an investment and acts as the investment manager. The assets of these VIEs are not available to JHG or the creditors of JHG. JHG may not, under any circumstances, access cash and cash equivalents held by consolidated VIEs to use in its operating activities or otherwise. In addition, the investors in these VIEs have no recourse to the credit of the Group.

11

Consolidated VIE assets and liabilities, presented after intercompany eliminations, at September 30, 2017, and December 31, 2016, are as follows (in millions):