PART I — FINANCIAL INFORMATION

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

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

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

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JANUS HENDERSON GROUP PLC

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 will be USD.

The Condensed Consolidated Statements of Comprehensive Income for the three and six months ended June 30, 2017, include JCG results from the Closing Date. The Condensed Consolidated Balance Sheet reflects the financial position of JHG at June 30, 2017. See Note 2 - Acquisitions, for more information on the Merger.

Recent Accounting Pronouncements Not Yet Adopted

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”), and is focused on the assessment of its mutual fund performance fees and the related applicability of the new guidance. Currently, JHG does not expect a change in accounting treatment for mutual fund performance fees or other operating revenues upon adoption of the new guidance. However, the Group’s evaluation is ongoing and not complete.

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) 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. The Group is evaluating the effect of adopting this new accounting standard.

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 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.

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. The Group’s assessment is ongoing and not complete.

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. The Group is evaluating the effect of adopting this new accounting standard.

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. The Group is evaluating the effect of adopting this new accounting standard.

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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 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”).

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.

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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 related estimated useful lives are presented in the following table (in millions):

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

Amortization expense was $5.1 million and $8.7 million for the three and six months ended June 30, 2017, respectively, and $3.7 million and $7.4 million and for the same periods ended June, 2016. Expected future amortization expense is summarized below (in millions):

Debt

Debt was valued using quoted market prices, 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 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

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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 at June 30, 2017, of $27.9 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 of 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.

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 material adjustment made was the inclusion of the JCG results for the periods.

Options

On the Closing Date of the Merger, JHG granted Dai-ichi Life Holdings Inc. (“Dai-ichi”) 20 tranches of conditional options 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 of the options was £19.8 million ($25.7 million). The options can be exercised by Dai-ichi for the period from the Closing Date of the Merger until October 3, 2018.

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.

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Note 3 — Consolidation

Variable Interest Entities

Consolidated Variable Interest Entities

JHG’s consolidated variable interest entities (“VIEs”) as of June 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.

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

Unconsolidated Variable Interest Entities

At June 30, 2017, and December 31, 2016, JHG’s carrying values of investment securities included on the Condensed Consolidated Balance Sheets pertaining to unconsolidated VIEs was $1.1 million and nil, respectively. JHG’s total exposure to unconsolidated VIEs represents the value of its economic ownership interest in the investment securities.

JHG’s total exposure to consolidated VREs represents the value of its economic ownership interest in these seeded investment products. Valuation changes associated with investments held at fair value are reflected in investment gains (losses), net on the Group’s Condensed Consolidated Statements of Comprehensive Income. Valuation changes are partially offset in net loss attributable to noncontrolling interests for the portion not attributable to JHG. Refer to Note 4 — Investment Securities.

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JHG may not, under any circumstances, access cash and cash equivalents held by consolidated VREs to use in its operating activities or for any other purpose.

Unconsolidated Voting Rights Entities

At June 30, 2017, and December 31, 2016, JHG’s carrying value of investment securities included on the Condensed Consolidated Balance Sheets pertaining to unconsolidated VREs was $52.0 million and $4.9 million, respectively. JHG’s total exposure to unconsolidated VREs represents the value of its economic ownership interest in the investment securities.

Note 4 — Investment Securities

JHG’s investment securities as of June 30, 2017, and December 31, 2016, are summarized as follows (in millions):