UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

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

For the quarterly period ended December 31, 2016

OR

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

Commission File Number: 001-36690

Zayo Group Holdings, Inc.

(Exact Name of Registrant as Specified in Its Charter)

1805 29th Street, Suite 2050,

Boulder, CO 80301

(Address of Principal Executive Offices)

(303) 381-4683

(Registrant’s Telephone Number, Including Area Code)

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 registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.     Yes  ☒    No  ☐

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, 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  ☒    No  ☐

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

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ☐    No   ☒

The number of outstanding shares of common stock of Zayo Group Holdings, Inc. as of February 7, 2017, was 244,115,095 shares.

ZAYO GROUP HOLDINGS, INC. AND SUBSIDIARIES

INDEX 

ZAYO GROUP HOLDINGS, INC. AND SUBSIDIARIES

PART I. FINANCIAL INFORMATION

ITEM 1.FINANCIAL STATEMENTS (UNAUDITED)

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED)

(in millions, except share amounts)

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

ZAYO GROUP HOLDINGS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED)

(in millions, except per share data)  

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

ZAYO GROUP HOLDINGS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS)/INCOME (UNAUDITED)

(in millions)

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

ZAYO GROUP HOLDINGS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS’ EQUITY (UNAUDITED)

SIX MONTHS ENDED DECEMBER 31, 2016

(in millions, except share data)

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

ZAYO GROUP HOLDINGS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)

(in millions)

Refer to Note 2 — Acquisitions for details regarding the Company’s recent acquisitions.

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

(1) BUSINESS AND BASIS OF PRESENTATION

Business

Zayo Group Holdings, Inc., a Delaware corporation, was formed on November 13, 2007, and is the parent company of a number of subsidiaries engaged in bandwidth infrastructure services. Zayo Group Holdings, Inc. and its subsidiaries are collectively referred to as “Zayo Group Holdings” or the “Company.” The Company’s primary operating subsidiary is Zayo Group, LLC (“ZGL”). Headquartered in Boulder, Colorado, the Company operates bandwidth infrastructure assets, including fiber networks and data centers, in the United States, Canada and Europe to offer:

The Company’s shares are listed on the New York Stock Exchange (NYSE) under the ticker symbol “ZAYO”.

Basis of Presentation

The accompanying condensed consolidated financial statements include all the accounts of the Company and its wholly-owned subsidiaries. All inter-company accounts and transactions have been eliminated in consolidation. The accompanying consolidated financial statements and related notes are unaudited and have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial reporting and pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) for quarterly reports on Form 10-Q, and do not include all of the note disclosures required by GAAP for complete financial statements. These consolidated financial statements should, therefore, be read in conjunction with the consolidated financial statements and notes thereto for the year ended June 30, 2016 included in the Company’s Annual Report on Form 10-K for the year ended June 30, 2016. In the opinion of management, all adjustments considered necessary for a fair presentation of financial position, results of operations and cash flows of the Company have been included herein. Certain amounts in the prior period financial statements have been condensed to conform to the current period presentation and had no impact on reported net income or losses. The results of operations for the three and six months ended December 31, 2016 are not necessarily indicative of the operating results for any future interim period or the full year.

The Company’s fiscal year ends June 30 each year, and we refer to the fiscal year ended June 30, 2016 as “Fiscal 2016” and the fiscal year ending June 30, 2017 as “Fiscal 2017.”

Earnings or Loss per Share

Basic earnings or loss per share attributable to the Company’s common shareholders is computed by dividing net earnings or loss attributable to common shareholders by the weighted average number of common shares outstanding for the period.   Diluted earnings or loss per share attributable to common shareholders presents the dilutive effect, if any, on a per share basis of potential common shares (such as restricted stock units) as if they had been vested or converted during the periods presented. No such items were included in the computation of diluted loss per share for the three and six months ended December 31, 2015 as the Company incurred a loss from operations in that period and the effect of inclusion would have been anti-dilutive. 

The effect of 2.1 million and 2.0 million incremental shares attributable to the release of Part A and Part B units upon vesting (treasury method) were included in the computation of diluted income per share for the three and six months ended December 31, 2016, respectively.

Significant Accounting Policies

Upon early adoption of ASU 2016-09 (as described below), the Company elected to change its accounting policy to account for forfeitures as they occur versus estimating forfeitures. The Company recognizes all stock-based awards to employees and independent directors based on their grant-date fair values, with no consideration for future forfeitures. The Company recognizes the fair value of outstanding awards as a charge to operations over the vesting period.

There have been no other changes to the Company’s significant accounting policies described in its Annual Report on Form 10-K for the year ended June 30, 2016.

Use of Estimates

The preparation of the Company’s condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expense during the reporting period. Significant estimates are used when establishing allowances for doubtful accounts and accruals for billing disputes, determining useful lives for depreciation and amortization and accruals for exit activities associated with real estate leases, assessing the need for impairment charges (including those related to intangible assets and goodwill), determining the fair values of assets acquired and liabilities assumed in business combinations, accounting for income taxes and related valuation allowances against deferred tax assets, determining the defined benefit costs and defined benefit obligations related to post-employment benefits and estimating the restricted stock unit grant fair values used to compute the stock-based compensation liability and expense. Management evaluates these estimates and judgments on an ongoing basis and makes estimates based on historical experience, current conditions, and various other assumptions that are believed to be reasonable under the circumstances. The results of these estimates form the basis for making judgments about the carrying values of assets and liabilities as well as identifying and assessing the accounting treatment with respect to commitments and contingencies. Actual results may differ from these estimates under different assumptions or conditions.

Recently Issued Accounting Pronouncements

In January 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2017-01, “Business Combinations (Topic 805): Clarifying the Definition of a Business.” The new standard provides guidance for evaluating whether transactions should be accounted for as acquisitions of assets or businesses. The standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, with early adoption permitted for transactions for which the acquisition date occurs before the issuance date or effective date, only when the transaction has not been reported in financial statements that have been issued or made available for issuance. The Company has elected to early adopt the standard as of January 1, 2017 and will apply the provisions of this standard for acquistions consummated subsequent to that date.

In August 2016, the FASB issued ASU 2016-15, "Statement of Cash Flows (Topic 230): Classifications of Certain Cash Receipts and Cash Payments." The new standard provides guidance for eight changes with respect to how cash receipts and cash payments are classified in the statement of cash flows, with the objective of reducing diversity in practice. The standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 31, 2017, with early adoption permitted. The Company does not plan to early adopt, nor does it expect the adoption of this new standard to have a material impact on its condensed consolidated financial statements.

In February 2016, the FASB issued ASU 2016-02, Leases. The new guidance supersedes existing guidance on accounting for leases in Topic 840 and is intended to increase the transparency and comparability of accounting for lease transactions. ASU 2016-02 requires most leases to be recognized on the balance sheet. Lessees will need to recognize a

right-of-use asset and a lease liability for virtually all leases. The liability will be equal to the present value of lease payments. The asset will be based on the liability, subject to adjustment, such as for initial direct costs. For income statement purposes, the FASB retained a dual model, requiring leases to be classified as either operating or finance. Lessor accounting remains similar to the current model, but updated to align with certain changes to the lessee model and the new revenue recognition standard (ASU 2014-09). The ASU will require both quantitative and qualitative disclosures regarding key information about leasing arrangements. The standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Early adoption is permitted. The new standard must be adopted using a modified retrospective transition, and provides for certain practical expedients. Transition will require application of the new guidance at the beginning of the earliest comparative period presented. The Company is evaluating the effect that ASU 2016-02 will have on its consolidated financial statements and related disclosures. The Company has not yet selected a transition method nor has it determined the effect of the standard on its ongoing financial reporting.

On March 30, 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting, which is intended to improve the accounting for share-based payment transactions as part of the FASB’s simplification initiative. The ASU changes five aspects of the accounting for share-based payment award transactions that will affect public companies, including: (1) accounting for income taxes; (2) classification of excess tax benefits on the statement of cash flows; (3) forfeitures; (4) minimum statutory tax withholding requirements; and (5) classification of employee taxes paid on the statement of cash flows when an employer withholds shares for tax-withholding purposes. The Company early-adopted ASU 2016-09 effective July 1, 2016. Excess tax benefits for share-based payments are now recognized against income tax expense rather than additional paid-in capital and are included in operating cash flows rather than financing cash flows. The recognition of excess tax benefits have been applied prospectively and prior periods have not been adjusted. The Company had $4.3 million of excess tax benefits for the six months ended December 31, 2016.  In addition, the Company elected to change its accounting policy to account for forfeitures as they occur. The change was applied on a modified retrospective basis with a cumulative effect adjustment to accumulated deficit of $1.7 million as of July 1, 2016. Amendments related to minimum statutory tax withholding requirements and the classification of employee taxes paid on the statement of cash flows when an employer withholds shares for tax-withholding purposes have been adopted prospectively and did not have a material impact on the condensed consolidated financial statements.

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers, which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The ASU will replace most existing revenue recognition guidance in GAAP when it becomes effective. In July 2015, the FASB deferred the effective date to annual reporting periods and interim reporting periods within annual reporting periods beginning after December 15, 2017.  Early adoption is permitted as of the original effective date or annual reporting periods and interim reporting periods within annual reporting periods beginning after December 15, 2016. The standard permits the use of either the retrospective or cumulative effect transition method. The Company is evaluating the effect that ASU 2014-09 will have on the Company and its consolidated financial statements and related disclosures. The Company has not yet selected a transition method nor has it determined the effect of the standard on its ongoing financial reporting.

(2) ACQUISITIONS

Since inception, the Company has consummated 39 transactions accounted for as business combinations. The acquisitions were executed as part of the Company’s business strategy of expanding through acquisitions. The acquisitions of these businesses have allowed the Company to increase the scale at which it operates, which in turn affords the Company the ability to increase its operating leverage, extend its network reach, and broaden its customer base.

The accompanying condensed consolidated financial statements include the operations of the acquired entities from their respective acquisition dates.

Acquisitions Completed During Fiscal 2017

Santa Clara Data Center Acquisition

On October 3, 2016, the Company acquired a data center in Santa Clara, California (the “Santa Clara Data Center”), for net purchase consideration of $12.8 million. The net purchase consideration, which was valued using a discounted flow method, will be made in ten quarterly payments of $1.3 million beginning in the December 2016 quarter. As of December 31, 2016, the remaining cash consideration to be paid was $11.5 million. The acquisition was considered an asset purchase for tax purposes.

The Santa Clara Data Center, located at 5101 Lafayette Street, includes 26,900 total square feet and three megawatts (MW) of critical power. The facility also includes high-efficiency power and cooling infrastructure, seismic reinforcement and proximity to Zayo’s long haul dark fiber routes between San Francisco and Los Angeles.

Acquisitions Completed During Fiscal 2016

Clearview

On April 1, 2016, the Company acquired 100% of the equity interest in Clearview International, LLC (“Clearview”), a Texas based colocation and cloud infrastructure services provider for cash consideration of $18.3 million, subject to certain post-closing adjustments. $1.1 million of the purchase consideration is currently held in escrow pending the expiration of the indemnification adjustment period. The acquisition was funded with cash on hand and was considered an asset purchase for tax purposes.

The acquisition consisted of two Texas data centers. The data centers, located at 6606 LBJ Freeway in Dallas, Texas and 700 Austin Avenue in Waco, Texas, added approximately 30,000 square feet of colocation space, as well as a set of hybrid cloud infrastructure services that complement the Company’s global cloud capabilities.   

Allstream

On January 15, 2016, the Company acquired 100% of the equity interest in Allstream, Inc. and Allstream Fiber U.S. Inc. (together “Allstream”) from Manitoba Telecom Services Inc. (“MTS”) for cash consideration of CAD $422.9 million (or $297.6 million), net of cash acquired, subject to certain post-closing adjustments. The consideration paid is net of $29.6 million of working capital and other liabilities assumed by the Company in the acquisition. The acquisition was funded with Term Loan Proceeds (as defined in Note 5 – Long-Term Debt). The acquisition was considered a stock purchase for tax purposes.

The acquisition added more than 18,000 route miles to the Company’s fiber network, including 12,500 miles of long-haul fiber connecting all major Canadian markets and 5,500 route miles of metro fiber network connecting approximately 3,300 on-net buildings concentrated in Canada’s top five metropolitan markets.

As part of the Allstream acquisition, MTS agreed to retain Allstream’s former defined benefit pension obligations, and related pension plan assets, of retirees and other former employees of Allstream and also agreed to reimburse Allstream for certain solvency funding payments related to the pension obligations of active Allstream employees as of January 15, 2016.  MTS will transfer assets from Allstream’s former defined benefit pension plans related to pre-closing service obligations for active employees to new Allstream defined benefit pension plans created by the Company, subject to regulatory approval. In addition, if the pre-closing benefit obligation for the January 15, 2016 active employees exceeds the fair value of assets transferred to the new Allstream pension plans, MTS agreed to fund the funding deficiency at the later of the asset transfer date or the date at which it is determined that no further solvency deficit exists. Any required funding of the pension benefit obligation subsequent to January 15, 2016, will be the responsibility of the Company. The amount of the funding deficiency was not material to the financial statements as of December 31, 2016.

Also as part of the Allstream acquisition, the Company assumed the liabilities related to Allstream’s other non-pension unfunded post-retirement benefits plans. The liability assumed on January 15, 2016 was approximately $8.3

million. The balance of this liability as of December 31, 2016 was approximately $12.9 million. This liability is currently included in “Other long-term liabilities” on the consolidated balance sheet.

Viatel

On December 31, 2015, the Company completed the acquisition of a 100% interest in Viatel Infrastructure Europe Ltd., Viatel (UK) Limited, Viatel France SAS, Viatel Deutschland GmbH and Viatel Nederland BV (collectively, “Viatel”) for cash consideration of €92.9 million (or $101.2 million), net of cash acquired. The acquisition was funded with cash on hand. The acquisition was considered a stock purchase for tax purposes. During the six months ended December 31, 2016, the Company received a refund of the purchase price from escrow of $1.5 million. The refund is reflected as a cash inflow from investing activities on the condensed consolidated statement of cash flows for the six months ended December 31, 2016 within the Other caption.

Dallas Data Center Acquisition (“Dallas Data Center”)

On December 31, 2015, the Company acquired a 36,000 square foot data center located in Dallas, Texas for cash consideration of $16.6 million. The acquisition was funded with cash on hand and was considered an asset purchase for tax purposes.

Acquisition Method Accounting Estimates

The Company initially recognizes the assets and liabilities acquired from the aforementioned acquisitions based on its preliminary estimates of their acquisition date fair values. As additional information becomes known concerning the acquired assets and assumed liabilities, management may make adjustments to the opening balance sheet of the acquired company up to the end of the measurement period, which is no longer than a one year period following the acquisition date. The determination of the fair values of the acquired assets and liabilities assumed (and the related determination of estimated lives of depreciable tangible and identifiable intangible assets) requires significant judgment. As of December 31, 2016, the Company has not completed its fair value analysis and calculations in sufficient detail necessary to arrive at the final estimates of the fair value of certain working capital and non-working capital acquired assets and assumed liabilities, including the allocations to goodwill and intangible assets, deferred revenue and resulting deferred taxes related to its acquisitions of Clearview and the Santa Clara Data Center. All information presented with respect to certain working capital and non-working capital acquired assets and liabilities assumed as it relates to these acquisitions is preliminary and subject to revision pending the final fair value analysis.

The table below reflects the Company's estimates of the acquisition date fair values of the assets and liabilities assumed from its Fiscal 2017 acquisitions:

The table below reflects the Company's estimates of the acquisition date fair values of the assets and liabilities assumed from its Fiscal 2016 acquisitions:

The goodwill arising from the Company’s acquisitions results from synergies, anticipated incremental sales to the acquired company customer base and economies-of-scale expected from the acquisitions. The Company has allocated the goodwill to the reporting units (in existence on the respective acquisition dates) that were expected to benefit from the acquired goodwill. The allocation was determined based on the excess of the estimated fair value of the reporting unit over the estimated fair value of the individual assets acquired and liabilities assumed that were assigned to the reporting units. Note 3 - Goodwill, displays the allocation of the Company's acquired goodwill to each of its reporting units.

In the Company’s acquisitions, the Company acquired certain customer relationships. These relationships represent a valuable intangible asset, as the Company anticipates continued business from the acquired customer bases. The Company’s estimate of the fair value of the acquired customer relationships is based on a multi-period excess earnings valuation technique that utilizes Level 3 inputs.

Transaction Costs

Transaction costs include expenses associated with professional services (i.e., legal, accounting, regulatory, etc.) rendered in connection with signed and/or closed acquisitions or disposals, travel expense, severance expense incurred on the date of acquisition or disposal, and other direct expenses incurred that are associated with such acquisitions or disposals. The Company incurred transaction costs of $6.2 million and $9.2 million for the three and six months ended December 31, 2016, respectively, and $3.3 million for the three and six months ended December 31, 2015. Transaction costs have been included in selling, general and administrative expenses in the condensed consolidated statements of operations and in cash flows from operating activities in the condensed consolidated statements of cash flows during these periods. 

Pro-forma Financial Information

                The pro forma results presented below include the effects of the Company’s Fiscal 2017 and 2016 acquisitions as if the acquisitions occurred on July 1, 2015. The pro forma net loss for the periods ended December 31, 2017 and 2016 includes the additional depreciation and amortization resulting from the adjustments to the value of property and equipment and intangible assets resulting from purchase accounting and adjustment to amortized revenue during Fiscal 2017 and 2016 as a result of the acquisition date valuation of assumed deferred revenue. The pro forma results also include interest expense associated with debt used to fund the acquisitions. The pro forma results do not include any anticipated synergies or other expected benefits of the acquisitions. The unaudited pro forma financial information is not necessarily indicative of either future results of operations or results that might have been achieved had the acquisitions been consummated as of July 1, 2015.

(3) GOODWILL

The Company’s goodwill balance was $1,196.9 million and $1,214.5 million as of December 31, 2016 and June 30, 2016, respectively.

The Company’s reporting units are comprised of its strategic product groups (“SPGs”): Zayo Dark Fiber (“Dark Fiber”), Zayo Wavelength Services (“Waves”), Zayo SONET Services (“SONET”), Zayo Ethernet Services (“Ethernet”), Zayo IP Services (“IP”), Zayo Mobile Infrastructure Group (“MIG”), Zayo Colocation (“zColo"), Zayo Cloud Services (“Cloud”), Allstream business (“Zayo Canada”) and Other (primarily ZPS).

The following reflects the changes in the carrying amount of goodwill during the six months ended December 31, 2016:

(4) INTANGIBLE ASSETS

Identifiable intangible assets as of December 31, 2016 and June 30, 2016 were as follows:

(5) LONG-TERM DEBT

As of December 31, 2016 and June 30, 2016, long-term debt was as follows:

Term Loan Facility due 2021 and Revolving Credit Facility

On May 6, 2015, ZGL and Zayo Capital, Inc. (“Zayo Capital”) entered into an Amendment and Restatement Agreement whereby the Credit Agreement (the “Credit Agreement”) governing their senior secured term loan facility (the “Term Loan Facility”) and $450.0 million senior secured revolving credit facility (the “Revolver”) was amended and restated in its entirety. The amended and restated Credit Agreement extended the maturity date of the outstanding term loans under the Term Loan Facility to May 6, 2021. The interest rate margins applicable to the Term Loan Facility were decreased by 25 basis points to LIBOR plus 2.75% with a minimum LIBOR of 1.0%. In addition, the amended and restated Credit Agreement removed the fixed charge coverage ratio covenant and replaced such covenant with a

springing senior secured leverage ratio maintenance requirement applicable only to the Revolver, increased certain lien and debt baskets, and removed certain covenants related to collateral. The terms of the Term Loan Facility require the Company to make quarterly principal payments of $5.1 million plus an annual payment of up to 50% of excess cash flow, as determined in accordance with the Credit Agreement (no such payment was required during the three or six months ended December 31, 2016 or 2015).

The Revolver matures at the earliest of (i) April 17, 2020 and (ii) six months prior to the maturity date of the Term Loan Facility, subject to amendment thereof.  The Credit Agreement also allows for letter of credit commitments of up to $50.0 million.  The Revolver is subject to a fee per annum of 0.25% to 0.375% (based on ZGL’s current leverage ratio) of the weighted-average unused capacity, and the undrawn amount of outstanding letters of credit backed by the Revolver are subject to a 0.25% fee per annum. Outstanding letters of credit backed by the Revolver accrue interest at a rate ranging from LIBOR plus 2.0% to LIBOR plus 3.0% per annum based upon ZGL’s leverage ratio.

On January 15, 2016, ZGL and Zayo Capital entered into an Incremental Amendment (the “Amendment”) to the Credit Agreement. Under the terms of the Amendment, the Term Loan Facility was increased by $400.0 million (the “Incremental Term Loan”). The additional amounts borrowed bear interest at LIBOR plus 3.5% with a minimum LIBOR rate of 1.0%. The $400.0 million add-on was priced at 99.0% (the “Term Loan Proceeds”). The issue discount of $4.8 million on the Amendment is being accreted to interest expense over the term of the Term Loan Facility under the effective interest method. No other terms of the Credit Agreement were amended.  The Term Loan Proceeds were used to fund the Allstream acquisition (see Note 2 – Acquisitions) and for general corporate purposes.

On July 22, 2016, ZGL and Zayo Capital entered into a Repricing Amendment (the “Repricing Amendment”) to the Credit Agreement.  Per the terms of the Amendment, the Incremental Term Loan was repriced to bear interest at a rate of LIBOR plus 2.75%, with a minimum LIBOR rate of 1.0%, which represented a downward adjustment of 75 basis points. No other terms of the Credit Agreement were amended.

The weighted average interest rates (including margins) on the Term Loan Facility were approximately 3.75% and 3.9% at December 31, 2016 and June 30, 2016, respectively. Interest rates on the Revolver as of December 31, 2016 and June 30, 2016 were approximately 3.8% and 3.4%, respectively.

As of December 31, 2016, no amounts were outstanding under the Revolver. Standby letters of credit were outstanding in the amount of $7.3 million as of December 31, 2016, leaving $442.7 million available under the Revolver.

6.00% Senior Unsecured Notes Due 2023 and 6.375% Senior Unsecured Notes due 2025

On April 14, 2016, ZGL and Zayo Capital completed a private offering of $550.0 million aggregate principal amount of additional 2025 Unsecured Notes (the “New 2025 Notes”). The New 2025 Notes were an additional issuance of the existing 6.375% senior unsecured notes due in 2025 (the “2025 Unsecured Notes”) and were priced at 97.1%. The issue discount of $15.9 million of the New 2025 Notes is being accreted to interest expense over the term of the New 2025 Notes using the effective interest method. The net proceeds from the offering plus cash on hand (i) were used to redeem the then outstanding $325.6 million 10.125% senior unsecured notes due 2020, including the required $20.3 million make-whole premium and accrued interest, and (ii) were used to repay $196.0 million of borrowings under its secured Term Loan Facility. Per the terms of the Credit Agreement, the $196.0 million prepayment on the Term Loan Facility relieves the Company of its obligation to make quarterly principal payments on the Term Loan Facility until the cumulative amount of such relieved payments exceeds $196.0 million. The Company recorded a $2.1 million loss on extinguishment of debt associated with the write-off of unamortized debt discount on the Term Loan Facility accounted for as an extinguishment during the fourth quarter of Fiscal 2016. Following the offering of the New 2025 Notes, $900.0 million aggregate principal amount of the 2025 Unsecured Notes is outstanding.

Debt covenants

The indentures (the “Indentures”) governing the 6.00% senior unsecured notes due 2023 (the “2023 Unsecured Notes”) and the 2025 Unsecured Notes (collectively the “Notes”) contain covenants that, among other things, restrict the ability of ZGL and its subsidiaries to incur additional indebtedness and issue preferred stock; pay dividends or make other distributions with respect to any equity interests, make certain investments or other restricted payments, create liens, sell assets, incur restrictions on the ability of ZGL’s restricted subsidiaries to pay dividends or make other payments to ZGL, consolidate or merge with or into other companies or transfer all or substantially all of their assets, engage in transactions with affiliates, and enter into sale and leaseback transactions.  The terms of the Indentures include customary events of default.

The Credit Agreement contains customary events of default, including among others, non-payment of principal, interest, or other amounts when due, inaccuracy of representations and warranties, breach of covenants, cross default to certain other indebtedness, insolvency or inability to pay debts, bankruptcy, or a change of control. The Credit Agreement also contains a covenant, applicable only to the Revolver, that ZGL maintain a senior secured leverage ratio below 5.25:1.00 at any time when the aggregate principal amount of loans outstanding under the Revolver is greater than 35% of the commitments under the Revolver. The Credit Agreement also requires ZGL and its subsidiaries to comply with customary affirmative and negative covenants, including covenants restricting the ability of ZGL and its subsidiaries, subject to specified exceptions, to incur additional indebtedness, make additional guaranties, incur additional liens on assets, or dispose of assets, pay dividends, or make other distributions, voluntarily prepay certain other indebtedness, enter into transactions with affiliated persons, make investments and amend the terms of certain other indebtedness.

The Indentures limit any increase in ZGL’s secured indebtedness (other than certain forms of secured indebtedness expressly permitted under such indentures) to a pro forma secured debt ratio of 4.50 times ZGL’s previous quarter’s annualized modified EBITDA (as defined in the indentures), and limit ZGL’s incurrence of additional indebtedness to a total indebtedness ratio of 6.00 times the previous quarter’s annualized modified EBITDA.

The Company was in compliance with all covenants associated with its debt agreements as of December 31, 2016.

Guarantees

The Notes are fully and unconditionally guaranteed, jointly and severally, on a senior unsecured basis by all of ZGL’s current and future domestic restricted subsidiaries. The Notes were co-issued with Zayo Capital, which does not have independent assets or operations.

Debt issuance costs

In connection with the Credit Agreement (and subsequent amendments thereto), and the various Notes offerings, the Company incurred debt issuance costs of $90.1 million (net of extinguishments). These costs are being amortized to interest expense over the respective terms of the underlying debt instruments using the effective interest method, unless extinguished earlier, at which time the related unamortized costs are to be immediately expensed.

Unamortized debt issuance costs of $11.4 million associated with the Company’s previous indebtedness were recorded as part of the loss on extinguishment of debt during the fourth quarter of Fiscal 2016. 

The balance of debt issuance costs as of December 31, 2016 and June 30, 2016 was $49.9 million and $53.8 million, net of accumulated amortization of $40.2 million and $35.8 million, respectively. The amortization of debt issuance costs is included on the condensed consolidated statements of cash flows within the caption “Non-cash interest

expense” along with the amortization or accretion of the premium and discount on the Company’s indebtedness and changes in the fair value of the Company’s interest rate derivatives.  Interest expense associated with the amortization of debt issuance costs was $2.2 million and $4.4 million for the three and six months ended December 31, 2016, respectively, and $2.5 million and $5.0 million for the three and six months ended December 31, 2015, respectively.

Debt issuance costs are presented in the condensed consolidated balance sheets as a reduction to “Long-term debt, non-current”.

Interest rate derivatives

On August 13, 2012, the Company entered into forward-starting interest rate swap agreements with an aggregate notional value of $750.0 million, a maturity date of June 30, 2017, and a start date of June 30, 2013. There were no up-front fees for these agreements. The contract states that the Company shall pay a 1.67% fixed rate of interest for the term of the agreement beginning on the start date. The counter-party will pay to the Company the greater of actual LIBOR or 1.25%. The Company entered in to the forward-starting swap arrangements to reduce the risk of increased interest costs associated with potential changes in LIBOR rates.

Changes in the fair value of interest rate swaps are recorded in interest expense in the condensed consolidated statements of operations for the applicable period. The fair value of the interest rate swaps of $1.5 million and $3.0 million are included in “Other long term liabilities” in the Company’s condensed consolidated balance sheets as of December 31, 2016 and June 30, 2016, respectively. During the three and six months ended December 31, 2016, $0.8 million and $1.5 million, respectively, was recorded as a decrease in interest expense for the change in fair value of the interest rate swaps. During the three and six months ended December 31, 2015, $1.0 million and $0.6 million, respectively, was recorded as a decrease in interest expense for the change in fair value of the interest rate swaps.

(6) INCOME TAXES

A reconciliation of the actual income tax provision and the tax computed by applying the U.S. federal rate to the earnings before income taxes during the three and six month periods ended December 31, 2016 and 2015 is as follows:

 The interim period effective tax rate is driven from year-to-date and anticipated pre-tax book income for the full fiscal year adjusted for anticipated items that are deductible/non-deductible for tax purposes only (i.e., permanent items). Additionally, the tax expense or benefit related to discrete permanent differences in an interim period are recorded in the period they occur.

The interim effective tax rate for the three and six months ended December 31, 2016 was positively impacted by foreign tax expense not recognized due to full valuation allowances recorded on certain foreign entities. Additionally, the excess tax benefit for the greater allowable deduction for stock-based compensation for tax purposes compared to the book expense related to the Company’s restricted stock unit plans (See Note 8 – Stock-based Compensation)  was recorded as a discrete permanent benefit during the period.

The interim effective tax rate continues to be negatively impacted by stock-based compensation expense related to the common units of Communications Infrastructure Investments, LLC (“CII”). This quarter ended December 31, 2016 is expected to be the final period for stock-based compensation expense associated with the common units of CII.

The Company files income tax returns in various federal, state, and local jurisdictions including the United States, United Kingdom and Canada. In the normal course of business, the company is subject to examination by taxing authorities throughout the world. With few exceptions, the company is no longer subject to income tax examinations by tax authorities in major tax jurisdictions for years before 2012.

(7) EQUITY

During the six months ended December 31, 2016, the Company recorded a $60.2 million increase in additional paid-in capital associated with stock-based compensation expense related to the Company’s equity classified stock-based compensation awards (See Note 8 –Stock-based Compensation).

(8) STOCK-BASED COMPENSATION

The following tables summarize the Company’s stock-based compensation expense for liability and equity classified awards included in the condensed consolidated statements of operations.