UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT PURSUANT

TO SECTION 13 OR 15 (d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported): March 31, 2016

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)

Zayo Group, LLC

(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)

Check the appropriate box below if the Form 8-K is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 8.01                                           Other Events

On March 31, 2016, Zayo Group, LLC (“ZGL”), a subsidiary of Zayo Group Holdings, Inc., issued a press release announcing that ZGL and Zayo Capital, Inc. (together, the “Issuers”) priced the previously announced private offering of their 6.375% Senior Notes due 2025 through an add-on to their existing issue, and upsized the offering from $350 million to $550 million aggregate principal amount.  The Issuers intend to use the net proceeds from this offering plus cash on hand to (i) redeem their approximately $326 million of remaining 10.125% senior notes due 2020, including the required make-whole premium and accrued interest, and (ii) repay approximately $197 million of borrowings under their secured term loan facility.

A copy of the press release is filed as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated by reference in this Item 8.01.

This communication does not constitute an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful.

Item 9.01. Financial Statements and Exhibits.

Portions of this report may constitute “forward-looking statements” as defined by federal law. Although the registrants believe any such statements are based on reasonable assumptions, there is no assurance that actual outcomes will not be materially different. Additional information about issues that could lead to material changes in the registrants’ performance is contained in their respective filings with the Securities and Exchange Commission. The registrants undertake no obligation to publicly update or revise any forward-looking statements to reflect events or circumstances after the date hereof.

Investors should take into consideration those risks and uncertainties discussed in each registrant’s Annual Report on Form 10-K for the year ended June 30, 2015 and each registrant’s Quarterly Reports on Form 10-Q for the quarters ended September 30, 2015 and December 31, 2015, including but not limited to those under the heading “Risk Factors” to the extent each heading is included therein.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

DATED:   April 6, 2016

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

DATED:   April 6, 2016

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EXHIBIT INDEX

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