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| x      | ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |
|   | For the fiscal year ended June 30, 2014 |

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| o      | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |
|   | For the transition period from              to             . |

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| Delaware                                                      |   | 77-0430270 |
| (State or other jurisdiction ofincorporation or organization) |   | (I.R.S. EmployerIdentification No.) |
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| 145 Rio RoblesSan Jose, California                            |   | 95134 |
| (Address of principal executive offices)                      |   | (Zip Code) |

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| Large Accelerated Filer  o |   | Accelerated Filer  x |
| Non-Accelerated Filer  o        |   | Smaller reporting company  o |

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Table of Contents

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|   | EXTREME NETWORKS, INC.(Registrant) |
|   |   |   |
|   | By: | /s/    Kenneth Arola |
|   |   | Kenneth Arola |
|   |   | Senior Vice President, Chief Financial Officer, and Chief Accounting Officer |
|   |   | June 2, 2015 |

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|---------------------------------------------------------------------------------------------------|
|                                                                                                   |  |  |
| /s/    ED MEYERCORD                                                      |   | /s/    CHARLES W. BERGER         |
| Ed Meyercord                                                                                      |   | Charles W. Berger |
| Chairman of the Board                                                                             |   | President and Chief Executive Officer, Director |
| August 27, 2014                                                                                   |   | (Principal Executive Officer) |
|                                                                                              |   | August 27, 2014 |
|                                                                                              |   |   |
| /s/    KENNETH AROLA                                 |   | /s/    MAURY AUSTIN         |
| Kenneth Arola                                                                                     |   | Maury Austin |
| Senior Vice President, Chief Financial Officer, and Chief Accounting Officer                      |   | Director |
| (Principal Accounting Officer)                                                                    |   | August 27, 2014 |
| June 2, 2015                                                                                 |   |   |
|                                                                                              |   |   |
| /s/    CHARLES CARINALLI         |   | /s/    RANDI PAIKOFF FAIGIN         |
| Charles Carinalli                                                                                 |   | Randi Paikoff Faigin |
| Director                                                                                          |   | Director |
| August 27, 2014                                                                                   |   | August 28, 2014 |
|                                                                                              |   |   |
| /s/    ED KENNEDY                |   | /s/    JOHN KISPERT         |
| Ed Kennedy                                                                                        |   | John Kispert |
| Director                                                                                          |   | Director |
| August 27, 2014                                                                                   |   | August 28, 2014 |
|                                                                                              |   |   |
| /s/    JOHN C. SHOEMAKER         |   |   |
| John C. Shoemaker                                                                                 |   |   |
| Director                                                                                          |   |   |
| August 27, 2014                                                                                   |   |   |
|                                                                                              |   |   |

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Table of Contents

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|                         |  |  |  |  |  |  |  |  |  |  |
| ExhibitNumber           |   |   |   | Incorporated by Reference |   | FiledHerewith |
| Description of Document |   | Form |   | FilingDate |   | Number |   |
| 2.1                     |   | Stock Purchase Agreement, dated September 12, 2013 between Enterprise Network Holdings, Inc. and Extreme Networks, Inc. |   | 8-K |   | 9/13/2013 |   | 2.1 |   |   |
| 3.1                     |   | Amended and Restated Certificate of Incorporation of Extreme Networks, Inc. |   | 8-K |   | 12/17/2010 |   | 3.2 |   |   |
| 3.2                     |   | Amended and Restated Bylaws of Extreme Networks, Inc. |   | 8-K |   | 3/31/2011 |   | 3.1 |   |   |
| 3.3                     |   | Certificate of Designation, Preferences and Rights of the Terms of the Series A Preferred Stock |   | 10-K |   | 9/26/2001 |   | 3.7 |   |   |
| 4.1                     |   | Amended and Restated Rights Agreement dated April 26, 2012 between Extreme Networks, Inc. and Computershare Shareowner Services LLC. |   | 8-K |   | 4/30/2012 |   | 4.1 |   |   |
| 4.2                     |   | Amendment No. 2 to the Amended and Restated Rights Agreement effective April 30, 2014. |   | 8-K |   | 5/20/2014 |   | 4.1 |   |   |
| 10.1                    |   | Form of Indemnification Agreement for directors and officers. |   | 8-K |   | 10/24/2011 |   | 99.1 |   |   |
| 10.2*                   |   | Amended 1996 Stock Option Plan and forms of agreements thereunder. |   | S-1 |   | 2/5/1999 |   | 10.2 |   |   |
| 10.3*                   |   | 1999 Employee Stock Purchase Plan. |   | S-1 |   | 2/5/1999 |   | 10.3 |   |   |
| 10.4*                   |   | 2000 Nonstatutory Stock Option Plan. |   | 10-K |   | 9/24/2000 |   | 10.7 |   |   |
| 10.5*                   |   | 2001 Nonstatutory Stock Option Plan. |   | Schedule TO |   | 10/31/2001 |   | (d)(9) |   |   |
| 10.6*                   |   | Extreme Networks, Inc. 2005 Equity Incentive Plan. |   | 8-K |   | 10/23/2009 |   | 99.3 |   |   |
| 10.7*                   |   | Form of Restricted Stock Units Agreement Under the 2005 Equity Incentive Plan. |   | 10-Q |   | 11/7/2008 |   | 10.22 |   |   |
| 10.8*                   |   | Offer of Employment Letter Dated July 29, 2010 from Extreme Networks, Inc. to Oscar Rodriguez. |   | 10-K |   | 8/20/2010 |   | 10.32 |   |   |
| 10.9*                   |   | Offer Letter Agreement, dated September 13, 2011, between Extreme Networks, Inc. and Margaret Echerd. |   | 8-K |   | 9/15/2011 |   | 10.3 |   |   |
| 10.10*                  |   | Offer Letter Agreement, executed May 18, 2012, between Extreme Networks, Inc. and John Kurtzweil. |   | 8-K |   | 5/22/2012 |   | 10.2 |   |   |
| 10.11                   |   | Lease, dated September 11, 2012, between Extreme Networks, Inc., and 3515-3585 Monroe Street, LLC. |   | 8-K |   | 9/18/2012 |   | 10.1 |   |   |
| 10.12*                  |   | Amendment to Offer of Employment, dated September 13, 2012, between Extreme Networks, Inc., and Oscar Rodriguez. |   | 8-K |   | 9/18/2012 |   | 10.2 |   |   |
| 10.13*                  |   | Consulting Agreement, dated September 20, 2012, between Extreme Networks, Inc. and Diane Honda. |   | 8-K |   | 9/21/2012 |   | 10.1 |   |   |
| 10.14*                  |   | Offer Letter Agreement, executed September 7, 2012, between Extreme Networks, Inc. and Nancy Shemwell. |   | 8-K |   | 9/24/2012 |   | 10.1 |   |   |
| 10.15                   |   | Lease Agreement by and between RDU Center III LLC and Extreme Networks, Inc. dated October 15, 2012. |   | 8-K |   | 10/19/2012 |   | 10.1 |   |   |
| 10.16                   |   | First Amendment to Lease Agreement by and between RDU Center III LLC and Extreme Networks, Inc. dated December 31, 2012. |   | 8-K |   | 1/7/2013 |   | 10.1 |   |   |
| 10.17                   |   | Office Space Lease Agreement by and between W3 Ridge Rio Robles Property LLC and Extreme Networks, Inc., dated December 31, 2012. |   | 8-K |   | 1/7/2013 |   | 10.2 |   |   |

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Table of Contents

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| ExhibitNumber           |   |   |   | Incorporated by Reference |   | FiledHerewith |
| Description of Document |   | Form |   | FilingDate |   | Number |   |
| 10.18*                  |   | Offer Letter, dated April 25, 2013, between Extreme Networks, Inc. and Charles Berger. |   | 8-K |   | 5/1/2013 |   | 10.1 |   |   |
| 10.19*                  |   | Release of Claims, dated April 28, 2013, between Extreme Networks, Inc. and Oscar Rodriguez. |   | 8-K |   | 5/1/2013 |   | 10.2 |   |   |
| 10.20*                  |   | Offer Letter, dated July 19, 2013, between Extreme Networks, Inc. and Ed Carney. |   | 8-K |   | 7/29/2013 |   | 10.1 |   |   |
| 10.21*                  |   | Release of Claims, dated August 20, 2013, between Extreme Networks, Inc. and David Ginsburg. |   | 8-K |   | 8/23/2013 |   | 10.1 |   |   |
| 10.22                   |   | Credit Agreement, dated as of October 31, 2013, among Extreme Networks Inc., as borrower, Silicon Valley Bank, as administrative agent and collateral agent, Bank of America, N.A. and PNC Bank, National Association as co-syndication agents and the lenders party thereto. |   | 8-K |   | 11/1/2013 |   | 10.1 |   |   |
| 10.23*                  |   | Offer Letter executed November 1, 2013, between Extreme Networks, Inc. and Chris Crowell. |   | 8-K |   | 11/7/2013 |   | 10.1 |   |   |
| 10.24*                  |   | Separation Agreement and General Release of Claims executed November 1, 2013 between Extreme Networks, Inc. and Nancy Shemwell. |   | 8-K |   | 11/7/2013 |   | 10.2 |   |   |
| 10.25                   |   | Enterasys Networks, Inc. 2013 Stock Plan. |   | S-8 |   | 11/22/2013 |   | 99.1 |   |   |
| 10.26                   |   | Extreme Networks, Inc. 2013 Stock Plan. |   | S-8 |   | 11/22/2013 |   | 99.2 |   |   |
| 10.27                   |   | Extreme Networks, Inc. Executive Change in Control Severance Plan Amended and Restated February 12, 2014. |   | 10-Q |   | 5/7/2014 |   | 10.1 |   |   |
| 10.28                   |   | Agreement to Participate in the Extreme Networks, Inc. Executive Change in Control Severance Plan as Amended and Restated February 12, 2014. |   | 10-Q |   | 5/7/2014 |   | 10.2 |   |   |
| 10.29*                  |   | Offer Letter executed May 2, 2014, between Extreme Networks, Inc. and Ken Arola. |   | 8-K |   | 5/8/2014 |   | 10.1 |   |   |
| 10.30*                  |   | Separation and Transition Agreement and General Release of Claims, dated May 19, 2014, by and between Extreme Networks, Inc. and John Kurtzweil. |   | 8-K |   | 5/23/2014 |   | 10.1 |   |   |
| 10.31*                  |   | Separation Agreement and General Release of Claims, dated May 21, 2014, by and between Extreme Networks, Inc. and Christopher Crowell. |   | 8-K |   | 5/23/2014 |   | 10.2 |   |   |
| 21.1                    |   | Subsidiaries of Registrant. |   | 10-K |   | 9/15/2014 |   | 21.1 |   |   |
| 23.1                    |   | Consent of KPMG LLP, Independent Registered Public Accounting Firm. |   | 10-K |   | 9/15/2014 |   | 23.1 |   |   |
| 24.1                    |   | Power of Attorney (see the signature page of this Form 10-K/A). |   |   |   |   |   |   |   | X |
| 31.1                    |   | Section 302 Certification of Chief Executive Officer. |   |   |   |   |   |   |   | X |
| 31.2                    |   | Section 302 Certification of Chief Financial Officer. |   |   |   |   |   |   |   | X |
| 32.1                    |   | Section 906 Certification of Chief Executive Officer. |   |   |   |   |   |   |   | X |
| 32.2                    |   | Section 906 Certification of Chief Financial Officer. |   |   |   |   |   |   |   | X |
| 101.INS                 |   | XBRL Instance Document.** |   | 10-K |   | 9/15/2014 |   |   |   |   |
| 101.SCH                 |   | XBRL Taxonomy Extension Schema Document.** |   | 10-K |   | 9/15/2014 |   |   |   |   |
| 101.CAL                 |   | XBRL Taxonomy Extension Calculation Linkbase Document.** |   | 10-K |   | 9/15/2014 |   |   |   |   |
| 101.LAB                 |   | XBRL Taxonomy Extension Label Linkbase Document.** |   | 10-K |   | 9/15/2014 |   |   |   |   |
| 101.PRE                 |   | XBRL Taxonomy Extension Presentation Linkbase Document.** |   | 10-K |   | 9/15/2014 |   |   |   |   |

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Table of Contents

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|                         |  |  |  |  |  |  |  |  |  |  |
| ExhibitNumber           |   |   |   | Incorporated by Reference |   | FiledHerewith |
| Description of Document |   | Form |   | FilingDate |   | Number |   |
| 101.DEF                 |   | XBRL Taxonomy Extension Definition Linkbase Document** |   | 10-K |   | 9/15/2014 |   |   |   |   |

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|  * | Indicates management or board of directors contract or compensatory plan or arrangement. |

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| ** | Pursuant to Rule 406T of Regulation S-T, these interactive data files are furnished and not filed or a part of a registration statement or prospectus for purposes of sections 11 or 12 of the Securities Act of 1933, as amended; are deemed not filed for purposes of section 18 of the Securities Exchange Act of 1934, as amended; and otherwise are not subject to liability under these sections. |