EXTREME NETWORKS INC

If you complete and submit your proxy card or the voting instruction card provided by your broker, bank or other nominee, the persons named as proxies will follow your instructions. If you do not direct how to vote on a proposal, the persons named as proxies will vote as the Board recommends on that proposal. Depending on how you hold your shares, you may vote in one of the following ways:

Stockholders of Record -You may vote by proxy, over the Internet or by telephone. Please follow the instructions provided in the Notice of Internet Availability of Proxy Materials or on the proxy card you received. You may also vote online at the Annual Meeting by attending the Annual Meeting online. To attend the Annual Meeting online, you must register online atwww.proxyvote.com, or during the meeting athttp://www.virtualshareholdermeeting.com/EXTR2024, with the 16-digit code printed in the box marked by the arrow on your proxy materials and follow the on-screen instructions.

Beneficial Stockholders- Your broker, bank or other nominee will provide you with a voting instruction card for your use in instructing it how to vote your shares. Since you are not the stockholder of record, you may not vote your shares online at the virtual Annual Meeting unless you request and obtain a valid proxy from your broker, bank or other nominee, or by requesting one onwww.proxyvote.com.

Votes submitted by telephone or via the Internet must be received by 11:59 p.m., Eastern Time, on November 13, 2024. Submitting your proxy by telephone or via the Internet will not affect your right to vote in person should you decide to attend the Annual Meeting.

If you are a stockholder of record, you may revoke your proxy and change your vote at any time before the polls close by returning a later-dated proxy card, by voting again by Internet or telephone as more fully detailed on your proxy card, or by delivering written instructions to the Corporate Secretary at the Company’s headquarters before the Annual Meeting. Attendance at the virtual Annual Meeting will not cause your previously voted proxy to be revoked unless you specifically request revocation or vote online at the virtual Annual Meeting. If your shares are held by a broker, bank or other nominee, you may change your vote by submitting new voting instructions to your broker, bank or other nominee in accordance with the nominees directions, or, if you have obtained a legal proxy from your broker, bank or other nominee giving you the right to vote your shares, by attending the Annual Meeting and voting online.

If you return a signed and dated proxy card without marking any voting selections, your shares will be voted as follows:

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“FOR” the election of each nominee for director;

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“FOR” the approval of our named executive officers’ compensation;

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“FOR” the ratification of the appointment of Grant Thornton LLP as our independent auditors for our fiscal year ending June 30, 2025; and

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“FOR” the approval of the amendment and restatement of our 2013 Equity Incentive Plan.

If any other matter is properly presented at the Annual Meeting, your proxyholder (one of the individuals named on your proxy card) will vote your shares in his or her discretion.