Form DEFA14A Netskope Inc

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 14A

PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE
SECURITIES EXCHANGE ACT OF 1934

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Filed by a Party other than the Registrant ☐

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☐ Preliminary Proxy Statement

☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

☐ Definitive Proxy Statement

☒ Definitive Additional Materials

☐ Soliciting Material Pursuant to §240.14a-12

NETSKOPE, INC.

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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Your Vote Counts! NETSKOPE, INC. 2026 Annual Meeting Vote by July 6, 2026 11:59 PM ET NETSKOPE, INC. 2445 AUGUSTINE DRIVE, SUITE 301 SANTA CLARA, CA 95054 ATTN: LEGAL/PROXY RETURNS T00093-P53113 You invested in NETSKOPE, INC. and it’s time to vote! You have the right to vote on proposals being presented at the Annual Meeting. This is an important notice regarding the availability of proxy materials for the stockholder meeting to be held on July 7, 2026. Get informed before you vote View the Notice and Proxy Statement and Form 10K online OR you can receive a free paper or email copy of the material(s) by requesting prior to June 23, 2026. If you would like to request a copy of the material(s) for this and/or future stockholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to [email protected]. If sending an email, please include your control number (indicated below) in the subject line. Unless requested, you will not otherwise receive a paper or email copy. For complete information and to vote, visit www.ProxyVote.com Control # Smartphone users Point your camera here and vote without entering a control number Vote Virtually at the Meeting* July 7, 2026 11:00 a.m. Pacific Time Virtually at: www.virtualshareholdermeeting.com/NTSK2026*Please check the meeting materials for any special requirements for meeting attendance.

Vote at www.ProxyVote.comTHIS IS NOT A VOTABLE BALLOT This is an overview of the proposals being presented at the upcoming stockholder meeting. Please follow the instructions on the reverse side to vote these important matters. Voting Items Board Recommends 1. Election of Class I Directors For 01) Sanjay Beri 02) Arif Janmohamed 2. Ratification of the appointment of KPMG LLP as our independent registered public accounting firm for the fiscal year ending January 31, 2027. For NOTE: Such other business as may properly come before the meeting or any adjournment thereof. Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click “Delivery Settings”. T00094-P53113