CALX Calix Inc

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

(RULE 14A-101)

INFORMATION REQUIRED IN PROXY STATEMENT

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No.     )

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Check the appropriate box:

CALIX, 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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Calix Your Vote Counts! CALIX, INC. 2022 Annual Meeting Vote by May 11, 2022 11:59 PM ET CALIX, INC. 2777 ORCHARD PARKWAY SAN JOSE, CA 95134 You invested in CALIX, 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 material for the stockholder meeting to be held on May 12, 2022. Get informed before you vote View the Notice & Proxy Statement, Annual Report on Form 10-K online OR you can receive a free paper or email copy of the material(s) by requesting prior to April 28, 2022. 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 sendmaterial@proxyvote.com. 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* May 12, 2022 10:45 AM PDT Virtually at: www.virtualshareholdermeeting.com/CALX22 *Please check the meeting materials for any special requirements for meeting attendance.

Vote at www.ProxyVote.com THIS 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 1. Election of Directors Nominees: 01) Christopher Bowick 03) Michael Matthews 02) Kira Makagon 04) Carl Russo 2. Approval of the Amended and Restated 2019 Equity Incentive Award Plan. 3. Approval of the Amended and Restated Employee Stock Purchase Plan. 4. Approval of the Amended and Restated 2017 Nonqualified Employee Stock Purchase Plan. 5. Approval, on a non-binding, advisory basis, of the compensation of Calix’s named executive officers. 6. Ratification of the selection of KPMG LLP as Calix’s independent registered public accounting firm for the fiscal year ending December 31, 2022. NOTE: Such other business as may properly come before the meeting or any adjournment thereof. Board Recommends For For For For For For Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click “Sign up for E-delivery”.