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HARMONIC INC.

For the period ended Jun 4, 2026. Filed Apr 24, 2026.

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About this filing

What shareholders are asked to vote on at a company's meeting. It is where to find what directors and top executives are paid, and who owns the most shares.

Jun 4, 2026 · Filed Apr 24, 2026

HLIT$9.51+2.1%Stored close · as of Nov 6, 2026
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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

Filed by the Registrant ☒Filed by a Party other than the Registrant ☐

Check the appropriate box:

☐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

HARMONIC INC.

(Name of Registrant as Specified In Its Charter)

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

Payment of Filing Fee (Check all boxes that apply):

☒No fee required.
☐Fee paid previously with preliminary materials.
☐Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

2025OVERVIEW

AT-A-GLANCE – CONTINUING OPERATIONS

Revolutionizing Broadband Networks

YEAR-END 2025 – CONTINUING OPERATIONS

Performance Highlights

Customer⬤ Strong overall Fiber growth in FY25⬤ Growing footprint of wins across both Telco and Cable⬤ Q4 33% YoY Rest-of-World revenue growth representing 41% of total revenue
Technology⬤ Unified D4.0 Nodes shipments ramping in Q1’26⬤ Expanding Fiber portfolio with new Combo pluggable OLT⬤ Introduced new subscriber experience detection, mitigating support calls before they happen
Financial⬤ $347M in Q4 bookings (3.5 book-to-bill)⬤ Record backlog and deferred revenue, with current portion increasing 110% over prior year

NOTICE OF ANNUAL MEETING OF STOCKHOLDERS

To Be Held at 9:00 A.M. Pacific Time on Thursday, June 4, 2026

Dear Stockholders of Harmonic Inc:

You are cordially invited to attend the 2026 annual meeting of stockholders (the “Annual Meeting”) of Harmonic Inc., a Delaware corporation (the “Company”), which will be held on Thursday, June 4, 2026, at 9:00 a.m., Pacific Time. The Annual Meeting will be a virtual meeting held over the Internet. You will be able to attend the Annual Meeting, vote your shares electronically and submit your questions during the live webcast of the meeting by visitingwww.virtualshareholdermeeting.com/HLIT2026 and entering your 16-digit control number located on your proxy card. The meeting will address the following items of business:

1.To elect seven (7) directors to serve until the earlier of the 2027 annual meeting of stockholders or until their successors are elected and qualified or until their earlier resignation or removal;
2.To hold an advisory vote to approve named executive officer compensation;
3.To hold an advisory vote on the frequency of future stockholder advisory votes on named executive officer compensation;
4.To approve an amendment to the Harmonic Inc. 2025 Equity Incentive Plan to increase the number of shares of common stock reserved for issuance thereunder by 7,000,000 shares;
5.To ratify the appointment of Ernst & Young LLP as the independent registered public accounting firm of the Company for its fiscal year ending December 31, 2026; and
6.To transact such other matters as may properly come before the Annual Meeting or any adjournment, postponement or other delay thereof.

The foregoing items of business are more fully described in the Proxy Statement accompanying this notice. All stockholders of record at the close of business on Wednesday, April 8, 2026, are entitled to notice of and to vote at the Annual Meeting and any adjournment or postponement thereof.

On or about April 24, 2026, we expect to send to our stockholders a Notice of Internet Availability of Proxy Materials containing instructions on how to access our proxy materials. Unless you have previously requested to receive our proxy materials in paper form or by email, you will receive a Notice of Internet Availability of Proxy Materials. Stockholders who continue to receive paper copies of proxy materials may elect to receive future proxy materials via electronic delivery by enrolling atwww.proxyvote.com.

By Order of the Board of Directors,

Timothy C. Chu

Corporate Secretary

San Jose, California

April 24, 2026

How to Vote

By Telephone:

By Internet:

By Mail:

By Scanning:

Your Vote is Important.

Whether or not you plan to attend the virtual meeting we urge you to submit your vote via the Internet, telephone or mail as soon as possible to ensure your shares are represented. Please refer to your proxy card for additional instructions on voting via the Internet or by telephone. Even if you have voted by proxy, you may still vote in person by attending the virtual meeting.

PROXY STATEMENTTABLE OF CONTENTS

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.