Company: CALX
Filing Date: 2025-03-27
Form Type: DEF 14A
Source: 0001406666-25-000011
Chunk: 2

Company: CALIX, INC
Filing Date: 2025-03-27
Form: DEF 14A
Chunk 2
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 voting procedures described in the Notice to ensure that your vote is recorded. We strongly encourage you to vote by Internet or phone by following the instructions described in the Notice. If you have requested and received paper copies of proxy materials in lieu of the Notice, we still encourage you to vote by phone, but if you do not have access to a phone you may sign, date and return by mail the proxy card sent to you.

| By Order of the Board of Directors |
| /s/ Douglas McNitt                 |
| Douglas McNitt                     |
| Corporate Secretary                |

San Jose, California

March 27, 2025

The Notice of Annual Meeting, Proxy Statement and Form of Proxy are being distributed and made available on or about March 27, 2025.

### PROXY STATEMENT

#### FOR 2025 ANNUAL MEETING OF STOCKHOLDERS

### TABLE OF CONTENTS
| IMPORTANT NOTICE REGARDING THE AVAILABILITY OF PROXY MATERIALS FOR THE STOCKHOLDER MEETING TO BE HELD ON MAY8, 2025        |     |   1 |     |     |
|:---------------------------------------------------------------------------------------------------------------------------|:----|----:|:----|----:|
| QUESTIONS AND ANSWERS ABOUT THIS PROXY MATERIAL AND VOTING                                                                 |     |   2 |     |     |
| CORPORATE GOVERNANCE                                                                                                       |     |   7 |     |     |
| Leadership Structure of the Board                                                                                          |     |   7 |     |     |
| Board Independence                                                                                                         |     |   7 |     |     |
| Board Composition and Qualifications                                                                                       |     |   8 |     |     |
| Board Meetings and Committees                                                                                              |     |   9 |     |     |
| Annual Self-Assessment and Board Education                                                                                 |     |  13 |     |     |
| Board Oversight Over Risks                                                                                                 |     |  13 |     |     |
| Communications with the Board                                                                                              |     |  14 |     |     |
| SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT                                                             |     |  15 |     |     |
| PROPOSAL NO. 1—ELECTION OF DIRECTORS                                                                                       |     |  18 |     |     |
| Nominees for Election to a Three-Year Term Expiring at the 2028 Annual Meeting of Stockholders                             |     |  20 |     |     |
| Current Directors