Calix, Inc. (NYSE:CALX) today announced that on Tuesday, April 21, 2026, after market close, the company will post on the Calix Investor Relations website its first quarter stockholder letter for the period ended March 28, 2026. The posting of the stockholder letter will be announced over the newswire with a link to the letter to stockholders available at https://investor-relations.calix.com/.

Calix will host a conference call to discuss these results the same evening at 2:00 p.m. Pacific Time / 5:00 p.m. Eastern Time. Interested parties may listen to a live webcast of the conference call by visiting the Events page of the Calix Investor Relations website. The live conference call will be available by dialing (877) 407-4019, or international (201) 689-8337, with conference ID#13759279. Participants may also click this link for instant telephone access to the event. The link will become active approximately 15 minutes prior to the start of the conference call. The conference call and webcast will include forward-looking information. A webcast replay of the conference call will be available following its completion and will be archived on the Calix Investor Relations website.

This timing reflects the proximity of Calix's Investor Day, which will be held the following day. As previously announced, the Company will host its Investor Day in-person for analysts and institutional investors on April 22, 2026 at the New York Stock Exchange in New York City. The presentation is scheduled to begin at 10:00 a.m. Eastern Time and will also be available virtually from the Events page of the Calix Investor Relations website. Members of Calix's executive leadership team plan to present information regarding the company's long-term strategy and financial outlook. For questions or to register your interest, please contact Calix Investor Relations at InvestorRelations@calix.com.

About Calix

Calix, Inc. (NYSE:CALX) – is an AI and cloud platform company that helps communication service providers (CSPs) transform into communication experience providers (CXPs) that deliver exceptional experiences to subscribers and communities. Through Calix One, the world's leading AI-native broadband platform, CXPs can securely activate agentic AI to acquire new subscribers, grow revenue from existing subscribers and build loyalty across residential, business and MDU markets.

Calix One uniquely integrates agentic functionality, cloud solutions and innovative managed services to simplify operations and turn network and subscriber data into actionable insights. CXPs can streamline service delivery and create personalized experiences delivered to an audience of one.

Built on more than 25 years of industry expertise, Calix One curates privacy-protected intelligence from millions of end-user devices to help CXPs optimize their business models, reduce operational complexity and accelerate time-to-market. More than 1,600 customers worldwide, from regional providers to global operators, rely on Calix solutions to compete more effectively and win in any market.

Category: Financial

View source version on businesswire.com: https://www.businesswire.com/news/home/20260330985210/en/

Investor Inquiries:

Nancy Fazioli

VP, Investor Relations

InvestorRelations@calix.com

(669) 308-3901

Calix to Post First Quarter Results and Host Earnings Call on April 21, 2026; Hosts Investor Day on April 22, 2026