Calix to Post Third Quarter 2021 Stockholder Letter with Results on October 25th

Calix, Inc. (NYSE:CALX) today announced that the company will post its third quarter 2021 stockholder letter with results for the period ending October 2, 2021 on the Calix Investor Relations website at http://investor-relations.calix.com/ on Monday, October 25^th at 2:00 p.m. Pacific Time (5:00 p.m. Eastern Time). The release of the stockholder letter will be announced over newswire with a link to the letter to stockholders available on the investor relations section of calix.com.

Calix will host a conference call to discuss these results the following morning on Tuesday, October 26^th at 5:30 a.m. Pacific Time (8:30 a.m. Eastern Time).

Interested parties can listen to a live webcast of the conference call by visiting the Calix Investor Relations website at http://investor-relations.calix.com/. The conference call is also available via teleconference by dialing (877) 407-4019 or international (201) 689-8337 with conference ID# 13723037 or participants can 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 replay of the conference call will also be available at http://investor-relations.calix.com/ following the completion of the call. The call will be archived at http://investor-relations.calix.com/.

About Calix

Calix, Inc. (NYSE:CALX) - Calix cloud and software platforms enable service providers of all types and sizes to innovate and transform. Our customers utilize the real-time data and insights from Calix platforms to simplify their businesses and deliver experiences that excite their subscribers. The resulting growth in subscriber acquisition, loyalty and revenue creates more value for their businesses and communities. This is the Calix mission; to enable communications service providers of all sizes to simplify, excite and grow.

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