Calix (CALX) SDConflict minerals disclosure

Exhibit 1.01

Conflict Minerals Report

Calix, Inc.

For the Year Ended December 31, 2022

This Conflict Minerals Report (“CMR”) is provided to comply with Rule 13p-1 of the Securities Exchange Act of 1934, as amended, for Calix, Inc. (“Calix”) for the calendar year ending December 31, 2022. Rule 13p-1, as implemented by the Securities and Exchange Commission (“SEC”), imposes reporting and disclosure requirements related to conflict minerals as directed by the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010. Rule 13p-1 applies to SEC registrants whose manufactured products contain conflict minerals which are necessary to the functionality or production of their products, other than conflict minerals sourced solely from recycled or scrap sources. Conflict minerals are defined as cassiterite, columbite-tantalite, gold, wolframite, and their derivatives, which are limited to tin, tantalum, tungsten and gold, referred to as 3TG.

If a registrant has reason to believe that any of the conflict minerals in their supply chain may have originated in the Democratic Republic of the Congo (“DRC”) or an adjoining country (together with the DRC, the “Covered Countries”), or a registrant is unable to determine the country of origin of those conflict minerals, then the registrant must exercise due diligence on the source and chain of custody of those conflict minerals.

Overview

Calix is a leading global provider of cloud and software platforms, systems and services that focus on the access network, the portion of the network that governs available bandwidth and determines the range and quality of services that can be offered to subscribers. Calix’s cloud and software platforms enable communication service providers to provide a wide range of revenue-generating services, from basic voice and data to advanced broadband services, over legacy and next-generation access networks. Calix primarily relies upon third-party manufacturing partners to manufacture its products, purchase components or materials that may contain smelted or refined minerals and purchase raw ore or minerals. Calix is several levels removed from the purchase of raw ore and minerals or the mining of conflict minerals which occurs much further upstream in the supply chain.

For purposes of Rule 13p-1, we engaged a third-party vendor to assist with survey efforts and outreach with our third-party manufacturing partners and to make inquiries regarding suppliers further upstream in order to ascertain information on the conflict mineral content in our products as well as the origin of the conflict minerals in components and materials in our products. We rely upon third-party manufacturing partners, consisting of contract manufacturers and original design manufacturers, to source for and produce our products based on our requirements, and in some cases, we have no visibility into the upstream suppliers and do not control the supplier sourcing decisions. In selecting manufacturing partners, we require partners to regularly engage with and assess their supplier base as relevant to the components and materials for Calix products.

Based on evaluations together with our manufacturing partners for 2022, we identified that some components and materials that are included in Calix access systems contain conflict minerals.

Reasonable Country of Origin Inquiry

In order to perform a reasonable country of origin inquiry, or RCOI, we and our third-party vendor worked directly with our suppliers and our third-party manufacturers to conduct surveys of their direct supplier base to determine whether the conflict minerals contained in components of Calix products originated from the Covered Countries. This survey was conducted using the Conflict Minerals Reporting Template (“CMRT”) developed by the Responsible Minerals Initiative (“RMI”), and included inquiries related to the facilities used to process conflict minerals, a supplier’s commitment and processes to support conflict free sourcing and the smelters and refiners used, including a supplier’s further inquiries made upstream in the supply chain to ascertain such information. The survey

was used to collect information to facilitate our understanding of the country of origin of conflict minerals and information on the conflict free status for smelters and refiners used by the supplier or its upstream suppliers.

For 2022, surveys were distributed to approximately 239 suppliers with a reported response rate of 98% for completed surveys. To support improved response rate and quality of the CMRT process, personnel that have oversight responsibilities for conflict minerals within our manufacturing partner organizations review the CMRT responses and engage with our manufacturing partners to conduct follow-up inquiries for CMRT completeness and accuracy. Information regarding the RMI is included in surveys sent to the supplier base and manufacturing partners generally provide information and training to assist suppliers with completing the CMRT.

Based on the RCOI described above, we have reason to believe that some of the components used in the manufacture of our products in 2022 contained conflict minerals that originated from the Covered Countries and were not sourced solely from recycled or scrap sources.

Supply Chain Due Diligence and Assessment

Based on the RCOI on our supply chain and as required by Rule 13p-1, we undertook due diligence on our supply chain. The objective of this due diligence was to ascertain whether the conflict minerals directly or indirectly financed or benefited arms groups in the Covered Countries, including for the smelters identified through the CMRTs as providing conflict minerals that originated from the Covered Countries.

Based on our RCOI for 2022, there were approximately 477 smelters and refiners that were identified by suppliers as a source of conflict minerals, of which 153 were known to be sourcing conflict minerals originating from the Covered Countries. We conducted further due diligence on our supply chain to assess the source and chain of custody of the conflict minerals applying due diligence measures designed to conform with the Organization for Economic Co-operation and Development Due Diligence Guidelines for Responsible Supply Chains of Minerals from High-Risk Areas and related supplements. These further actions included:

Based on the due diligence conducted, we determined that 153 of the smelters and refiners identified to supply conflict minerals originating in the Covered Countries are included on the RMI list of conformant, active and eligible smelters and refiners pursuant to the RMAP program operated by the RMI. Based on the information provided by our suppliers, we believe that the facilities that may have been used to process the 3TG minerals in our products include the smelters and refiners listed in Appendix I to this CMR. Pursuant to Rule 13p-1, this CMR is not subject to an independent private sector audit.

Ongoing Risk Management

We intend to continue our work with our manufacturing partners and suppliers to improve response rates to our conflict minerals surveys, including through direct and indirect outreach efforts, and to improve awareness upstream in the supply chain. We also expect to further refine conflict minerals assessments and inquiries as part of our supplier and manufacturer partner evaluation processes. This CMR is also available on Calix’s Investor Relations website at: https://investor-relations.calix.com under Governance – Governance Documents.

Forward-Looking Statements

Statements made in this report that are not statements of historical fact are forward-looking statements. Forward-looking statements are subject to the “safe harbor” provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements are based on our current expectations and assumptions about our business and operations and are subject to risks and uncertainties that could cause actual results to differ materially from expectations. These risks and uncertainties include the effect of changes in laws and regulations, economic, market and business conditions, the performance and operations of third-party partners and suppliers, availability of critical components and materials, and other risks as described in our Form 10-K and our quarterly reports on Form 10-Q, each as filed with the SEC. Forward-looking statements speak only as of the date the statements are made and are based on information available to us at the time those statements are made and/or management’s good faith belief as of that time with respect to future events. We assume no obligation to update forward-looking statements to reflect actual performance or results, changes in assumptions or changes in other factors affecting forward-looking information, except to the extent required by applicable securities laws.