UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM SD

Specialized Disclosure Report

Calix, Inc.

(Exact name of registrant as specified in its charter)

Delaware	001-34674	68-0438710
(State or other jurisdiction of incorporation)	(Commission File No.)	(I.R.S. Employer Identification No.)

2777 Orchard Parkway, San Jose, California 95134

(Address of Principal Executive Offices) (Zip Code)

Suzanne Tom

SVP, General Counsel

(408) 514-3000

(Name and telephone number, including area code, of the person to contact in connection with this report)

Check the appropriate box to indicate the rule to which this form is being filed and provide the period to which the information in this form applies:

xRule 13p-1 under the Securities Exchange Act (17 CFR 240.13p-1) for the reporting period from January 1 to December 31, 2020.

Section 1 – Conflict Minerals Disclosure

Item 1.01 Conflict Minerals Disclosure and Report

Conflict Minerals Disclosure

A copy of Calix, Inc.’s Conflict Minerals Report is provided as Exhibit 1.01 to this Form SD and is publicly available at https://investor-relations.calix.com under Governance – Governance Documents.

Item 1.02 Exhibit

As required by Item 1.01 of this Form SD, a Conflict Minerals Report has been filed as Exhibit 1.01 to this Form SD.

Section 2 – Exhibits

Item 2.01 Exhibits

The following exhibit is filed as part of this Form SD:

Exhibit 1.01 – Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form SD.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: June 1, 2021	CALIX, INC.
	By:	/s/ Suzanne Tom
		Suzanne Tom
		SVP, General Counsel

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