Washington, D.C. 20549

Calix, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

13100M509

(CUSIP Number)

December 31, 2010

(Date of Event Which Requires Filing of this Statement)

 

 

CUSIP No.		13100M509

¹ The percentages reported in this Schedule 13G are based upon 37,372,663 shares of Common Stock outstanding as of October 14, 2010 (according to the Form 10-Q filed by the issuer on October 22, 2010).

CUSIP No.		13100M509

CUSIP No.		13100M509

CUSIP No.		13100M509

CUSIP No.		13100M509

CUSIP No.		13100M509

CUSIP No.		13100M509

CUSIP No.		13100M509

CUSIP No.		13100M509

CUSIP No.		13100M509

NOTE: This Statement on Schedule 13G is being filed on behalf of: (i) Azure Venture Partners I, L.P., (ii) Azure Ventures I, L.P., (iii) Azure Partners I, L.P., (iv) Azure I, L.P., (together with Azure Venture Partners I, L.P., Azure Ventures I, L.P. and Azure Partners I, L.P., the “Azure Investing Entities”) (v) Azure Capital Partners VC Administrators, LLC, which is sole general partner of each of Azure Venture Partners I, L.P. and Azure Ventures I, L.P., (vi) Azure Capital Partners CO Administrators, LLC (together with Azure Capital Partners VC Administrators, LLC, the “Azure GP Entities”), which is the sole general partner of each of Azure Partners I, L.P. and Azure I, L.P., (vii) Paul Ferris (“Mr. Ferris”), a manager of each of the Azure GP Entities, (viii) Michael Kwatinetz (“Mr. Kwatinetz”), a manager of each of the Azure GP Entities (ix) Cameron Lester (“Mr. Lester”), a manager of each of the Azure GP Entities and (x) Paul Weinstein (“Mr. Weinstein”), a manager of each of the Azure GP Entities. Mr. Ferris, Mr. Kwatinetz, Mr. Lester and Mr. Weinstein (collectively, the “Managers”) may be deemed to have shared voting and investment power over the shares held by each of the Azure Investing Entities and therefore may be deemed to share beneficial ownership of the shares held by Azure Investing Entities by virtue of their status as controlling persons of each of the Azure GP Entities. Each of these individuals disclaims beneficial ownership of such shares, except to the extent of his or her pecuniary interest therein. Each of the Azure GP Entities disclaims beneficial ownership of the shares held by the Azure Investing Entities, except to the extent of each such entity’s pecuniary interest therein.

CUSIP No.		13100M509

Item 1(a)		Name of Issuer

Calix, Inc.

Item 1(b)		Address of Issuer’s Principal Executive Offices

1035 N. McDowell Boulevard
Petaluma, CA 94954

Item 2(a)		Name of Person Filing

This Statement on Schedule 13G is being filed on behalf of the following:

(i) Azure Venture Partners I, L.P., a Delaware limited partnership;

(ii) Azure Ventures I, L.P., a Delaware limited partnership;

(iii) Azure Partners I, L.P., a Delaware limited partnership;

(iv) Azure I, L.P., a Delaware limited partnership (together with Azure Venture Partners I, L.P., Azure Ventures I, L.P. and Azure Partners I, L.P., the “Azure Investing Entities”);

(v) Azure Capital Partners VC Administrators, LLC, a Delaware limited liability company and the sole general partner of each of Azure Venture Partners I, L.P. and Azure Ventures I, L.P.;

(vi) Azure Capital Partners CO Administrators, LLC (together with Azure Capital Partners VC Administrators, LLC, the “Azure GP Entities”), a Delaware limited liability company and the sole general partner of each of Azure Partners I, L.P. and Azure I, L.P.;

(vii) Paul Ferris (“Mr. Ferris”), a manager of each of the Azure GP Entities;

(viii) Michael Kwatinetz (“Mr. Kwatinetz”), a manager of each of the Azure GP Entities;

(ix) Cameron Lester (“Mr. Lester”), a manager of each of the Azure GP Entities; and

(x) Paul Weinstein (“Mr. Weinstein”), a manager of each of the Azure GP Entities.

The foregoing entities and individuals are collectively referred to as the “Reporting Persons.”

Mr. Ferris, Mr. Kwatinetz, Mr. Lester and Mr. Weinstein (collectively, the “Managers”) may be deemed to have shared voting and investment power over the shares held by each of the Azure Investing Entities and therefore may be deemed to share beneficial ownership of the shares held by Azure Investing Entities by virtue of their status as controlling persons of each of the Azure GP Entities. Each of these individuals disclaims beneficial ownership of such shares, except to the extent of his or her pecuniary interest therein. Each of the Azure GP Entities disclaims beneficial ownership of the shares held by the Azure Investing Entities, except to the extent of each such entity’s pecuniary interest therein.

CUSIP No.		13100M509

Item 2(b)		Address of Principal Business Office

The address of each of the reporting persons is:
650 California Street
11th Floor
San Francisco, CA 94108

Item 2(c)		Citizenship

Azure Venture Partners I, L.P.		Delaware
Azure Ventures I, L.P.		Delaware
Azure Partners I, L.P.		Delaware
Azure I, L.P.		Delaware
Azure Capital Partners VC Administrators, LLC		Delaware
Azure Capital Partners CO Administrators, LLC		Delaware
Mr. Ferris		United States of America
Mr. Kwatinetz		United States of America
Mr. Lester		United States of America
Mr. Weinstein		United States of America

Item 2(d)		Title of Class of Securities

Common Stock

Item 2(e)		CUSIP Number

CUSIP # 13100M509

Item 3		Not applicable.

Item 4		Ownership

Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.

(a)

Amount beneficially owned:

As of December 31, 2010, each of the following is the owner of record of the shares of Common Stock set forth next to his or its name:

Azure Venture Partners I, L.P.			2,523,656
Azure Ventures I, L.P.			78,476
Azure Partners I, L.P.			41,430
Azure I, L.P.			1,181
Azure Capital Partners VC Administrators, LLC			2,602,132
Azure Capital Partners CO Administrators, LLC			42,611
Mr. Ferris			2,644,743
Mr. Kwatinetz			2,644,743
Mr. Lester			2,644,743
Mr. Weinstein			2,644,743

As of December 31, 2010, Azure Venture Partners I, L.P. was the record owner of and beneficially owned 2,523,656 shares of Common Stock. Azure Capital Partners VC Administrators, LLC has the power to vote or direct the disposition of all of such shares.

CUSIP No.		13100M509

As of December 31, 2010, Azure Ventures I, L.P. was the record owner of and beneficially owned 78,476 shares of Common Stock. Azure Capital Partners VC Administrators, LLC has the power to vote or direct the disposition of all of such shares.

As of December 31, 2010, Azure Partners I, L.P. was the record owner of and beneficially owned 41,430 shares of Common Stock. Azure Capital Partners CO Administrators, LLC has the power to vote or direct the disposition of all of such shares.

As of December 31, 2010, Azure I, L.P. was the record owner of and beneficially owned 1,181 shares of Common Stock. Azure Capital Partners CO Administrators, LLC has the power to vote or direct the disposition of all of such shares.

As of December 31, 2010, Azure Capital Partners VC Administrators, LLC was the record owner of and beneficially owned 2,602,132 shares (the “Azure VC Shares”) of Common Stock. Azure Capital Partners VC Administrators, LLC has the power to vote or direct the disposition of all of the Azure VC Shares.

As of December 31, 2010, Azure Capital Partners CO Administrators, LLC was the record owner of and beneficially owned 42,611 shares (the “Azure CO Shares” and together with the Azure VC Shares, the “Shares”) of Common Stock. Azure Capital Partners CO Administrators, LLC has the power to vote or direct the disposition of all of the Azure CO Shares.

The Managers may be deemed to have shared voting and investment power over the shares held by each of the Azure Investing Entities and therefore may be deemed to share beneficial ownership of the Shares by virtue of their status as controlling persons of each of the Azure GP Entities. Each of the Managers disclaims beneficial ownership of the Shares, except to the extent of his or her pecuniary interest therein. Each of the Azure GP Entities disclaims beneficial ownership of the Shares, except to the extent of such entity’s pecuniary interest therein.

(b)

Percent of class:

Azure Venture Partners I, L.P.			6.8	%
Azure Ventures I, L.P.			0.2	%
Azure Partners I, L.P.			0.1	%
Azure I, L.P.			0.0	%
Azure Capital Partners VC Administrators, LLC			7.0	%
Azure Capital Partners CO Administrators, LLC			0.1	%
Mr. Ferris			7.1	%
Mr. Kwatinetz			7.1	%
Mr. Lester			7.1	%
Mr. Weinstein			7.1	%

CUSIP No.		13100M509

(c)

Number of shares as to which the Reporting Person has:

		Number of Shares
Reporting Person		(i)				(ii)				(iii)				(iv)
Azure Venture Partners I, L.P.			2,523,656				0				2,523,656				0
Azure Ventures I, L.P.			78,476				0				78,476				0
Azure Partners I, L.P.			41,430				0				41,430				0
Azure I, L.P.			1,181				0				1,181				0
Azure Capital Partners VC Administrators, LLC			2,602,132				0				2,602,132				0
Azure Capital Partners CO Administrators, LLC			42,611				0				42,611				0
Mr. Ferris			0				2,644,743				0				2,644,743
Mr. Kwatinetz			0				2,644,743				0				2,644,743
Mr. Lester			0				2,644,743				0				2,644,743
Mr. Weinstein			0				2,644,743				0				2,644,743

Item 5		Ownership of Five Percent or Less of a Class

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than 5 percent of the class of securities, check the following o.

Item 6		Ownership of More than Five Percent on Behalf of Another Person

Not applicable.

Item 7		Identification and Classification of the Subsidiary which Acquired the Security Being Reported on by the Parent Holding Company

Not applicable.

Item 8		Identification and Classification of Members of the Group

Not applicable.

Item 9		Notice of Dissolution of Group

Not applicable.

Item 10		Certification

Not applicable.

CUSIP No.		13100M509

SIGNATURE

After reasonable inquiry and to the best of its knowledge and belief, the undersigned certify that the information set forth in this statement is true, complete and correct.

DATED: February 14, 2011.

		AZURE VENTURE PARTNERS I, L.P.
		By:		Azure Capital Partners VC Administrators, LLC, its general partner
				By:		/s/ Paul Ferris
						Name: Paul Ferris
						Title:   Manager
		AZURE VENTURES I, L.P.
		By:		Azure Capital Partners VC Administrators, LLC, its general partner
				By:		/s/ Paul Ferris
						Name: Paul Ferris
						Title:   Manager
		AZURE PARTNERS I, L.P.
		By:		Azure Capital Partners CO Administrators, LLC, its general partner
				By:		/s/ Paul Ferris
						Name: Paul Ferris
						Title:   Manager
		AZURE I, L.P.
		By:		Azure Capital Partners CO Administrators, LLC, its general partner
				By:		/s/ Paul Ferris
						Name: Paul Ferris
						Title:   Manager

CUSIP No.		13100M509

		AZURE CAPITAL PARTNERS VC ADMINISTRATORS, LLC
		By:		/s/ Paul Ferris
				Name: Paul Ferris
				Title:   Manager
		AZURE CAPITAL PARTNERS CO ADMINISTRATORS, LLC
		By:		/s/ Paul Ferris
				Name: Paul Ferris
				Title:   Manager
				/s/ Paul Ferris
				Paul Ferris
				/s/ Michael Kwatinetz
				Michael Kwatinetz
				/s/ Cameron Lester
				Cameron Lester
				/s/ Paul Weinstein
				Paul Weinstein

CUSIP No.		13100M509

EXHIBIT INDEX

Exhibit
Exhibit A:		Agreement of Joint Filing