Edgar Filing: Zendesk, Inc.

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Schedule 13G

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1 (b), (c) AND (d)
AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2 (b)

(Amendment No. 1)*

Zendesk, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

98936J101

(CUSIP Number)

December 31, 2015

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

(Continued on following pages)

Page 1 of 19 Pages

Exhibit Index Contained on Page 18

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Page 2 of 19

1	NAME OF REPORTING PERSON Benchmark Capital Partners VI, L.P. (“BCP VI”)
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER 4,351,354 shares, except that Benchmark Capital Management Co. VI, L.L.C. (“BCMC VI”), the general partner of BCP VI, may be deemed to have sole power to vote these shares, and Alexandre Balkanski (“Balkanski”), Matthew R. Cohler (“Cohler”), Bruce W. Dunlevie (“Dunlevie”), Peter Fenton (“Fenton”), J. William Gurley (“Gurley”), Kevin R. Harvey (“Harvey”), Robert C. Kagle (“Kagle”), Mitchell H. Lasky (“Lasky”) and Steven M. Spurlock (“Spurlock”), the members of BCMC VI, may be deemed to have shared power to vote these shares.
	6	SHARED VOTING POWER See response to row 5.
	7	SOLE DISPOSITIVE POWER 4,351,354 shares, except that BCMC VI, the general partner of BCP VI, may be deemed to have sole power to dispose of these shares, and Balkanski, Cohler, Dunlevie, Fenton, Gurley, Harvey, Kagle, Lasky and Spurlock, the members of BCMC VI, may be deemed to have shared power to dispose of these shares.
	8	SHARED DISPOSITIVE POWER See response to row 7.

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON	4,351,354
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	o
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9	4.9%
12	TYPE OF REPORTING PERSON	PN

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Page 3 of 19

1	NAME OF REPORTING PERSON Benchmark Founders’ Fund VI, L.P. (“BFF VI”)
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER 272,139 shares, except that BCMC VI, the general partner of BFF VI, may be deemed to have sole power to vote these shares, and Balkanski, Cohler, Dunlevie, Fenton, Gurley, Harvey, Kagle, Lasky and Spurlock, the members of BCMC VI, may be deemed to have shared power to vote these shares.
	6	SHARED VOTING POWER See response to row 5.
	7	SOLE DISPOSITIVE POWER 272,139 shares, except that BCMC VI, the general partner of BFF VI, may be deemed to have sole power to dispose of these shares, and Balkanski, Cohler, Dunlevie, Fenton, Gurley, Harvey, Kagle, Lasky and Spurlock, the members of BCMC VI, may be deemed to have shared power to dispose of these shares.
	8	SHARED DISPOSITIVE POWER See response to row 7.

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON	272,139
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	o
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9	0.3%
12	TYPE OF REPORTING PERSON	PN

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Page 4 of 19

1	NAME OF REPORTING PERSON Benchmark Founders’ Fund VI-B, L.P. (“BFF VI-B”)
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER 178,605 shares, except that BCMC VI, the general partner of BFF VI-B, may be deemed to have sole power to vote these shares, and Balkanski, Cohler, Dunlevie, Fenton, Gurley, Harvey, Kagle, Lasky and Spurlock, the members of BCMC VI, may be deemed to have shared power to vote these shares.
	6	SHARED VOTING POWER See response to row 5.
	7	SOLE DISPOSITIVE POWER 178,605 shares, except that BCMC VI, the general partner of BFF VI-B, may be deemed to have sole power to dispose of these shares, and Balkanski, Cohler, Dunlevie, Fenton, Gurley, Harvey, Kagle, Lasky and Spurlock, the members of BCMC VI, may be deemed to have shared power to dispose of these shares.
	8	SHARED DISPOSITIVE POWER See response to row 7.

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON	178,605
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	o
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9	0.2%
12	TYPE OF REPORTING PERSON	PN

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Page 5 of 19

1	NAME OF REPORTING PERSON Benchmark Capital Management Co. VI, L.L.C.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER 5,271,173 shares, of which 4,351,354 are directly owned by BCP VI, 272,139 are directly owned by BFF VI, 178,605 are directly owned by BFF VI-B and 469,075 are held in nominee form for the benefit of persons associated with BCMC VI. BCMC VI, the general partner of BCP VI, BFF VI and BFF VI-B, may be deemed to have sole power to vote these shares, and Balkanski, Cohler, Dunlevie, Fenton, Gurley, Harvey, Kagle, Lasky and Spurlock, the members of BCMC VI, may be deemed to have shared power to vote these shares.
	6	SHARED VOTING POWER See response to row 5.
	7	SOLE DISPOSITIVE POWER 5,271,173 shares, of which 4,351,354 are directly owned by BCP VI, 272,139 are directly owned by BFF VI, 178,605 are directly owned by BFF VI-B and 469,075 are held in nominee form for the benefit of persons associated with BCMC VI. BCMC VI, the general partner of BCP VI, BFF VI and BFF VI-B, may be deemed to have sole power to dispose of these shares, and Balkanski, Cohler, Dunlevie, Fenton, Gurley, Harvey, Kagle, Lasky and Spurlock, the members of BCMC VI, may be deemed to have shared power to dispose of these shares.
	8	SHARED DISPOSITIVE POWER See response to row 7.

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON	5,271,173
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	o
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9	5.9%
12	TYPE OF REPORTING PERSON	OO

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Page 6 of 19

1	NAME OF REPORTING PERSON Alexandre Balkanski
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER 164,163 shares
	6	SHARED VOTING POWER 5,271,173 shares, of which 4,351,354 are directly owned by BCP VI, 272,139 are directly owned by BFF VI, 178,605 are directly owned by BFF VI-B and 469,075 are held in nominee form for the benefit of persons associated with BCMC VI. BCMC VI is the general partner of BCP VI, BFF VI and BFF VI-B, and Balkanski, a member of BCMC VI, may be deemed to have shared power to vote these shares.
	7	SOLE DISPOSITIVE POWER 164,163 shares
	8	SHARED DISPOSITIVE POWER 5,271,173 shares, of which 4,351,354 are directly owned by BCP VI, 272,139 are directly owned by BFF VI, 178,605 are directly owned by BFF VI-B and 469,075 are held in nominee form for the benefit of persons associated with BCMC VI. BCMC VI is the general partner of BCP VI, BFF VI and BFF VI-B, and Balkanski, a member of BCMC VI, may be deemed to have shared power to dispose of these shares.

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON	5,435,336
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	o
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9	6.1%
12	TYPE OF REPORTING PERSON	IN

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Page 7 of 19

1	NAME OF REPORTING PERSON Matthew R. Cohler
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER 137,419 shares
	6	SHARED VOTING POWER 5,271,173 shares, of which 4,351,354 are directly owned by BCP VI, 272,139 are directly owned by BFF VI, 178,605 are directly owned by BFF VI-B and 469,075 are held in nominee form for the benefit of persons associated with BCMC VI. BCMC VI is the general partner of BCP VI, BFF VI and BFF VI-B, and Cohler, a member of BCMC VI, may be deemed to have shared power to vote these shares.
	7	SOLE DISPOSITIVE POWER 137,419 shares
	8	SHARED DISPOSITIVE POWER 5,271,173 shares, of which 4,351,354 are directly owned by BCP VI, 272,139 are directly owned by BFF VI, 178,605 are directly owned by BFF VI-B and 469,075 are held in nominee form for the benefit of persons associated with BCMC VI. BCMC VI is the general partner of BCP VI, BFF VI and BFF VI-B, and Cohler, a member of BCMC VI, may be deemed to have shared power to dispose of these shares.

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON	5,408,592
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	o
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9	6.1%
12	TYPE OF REPORTING PERSON	IN

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Page 8 of 19

1	NAME OF REPORTING PERSON Bruce W. Dunlevie
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER 71,358 shares
	6	SHARED VOTING POWER 5,271,173 shares, of which 4,351,354 are directly owned by BCP VI, 272,139 are directly owned by BFF VI, 178,605 are directly owned by BFF VI-B and 469,075 are held in nominee form for the benefit of persons associated with BCMC VI. BCMC VI is the general partner of BCP VI, BFF VI and BFF VI-B, and Dunlevie, a member of BCMC VI, may be deemed to have shared power to vote these shares.
	7	SOLE DISPOSITIVE POWER 71,358 shares
	8	SHARED DISPOSITIVE POWER 5,271,173 shares, of which 4,351,354 are directly owned by BCP VI, 272,139 are directly owned by BFF VI, 178,605 are directly owned by BFF VI-B and 469,075 are held in nominee form for the benefit of persons associated with BCMC VI. BCMC VI is the general partner of BCP VI, BFF VI and BFF VI-B, and Dunlevie, a member of BCMC VI, may be deemed to have shared power to dispose of these shares.

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON	5,342,531
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	o
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9	6.0%
12	TYPE OF REPORTING PERSON	IN

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Page 9 of 19

1	NAME OF REPORTING PERSON Peter Fenton
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER 231,028 shares
	6	SHARED VOTING POWER 5,271,173 shares, of which 4,351,354 are directly owned by BCP VI, 272,139 are directly owned by BFF VI, 178,605 are directly owned by BFF VI-B and 469,075 are held in nominee form for the benefit of persons associated with BCMC VI. BCMC VI is the general partner of BCP VI, BFF VI and BFF VI-B, and Fenton, a member of BCMC VI, may be deemed to have shared power to vote these shares.
	7	SOLE DISPOSITIVE POWER 231,028 shares
	8	SHARED DISPOSITIVE POWER 5,271,173 shares, of which 4,351,354 are directly owned by BCP VI, 272,139 are directly owned by BFF VI, 178,605 are directly owned by BFF VI-B and 469,075 are held in nominee form for the benefit of persons associated with BCMC VI. BCMC VI is the general partner of BCP VI, BFF VI and BFF VI-B, and Fenton, a member of BCMC VI, may be deemed to have shared power to dispose of these shares.

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON	5,502,201
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	o
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9	6.2%
12	TYPE OF REPORTING PERSON	IN

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Page 10 of 19

1	NAME OF REPORTING PERSON J. William Gurley
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER 82,891 shares
	6	SHARED VOTING POWER 5,271,173 shares, of which 4,351,354 are directly owned by BCP VI, 272,139 are directly owned by BFF VI, 178,605 are directly owned by BFF VI-B and 469,075 are directly owned by BFF VI-B and 413,419 are held in nominee form for the benefit of persons associated with BCMC VI. BCMC VI is the general partner of BCP VI, BFF VI and BFF VI-B, and Gurley, a member of BCMC VI, may be deemed to have shared power to vote these shares.
	7	SOLE DISPOSITIVE POWER 82,891 shares
	8	SHARED DISPOSITIVE POWER 5,271,173 shares, of which 4,351,354 are directly owned by BCP VI, 272,139 are directly owned by BFF VI, 178,605 are directly owned by BFF VI-B and 469,075 are held in nominee form for the benefit of persons associated with BCMC VI. BCMC VI is the general partner of BCP VI, BFF VI and BFF VI-B, and Gurley, a member of BCMC VI, may be deemed to have shared power to dispose of these shares.

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON	5,354,064
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	o
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9	6.0%
12	TYPE OF REPORTING PERSON	IN

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Page 11 of 19

1	NAME OF REPORTING PERSON Kevin R. Harvey
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER 352,661 shares
	6	SHARED VOTING POWER 5,271,173 shares, of which 4,351,354 are directly owned by BCP VI, 272,139 are directly owned by BFF VI, 178,605 are directly owned by BFF VI-B and 469,075 are held in nominee form for the benefit of persons associated with BCMC VI. BCMC VI is the general partner of BCP VI, BFF VI and BFF VI-B, and Harvey, a member of BCMC VI, may be deemed to have shared power to vote these shares.
	7	SOLE DISPOSITIVE POWER 352,661 shares
	8	SHARED DISPOSITIVE POWER 5,271,173 shares, of which 4,351,354 are directly owned by BCP VI, 272,139 are directly owned by BFF VI, 178,605 are directly owned by BFF VI-B and 469,075 are held in nominee form for the benefit of persons associated with BCMC VI. BCMC VI is the general partner of BCP VI, BFF VI and BFF VI-B, and Harvey, a member of BCMC VI, may be deemed to have shared power to dispose of these shares.

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON	5,623,834
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	o
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9	6.3%
12	TYPE OF REPORTING PERSON	IN

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Page 12 of 19

1	NAME OF REPORTING PERSON Robert C. Kagle
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER 55,010 shares
	6	SHARED VOTING POWER 5,271,173 shares, of which 4,351,354 are directly owned by BCP VI, 272,139 are directly owned by BFF VI, 178,605 are directly owned by BFF VI-B and 469,075 are held in nominee form for the benefit of persons associated with BCMC VI. BCMC VI is the general partner of BCP VI, BFF VI and BFF VI-B, and Kagle, a member of BCMC VI, may be deemed to have shared power to vote these shares.
	7	SOLE DISPOSITIVE POWER 55,010 shares
	8	SHARED DISPOSITIVE POWER 5,271,173 shares, of which 4,351,354 are directly owned by BCP VI, 272,139 are directly owned by BFF VI, 178,605 are directly owned by BFF VI-B and 469,075 are held in nominee form for the benefit of persons associated with BCMC VI. BCMC VI is the general partner of BCP VI, BFF VI and BFF VI-B, and Kagle, a member of BCMC VI, may be deemed to have shared power to dispose of these shares.

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON	5,326,183
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	o
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9	6.0%
12	TYPE OF REPORTING PERSON	IN

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Page 13 of 19

1	NAME OF REPORTING PERSON Mitchell H. Lasky
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER 0 shares
	6	SHARED VOTING POWER 5,271,173 shares, of which 4,351,354 are directly owned by BCP VI, 272,139 are directly owned by BFF VI, 178,605 are directly owned by BFF VI-B and 469,075 are held in nominee form for the benefit of persons associated with BCMC VI. BCMC VI is the general partner of BCP VI, BFF VI and BFF VI-B, and Lasky, a member of BCMC VI, may be deemed to have shared power to vote these shares..
	7	SOLE DISPOSITIVE POWER 0 shares
	8	SHARED DISPOSITIVE POWER 5,271,173 shares, of which 4,351,354 are directly owned by BCP VI, 272,139 are directly owned by BFF VI, 178,605 are directly owned by BFF VI-B and 469,075 are held in nominee form for the benefit of persons associated with BCMC VI. BCMC VI is the general partner of BCP VI, BFF VI and BFF VI-B, and Lasky, a member of BCMC VI, may be deemed to have shared power to dispose of these shares.

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON	5,271,173
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	o
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9	5.9%
12	TYPE OF REPORTING PERSON	IN

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Page 14 of 19

1	NAME OF REPORTING PERSON Steven M. Spurlock
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) x
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER 0 shares
	6	SHARED VOTING POWER 5,271,173 shares, of which 4,351,354 are directly owned by BCP VI, 272,139 are directly owned by BFF VI, 178,605 are directly owned by BFF VI-B and 469,075 are held in nominee form for the benefit of persons associated with BCMC VI. BCMC VI is the general partner of BCP VI, BFF VI and BFF VI-B, and Spurlock, a member of BCMC VI, may be deemed to have shared power to vote these shares.
	7	SOLE DISPOSITIVE POWER 0 shares
	8	SHARED DISPOSITIVE POWER 5,271,173 shares, of which 4,351,354 are directly owned by BCP VI, 272,139 are directly owned by BFF VI, 178,605 are directly owned by BFF VI-B and 469,075 are held in nominee form for the benefit of persons associated with BCMC VI. BCMC VI is the general partner of BCP VI, BFF VI and BFF VI-B, and Spurlock, a member of BCMC VI, may be deemed to have shared power to dispose of these shares.

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON	5,271,173
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	o
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9	5.9%
12	TYPE OF REPORTING PERSON	IN

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This Amendment No. 1 amends and restates in its entirety the Schedule 13G previously filed by Benchmark Capital Partners VI, L.P., a Delaware limited partnership (“BCP VI”), Benchmark Founders’ Fund VI, L.P., a Delaware limited partnership (“BFF VI”), Benchmark Founders’ Fund VI-B, L.P., a Delaware limited partnership (“BFF VI-B”), Benchmark Capital Management Co. VI, L.L.C., a Delaware limited liability company (“BCMC VI”), and Matthew R. Cohler (“Cohler”), Bruce W. Dunlevie (“Dunlevie”), Peter Fenton (“Fenton”), J. William Gurley (“Gurley”), Kevin R. Harvey (“Harvey”), Mitchell H. Lasky (“Lasky”) and Steven M. Spurlock (“Spurlock”) (together with all prior and current amendments thereto, this “Schedule 13G”).

ITEM 1(A).

NAME OF ISSUER

Zendesk, Inc.

ITEM 1(B).

ADDRESS OF ISSUER’S PRINCIPAL EXECUTIVE OFFICES

1019 Market Street

San Francisco, California 94103

ITEM 2(A).

NAME OF PERSONS FILING

This Statement is filed by BCP VI, BFF VI, BFF VI-B, BCMC VI, Alexandre Balkanski (“Balkanski”), Cohler, Dunlevie, Fenton, Gurley, Harvey, Robert C. Kagle (“Kagle”) Lasky and Spurlock. The foregoing entities and individuals are collectively referred to as the “Reporting Persons.”

BCMC VI, the general partner of BCP VI, BFF VI and BFF VI-B, may be deemed to have sole power to vote and sole power to dispose of shares of the issuer directly owned by BCP VI, BFF VI and BFF VI-B. Balkanski, Cohler, Dunlevie, Fenton, Gurley, Harvey, Kagle, Lasky and Spurlock are members of BCMC VI and may be deemed to have shared power to vote and shared power to dispose of shares of the issuer directly owned by BCP VI, BFF VI and BFF VI-B.

ITEM 2(B).

ADDRESS OF PRINCIPAL BUSINESS OFFICE

The address for each reporting person is:

Benchmark Capital

2965 Woodside Road

Woodside, California 94062

ITEM 2(C).

CITIZENSHIP

BCP VI, BFF VI and BFF VI-B are Delaware limited partnerships. BCMC VI is a Delaware limited liability company. Balkanski, Cohler, Dunlevie, Fenton, Gurley, Harvey, Kagle, Lasky and Spurlock are United States Citizens.

ITEM 2(D) and (E).

TITLE OF CLASS OF SECURITIES AND CUSIP NUMBER

Common Stock

CUSIP # 98936J101

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.

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The following information with respect to the ownership of the Common Stock of the issuer by the persons filing this Statement is provided as of December 31, 2015 (based on 88,697,514 shares of Common Stock of the issuer outstanding as of October 31, 2015 as reported by the issuer on Form 10-Q for the period ended September 30, 2015 and filed with the Securities and Exchange Commission on November 6, 2015).

(a)

Amount beneficially owned:

See Row 9 of cover page for each Reporting Person.

(b)

Percent of Class:

See Row 11 of cover page for each Reporting Person.

(c)

Number of shares as to which such person has:

(i)

Sole power to vote or to direct the vote:

See Row 5 of cover page for each Reporting Person.

(ii)

Shared power to vote or to direct the vote:

See Row 6 of cover page for each Reporting Person.

(iii)

Sole power to dispose or to direct the disposition of:

See Row 7 of cover page for each Reporting Person.

(iv)

Shared power to dispose or to direct the disposition of:

See Row 8 of cover page for each Reporting Person.

ITEM 5.

OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS

Not applicable.

ITEM 6.

OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON

Under certain circumstances set forth in the limited partnership agreements of BCP VI, BFF VI and BFF VI-B, and the limited liability company agreement of BCMC VI, the general and limited partners or members, as the case may be, of each of such entities may be deemed to have the right to receive dividends from, or the proceeds from, the sale of shares of the issuer owned by each such entity of which they are a partner or member, as the case may be.

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. 98936J101

13 G

Page 17 of 19

SIGNATURES

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

Date: February 10, 2016

	BENCHMARK CAPITAL PARTNERS VI, L.P., a Delaware Limited Partnership

	BENCHMARK FOUNDERS’ FUND VI, L.P., a Delaware Limited Partnership

	BENCHMARK FOUNDERS’ FUND VI-B, L.P., a Delaware Limited Partnership

	BENCHMARK CAPITAL MANAGEMENT CO. VI, L.L.C., a Delaware Limited Liability Company

	By:	/s/ Steven M. Spurlock
		Steven M. Spurlock
		Managing Member

	ALEXANDRE BALKANSKI
	MATTHEW R. COHLER
	BRUCE W. DUNLEVIE
	PETER FENTON
	J. WILLIAM GURLEY
	KEVIN R. HARVEY
	ROBERT C. KAGLE
	MITCHELL H. LASKY
	STEVEN M. SPURLOCK

	By:	/s/ Steven M. Spurlock
		Steven M. Spurlock
		Attorney-in-Fact

CUSIP NO. 98936J101

13 G

Page 18 of 19

EXHIBIT INDEX

	Found on Sequentially
Exhibit	Numbered Page

Exhibit A: Agreement of Joint Filing		19

CUSIP NO. 98936J101

13 G

Page 19 of 19

exhibit A

Agreement of Joint Filing

The Reporting Persons agree that a single Schedule 13G (or any amendment thereto) relating to the Common Stock of Zendesk, Inc. shall be filed on behalf of each Reporting Person. Note that copies of the applicable Agreement of Joint Filings are already on file with the appropriate agencies.