Volcano SC 13D/A | VOLC 29 Sep 14

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

(Rule 13d-101)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT

TO § 240.13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO

§ 240.13d-2(a)

(Amendment No. 1)1

Volcano Corporation

(Name of Issuer)

Common Stock, $0.001 par value per share

(Title of Class of Securities)

928645100

(CUSIP Number)

GLENN W. WELLING

ENGAGED CAPITAL, LLC

610 Newport Center Drive, Suite 250

Newport Beach, California 92660

(949) 734-7900

STEVE WOLOSKY, ESQ.

OLSHAN FROME WOLOSKY LLP

Park Avenue Tower

65 East 55th Street

New York, New York 10022

(212) 451-2300

(Name, Address and Telephone Number of Person

Authorized to Receive Notices and Communications)

September 29, 2014

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box ¨.

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See § 240.13d-7 for other parties to whom copies are to be sent.

_______________

1 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).

CUSIP NO. 928645100

1	NAME OF REPORTING PERSON Engaged Capital Master Feeder I, LP
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS WC
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION CAYMAN ISLANDS
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 461,039
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 461,039
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 461,039*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) Less than 1%
14	TYPE OF REPORTING PERSON PN

*Includes an aggregate of 323,044 Shares underlying call options exercisable within 60 days hereof.

CUSIP NO. 928645100

1	NAME OF REPORTING PERSON Engaged Capital Master Feeder II, LP
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS WC
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION CAYMAN ISLANDS
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 536,752
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 536,752
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 536,752*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 1.0%
14	TYPE OF REPORTING PERSON PN

___________________

* Includes an aggregate of 272,956 Shares underlying call options exercisable within 60 days hereof.

CUSIP NO. 928645100

1	NAME OF REPORTING PERSON Pulse LP
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS WC
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION CAYMAN ISLANDS
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 1,640,612
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 1,640,612
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,640,612
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 3.2%
14	TYPE OF REPORTING PERSON PN

CUSIP NO. 928645100

1	NAME OF REPORTING PERSON Engaged Capital I, LP
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 461,039
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 461,039
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 461,039*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) Less than 1%
14	TYPE OF REPORTING PERSON PN

__________________

* Includes an aggregate of 323,044 Shares underlying call options exercisable within 60 days hereof.

CUSIP NO. 928645100

1	NAME OF REPORTING PERSON Engaged Capital I Offshore, Ltd.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION CAYMAN ISLANDS
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 461,039
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 461,039
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 461,039*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) Less than 1%
14	TYPE OF REPORTING PERSON CO

__________________

* Includes an aggregate of 323,044 Shares underlying call options exercisable within 60 days hereof.

CUSIP NO. 928645100

1	NAME OF REPORTING PERSON Engaged Capital II, LP
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 536,752
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 536,752
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 536,752*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 1.0%
14	TYPE OF REPORTING PERSON PN

__________________

* Includes an aggregate of 272,956 Shares underlying call options exercisable within 60 days hereof.

CUSIP NO. 928645100

1	NAME OF REPORTING PERSON Engaged Capital II Offshore Ltd.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION CAYMAN ISLANDS
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 536,752
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 536,752
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 536,752*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 1.0%
14	TYPE OF REPORTING PERSON CO

__________________

* Includes an aggregate of 272,956 Shares underlying call options exercisable within 60 days hereof.

CUSIP NO. 928645100

1	NAME OF REPORTING PERSON Pulse Ltd.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION CAYMAN ISLANDS
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 1,640,612
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 1,640,612
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,640,612
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 3.2%
14	TYPE OF REPORTING PERSON CO

CUSIP NO. 928645100

1	NAME OF REPORTING PERSON Engaged Capital, LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 2,638,403
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 2,638,403
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,638,403*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 5.1%
14	TYPE OF REPORTING PERSON OO

__________________

* Includes an aggregate of 596,000 Shares underlying call options exercisable within 60 days hereof.

CUSIP NO. 928645100

1	NAME OF REPORTING PERSON Engaged Capital Holdings, LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 2,638,403
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 2,638,403
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,638,403*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 5.1%
14	TYPE OF REPORTING PERSON OO

__________________

* Includes an aggregate of 596,000 Shares underlying call options exercisable within 60 days hereof.

CUSIP NO. 928645100

1	NAME OF REPORTING PERSON Glenn W. Welling
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION USA
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 2,638,403
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 2,638,403
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,638,403*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 5.1%
14	TYPE OF REPORTING PERSON IN

__________________

* Includes an aggregate of 596,000 Shares underlying call options exercisable within 60 days hereof.

CUSIP NO. 928645100

The following constitutes Amendment No. 1 to the Schedule 13D filed by the undersigned (“Amendment No. 1”). This Amendment No. 1 amends the Schedule 13D as specifically set forth herein.

Item 2.

Identity and Background.

Item 2 is hereby amended and restated to read as follows:

(a) This statement is filed by:

(i)

Engaged Capital Master Feeder I, LP, a Cayman Islands exempted limited partnership (“Engaged Capital Master I”), with respect to the Shares directly and beneficially owned by it;

(ii)

Engaged Capital Master Feeder II, LP, a Cayman Islands exempted limited partnership (“Engaged Capital Master II”), with respect to the Shares directly and beneficially owned by it;

(iii)

Pulse LP, a Cayman Islands exempted limited partnership (“Pulse LP”), with respect to the Shares directly and beneficially owned by it;

(iv)

Engaged Capital I, LP, a Delaware limited partnership (“Engaged Capital I”), as a feeder fund of Engaged Capital Master I;

(v)

Engaged Capital I Offshore, Ltd., a Cayman Islands exempted company (“Engaged Capital Offshore”), as a feeder fund of Engaged Capital Master I;

(vi)

Engaged Capital II, LP, a Delaware limited partnership (“Engaged Capital II”), as a feeder fund of Engaged Capital Master II;

(vii)

Engaged Capital II Offshore Ltd., a Cayman Islands exempted company (“Engaged Capital Offshore II”), as a feeder fund of Engaged Capital Master II;

(viii)

Pulse Ltd., a Cayman Islands exempted company (“Pulse Ltd.”), as a feeder fund of Pulse LP;

(ix)

Engaged Capital, LLC, a Delaware limited liability company (“Engaged Capital”), as the general partner and investment advisor of each of Engaged Capital Master I, Engaged Capital Master II and Pulse LP;

(x)

Engaged Capital Holdings, LLC, a Delaware limited liability company (“Engaged Holdings”), as the managing member of Engaged Capital; and

(xi)

Glenn W. Welling, as the managing member and Chief Investment Officer (“CIO”) of Engaged Capital and the sole member of Engaged Holdings.

CUSIP NO. 928645100

Each of the foregoing is referred to as a “Reporting Person” and collectively as the “Reporting Persons.” Each of the Reporting Persons is party to that certain Joint Filing Agreement, as further described in Item 6. Accordingly, the Reporting Persons are hereby filing a joint Schedule 13D.

(b) The address of the principal office of each of Engaged Capital Master I, Engaged Capital Master II, Pulse LP, Engaged Capital Offshore, Engaged Capital Offshore II and Pulse Ltd. is c/o Codan Trust Company (Cayman) Ltd., Cricket Square, Hutchins Drive, P.O. Box 2681, Grand Cayman KY1-1111, Cayman Islands. The address of the principal office of each of Engaged Capital I, Engaged Capital II, Engaged Capital, Engaged Holdings and Mr. Welling is 610 Newport Center Drive, Suite 250, Newport Beach, California 92660. The officers and directors of each of Engaged Capital Offshore, Engaged Capital Offshore II and Pulse Ltd. and their principal occupations and business addresses are set forth on Schedule A and are incorporated by reference in this Item 2.

(c) The principal business of each of Engaged Capital Master I, Engaged Capital Master II and Pulse LP is investing in securities. Each of Engaged Capital I and Engaged Capital Offshore is a private investment partnership that serves as a feeder fund of Engaged Capital Master I. Each of Engaged Capital II and Engaged Capital Offshore II is a private investment partnership that serves as a feeder fund of Engaged Capital Master II. Pulse Ltd. is private investment company that serves as a feeder fund of Pulse LP. Engaged Capital is a registered investment advisor and serves as the investment adviser to each of Engaged Capital Master I, Engaged Capital Master II, Pulse LP, Engaged Capital I, Engaged Capital Offshore, Engaged Capital II, Engaged Capital Offshore II and Pulse Ltd. Engaged Capital is also the general partner of each of Engaged Capital Master I, Engaged Capital Master II, Pulse LP, Engaged Capital I, and Engaged Capital II. Engaged Holdings serves as the managing member of Engaged Capital. Mr. Welling is the Founder, Managing Member and CIO of Engaged Capital, the sole member of Engaged Holdings and a director of each of Engaged Capital Offshore and Engaged Capital Offshore II.

(d) No Reporting Person, nor any person listed on Schedule A, annexed hereto, has, during the last five years, been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors).

(e) No Reporting Person, nor any person listed on Schedule A, annexed hereto, has, during the last five years, been party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

(f) Engaged Capital Master I, Engaged Capital Master II, Pulse LP, Engaged Capital Offshore, Engaged Capital Offshore II and Pulse Ltd. are organized under the laws of the Cayman Islands. Engaged Capital I, Engaged Capital II, Engaged Capital and Engaged Holdings are organized under the laws of the State of Delaware. Mr. Welling is a citizen of the United States of America. The citizenship of the persons listed on Schedule A is set forth therein.

Item 3.

Source and Amount of Funds or Other Consideration.

Item 3 is hereby amended and restated to read as follows:

The Shares purchased by each of Engaged Capital Master I, Engaged Capital Master II and Pulse LP were purchased with working capital (which may, at any given time, include margin loans made by brokerage firms in the ordinary course of business) in open market purchases, except as otherwise noted, as set forth in Schedule B, which is incorporated by reference herein. The aggregate purchase price of the 137,995 Shares beneficially owned by Engaged Capital Master I is approximately $2,872,040, including brokerage commissions. The aggregate purchase price of certain call options exercisable into 323,044 Shares beneficially owned by Engaged Capital Master I is approximately $1,741,172, including brokerage commissions. The aggregate purchase price of the 263,796 Shares beneficially owned by Engaged Capital Master II is approximately $5,629,881, including brokerage commissions. The aggregate purchase price of certain call options exercisable into 272,956 Shares beneficially owned by Engaged Capital Master II is approximately $1,591,253, including brokerage commissions. The aggregate purchase price of the 1,640,612 Shares beneficially owned by Pulse LP is approximately $36,987,126, including brokerage commissions.

CUSIP NO. 928645100

Item 4.

Purpose of Transaction.

Item 4 is hereby amended to add the following:

On September 29, 2014, Engaged Capital delivered an open letter (the “Letter”) to the Board of Directors of the Issuer (the “Board”). The Letter detailed a myriad of strategic, operational, communication and financial failures under the current Board and management team, which have resulted in the continued underperformance of the Issuer and material destruction of shareholder value. Among the Issuer’s continued missteps, Engaged Capital cited the Issuer’s bloated expense structure, value-destructive capital allocation, flailing corporate strategy, wildly inconsistent investor communications and excessive executive compensation.

Accordingly, Engaged Capital concluded the current Board and management team are no longer the appropriate custodians of the Issuer’s assets. Engaged Capital insisted that the Board immediately add shareholder representatives and begin a parallel process to evaluate strategic alternatives and conduct a CEO search for candidates with a history of driving profitability and extracting value from medical device assets in the event the Issuer remains an independent company.

The foregoing description of the Letter is qualified in its entirety by reference to the full text of the Letter, which is attached as Exhibit 99.1 hereto and is incorporated herein by reference.

Item 5.

Interest in Securities of the Issuer.

Item 5(a) – (c) are hereby amended and restated to read as follows:

(a) The aggregate percentage of Shares reported owned by each person named herein is based upon 51,460,461 Shares outstanding as of August 4, 2014, which is the total number of Shares outstanding as reported in the Issuer’s Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 8, 2014.

As of the close of business on September 26, 2014, Engaged Capital Master I beneficially owned 461,039 Shares, including an aggregate of 323,044 Shares underlying the call options referenced in Item 6, constituting less than 1% of the Shares outstanding. Each of Engaged Capital I and Engaged Capital Offshore, as feeder funds of Engaged Capital Master I, may be deemed to beneficially own the 461,039 Shares owned by Engaged Capital Master I, constituting less than 1% of the Shares outstanding.

As of the close of business on September 26, 2014, Engaged Capital Master II beneficially owned 536,752 Shares, including an aggregate of 272,956 Shares underlying the call options referenced in Item 6, constituting approximately 1.0% of the Shares outstanding. Each of Engaged Capital II and Engaged Capital Offshore II, as feeder funds of Engaged Capital Master II, may be deemed to beneficially own the 536,752 Shares owned by Engaged Capital Master II, constituting approximately 1.0% of the Shares outstanding.

CUSIP NO. 928645100

As of the close of business on September 26, 2014, Pulse LP beneficially owned 1,640,612 Shares, constituting approximately 3.2% of the Shares outstanding. Pulse Ltd., as a feeder fund of Pulse LP, may be deemed to beneficially own the 1,640,612 Shares owned by Pulse LP, constituting approximately 3.2% of the Shares outstanding.

Engaged Capital, as the general partner and investment adviser of Engaged Capital Master I, Engaged Capital Master II and Pulse LP, may be deemed to beneficially own the 2,638,403 Shares owned in the aggregate by Engaged Capital Master I, Engaged Capital Master II and Pulse LP, constituting approximately 5.1% of the Shares outstanding. Engaged Holdings, as the managing member of Engaged Capital, may be deemed to beneficially own the 2,638,403 Shares owned in the aggregate by Engaged Capital Master I, Engaged Capital Master II and Pulse LP, constituting approximately 5.1% of the Shares outstanding. Mr. Welling, as the managing member and CIO of Engaged Capital and sole member of Engaged Holdings, may be deemed to beneficially own the 2,638,403 Shares owned in the aggregate by Engaged Capital Master I, Engaged Capital Master II and Pulse LP, constituting approximately 5.1% of the Shares outstanding.

(b) By virtue of their respective positions with Engaged Capital Master I, each of Engaged Capital I, Engaged Capital Offshore, Engaged Capital, Engaged Holdings and Mr. Welling may be deemed to have sole power to vote and dispose of the Shares reported owned by Engaged Capital Master I.

By virtue of their respective positions with Engaged Capital Master II, each of Engaged Capital II, Engaged Capital Offshore II, Engaged Capital, Engaged Holdings and Mr. Welling may be deemed to have sole power to vote and dispose of the Shares reported owned by Engaged Capital Master II.

By virtue of their respective positions with Pulse LP, each of Pulse Ltd., Engaged Capital, Engaged Holdings and Mr. Welling may be deemed to have sole power to vote and dispose of the Shares reported owned by Pulse LP.

Each Reporting Person, as a member of a “group” with the other Reporting Persons for the purposes of Section 13(d)(3) of the Securities Exchange Act of 1934, as amended, may be deemed the beneficial owner of the Shares directly owned by the other Reporting Persons. Each Reporting Person disclaims beneficial ownership of such Shares except to the extent of his or its pecuniary interest therein.

(c) Schedule B annexed hereto lists all transactions in securities of the Issuer by the Reporting Persons during the past 60 days.

Item 6.

Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.

Item 6 is hereby amended and restated to read as follows:

Engaged Capital Master I purchased in the over the counter market American-style call options referencing an aggregate of 323,044 Shares, which have an exercise price of $14.6277 per Share and expire on December 31, 2014. Engaged Capital Master I sold in the over the counter market European-style put options referencing an aggregate of 323,044 Shares at an exercise price of $14.6277 per Share, which expire on December 31, 2014.

CUSIP NO. 928645100

Engaged Capital Master II purchased in the over the counter market American-style call options referencing an aggregate of 272,956 Shares, which have an exercise price of $14.6277 per Share and expire on December 31, 2014. Engaged Capital Master II sold in the over the counter market European-style put options referencing an aggregate of 272,956 Shares at an exercise price of $14.6277 per Share, which expire on December 31, 2014.

On September 29, 2014 the Reporting Persons entered into a Joint Filing Agreement in which the Reporting Persons agreed to the joint filing on behalf of each of them of statements on Schedule 13D with respect to the securities of the Issuer to the extent required by applicable law. The Joint Filing Agreement is attached hereto as Exhibit 99.2 and is incorporated herein by reference.

Other than as described herein, there are no contracts, arrangements, understandings or relationships among the Reporting Persons, or between the Reporting Persons and any other person, with respect to the securities of the Issuer.

Item 7.

Material to be Filed as Exhibits.

Item 7 is hereby amended to add the following exhibits:

99.1

Letter to the Board, dated September 29, 2014.

99.2

Joint Filing Agreement by and among Engaged Capital Master Feeder I, LP, Engaged Capital Master Feeder II, LP, Pulse LP, Engaged Capital I, LP, Engaged Capital I Offshore, Ltd., Engaged Capital II, LP, Engaged Capital II Offshore Ltd., Pulse Ltd., Engaged Capital, LLC, Engaged Capital Holdings, LLC and Glenn W. Welling, dated September 29, 2014.

CUSIP NO. 928645100

SIGNATURES

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

Dated: September 29, 2014

Engaged Capital Master Feeder I, LP

By:	Engaged Capital, LLC General Partner

By:	/s/ Glenn W. Welling
	Name:	Glenn W. Welling
	Title:	Managing Member and Chief Investment Officer

Engaged Capital Master Feeder II, LP

By:	Engaged Capital, LLC General Partner

By:	/s/ Glenn W. Welling
	Name:	Glenn W. Welling
	Title:	Managing Member and Chief Investment Officer

Pulse LP

By:	Engaged Capital, LLC General Partner

By:	/s/ Glenn W. Welling
	Name:	Glenn W. Welling
	Title:	Managing Member and Chief Investment Officer

Engaged Capital I, LP

By:	Engaged Capital, LLC General Partner

By:	/s/ Glenn W. Welling
	Name:	Glenn W. Welling
	Title:	Managing Member and Chief Investment Officer

Engaged Capital I Offshore, Ltd.

By:	/s/ Glenn W. Welling
	Name:	Glenn W. Welling
	Title:	Director

Engaged Capital II, LP

By:	Engaged Capital, LLC General Partner

By:	/s/ Glenn W. Welling
	Name:	Glenn W. Welling
	Title:	Managing Member and Chief Investment Officer

Engaged Capital II Offshore Ltd.

By:	/s/ Glenn W. Welling
	Name:	Glenn W. Welling
	Title:	Director

Pulse Ltd.

By:	Engaged Capital, LLC Investment Adviser

By:	/s/ Glenn W. Welling
	Name:	Glenn W. Welling
	Title:	Managing Member and Chief Investment Officer

Engaged Capital, LLC

By:	/s/ Glenn W. Welling
	Name:	Glenn W. Welling
	Title:	Managing Member and Chief Investment Officer

Engaged Capital Holdings, LLC

By:	/s/ Glenn W. Welling
	Name:	Glenn W. Welling
	Title:	Sole Member

	/s/ Glenn W. Welling
	Glenn W. Welling

CUSIP NO. 928645100

SCHEDULE A

Directors and Officers of Engaged Capital I Offshore, Ltd. and Engaged Capital II Offshore Ltd.

Name and Position	Principal Occupation	Principal Business Address	Citizenship

Glenn W. Welling Director*
Mark John Cook Director	Company Director	3rd Floor, Harbour Centre George Town, Grand Cayman Cayman Islands	Australia

Mark Victor Murray Director	Company Director	2F Landmark Square 64 Earth Close Seven Mile Beach Grand Cayman Cayman Islands	United Kingdom & British Overseas Territory Citizen (Cayman Islands)

Directors and Officers of Pulse Ltd.

Name and Position	Principal Occupation	Principal Business Address	Citizenship

Martin Laidlaw Director	Company Director	Ground Floor, Windward 1 Regatta Office Park West Bay Road Grand Cayman KY1-1201 Cayman Islands	United Kingdom & British Overseas Territory Citizen (Cayman Islands)
John Ackerley Director	Company Director	Grand Pavilion Commercial Centre 802 West Bay Road Grand Cayman KY1-1204 Cayman Islands	United Kingdom

GCM Fiduciary Services LLC Director	Company Director	900 North Michigan Avenue Suite 1100 Chicago, Illinois 60611	Delaware

____________________

*Mr. Welling is a Reporting Person and, as such, the information with respect to Mr. Welling called for by Item 2 of Schedule 13D is set forth therein.

CUSIP NO. 928645100

SCHEDULE B

Transactions in Securities of the Issuer During the Past Sixty Days

Nature of the Transaction

Securities

Purchased/(Sold)

Price Per

Share($)

Date of

Purchase / Sale

ENGAGED CAPITAL MASTER FEEDER II, LP

Purchase of Common Stock

25,000

16.4576

08/01/2014

Volcano (VOLC) Inactive SC 13D/AVolcano Corp