SC TO-T/A

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE TO

(RULE 14d-100)

Tender Offer Statement Pursuant to Section 14(d)(1) or 13(e)(1)

of the Securities Exchange Act of 1934 (Amendment No. 6)

VOLCANO CORPORATION

(Name of Subject Company (Issuer))

CLEARWATER MERGER SUB, INC.,

a wholly owned subsidiary of

PHILIPS HOLDING USA INC.,

a wholly owned subsidiary of

KONINKLIJKE PHILIPS N.V.

(Names of Filing Persons (Offerors))

Common Stock, par value $0.001

(Title of Class of Securities)

928645100

(Cusip Number of Class of Securities)

Joseph E. Innamorati

Clearwater Merger Sub, Inc.

3000 Minuteman Road

Andover, MA 01810

(978) 687-1501

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications on Behalf of Filing Persons)

Copies to:

Matthew G. Hurd

Rita-Anne O’Neill

Sullivan & Cromwell LLP

1888 Century Park East, Suite 2100

Los Angeles, CA 90067

(310) 712-6600

CALCULATION OF FILING FEE

Transaction Valuation*	Amount of Filing Fee**
$1,266,918,102	$147,215.88

* Estimated solely for purposes of calculating the filing fee. The transaction value calculation does not take into account the effect of any cash received or deemed received by Volcano Corporation (the “Company”) in connection with the exercise of any outstanding equity awards. The transaction value was determined by multiplying (a) $18.00, the tender offer price, by (b) the sum of (i) 51,610,342, the number of issued and outstanding shares of Company common stock, (ii) 2,798,233, the number of shares of Company common stock subject to issuance pursuant to options to purchase shares of Company common stock, (iii) 87,525, the number of shares of Company common stock estimated to be subject to outstanding purchase rights under the Volcano employee stock purchase plan (assuming that the closing price per share of Company common stock as reported on the purchase date for the current offering period was equal to the tender offer price), (iv) 1,033,139, the number of shares of Company common stock subject to or otherwise deliverable in connection with restricted stock units of the Company, and (v) 14,855,100, the number of shares of Company common stock subject to issuance pursuant to outstanding warrants. The foregoing share figures have been provided by the issuer to the offerors and are as of December 15, 2014.

** The filing fee was calculated in accordance with Rule 0-11 under the Securities Exchange Act of 1934, as amended, and Fee Rate Advisory No. 1 for Fiscal Year 2015, issued August 29, 2014, by multiplying the transaction value by 0.0001162.

x  Check box if any part of the fee is offset as provided by Rule 0-11(a)(2) and identify the filing with which the offsetting fee was previously paid. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.

Amount Previously Paid:	$147,215.88	Filing Party:	Clearwater Merger Sub, Inc.
Form or Registration No.:	Schedule TO	Date Filed:	December 30, 2014

¨  Check the box if the filing relates solely to preliminary communications made before the commencement of a tender offer.

Check the appropriate boxes below to designate any transactions to which the statement relates:

x  third-party tender offer subject to Rule 14d-1.

¨  issuer tender offer subject to Rule 13e-4.

¨  going-private transaction subject to Rule 13e-3

¨  amendment to Schedule 13D under Rule 13d-2.

Check the following box if the filing is a final amendment reporting the results of the tender offer.  ¨

If applicable, check the appropriate box(es) below to designate the appropriate rule provision(s) relied upon:

¨ Rule 13e-4(i) (Cross-Border Issuer Tender Offer)

¨ Rule 14d-1(d) (Cross-Border Third-Party Tender Offer)

This Amendment No. 6 to the Tender Offer Statement on Schedule TO amends and supplements the Tender Offer Statement on Schedule TO filed with the Securities Exchange Commission on December 30, 2014 (together with any amendments and supplements thereto, the “Schedule TO”) by Clearwater Merger Sub, Inc., a Delaware corporation (“Purchaser”) and wholly owned subsidiary of Philips Holding USA Inc., a Delaware corporation (“Parent”) and a wholly owned subsidiary of Koninklijke Philips N.V., a corporation organized under the laws of The Netherlands (“Royal Philips”). The Schedule TO relates to the offer by Purchaser to purchase all of the shares of common stock, par value $0.001 per share, of Volcano Corporation, a Delaware corporation (the “Company”), including any associated rights to purchase capital stock issued pursuant to the Rights Agreement, dated June 20, 2006, by and between the Company and American Stock Transfer & Trust Company (such rights, together with such shares of the Company’s common stock, the “Shares”), that are issued and outstanding at a price of $18.00 per Share net to the seller in cash, without interest and subject to any applicable withholding of taxes, upon the terms and subject to the conditions set forth in the offer to purchase, dated December 30, 2014 (the “Offer to Purchase”), and in the related Letter of Transmittal (which, together with any amendments or supplements thereto, collectively constitute the “Offer”).

All capitalized terms used in this Amendment No. 6 and not otherwise defined have the respective meanings ascribed to them in the Schedule TO.

Items 1 through 9; Item 11.

The Offer to Purchase and Items 1 through 9 and Item 11 of the Schedule TO are hereby amended and supplemented as follows:

All references to “12:00 midnight, Eastern time, on February 5, 2015 (one minute after 11:59 P.M., Eastern time, on February 4, 2015)” as the “Expiration Date” are hereby amended to refer to “9:00 a.m., Eastern time, on February 17, 2015.”

On February 5, 2015, Royal Philips issued a press release announcing the extension of the Expiration Date to February 17, 2015. A copy of the press release is filed as Exhibit (a)(5)(xiii) to the Schedule TO and is incorporated herein by reference.

Item 12. Exhibits.

Item 12 of the Schedule TO is hereby amended and supplemented by adding the following exhibits:

Index No.
(a)(5)(xiii)	Press Release issued by Royal Philips, dated February 5, 2015.
99.1	Power of Attorney dated as of January 12, 2015.*

* As previously filed.

SIGNATURE

After due 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.

Dated: February 5, 2015

CLEARWATER MERGER SUB, INC.
By:	/s/ Joseph E. Innamorati
	Name: Joseph E. Innamorati
	Title: Vice President and Secretary

PHILIPS HOLDING USA INC.
By:	/s/ Joseph E. Innamorati
	Name: Joseph E. Innamorati
	Title: Senior Vice President and Secretary

KONINKLIJKE PHILIPS N.V.
By:	/s/ Joseph E. Innamorati
	Name: Joseph E. Innamorati
	Title: Attorney in Fact

EXHIBIT INDEX

Index No.
(a)(5)(xiii)	Press Release issued by Royal Philips, dated February 5, 2015.
99.1	Power of Attorney dated as of January 12, 2015.*

* As previously filed.

EX-99.(A)(5)(XIII)

Exhibit (a)(5)(xiii)

Press Information

February 5, 2015

Philips extends tender offer period to acquire Volcano

Amsterdam, the Netherlands and San Diego, CA, US – Royal Philips (NYSE: PHG; AEX: PHIA) and Volcano Corporation (NASDAQ:VOLC) today announced that Philips’ indirect wholly owned subsidiary Clearwater Merger Sub, Inc. is extending the expiration date for its previously announced tender offer until 9:00 a.m., Eastern Time, on February 17, 2015, for all outstanding shares of common stock of Volcano for USD 18.00 per Volcano share, without interest, less any applicable withholding of taxes.

On December 30, 2014, Clearwater Merger Sub commenced the tender offer for the Volcano shares in accordance with the Agreement and Plan of Merger, dated as of December 16, 2014, by and among Volcano, Philips Holding USA Inc. and Clearwater Merger Sub, Inc. (“Purchaser”). The offer is being extended because, as of 12:00 midnight, Eastern Time, on February 5, 2015, the condition (the “Taiwan Regulatory Condition”) to the tender offer regarding the clearance by the Taiwan Fair Trade Commission (“TFTC”) pursuant to Article 11 of the Fair Trade Act of Taiwan had not been satisfied. The formal notification under such act was submitted on December 29, 2014 and a supplemental filing was submitted on January 15, 2015.

Philips currently expects the Taiwan Regulatory Condition to be satisfied on or prior to midnight, local Taiwan time, on February 14, 2015 (one minute after 11:59 p.m., local Taiwan time, on February 13, 2015). All other applicable regulatory clearances have already been satisfied.

As of 12:00 midnight, Eastern Time, on February 5, 2015, Purchaser had received a preliminary number of tenders representing approximately 49,535,143 of the outstanding Volcano shares (including 2,725,277 Volcano shares tendered pursuant to guaranteed delivery procedures), which represented approximately 95.7 percent of the outstanding Volcano shares.

For further information, please contact:

Philips:

Steve Klink

Philips Group Communications

Tel.: +31 6 1088 8824

E-mail: steve.klink@philips.com

Joost Akkermans

Philips Group Communications

Tel: +31 6 3175 8996

E-mail: joost.akkermans@philips.com

Vanessa Bruinsma-Kleijkers

Philips Investor Relations

Phone: +31 20 5977447

Email: investor.relations@philips.com

Leandro Mazzoni

Philips Investor Relations

Phone: +31 20 5977055

Email: investor.relations@philips.com

Volcano:

Jacquie Keller

Media Relations, Volcano Corporation

Tel: +1 858-720-4142

Email: jkeller@Volcanocorp.com

About Royal Philips

Royal Philips (NYSE: PHG, AEX: PHIA) is a diversified health and well-being company, focused on improving people’s lives through meaningful innovation in the areas of Healthcare, Consumer Lifestyle and Lighting. Headquartered in the Netherlands, Philips posted 2013 sales of EUR 23.3 billion and employs approximately 115,000 employees with sales and services in more than 100 countries. The company is a leader in cardiac care, acute care and home healthcare, energy efficient lighting solutions and new lighting applications, as well as male shaving and grooming and oral healthcare. News from Philips is located at www.philips.com/newscenter.

About Volcano Corporation

Through its multi-modality platform, Volcano is the global leader in intravascular imaging for coronary and peripheral therapeutic devices. The company’s broad range of technologies makes imaging and therapy simpler, more informative and less invasive and offers physicians and their patients around the world with industry-leading tools that aid diagnosis and guide and provide therapy. Founded in cardiovascular care and expanding into other specialties, Volcano is focused on improving patient and economic outcomes. For more information, visit the company’s website at www.Volcanocorp.com.

Forward-looking statements

This release may contain certain forward-looking statements with respect to the financial condition, results of operations and business of Philips and certain of the plans and objectives of Philips with respect to these items, including without limitation completion of the tender offer and merger and any expected benefits of the merger, and certain forward-looking statements regarding Volcano, including without limitation with respect to its business, the

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proposed tender offer and merger, the expected timetable for completing the transaction, and the strategic and other potential benefits of the transaction. Completion of the tender offer and merger are subject to conditions, including satisfaction of a minimum tender condition and the need for regulatory approvals, and there can be no assurance that those conditions can be satisfied or that the transactions described in this release (the “Transactions”) will be completed or will be completed when expected. Often, but not always, forward-looking statements can be identified by the use of words such as “plans,” “expects,” “expected,” “scheduled,” “estimates,” “intends,” “anticipates,” “projects,” “potential,” “continues” or “believes,” or variations of such words and phrases or state that certain actions, events, conditions, circumstances or results “may,” “could,” “should,” “would,” “might” or “will” be taken, occur or be achieved. By their nature, forward-looking statements involve risk and uncertainty because they relate to events and depend on circumstances that will occur in the future and there are many factors that could cause actual results and developments to differ materially from those expressed or implied by these forward-looking statements. These factors include, but are not limited to, (i) the risk that not all conditions of the Offer or the merger will be satisfied or waived; (ii) uncertainties regarding the two companies’ ability to successfully market both new and existing products; (iii) uncertainties relating to the anticipated timing of filings and approvals relating to the Transactions; (iv) uncertainties as to the timing of the tender offer and merger; (v) uncertainties as to how many of Volcano’s stockholders will tender their stock in the tender offer; (vi) the possibility that competing offers will be made; (vii) the failure to complete the tender offer or the merger in the timeframe expected by the parties or at all; (viii) the outcome of legal proceedings that may be instituted against Volcano and/or others relating to the Transactions; (ix) Volcano’s ability to maintain relationships with employees, customers, or suppliers; (x) domestic and global economic and business conditions; (xi) developments within the euro zone; (xii) the successful implementation of Philips’ strategy and the ability to realize the benefits of this strategy; (xiii) legal claims; (xiv) changes in exchange and interest rates; (xv) changes in tax rates, raw materials and employee costs; (xvi) the ability to successfully exit certain businesses or restructure the operations; (xvii) the rate of technological changes; (xviii) political, economic and other developments in countries where Philips operates; (xix) industry consolidation and competition; and (xx) other risk factors described in Volcano’s Annual Report on Form 10-K and Quarterly Reports on Form 10-Q filed with the United States Securities and Exchange Commission (“SEC”). Any forward-looking statements in this release are based upon information known to Philips on the date of this announcement. Neither Philips nor Volcano undertakes any obligation to publicly update or revise any forward-looking statement, whether as a result of new information, future events or otherwise.

Additional Information

This communication is neither an offer to purchase nor a solicitation of an offer to sell any shares of common stock of Volcano or any other securities. Philips has filed a tender offer statement on Schedule TO with the SEC and a Solicitation/Recommendation Statement on Schedule 14D-9 has been filed with the SEC by Volcano. The offer to purchase shares of Volcano common stock will only be made pursuant to the offer to purchase, the letter of transmittal and related documents filed as a part of the Schedule TO. INVESTORS AND SECURITY HOLDERS ARE URGED TO READ BOTH THE TENDER OFFER STATEMENT, AS FILED AND AS IT MAY BE AMENDED FROM TIME TO TIME, AND THE SOLICITATION/ RECOMMENDATION STATEMENT, AS FILED AND AS MAY BE AMENDED FROM TIME TO TIME,

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BECAUSE THEY CONTAIN IMPORTANT INFORMATION REGARDING THE OFFER. Investors and security holders may obtain a free copy of these statements and other documents filed with the SEC at the website maintained by the SEC at www.sec.gov or by directing such requests to Georgeson Inc., the Information Agent for the offer, at (866) 856-2826.

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