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UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
 
SCHEDULE TO
Tender Offer Statement under Section 14(d)(1) or 13(e)(1) of
the Securities Exchange Act of 1934
(Amendment No. 4)
 
DIONEX CORPORATION
(Name of Subject Company)
 
WESTON D MERGER CO.
THERMO FISHER SCIENTIFIC INC.
(Names of Filing Persons — Offeror)
Common Stock, Par Value $0.001 Per Share
(Title of Class of Securities)
254546104
(Cusip Number of Class of Securities)
Seth H. Hoogasian
Senior Vice President, General Counsel and Secretary
Thermo Fisher Scientific Inc.
81 Wyman Street
Waltham, Massachusetts 02451
(781) 622-1000
(Name, Address and Telephone Number of Person Authorized to Receive Notices
and Communications on Behalf of Filing Persons)
 
Copies to:
Matthew M. Guest, Esq.
Wachtell, Lipton, Rosen & Katz
51 West 52nd Street
New York, New York 10019
Telephone: (212) 403-1000
 
CALCULATION OF FILING FEE
               
 
  Transaction Valuation*     Amount of Filing Fee**    
 
$2,271,379,560
     $ 161,949.36      
 
 
*   Estimated for purposes of calculating the filing fee only. This amount is based on the offer to purchase all 19,167,760 outstanding shares of common stock of Dionex Corporation at a purchase price of $118.50 cash per share, as of November 30, 2010, the most recent practicable date.
 
**   The amount of the filing fee is calculated in accordance with Rule 0-11 of the Securities Exchange Act of 1934, as amended, by multiplying the transaction valuation by 0.00007130.
 
þ   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:
  $ 161,949.36.     Filing Party:   Thermo Fisher Scientific Inc. and Weston D. Merger Co.
 
Form or Registration No.:
  Schedule TO.   Date Filed:   December 20, 2010.
o 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:
þ third-party tender offer subject to Rule 14d-1.
o issuer tender offer subject to Rule 13e-4.
o going-private transaction subject to Rule 13e-3.
o 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. o
 
 

 

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Item 7
Item 12
SIGNATURES
EXHIBIT INDEX
EX-99.a.5.H
EX-99.a.5.I

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     This Amendment No. 4 (this “Amendment”) amends and supplements the Tender Offer Statement on Schedule TO (together with any amendments and supplements thereto, the “Schedule TO”) filed with the Securities and Exchange Commission (the “SEC”) on December 20, 2010, as amended on January 10, 2011, January 14, 2011, and February 2, 2011, and is filed by (i) Weston D Merger Co., a Delaware corporation (“Purchaser”) and an indirect wholly-owned subsidiary of Thermo Fisher Scientific Inc., a Delaware corporation (“Thermo Fisher”), and (ii) Thermo Fisher. The Schedule TO relates to the tender offer for all of the outstanding shares of common stock, par value $0.001 per share (the “Shares”), of Dionex Corporation, a Delaware corporation (“Dionex”), at a price of $118.50 per Share, net to the seller in cash, without interest, upon the terms and subject to the conditions set forth in the Offer to Purchase dated December 20, 2010 (the “Offer to Purchase”), and in the related Letter of Transmittal (the “Letter of Transmittal”), copies of which were filed with the Schedule TO as Exhibits (a)(1)(A) and (a)(1)(B), respectively (which, together with any amendments or supplements thereto, collectively constitute the “Offer”).
     The information in the Offer to Purchase and the Letter of Transmittal is incorporated in this Amendment by reference to all of the applicable items in the Schedule TO, except that such information is amended and supplemented to the extent specifically provided in this Amendment No. 4. Capitalized terms used and not otherwise defined in this Amendment shall have the meanings assigned to such terms in the Offer to Purchase or in the Schedule TO.
Item 7.
Item 7 of the Schedule TO is hereby amended and supplemented as follows:
     “Senior Notes Offering. On February 14, 2011, Thermo Fisher announced that it had commenced and subsequently priced a registered offering (the “Notes Offering”) of $300 million aggregate principal amount of 2.050% Senior Notes due 2014 (the “2014 notes”), $900 million aggregate principal amount of 3.200% Senior Notes due 2016 (the “2016 notes”) and $1 billion aggregate principal amount of 4.500% Senior Notes due 2021 (the “2021 notes,” and together with the 2014 notes and 2016 notes, the “Notes”). Thermo Fisher intends to use the net proceeds of the Notes Offering to fund the consideration payable in, and certain costs associated with, the Offer and the Merger. Thermo Fisher intends to use the remaining net proceeds, if any, for general corporate purposes.
     The Notes Offering is not conditioned upon the completion of the Offer or the Merger, but, in the event that the Offer is not consummated on or before September 30, 2011 or the Merger Agreement is terminated any time prior thereto, Thermo Fisher will be required to redeem all of the Notes for a redemption price equal to 101% of the principal amount of the notes, subject to certain adjustments for interest payments due. Completion of the Offer is not conditioned upon obtaining or funding of any financing arrangements, including the consummation of the Notes Offering.
     The foregoing description of the Notes Offering shall not constitute an offer to sell or the solicitation of an offer to buy nor shall there be any sale of these securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction.”
Item 12.
Item 12 of the Schedule TO is hereby amended and supplemented as follows:
     
“(a)(5)(H)   Press Release issued by Thermo Fisher Scientific Inc., dated February 14, 2011.”
     
“(a)(5)(I)   Press Release issued by Thermo Fisher Scientific Inc., dated February 14, 2011.”

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SIGNATURES
     After due inquiry and to the best knowledge and belief of the undersigned, each of the undersigned certify that the information set forth in this statement is true, complete and correct.
         
  Weston D Merger Co.
 		  
  By:   /s/ Seth Hoogasian   
    Name:   Seth Hoogasian   
    Title:   President   
 
  Thermo Fisher Scientific Inc.
 		  
  By:   /s/ Seth Hoogasian    
    Name:   Seth Hoogasian   
    Title:   Senior Vice President, General Counsel and Secretary   
 
Date: February 14, 2011

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EXHIBIT INDEX
         
Exhibit No.   Description
 
  (a)(1)(A)   Offer to Purchase dated December 20, 2010.*
 
        
 
  (a)(1)(B)   Letter of Transmittal.*
 
        
 
  (a)(1)(C)   Notice of Guaranteed Delivery.*
 
        
 
  (a)(1)(D)   Letter to Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees.*
 
        
 
  (a)(1)(E)   Letter to Clients for use by Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees.*
 
        
 
  (a)(1)(F)   Summary Advertisement dated December 20, 2010.*
 
        
 
  (a)(5)(A)   Joint Press Release issued by Thermo Fisher Scientific Inc. and Dionex Corporation on December 13, 2010 (incorporated by reference to Exhibit 99.1 to the Current Report on Form 8-K filed by Thermo Fisher Scientific Inc. on December 13, 2010).*
 
        
 
  (a)(5)(B)   Investor Presentation, dated December 13, 2010 (incorporated by reference to Exhibit 99.2 to the Current Report on Form 8-K filed by Thermo Fisher Scientific Inc. on December 13, 2010).*
 
        
 
  (a)(5)(C)   Transcript of Conference Call held December 13, 2010 (incorporated by reference to Exhibit 99.3 to the Current Report on Form 8-K filed by Thermo Fisher Scientific Inc. on December 13, 2010).*
 
        
 
  (a)(5)(D)   Letter to Dionex employees from Marc Casper, Chief Executive Officer of Thermo Fisher, dated December 13, 2010 (incorporated by reference to the Schedule 14D-9 filed by Dionex Corporation on December 13, 2010).*
 
        
 
  (a)(5)(E)   Press Release issued by Thermo Fisher Scientific Inc., dated January 10, 2011.*
 
        
 
  (a)(5)(F)   Press Release issued by Thermo Fisher Scientific Inc., dated January 14, 2011.*
 
        
 
  (a)(5)(G)   Excerpts from transcript of Conference Call held by Thermo Fisher Scientific Inc. on February 2, 2011 regarding Thermo Fisher Scientific Inc.’s fourth quarter and fiscal 2010 earnings release.*
 
        
 
  (a)(5)(H)   Press Release issued by Thermo Fisher Scientific Inc., dated February 14, 2011.**
 
        
 
  (a)(5)(I)   Press Release issued by Thermo Fisher Scientific Inc., dated February 14, 2011.**
 
        
 
  (b)   Commitment Letter dated as of December 12, 2010 among Thermo Fisher Scientific Inc., Barclays Bank PLC, JPMorgan Chase Bank, N.A. and J.P. Morgan Chase Manhattan Bank.*
 
        
 
  (c)   Not applicable.
 
        
 
  (d)   Agreement and Plan of Merger dated as of December 12, 2010 among Thermo Fisher Scientific Inc., Weston D Merger Co. and Dionex Corporation (incorporated by reference to the Form 8-K filed by Thermo Fisher Scientific Inc. on December 16, 2010).*
 
        
 
  (e)   Not applicable.
 
        
 
  (f)   Not applicable.
 
        
 
  (g)   Not applicable.
 
        
 
  (h)   Not applicable.
 
*   Previously filed.
 
**   Filed herewith.