SC TO-T/A

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. 5)

BECKMAN COULTER, INC.

(Name of Subject Company)

DJANET ACQUISITION CORP.

DANAHER CORPORATION

(Names of Filing Persons — Offeror)

Common Stock, Par Value $0.10 Per Share

(Title of Class of Securities)

075811109

(Cusip Number of Class of Securities)

Jonathan P. Graham

Senior Vice President - General Counsel

James F. O’Reilly

Associate General Counsel and Secretary

2200 Pennsylvania Avenue, N.W., Suite 800W

Washington, D.C. 20037-1701

(202) 828-0850

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

Copies to:

Trevor S. Norwitz, Esq.

Wachtell, Lipton, Rosen & Katz

51 West 52nd Street

New York, New York 10019-6150

Telephone: (212) 403-1000

CALCULATION OF FILING FEE

Transaction Valuation*	Amount of Filing Fee**
$6,540,586,458.22	$759,362.09

* Estimated solely for purposes of calculating the amount of the filing fee. This amount is based on the offer to purchase all 78,330,377 outstanding shares of common stock of Beckman Coulter, Inc. (“Beckman Coulter”), calculated on a fully diluted basis per information provided by Beckman Coulter, at a purchase price of $83.50 cash per share, as of February 11, 2011, 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 0.00011610.

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:	$759,362.09.	Filing Party:	Danaher Corporation and Djanet Acquisition Corp.
Form or Registration No.:	Schedule TO.	Date Filed:	February 15, 2011.

¨ 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.  ¨

This Amendment No. 5 (the “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 February 15, 2011, as amended on March 2, 2011, March 9, 2011, March 23, 2011 and April 18, 2011, and is filed by (i) Djanet Acquisition Corp., a Delaware corporation (“Purchaser”) and an indirect wholly owned subsidiary of Danaher Corporation, a Delaware corporation (“Danaher”), and (ii) Danaher. The Schedule TO relates to the tender offer for all of the outstanding shares of common stock, par value $0.10 per share (the “Shares”), of Beckman Coulter, Inc., a Delaware corporation (“Beckman Coulter”), at a price of $83.50 per Share, net to the seller in cash, without interest and less any applicable withholding taxes, upon the terms and subject to the conditions set forth in the Offer to Purchase, dated February 15, 2011 (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. 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.

Items 1 and 4.     Summary Term Sheet; Terms of the Transaction

Item 1 and Item 4 ((a)(iii)) of the Schedule TO are hereby amended and supplemented as follows:

The information set forth in the sections of the Offer to Purchase entitled “Summary Term Sheet” and “Introduction” and in Section 1—“Terms of the Offer” is hereby amended and supplemented by inserting the following paragraph:

“On April 20, 2011, Purchaser announced an extension of the expiration of the Offer until 12:00 midnight, New York City time, at the end of June 6, 2011, unless further extended. The Offer was previously scheduled to expire at 12:00 midnight, New York City time, at the end of Wednesday, April 27, 2011, and Danaher, Purchaser and Beckman Coulter have mutually agreed to this extension of the Offer. The Depositary has indicated that, as of 4:00 p.m., New York City time, on April 20, 2011, approximately 26,640,299 Shares had been validly tendered and not withdrawn pursuant to the Offer. The transaction is anticipated to close in June 2011. The press release announcing the extension of the Offer is attached hereto as Exhibit (a)(5)(F).”

Item 12. Exhibits.

Item 12 of the Schedule TO is hereby amended and supplemented as follows:

“(a)(5)(F) Press Release issued by Danaher Corporation on April 20, 2011.”

SIGNATURES

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

Date: April 20, 2011

Djanet Acquisition Corp.
By:	/s/ Robert S. Lutz
	Name: Robert S. Lutz
	Title: Vice President, Treasurer and Secretary

Danaher Corporation
By:	/s/ Robert S. Lutz
	Name: Robert S. Lutz
	Title: Senior Vice President – Chief Accounting Officer

EXHIBIT INDEX

Exhibit No.	Description
(a)(1)(A)	Offer to Purchase dated February 15, 2011.*
(a)(1)(B)	Letter of Transmittal (including Form W-9).*
(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 February 15, 2011.*
(a)(5)(A)	Press Release issued by Danaher Corporation on February 7, 2011 (incorporated in this Schedule TO by reference to the Current Report on Form 8-K filed by Danaher Corporation on February 7, 2011).*
(a)(5)(B)	Transcript of Investor Call held February 7, 2011 regarding announcement of Merger Agreement (incorporated in this Schedule TO by reference to the Schedule TO-C filed by Danaher Corporation on February 8, 2011).*
(a)(5)(C)	Investor Presentation (incorporated in this Schedule TO by reference to the Schedule TO-C filed by Danaher Corporation on February 9, 2011).*
(a)(5)(D)	Joint Press Release issued by Danaher Corporation and Beckman Coulter, Inc. on March 9, 2011.*
(a)(5)(E)	Press Release issued by Danaher Corporation on March 22, 2011*
(a)(5)(F)	Press Release issued by Danaher Corporation on April 20, 2011**
(b)	Not applicable.
(c)	Not applicable.
(d)(1)	Agreement and Plan of Merger dated as of February 6, 2011 among Danaher Corporation, Djanet Acquisition Corp. and Beckman Coulter, Inc. (incorporated in this Schedule TO by reference to the Current Report on Form 8-K filed by Danaher Corporation on February 10, 2011).*
(d)(2)	Confidentiality Agreement dated as of November 16, 2010 between Beckman Coulter, Inc. and Danaher Corporation.*
(e)	Not applicable.
(f)	Not applicable.
(g)	Not applicable.
(h)	Not applicable.

* Previously filed.

** Filed herewith.

EX-99.A.5.F

Exhibit (a)(5)(F)

Danaher Extends Cash Tender Offer for Beckman Coulter

Washington, D.C. April 20, 2011 – Danaher Corporation (NYSE:DHR) announced today that its previously announced tender offer to acquire all of the outstanding shares of Beckman Coulter, Inc. (NYSE: BEC) for $83.50 per share in cash (“the Offer”) has been extended and will now expire at 12:00 midnight, New York City time, at the end of June 6, 2011, unless further extended. All other terms and conditions of the Offer remain unchanged, and Danaher anticipates completing the acquisition in June 2011.

The transaction is subject to the satisfaction of customary closing conditions, including receipt of remaining applicable regulatory approvals. As previously announced, the parties received early termination of the waiting period required under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 (as amended), and Danaher is in the process of seeking similar clearances under antitrust and competition laws of other jurisdictions. As of 4:00 p.m., New York City time, on April 20, 2011, approximately 26,640,299 shares of Beckman Coulter common stock had been validly tendered into and not withdrawn from the Offer.

About Danaher

Danaher Corporation is a diversified technology leader that designs, manufactures, and markets innovative products and services to professional, medical, industrial, and commercial customers. Its portfolio of premier brands is among the most highly recognized in each of the markets it serves. Driven by a foundation provided by the Danaher Business System, Danaher’s 48,000 associates serve customers in more than 125 countries and generated $13.2 billion of revenue in 2010. For more information please visit Danaher’s website: www.danaher.com.

Notice to Investors

This announcement is neither an offer to purchase nor a solicitation of an offer to sell securities. The tender offer is being made pursuant to a tender offer statement on Schedule TO filed by Danaher with the SEC on February 15, 2011, as amended through the date of this release. Beckman Coulter has filed a solicitation/recommendation statement on Schedule 14D-9 with respect to the tender offer on February 15, 2011, as amended through the date of this release. The tender offer statement (including an offer to purchase, a related letter of transmittal and other tender offer documents) and the solicitation/recommendation statement contain important information that should be read carefully before making any decision to tender securities in the tender offer. Beckman Coulter stockholders may obtain a free copy of these materials (and all other tender offer documents filed with the SEC) on the SEC’s website: www.sec.gov. The Schedule TO (including the offer to purchase and related materials) and the Schedule 14D-9 (including the solicitation/recommendation statement) may also be obtained for free by contacting Okapi Partners LLC, the information agent for the tender offer, at (877) 274-8654.

Forward Looking Statements

Statements in this release that are not strictly historical, including statements regarding the proposed acquisition, the expected timetable for receiving regulatory approvals and completing the transaction, and any other statements regarding events or developments that we believe or anticipate will or may occur in the future, may be “forward-looking” statements within the meaning of the federal securities laws, and involve a number of risks and uncertainties. There are a number of important factors that could cause actual events to differ materially from those suggested or indicated by such forward-looking statements and you should not place undue reliance on any such forward-looking statements. These factors include risks and uncertainties related to, among other things: general economic conditions and conditions affecting the industries in which Danaher and Beckman Coulter operate; the uncertainty of regulatory approvals; the parties’ ability to satisfy the tender offer and merger agreement conditions and consummate the transaction; and Beckman Coulter’s performance and maintenance of important business relationships. Additional information regarding the factors that may cause actual results to differ materially from these forward-looking statements is available in Danaher’s SEC filings, including Danaher’s Annual Report on Form 10-K for the year ended December 31, 2010, as well as Beckman Coulter’s SEC filings, including Beckman Coulter’s Annual Report on Form 10-K for the year ended December 31, 2010. These forward-looking statements speak only as of the date of this release and neither Danaher nor Beckman Coulter assumes any obligation to update or revise any forward-looking statement, whether as a result of new information, future events and developments or otherwise, except as required by law.

Contact

Matt R. McGrew

Vice President, Investor Relations

Danaher Corporation

2200 Pennsylvania Avenue, N.W., Suite 800W

Washington, D.C. 20037

Telephone: (202) 828-0850

Fax: (202) 419-7676