SC TO-T/A

SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

AMENDMENT NO. 3 TO
SCHEDULE TO
(Rule 14d-100)

TENDER OFFER STATEMENT PURSUANT TO SECTION 14(d)(1)
OF THE SECURITIES EXCHANGE ACT OF 1934

DADE BEHRING HOLDINGS, INC.
(Name of Subject Company (Issuer))

Belfast Merger Co.
a wholly-owned subsidiary of
Siemens Corporation
an indirect, wholly-owned subsidiary of
SIEMENS AKTIENGESELLSCHAFT
(Name of Filing Persons (Offeror))

Common Stock, $0.01 par value
(Title of Class of Securities)

23342J206
(CUSIP Number of class of securities)

Kevin M. Royer
Siemens Corporation
153 East 53rd Street
New York, New York 10022
(212) 258-4000
(Name, Address and Telephone No. of Person Authorized to Receive
Notices and Communications on Behalf of Filing Persons)

with a copy to:

John A. Healy
Clifford Chance US LLP
31 West 52nd Street
New York, New York 10019
(212) 878-8000

Calculation of Filing Fee

Transaction Valuation	Amount of Filing Fee*
$6,753,554,654	$207,348

*  Previously paid.

[_] Check the box if the filing relates solely to preliminary communications made before 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: [_]

AMENDMENT NO. 3 TO SCHEDULE TO

          This Amendment No. 3 amends and supplements the Tender Offer Statement on Schedule TO filed with the Securities and Exchange Commission on August 8, 2007 (the “Schedule TO”), relating to the offer by Belfast Merger Co., a Delaware corporation (“Purchaser”), which is a wholly-owned subsidiary of Siemens Corporation, a Delaware corporation (“Parent”), which is an indirect, wholly-owned subsidiary of Siemens Aktiengesellschaft, a corporation formed under the laws of the Federal Republic of Germany (“Siemens AG”), to purchase all of the outstanding shares of common stock, par value $0.01 per share (“Common Stock”), of Dade Behring Holdings, Inc., a Delaware corporation (the “Company”), together with the associated rights to purchase shares of Series A Junior Participating Preferred Stock (“Rights”) issued pursuant to the Rights Agreement, dated as of October 3, 2002, between the Company and Mellon Investor Services LLC, as Rights Agent (the Common Stock and the Rights together being referred to herein as the “Shares”), at a price of $77.00 per Share, net to the seller in cash, upon the terms and subject to the conditions set forth in the Offer to Purchase, dated August 8, 2007 (the “Offer to Purchase”), and in the related Letter of Transmittal. Except as otherwise provided herein, this Amendment No. 3 does not modify any of the information previously reported on the Schedule TO.

          The Schedule TO is hereby supplemented and/or amended as provided below.

          Item 11. Additional Information.

          Item 11 of the Schedule TO and the second paragraph of the subsection entitled “United States Antitrust Compliance” in Section 15 of the Offer to Purchase (“Certain Legal Matters”) are hereby amended and supplemented by adding the following:

          “Parent has been notified that its request for early termination of the waiting period applicable to the Offer under the HSR Act was granted and such waiting period was terminated, effective September 17, 2007. Accordingly, the condition to the Offer relating to material clearance or approval required pursuant to the HSR Act has been satisfied.”

          The press release issued by Parent announcing the expiration of the waiting period is attached hereto as Exhibit (a)(10).

          Item 12. Exhibits.

Item 12 of the Schedule TO is hereby amended by adding the following exhibit:

"(a)(10) Press release issued by Parent, dated September 18, 2007, announcing the termination of the waiting period under the HSR Act.”

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.

Date: September 18, 2007	BELFAST MERGER CO.   /s/ E. Robert Lupone
	Name: E. Robert Lupone Title: Authorized Representative
	/s/ Kenneth R. Meyers
	Name: Kenneth R. Meyers Title: Authorized Representative
	SIEMENS CORPORATION   /s/ E. Robert Lupone
	Name: E. Robert Lupone Title: Senior Vice President, General Counsel and Secretary
	/s/ Kenneth R. Meyers
	Name: Kenneth R. Meyers Title: Vice President, Mergers and Acquisitions
	SIEMENS AKTIENGESELLSCHAFT
	/s/ E. Robert Lupone
	Name: E. Robert Lupone Title: Authorized Representative
	/s/ Kenneth R. Meyers
	Name: Kenneth R. Meyers Title: Authorized Representative

EXHIBIT INDEX

Exhibit No.

(a)(1)	Offer to Purchase, dated August 8, 2007.*
(a)(2)	Form of Letter of Transmittal.*
(a)(3)	Form of Notice of Guaranteed Delivery.*
(a)(4)	Form of Guidelines for Certification of Taxpayer Identification Number on Substitute Form W-9.*
(a)(5)	Form of Letter to brokers, dealers, commercial banks, trust companies and other nominees.*
(a)(6)	Form of Letter to be used by brokers, dealers, commercial banks, trust companies and other nominees for their clients.*
(a)(7)	Summary newspaper advertisement published in The Wall Street Journal on August 8, 2007.*
(a)(8)	Press Release issued by Siemens AG on July 25, 2007 (incorporated by reference to Exhibit 99.1 filed under cover of Schedule TO by Siemens AG with the Securities and Exchange Commission on July 25, 2007).*
(a)(9)	Press Release issued by Siemens AG on September 5, 2007.*
(a)(10)	Press release issued by Parent, dated September 18, 2007, announcing the termination of the waiting period under the HSR Act.
(b)	None
(d)(1)	Agreement and Plan of Merger, dated as of July 25, 2007, by and among Parent, Purchaser and the Company (incorporated by reference to Exhibit 2.1 to the Current Report on Form 8-K filed by the Company with the Securities and Exchange Commission on July 26, 2007).*
(d)(2)	Confidentiality Agreement, dated May 22, 2007, between Siemens Medical Solutions USA, Inc. and the Company.*
(g)	None
(h)	None

* Previously filed.

EX-99.A.10

Exhibit (a)(10)

FOR IMMEDIATE RELEASE CONTACT: LuJean Smith
Siemens Medical Solutions
(610) 448-1473
lujean.smith@siemens.com

SIEMENS ANNOUNCES EARLY TERMINATION OF HART-SCOTT-RODINO
WAITING PERIOD FOR ACQUISITION OF DADE BEHRING HOLDINGS, INC.: U.S. ANTITRUST CLEARANCE ACHIEVED

     NEW YORK, September 18, 2007 — Siemens Corporation, a wholly owned subsidiary of Siemens AG (NYSE:SI), announced today that the statutory waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, applicable to its cash tender offer for all of the issued and outstanding shares of common stock of Dade Behring Holdings, Inc. (Nasdaq GS: DADE) has been terminated.

Siemens Corporation, through its wholly owned subsidiary Belfast Merger Co., commenced a tender offer on August 8, 2007 for all of the outstanding shares of common stock of Dade Behring for $77 per share, net to the seller in cash. On September 5, 2007, the tender offer was extended to 12:00 Midnight, New York City time, on Wednesday, September 26, 2007.

Siemens has submitted a draft of the required merger control filing with the European Commission and has since been in discussions with the authority. Siemens believes that it is possible that it might obtain competition law clearance, and therefore be able to close the transaction, during calendar 2007.

Following completion of the tender offer, any remaining shares of Dade Behring Holdings, Inc. will be acquired in a merger at the same price. The transaction is conditioned on, among other things, receipt of regulatory approvals and has a value of approximately $7 billion.

About Siemens

Siemens AG (NYSE: SI) (Berlin and Munich) is a global powerhouse in electrical engineering and electronics. The company has around 475,000 employees (incl. discontinued operations) working to develop and manufacture products, design and install complex systems and projects, and tailor a wide range of services for individual requirements. Siemens provides innovative technologies and comprehensive know-how to benefit customers in over 190 countries. Founded more than 160 years ago, the company focuses on the areas of Information and Communications, Automation and Control, Power, Transportation, Medical, and Lighting. In fiscal 2006 (ended September 30), Siemens had sales of €87.3 billion and net income of €3.033 billion, according to U.S. GAAP. Further information is available on the Internet at: www.siemens.com.

About Dade Behring

With 2006 revenue of more than US$1.7 billion, Dade Behring offers a wide range of products, systems and services designed to meet the day-to-day needs of clinical laboratories, delivering innovative solutions to customers and enhancing the quality of life for patients. Additional company information is available on the Internet at www.dadebehring.com.

This announcement is for informational purposes only and does not constitute an offer to purchase nor a solicitation of an offer to sell any securities. The Tender Offer Statement on Schedule TO, the Offer to Purchase and related materials filed by Siemens with the Securities and Exchange Commission (“SEC”) contain important information and should be read carefully before any decision is made with respect to the tender offer. These materials are available at no charge on the SEC’s web site (http://www.sec.gov) and requests for additional copies of such materials may be directed to Georgeson Inc., the Information Agent for the tender offer. The Information Agent can be reached at 17 State Street, 10th Floor, New York, New York 10004. Banks and brokers can call (212) 440-9800 and all others can call toll free at (888) 605-7608.

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