Filed by: Bergen Brunswig Corporation. This Communication is filed pursuant to Rule 425 under The Securities Act of 1933, as amended, and deemed filed pursuant to Rule 14a-12 of the Securities Exchange Act of 1934. Subject Company: AmerisourceBergen Corporation Commission File Number: 333-61440 FORWARD-LOOKING STATEMENTS The following communications contain certain "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. These statements are based on management's current expectations and are subject to uncertainty and changes in circumstances. Actual results may vary materially from the expectations contained in the forward-looking statements. The forward-looking statements herein include statements addressing future financial and operating results of AmeriSource and Bergen Brunswig and the timing, benefits and other aspects of the proposed merger. The following factors, among others, could cause actual results to differ materially from those described in the forward-looking statements: inability to obtain, or meet conditions imposed for, governmental approvals for the transaction; failure of the stockholders of AmeriSource and Bergen Brunswig to approve the merger; the risk that the businesses of AmeriSource and Bergen Brunswig will not be integrated successfully; failure to obtain and retain expected synergies; and other economic, business, competitive and/or regulatory factors affecting the businesses of AmeriSource and Bergen Brunswig generally. More detailed information about these factors is set forth in AmeriSource's and Bergen Brunswig's filings with the Securities and Exchange Commission, including each of their Annual Reports on Form 10-K for fiscal 2000 and their most recent quarterly reports on Form 10-Q. AmeriSource and Bergen Brunswig are under no obligation to (and expressly disclaim any such obligation to) update or alter their forward-looking statements whether as a result of new information, future events or otherwise. ADDITIONAL INFORMATION In connection with their proposed merger, AmerisourceBergen, together with AmeriSource and Bergen Brunswig, filed a preliminary joint proxy statement/prospectus with the Securities and Exchange Commission. INVESTORS AND SECURITY HOLDERS ARE ADVISED TO READ THE DEFINITIVE JOINT PROXY STATEMENT/PROSPECTUS WHEN IT BECOMES AVAILABLE, BECAUSE IT WILL CONTAIN IMPORTANT INFORMATION. Investors and security holders may obtain a free copy of the definitive joint proxy statement/prospectus (when available) and other documents filed by AmerisourceBergen (as well as by AmeriSource and Bergen Brunswig) at the Securities and Exchange Commission's web site at www.sec.gov. The definitive joint proxy statement/prospectus and such other documents may also be obtained for free from AmeriSource or from Bergen Brunswig by directing such request to AmeriSource Health Corporation, General Counsel, 1300 Morris Drive, Suite 100, Chesterbrook, Pennsylvania 19087-5594, Telephone: (610) 727-7000; or to Bergen Brunswig Corporation, Attention: Corporate Secretary, 4000 Metropolitan Drive, Orange, California 92868-3510, Telephone: (714) 385-4000. PARTICIPANTS IN SOLICITATION AmeriSource and Bergen Brunswig and their respective directors, executive officers and other members of their management and employees may be deemed to be participants in the solicitation of proxies from their respective stockholders in connection with the proposed merger. Information concerning AmeriSource's participants in the solicitation is set forth in AmeriSource's Current Report on Form 8-K filed with the Securities and Exchange Commission on March 19, 2001, and information concerning Bergen Brunswig's participants in the solicitation is set forth in Bergen Brunswig's Current Report on Form 8-K filed with the Securities and Exchange Commission on March 19, 2001. (BW)(PA-AMERISOURCE/BERGEN)(AAS)(BBC) AmeriSource and Bergen Brunswig Certify Compliance With the Federal Trade Commission's 'Second Request' for Information Business Editors/Health & Medical Writers VALLEY FORGE, Pa. & ORANGE, Calif.--(BUSINESS WIRE)--July 27, 2001--AmeriSource Health Corporation (NYSE:AAS) and Bergen Brunswig Corporation (NYSE:BBC) announced that today each of them has certified compliance with the Federal Trade Commission's request for additional information in connection with their previously announced plan to merge the two companies. Pursuant to the Hart-Scott-Rodino Antitrust Improvements Act of 1976, today's certification starts the FTC's 30-day review period, which will expire at midnight eastern daylight time on Monday, August 27, 2001. Termination or expiration of the review period is a condition to the consummation of the business combination. The companies expect to complete the merger by the end of August 2001. On March 19, 2001, AmeriSource and Bergen Brunswig announced that they had entered into a merger agreement to create a new company named AmerisourceBergen Corporation. Under the terms of the agreement, each share of Bergen Brunswig common stock will be converted into 0.37 shares of AmerisourceBergen common stock and each share of AmeriSource common stock will be converted into one share of AmerisourceBergen common stock. About AmeriSource AmeriSource Health Corporation, with approximately $14 billion in annualized operating revenue, is a leading distributor of pharmaceutical and related healthcare products and services, and the industry's largest provider of pharmaceuticals to acute care/health systems customers. Headquartered in Valley Forge, PA, the Company serves its base of about 15,000 customer accounts through a national network of 22 strategically located drug distribution facilities. For news and additional information about the company, visit its web site at www.amerisource.com. About Bergen Brunswig Bergen Brunswig Corporation, headquartered in Orange County, California, is a leading supplier of pharmaceuticals and specialty healthcare products as well as information management solutions and consulting services. Bergen's customers include the nation's healthcare providers (hospitals, nursing homes, physicians), drug stores, manufacturers and patients. Through its subsidiary companies, Bergen provides product distribution, logistics, pharmacy management programs, and Internet fulfillment strategies designed to reduce costs and improve patient outcomes across the entire healthcare spectrum. Bergen Brunswig press releases are available on the Company's web site at www.bergenbrunswig.com. Forward-Looking Statements The foregoing communication contains certain "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. These statements are based on management's current expectations and are subject to uncertainty and changes in circumstances. Actual results may vary materially from the expectations contained in the forward-looking statements. The forward-looking statements herein include statements addressing future financial and operating results of AmeriSource and Bergen Brunswig and the timing, benefits and other aspects of the proposed merger. The following factors, among others, could cause actual results to differ materially from those described in the forward-looking statements: inability to obtain, or meet conditions imposed for, governmental approvals for the transaction; failure of the stockholders of AmeriSource and Bergen Brunswig to approve the merger; the risk that the businesses of AmeriSource and Bergen Brunswig will not be integrated successfully; failure to obtain and retain expected synergies; and other economic, business, competitive and/or regulatory factors affecting the businesses of AmeriSource and Bergen Brunswig generally. More detailed information about these factors is set forth in AmeriSource's and Bergen Brunswig's filings with the Securities and Exchange Commission, including each of their Annual Reports on Form 10-K for fiscal 2000 and their most recent quarterly reports on Form 10-Q. AmeriSource and Bergen Brunswig are under no obligation to (and expressly disclaim any such obligation to) update or alter their forward-looking statements whether as a result of new information, future events or otherwise. Additional Information About The Merger In connection with their proposed merger, AmeriSource-Bergen, together with AmeriSource and Bergen Brunswig, filed a joint proxy statement/prospectus with the Securities and Exchange Commission. INVESTORS AND SECURITY HOLDERS ARE ADVISED TO READ THE JOINT PROXY STATEMENT/PROSPECTUS WHEN IT BECOMES AVAILABLE, BECAUSE IT WILL CONTAIN IMPORTANT INFORMATION. Investors and security holders may obtain a free copy of the joint proxy statement/prospectus (when available) and other documents filed by AmeriSource-Bergen (as well as by AmeriSource and Bergen Brunswig) at the SEC's web site at www.sec.gov. The joint proxy statement/prospectus and such other documents may also be obtained for free from AmeriSource or from Bergen Brunswig by directing such request to AmeriSource Health Corporation, General Counsel, 1300 Morris Drive, Suite 100, Chesterbrook, Pennsylvania 19087-5594, telephone: 610/727-7000; or to Bergen Brunswig Corporation, Attention: Corporate Secretary, 4000 Metropolitan Drive, Orange, California 92868-3510, Telephone: 714/385-4000. AmeriSource and Bergen Brunswig and their respective directors, executive officers and other members of their management and employees may be deemed to be participants in the solicitation of proxies from their respective stockholders in connection with the proposed merger. Information concerning AmeriSource's participants in the solicitation is set forth in AmeriSource's Current Report on Form 8-K filed with the Securities and Exchange Commission on March 19, 2001, and information concerning Bergen Brunswig's participants in the solicitation is set forth in Bergen Brunswig's Current Report on Form 8-K filed with the Securities and Exchange Commission on March 19, 2001. --30-- CONTACT: AmeriSource Health Corporation, Valley Forge Michael N. Kilpatric, 610/727-7118 mkilpatric@amerisource.com or Bergen Brunswig Donna Dolan, 714/385-4226 donna.dolan@bergenbrunswig.com