UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ------------ FORM 10-K/A ------------ (Mark One) Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 [Fee Required] [X] For the Fiscal Year Ended September 30, 1999 OR [_] Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 [No Fee Required] For the transition period from to Commission Registrant, State of Incorporation IRS Employer File Number Address and Telephone Number Identification No. ----------- ---------------------------------- ------------------ 33-27835-01 AmeriSource Health Corporation 23-2546940 (a Delaware Corporation) 300 Chester Field Parkway Malvern, PA 19355- (610) 296-4480 Securities Registered Pursuant to Section 12(b) of the Act: AmeriSource Health Corporation: None Securities Registered Pursuant to Section 12(g) of the Act: AmeriSource Health Corporation: Common Stock, $.01 par value per share Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes [X] No [_] Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of the registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. [_] Non-affiliates of AmeriSource Health Corporation, as of December 1, 1999, held 49,092,588 shares of voting stock. The registrant's voting stock is traded on the New York Stock Exchange under the trading symbol "AAS." The aggregate market value of the registrant's voting stock held by non-affiliates of the registrant (based upon the closing price of such stock on the New York Stock Exchange on December 1, 1999 and the assumption for this computation only that 399 Venture Partners, Inc. and all directors and executive officers of the registrant are affiliates) was $610,589,063.25. The number of shares of common stock of AmeriSource Health Corporation outstanding as of December 1, 1999 was: Class A--51,178,274; Class B--8,446; Class C--165,346. Documents Incorporated by Reference Portions of the following document are incorporated by reference in the Part of this report indicated below: Part III--Registrant's Proxy Statement for the 2000 Annual Meeting of Stockholders. SIGNATURES Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. AmeriSource Health Corporation /s/ George L. James III By: _________________________________ Date: December 29, 1999 (George L. James III) Vice President and Chief Financial Officer Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below on December 29, 1999 by the following persons on behalf of the Registrant and in the capacities indicated. Signature Title /s/ R. David Yost President and Chief - ------------------------------------- Executive Officer (R. David Yost) and Director (Principal Executive Officer) /s/ George L. James III Vice President and - ------------------------------------- Chief Financial (George L. James III) Officer (Principal Financial Officer) /s/ Michael D. DiCandilo Vice President, - ------------------------------------- Controller (Michael D. DiCandilo) (Principal Accounting Officer) Director /s/ Bruce C. Bruckmann - ------------------------------------- (Bruce C. Bruckmann) /s/ Michael A. Delaney Director - ------------------------------------- (Michael A. Delaney) /s/ Richard C. Gozon Director - ------------------------------------- (Richard C. Gozon) /s/ Lawrence C. Karlson Director and - ------------------------------------- Chairman (Lawrence C. Karlson) /s/ George H. Strong Director - ------------------------------------- (George H. Strong) /s/ Edward E. Hagenlocker Director - ------------------------------------- (Edward E. Hagenlocker) Director - ------------------------------------- (Barton J. Winokur) EXPLANATORY NOTE The purpose of this amendment filing is solely to bring the EDGAR database current. Exhibit 23 was inadvertently not included in the Form 10-K filing submitted on December 28, 1999 (Registration No. 000-20485).