SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K Current Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported) December 7, 1999 ---------------------------- Abbott Laboratories - ------------------------------------------------------------------------------- (Exact Name of Registrant as Specified in Charter) Illinois - ------------------------------------------------------------------------------- (State or Other Jurisdiction of Incorporation) 1-2189 36-0698440 - ------------------------------------------------------------------------------- (Commission File Number) (IRS Employer Identification No.) 100 Abbott Park Road, Abbott Park, Illinois 60064-6400 - ------------------------------------------------------------------------------- (Address of Principal Executive Offices) (Zip Code) (847) 937-6100 - ------------------------------------------------------------------------------- (Registrant's Telephone Number, Including Area Code) - ------------------------------------------------------------------------------- (Former Name or Former Address, if Changed Since Last Report) -1- Item 5. Other Events On December 7, 1999, Abbott Laboratories and BankBoston, N.A., as Rights Agent, executed Amendment Number 1 to its Rights Agreement, by and between Abbott Laboratories and BankBoston, N.A., dated as of November 11, 1999. Item 7. Financial Statements and Exhibits. (c) Exhibits Exhibit No. Exhibit 99.1 Amendment Number 1 to Rights Agreement, dated as of December 7, 1999, by and between Abbott Laboratories and BankBoston, N.A., as Rights Agent. -2- SIGNATURE Pursuant to the requirements 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. ABBOTT LABORATORIES Date: December 17, 1999 By: /s/ Gary P. Coughlan ------------------------------ Name: Gary P. Coughlan Title: Senior Vice President, Finance and Chief Financial Officer -3- EXHIBIT INDEX Exhibit No. Exhibit - ---------- -------- 99.1 Amendment Number 1 to Rights Agreement, dated as of December 7, 1999, by and between Abbott Laboratories and BankBoston, N.A., as Rights Agent. -4-