ImClone Systems Incorporated To Host 2003 Fourth Quarter And Year-End Financial Results Conference Call

NEW YORK--(BUSINESS WIRE)--March 8, 2004--ImClone Systems Incorporated (NASDAQ: IMCL - News) today announced that the Company will host a conference call with the financial community to discuss 2003 fourth quarter and year-end financial results and the Company’s plans for 2004 on Monday, March 15, 2004 at 11:00 AM Eastern Time.

The conference call will be webcast live and may be accessed by visiting ImClone Systems’ website at www.imclone.com. A replay of the audio webcast will be available under “Earnings Webcast” in the “Investor Relations” section of the Company’s website starting shortly after the call on March 15, 2004.

Those parties interested in participating via telephone may join by dialing (877) 692-2588, or (973) 582-2749 for calls outside of Canada and the United States. A telephone replay of the conference call will be available shortly after the call until March 22, 2004 at midnight Eastern Time. To access the telephone replay, dial (877) 519-4471 domestically, or (973) 341-3080 for calls outside of Canada and the United States, and enter passcode number 4580834.

About ImClone Systems Incorporated

ImClone Systems Incorporated is committed to advancing oncology care by developing a portfolio of targeted biologic treatments, designed to address the medical needs of patients with a variety of cancers. The Company’s three programs include growth factor blockers, angiogenesis inhibitors and cancer vaccines. ImClone Systems’ strategy is to become a fully integrated biopharmaceutical company, taking its development programs from the research stage to the market. ImClone Systems’ headquarters and research operations are located in New York City, with additional administration and manufacturing facilities in Branchburg, New Jersey.

Certain matters discussed in this news release may constitute forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 and the Federal securities laws. Although the company believes that the expectations reflected in such forward-looking statements are based upon reasonable assumptions, it can give no assurance that its expectations will be achieved. Forward-looking information is subject to certain risks, trends and uncertainties that could cause actual results to differ materially from those projected. Many of these factors are beyond the company’s ability to control or predict. Important factors that may cause actual results to differ materially include, but are not limited to, the risks and uncertainties associated with completing pre-clinical and clinical trials of the company’s compounds that demonstrate such compounds’ safety and effectiveness; manufacturing losses and risks associated therewith; obtaining additional financing to support the company’s operations; obtaining and maintaining regulatory approval for such compounds and complying with other governmental regulations applicable to the company’s business; obtaining the raw materials necessary in the development of such compounds; consummating and maintaining collaborative arrangements with corporate partners for product development; achieving milestones under collaborative arrangements with corporate partners; developing the capacity to manufacture, market and sell the company’s products, either directly or with collaborative partners; developing market demand for and acceptance of such products; competing effectively with other pharmaceutical and biotechnological products; obtaining adequate reimbursement from third party payers; attracting and retaining key personnel; legal costs and the outcome of outstanding legal proceedings and investigations including but not limited to our investigations pertaining to withholding tax issues; complying with covenants in the indenture for the company’s Convertible Subordinated Notes and with the terms of other contractual obligations; obtaining patent protection for discoveries and risks associated with commercial limitations imposed by patents owned or controlled by third parties. For further information on factors which could impact the company and the statements contained in this news release, reference should be made to the company’s filings with the Securities and Exchange Commission, including quarterly reports on Form 10-Q, current reports on Form 8-K and annual reports on Form 10-K. For forward-looking statements in this news release, the company claims the protection of the safe harbor for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995. The company assumes no obligation to update or supplement any forward-looking statements, whether as a result of new information, future events or otherwise.

Contact:

ImClone Systems Incorporated Investors: Andrea F. Rabney/Stefania Bethlen, 646-638-5058 www.imclone.com

Source: ImClone Systems Incorporated

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