Chiron 2001 Annual Report- Corporate Information

Directors
Seán P. Lance
Chairman of the Board;
President and Chief Executive Officer,
Chiron Corporation

Raymund Breu, Ph.D.
Chief Financial Officer, Member of the
Executive Committee
Novartis AG

Vaughn D. Bryson
President, Life Science Advisors

Lewis W. Coleman
President, Gordon and Betty Moore Foundation

Pierre E. Douaze
Former Member of the Executive Committee of Management and Head of Novartis Healthcare; Board Member of Serono; Board Member of Galenica; Board Member of deVGen N.V.;

Paul L. Herrling, Ph.D.
Head of Research, Novartis Pharma AG

Edward E. Penhoet, Ph.D.
Dean, School of Public Health,
University of California, Berkeley

William J. Rutter, Ph.D.
Chairman Emeritus

Jack W. Schuler
Chairman, Stericycle, Inc.

Pieter J. Strijkert, Ph.D.
Chairman, Crucell N.V.; Chairman, Pamgene B.V.; Chairman, deVGen N.V.

Officers
Rajen K. Dalal
Vice President; President, Chiron Blood Testing

William G. Green, Esq.
Senior Vice President; General Counsel and Secretary

Peder K. Jensen, M.D.
Vice President, Global Development

John A. Lambert
Vice President; President, Chiron Vaccines

Seán P. Lance
Chairman of the Board; President and
Chief Executive Officer

Joyce A. Lonergan
Vice President, Corporate Development
and Investor Relations

David V. Smith
Vice President, Finance;
Principal Accounting Officer

Linda W. Short
Vice President, Corporate Resources

James R. Sulat
Vice President; Chief Financial Officer

Craig A. Wheeler
Vice President; President, Chiron
Biopharmaceuticals

SEC Form 10-K
A copy of the Company’s annual report to the Securities and Exchange Commission on Form 10-K, exclusive of exhibits, may be downloaded here. Copies of the Form 10-K, exclusive of exhibits, are available without charge upon written request to:

Corporate Communications
Chiron Corporation
4560 Horton Street
Emeryville, CA 94608-2916

or via the internet at www.chiron.com

For inquiries about the limited partnerships or convertible bonds, please contact:

James E. Kent
Vice President and Treasurer
Chiron Corporation
4560 Horton Street
Emeryville, CA 94608-2916

Corporate Headquarters
4560 Horton Street
Emeryville, CA 94608-2916
Telephone: 510.655.8730
Telecopier: 510.655.9910

Independent Auditors
KPMG LLP
San Francisco, CA

Number of Holders of Common Stock
As of December 31, 2001, there were 4,757 stockholders of record of Chiron Common Stock. There were no remaining stockholders of record of Cetus Common Stock or Viagene Common Stock.

Annual Meeting
The Annual Meeting of Stockholders will be held at 10:00 a.m. PDT Thursday, May 16, 2002 at the Chiron Auditorium, 1450 53rd Street, Emeryville, CA 94608

Transfer Agent and Registrar
Wells Fargo Bank Minnesota, N.A.
Shareowner Services

Mailing address:
P.O. Box 64854
St. Paul, MN 55164-0854

Overnight delivery and street address:
161 North Concord Exchange Street
South St. Paul, MN 55075-1139
Telephone: 800.468.9716
E-mail address: stocktransfer@wellsfargo.com

Corporate Profile
Chiron Corporation, headquartered in Emeryville, California, is a global pharmaceutical company
that leverages a diverse business model to develop and commercialize high-value products that make a difference in people’s lives. The company has a strategic focus on cancer and infectious disease. Chiron applies its advanced understanding of the biology of cancer and infectious disease to develop products from its platforms in proteins, small molecules, and vaccines. The company commercializes its products through three business units: BioPharmaceuticals, Vaccines, and Blood Testing.

For more information about Chiron, visit the company’s website at www.chiron.com.

NASDAQ Stock Symbol: CHIR
Chiron is included in the S&P 500 Index.

It is the policy of Chiron Corporation to base all employment decisions on the principles of equal employment opportunity and to take affirmative action in the employment of women, minorities, individuals with disabilities, and veterans.