There are several stock exchanges around the world, catering for many different companies. The following is a list of some of the major ones:

American Stock Exchange
http://www.amex.com

New York Stock Exchange
http://www.nyse.com

NASDAQ Stock Market
http://www.nasdaq.com

London Stock Exchange
http://www.londonstockexchange.com

Toronto Stock Exchange
http://www.tse.com

Tokyo Stock Exchange
http://www.tse.or.jp

Copenhagen Stock Exchange
http://www.xcse.dk

New Zealand Stock Exchange
http://www.nzse.co.nz

Stock Exchange of Hong Kong
http://www.sehk.com.hk

Swiss Stock Exchange
http://www.swx.ch