September 25, 2007
September 26, 2007:

Last trading day for Bayer ADSs on Wall Street

Leverkusen, September 25, 2007 - The American Depositary Shares (ADSs) of Bayer
AG will be traded on the New York Stock Exchange (NYSE) for the last time
tomorrow, Wednesday. Starting Thursday, September 27, Bayer ADSs will be traded
in the U.S. over-the-counter market.

Bayer had announced on September 5 that it would file for delisting of its ADSs
from the NYSE. The company also plans to file for deregistration with the
Securities and Exchange Commission (SEC), resulting in termination of the
respective reporting obligations.

For more information go to

Forward-looking statements

This news release contains forward-looking statements based on current
assumptions and forecasts made by Bayer Group management. Various known and
unknown risks, uncertainties and other factors could lead to material
differences between the actual future results, financial situation, development
or performance of the company and the estimates given here. These factors
include those discussed in our public reports filed with the Frankfurt Stock
Exchange and with the U.S. Securities and Exchange Commission (including our
Form 20-F). The company assumes no liability whatsoever to update these
forward-looking statements or to conform them to future events or developments.