Disclosure of Securities Transactions

Disclosure of Securities Transactions by Members of the Supervisory Board and Board of Management

To comply with Section 15 a of the German Securities Trading Act, members of the Board of Management and Supervisory Board and their close relatives are required to disclose all transactions involving the purchase or sale of Bayer stock where such transactions total EUR 5,000 or more in a calendar year.

According to information filed with the company by members of the Board of Management and Supervisory Board, their total holdings of Bayer stock and related financial instruments amounted to less than 1 percent of the issued stock on the closing date for the financial statements.

Transactions in the current fiscal year

Date/ Place	Name/ Function	Security	ISIN	Type of Transaction	Price/ Currency	Quantity	Total amount
May 13, 2008 Xetra	Willy Beumann, Supervisory Board	Share	DE0005752000	Buy	€ 55.72	261	€ 14,542.92

Transactions in previous fiscal years

2007:

Date/ Place	Name/ Function	Security	ISIN	Type of Transaction	Price/ Currency	Quantity	Total amount
March 29, 2007 Xetra	Dr. Wolfgang Plischke, Management Board	Share	DE0005752000	Buy	€ 47.70	5,300	€ 252,810.00
January 10, 2007 Over the counter (Expiration date: May 23, 2008)	Dr. Wolfgang Plischke, Management Board	PROTECT- Discount-Share- Certificate (Underlying instrument: Share)	FI: DE000SCL57K9 (Underlying instrument: DE0005752000)	Buy	€ 40.12 (Strike price: € 27.50 / Price multiplier: 1)	350	€ 14,042.00

2006: No reportable securities transactions
2005: No reportable securities transactions

Links

Board of Management

Supervisory Board