Stock Trading History of Wright Jonathan K.

The following table details the trading activities (stock purchases, stock sales, and stock option exercises) reported to the Securities and Exchange Commission (SEC) by insider Wright Jonathan K. since year 2005. The trader's CIK number is 1419426. At the time of this reporting, Wright Jonathan K. is the SVP and General Counsel of Kosan Biosciences Inc . (stock ticker symbol KOSN). See this page for all insider trading activities at Kosan Biosciences Inc .

Stock purchases, sales, and option exercises reported by insider *Wright Jonathan K.* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-03-06	KOSN	Kosan Biosciences Inc	Purchase	1,300	1.48	1,921
2008-03-05	KOSN	Kosan Biosciences Inc	Purchase	1,500	1.54	2,310

Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Wright Jonathan K. (SVP and General Counsel of Kosan Biosciences Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.