Stock Trading History of Caulfield Barbara A

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 Caulfield Barbara A since year 2005. The trader's CIK number is 1240355. At the time of this reporting, Caulfield Barbara A is the EVP and General Counsel of Affymetrix Inc (stock ticker symbol AFFX).

Stock purchases, sales, and option exercises reported by *Caulfield Barbara A* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2007-10-18	AFFX	Affymetrix Inc	Sale	2,250	28.00	63,000
2007-07-09	AFFX	Affymetrix Inc	Option Exercise	10,000	19.34	193,350
2007-07-09	AFFX	Affymetrix Inc	Sale	10,000	26.00	260,000
2007-06-15	AFFX	Affymetrix Inc	Option Exercise	10,000	19.34	193,350
2007-06-15	AFFX	Affymetrix Inc	Sale	10,000	26.00	260,000
2007-05-24	AFFX	Affymetrix Inc	Option Exercise	10,000	19.34	193,350
2007-05-23	AFFX	Affymetrix Inc	Option Exercise	10,000	19.34	193,350
2007-05-24	AFFX	Affymetrix Inc	Sale	10,000	26.14	261,395
2007-05-23	AFFX	Affymetrix Inc	Sale	10,000	26.00	260,000
2007-05-01	AFFX	Affymetrix Inc	Option Exercise	10,000	19.34	193,350
2007-05-01	AFFX	Affymetrix Inc	Sale	10,000	26.36	263,580
2007-04-02	AFFX	Affymetrix Inc	Sale	9,300	29.73	276,504
2007-04-02	AFFX	Affymetrix Inc	Option Exercise	9,300	19.34	179,815
2007-04-02	AFFX	Affymetrix Inc	Sale	700	30.00	21,000
2007-04-02	AFFX	Affymetrix Inc	Option Exercise	700	19.34	13,534
2007-03-02	AFFX	Affymetrix Inc	Option Exercise	10,000	19.34	193,350
2007-03-02	AFFX	Affymetrix Inc	Sale	10,000	26.00	260,000
2007-02-07	AFFX	Affymetrix Inc	Sale	20,000	26.00	520,000
2007-02-07	AFFX	Affymetrix Inc	Option Exercise	20,000	19.34	386,700
2006-12-12	AFFX	Affymetrix Inc	Option Exercise	10,000	19.34	193,350
2006-12-12	AFFX	Affymetrix Inc	Sale	10,000	26.00	260,000
2006-01-03	AFFX	Affymetrix Inc	Option Exercise	5,000	19.34	96,675
2006-01-03	AFFX	Affymetrix Inc	Sale	5,000	47.43	237,160

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 Caulfield Barbara A (EVP and General Counsel of Affymetrix Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.