Stock Trading History of Pfeiffer David F

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 Pfeiffer David F since year 2005. The trader's CIK number is 1233934. At the time of this reporting, Pfeiffer David F is the Sr. VP, Sales and Marketing of Collagenex Pharmaceuticals Inc (stock ticker symbol CGPI).

Stock purchases, sales, and option exercises reported by insider *Pfeiffer David F* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-02-04	CGPI	Collagenex Pharmaceuticals Inc	Option Exercise	6,667	6.25	41,668
2008-02-04	CGPI	Collagenex Pharmaceuticals Inc	Sale	6,667	12.28	81,870
2008-01-28	CGPI	Collagenex Pharmaceuticals Inc	Option Exercise	6,667	6.25	41,668
2008-01-28	CGPI	Collagenex Pharmaceuticals Inc	Sale	6,667	11.81	78,759
2008-01-28	CGPI	Collagenex Pharmaceuticals Inc	Option Exercise	6,667	6.25	41,668
2008-01-28	CGPI	Collagenex Pharmaceuticals Inc	Sale	6,667	11.81	78,759
2008-01-22	CGPI	Collagenex Pharmaceuticals Inc	Option Exercise	6,666	6.25	41,662
2008-01-22	CGPI	Collagenex Pharmaceuticals Inc	Sale	6,666	10.88	72,526
2007-07-16	CGPI	Collagenex Pharmaceuticals Inc	Sale	10,000	12.65	126,519
2007-07-16	CGPI	Collagenex Pharmaceuticals Inc	Option Exercise	10,000	10.62	106,250
2007-07-09	CGPI	Collagenex Pharmaceuticals Inc	Option Exercise	10,000	10.62	106,250
2007-07-09	CGPI	Collagenex Pharmaceuticals Inc	Sale	10,000	12.87	128,680
2007-07-02	CGPI	Collagenex Pharmaceuticals Inc	Option Exercise	10,000	10.62	106,250
2007-07-02	CGPI	Collagenex Pharmaceuticals Inc	Sale	10,000	12.79	127,946
2007-06-25	CGPI	Collagenex Pharmaceuticals Inc	Option Exercise	10,000	10.62	106,250
2007-06-25	CGPI	Collagenex Pharmaceuticals Inc	Sale	10,000	12.35	123,518
2007-06-18	CGPI	Collagenex Pharmaceuticals Inc	Sale	10,000	12.24	122,423
2007-06-18	CGPI	Collagenex Pharmaceuticals Inc	Option Exercise	10,000	10.62	106,250
2007-06-11	CGPI	Collagenex Pharmaceuticals Inc	Option Exercise	10,000	10.62	106,250
2007-06-11	CGPI	Collagenex Pharmaceuticals Inc	Sale	10,000	12.04	120,410
2005-06-10	CGPI	Collagenex Pharmaceuticals Inc	Purchase	4,000	4.90	19,600

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 Pfeiffer David F (Sr. VP, Sales and Marketing of Collagenex Pharmaceuticals Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.