Stock Trading History of Singer Karen M

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 Singer Karen M since year 2005. The trader's CIK number is 1250529. At the time of this reporting, Singer Karen M is the VP, General Counsel & Sec of Corporate Office Properties Trust (stock ticker symbol OFC).

Stock purchases, sales, and option exercises reported by *Singer Karen M* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2007-09-12	OFC	Corporate Office Properties Trust	Sale	5,000	40.91	204,549
2007-09-12	OFC	Corporate Office Properties Trust	Option Exercise	5,000	11.87	59,349
2007-03-06	OFC	Corporate Office Properties Trust	Option Exercise	5,000	11.87	59,349
2007-03-06	OFC	Corporate Office Properties Trust	Sale	5,000	48.62	243,100
2006-08-09	OFC	Corporate Office Properties Trust	Sale	14,000	46.61	652,540
2006-08-09	OFC	Corporate Office Properties Trust	Option Exercise	14,000	10.70	149,870
2006-03-02	OFC	Corporate Office Properties Trust	Sale	5,000	41.67	208,350
2006-03-02	OFC	Corporate Office Properties Trust	Option Exercise	5,000	9.54	47,699

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 Singer Karen M (VP, General Counsel & Sec of Corporate Office Properties Trust at the time of this reporting) see the Securities and Exchange Commission (SEC) website.