Stock Trading History of Hall Kenneth J.

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 Hall Kenneth J. since year 2005. The trader's CIK number is 1430979. At the time of this reporting, Hall Kenneth J. is the EVP, CFO, and Treasurer of Aether Systems Inc . (stock ticker symbol AETH). See this page for all insider trading activities at Aether Systems Inc .

Stock purchases, sales, and option exercises reported by insider *Hall Kenneth J.* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-03-26	NEXC	Aether Systems Inc	Purchase	30,000	3.36	100,700

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 Hall Kenneth J. (EVP, CFO, and Treasurer of Aether Systems Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.