Metrocall Holdings Inc., an Alexandria paging and wireless messaging company, earned $7.2 million ($1.24 per share) on $87.1 million in revenue during the second quarter, up from $6.4 million (64 cents) on $82.8 million in revenue during the second quarter last year. For the six months ended June 30, the company earned $14.7 million ($2.55) on $177.8 million in revenue, up from of $9.4 million (65 cents) on $170.2 million in revenue. Metrocall had $26.7 million in cash at the end of the second quarter. Shares of Metrocall closed at $64.40, down $1.40 or 2.1 percent.

* Aether Systems Inc., an Owings Mills wireless data company, lost $49.8 million ($1.14) on $12.4 million in revenue during the second quarter, compared with a loss of $14.7 million (35 cents) on $14.5 million in revenue in the second quarter of 2003. For the six months ended June 30, the company lost $40.7 million (93 cents) on $24.9 million in revenue, compared with a loss of $27.2 million (64 cents) on $29.3 million in revenue during the same period last year. The company took a $35.6 million charge (81 cents) during the second quarter. Shares of Aether Systems closed at $2.86, down 23 cents or 7.4 percent.

* TVI Corp., a Glenn Dale company that makes equipment for first responders, the military and public health agencies, earned $1.7 million (6 cents) on $10.2 million in revenue during the second quarter, up from $1.2 million (4 cents) on $6.8 million in revenue during the year-ago quarter. For the six months ended June 30, the company earned $3.4 million (11 cents) on $18.8 million in revenue, up from $2.4 million (8 cents) on $12.4 million in revenue during the same period last year. Shares of TVI closed up 3 cents at $4.10.

Compiled from reports by Washington Post staff writers.