* NII Holdings, a Reston company that provides mobile communications to businesses in Latin America, earned $25 million (34 cents a share) in the second quarter, down from net income of $42 million (65 cents) during the corresponding period a year ago. Revenue rose 35 percent, to $304 million. The company added 111,200 net subscribers during the second quarter, bringing its total to 1.66 million. For the six months ended June 30, the company lost $15 million (22 cents) on $581 million in revenue, compared with net income of $51 million (80 cents) on $429 million in revenue for the same period last year. Shares of NII closed at $36.97, up $1.63 or 4.6 percent.

* WebMethods, a Fairfax Web services company, lost $10.8 million (20 cents a share) on $41.8 million in revenue during its first fiscal quarter ended June 30, compared with a loss of $6.8 million (13 cents) on $43.2 million in revenue during the year-ago quarter. Shares of WebMethods closed at $5.15, up 13 cents, or 2.6 percent.

* TNS, a Reston data communications company specializing in point-of-sale transaction and e-commerce services, earned $1.5 million (5 cents a share) on $60.9 million in revenue during the second quarter, up from a loss of $1 million (38 cents) on $54.1 million in revenue during the year-ago quarter. For the six months ended June 30, the company lost $194,000 (17 cents) on $121.1 million in revenue, compared with a loss of $3.5 million (87 cents) on $104.8 million in revenue during the same period last year. Shares of TNS closed at $21.35, down 5 cents.

* Vastera, a Dulles software and consulting firm to the global trade industry, said its second-quarter loss broadened to $1.4 million (3 cents a share) from a loss of $612,000 (1 cent) a year ago. Revenue fell to $21.2 million from $21.5 million. For the first six months, Vastera's loss broadened to $2.4 million (6 cents) from a loss of $1.5 million (4 cents.) Revenue rose 3 percent, to $28.2 million.

* Visual Networks, a Rockville maker of network-management software, said its loss narrowed in the second quarter to $414,000 (1 cent a share) from a loss of $677,000 (2 cents) a year ago. Revenue rose 31 percent, to $12.8 million. For the first six months, the loss broadened to $900,000 (3 cents) from $800,000 (2 cents.) Revenue rose to $24.7 million from $19 million.

* CACI International, an Arlington government technology contractor, won a five-year contract from the General Services Administration to provide program management support services to the Transportation Security Administration (TSA). Under the terms of the multiple-award contract, CACI will compete with two other contractors for task orders potentially worth up to $45 million. CACI will assist TSA in establishing, managing and maintaining a comprehensive acquisition program.

* Halifax, an Alexandria information technology and network security company, won a three-year renewal on an enterprise maintenance contract with an unnamed major aerospace and defense contractor. The company said the renewal is worth more than $10 million.

Compiled from reports by Washington Post staff writers.