* Sensytech, a Newington company that makes electronic surveillance, communications and imaging systems, earned $1 million (15 cents a share) on $14 million in revenue during its second fiscal quarter ended March 31, compared with earnings of $1.1 million (16 cents) on $12.9 million in revenue during the same quarter a year ago. For the first six months the company earned $1.9 million (28 cents) on $26.7 million in revenue, compared with $1.9 million (32 cents) on $24.6 million. Shares closed at $18.12, up 13 cents.

* Spherix, a Beltsville biotechnology and information services company, narrowed its first-quarter loss to $547,401 (5 cents a share) from a loss of $686,388 (6 cents) during the same quarter last year. Revenue increased to $5.1 million from $4.4 million last year. Shares closed at $6.30, up 8 cents.

* Isomet, a Springfield company that makes acousto-optic systems, lost $182,000 (9 cents a share) during its first quarter, compared with a loss of $95,000 (5 cents) during the year-ago quarter. Revenue rose to $1.2 million from $1.1 million last year. Shares closed down 30 cents, at $1.70.

* Anteon won a contract from the Naval Surface Warfare Center, Carderock Division, to help evaluate how vessels, their components and various materials survive explosions. Under the terms of the contact, which is worth up to $15.5 million over five years, Fairfax-based Anteon will develop and apply underwater shock analyses.

Compiled from reports by Washington Post staff writers and Dow Jones News Service.