* XO Communications, a Reston telecommunications company, lost $43.8 million (31 cents a share) on $278.2 million in revenue during the second quarter, compared with a loss of $19.8 million (21 cents) on $283.9 million in revenue a year earlier. For the six months ended June 30, the company lost $92.3 million (67 cents) on revenue of $539.1 million, compared with a loss of $40.3 million (42 cents) on $570 million a year earlier. XO also said it raised $200 million through a private offering to XO shareholders of 6 percent convertible preferred stock. Affiliates of Carl C. Icahn, XO's chairman and owner of about half of XO's outstanding common stock, purchased $190 million of the preferred stock, and an affiliate of Amalgamated Gadget, holder of 9.4 percent of XO's outstanding common stock, purchased an additional $10 million. Each share of preferred stock is initially convertible at $4.62 per share into 10.82 shares of XO common stock. Shares of XO closed up 6 cents, at $3.75.

* Novavax, a Columbia biopharmaceutical company, lost $7.7 million (22 cents a share) on $3 million in revenue during its second quarter, compared with a loss of $5 million (17 cents) on $2.3 million in revenue during the same quarter a year ago. For the six months ended June 30, the company lost $13 million (37 cents) on $6.2 million in revenue, compared with a loss of $10.8 million (38 cents) on $3.5 million last year. Shares of Novavax closed down 14 cents, at $3.72.

* Integral Systems, a Lanham satellite systems company, earned $1.4 million (14 cents a share) on $22.6 million in revenue during its third fiscal quarter ended June 30, up from net income of $171,894 (2 cents) on $19.3 million in revenue during the year-ago quarter. For the nine months ended June 30, the company earned $4.3 million (44 cents) on $65.2 million in revenue, up from a net income of $2.5 million (26 cents) on $58.9 million in revenue during the same period last year. Shares of Integral Systems closed at $16.01, down 29 cents.

* VCampus, a Reston online education company, lost $2.3 million (34 cents a share) on revenue of $1.5 million, compared with a loss of $743,659 ($1.09) on $1.6 million revenue in the same period a year ago. For the six months ended June 30, the company lost $3.1 million (51 cents) on revenue of $3 million, compared with a loss of $1.8 million ($2.12) on $3.3 million last year.

* AAI, a Hunt Valley subsidiary of United Industrial, won a five-year, $160 million contract from the Defense Department to provide logistic support for joint service biological detection systems at U.S. facilities around the world. Under the terms of the contract, AAI will provide operation, maintenance and total supply support services for biological detection systems at more than 50 U.S. Army, Navy and Air Force locations in the Middle East, Europe and Asia.

* Hanger Orthopedic Group, a Bethesda maker of prosthetic devices, said it was delaying release of its earnings from yesterday until Monday "in order to complete certain accounting reviews. These accounting matters have no relation to the allegations of billing discrepancies at the patient care center in West Hempstead, N.Y., and preliminary findings of the independent investigation are being announced in a separate news release."

Compiled from reports by Washington Post staff writers.