Argon ST Inc. (STST: chart), electronic intelligence and communications systems maker, said that its fourth-quarter net earnings declined to $4.1 million, or 18 cents per share, compared with $6.06 million, or 29 cents per share, in the year-ago period. Revenue decreased to $66.1 million from $83.7 million in the fourth quarter last year.

Beacon Roofing Supply Inc. (BECN: chart), residential and nonresidential roofing materials distributor, said that its fourth-quarter net earnings increased to $14.6 million, or 32 cents per share, compared with $10.4 million, or 25 cents per share,in the same quarter a year earlier. Revenue climbed to $431.3 million from $231.2 million on the year-ago period.

Lehman Brothers (LEH: chart), financial services provider, said that its fourth-quarter net income climbed 22% to $1 billion, or $1.72 per share, compared with $823 million, or $1.38 per share in the year-ago period. Revenue jumped 23% to $4.5 billion in the fourth quarter last year. The company\''s revenue exceeded the third quarter tally by 8%.

Bear Stearns Cos. (BSC: chart), investment house, reported a fourth-quarter net income of $562.8 million, or $4 per share compared with $401.5 million, or $2.90 per share, a year earlier. Revenue climbed 28% to $2.4 billion versus $1.9 billion a year earlier.