NEW YORK -- Stocks that were moving substantially or trading heavily Friday on the New York Stock Exchange and Nasdaq Stock Market.
Aon Corp., down 94 cents at $27.82
The company received a subpoena from New York's attorney general for information regarding compensation contracts between insurance brokers and insurance companies.
Schlumberger Ltd., down $2.14 at $61.70
The oil services company reported strong revenue growth but also expressed doubts about drilling in Venezuela due to political problems there as well as contractual concerns.
Scientific-Atlanta Inc., up $2.41 at $35.96
The electronic equipment maker reported that net income per share doubled from a year ago, largely on higher sales of digital video recorders.
Callaway Golf Co. down $1.94 at $18.01
The company reported first quarter profits late Thursday of 64 cents per share excluding one-time items, well below the 70 cents per share expected by analysts.
L.M. Ericsson Telephone Co., down $2.76 at $29.49
The mobile phone maker delivered stronger-than-expected operating earnings in its first quarter but also issued cautious guidance, saying full-year sales growth could be below the 9 percent rate seen in the first quarter.
Microchip Technology Inc., up $4.30 at $32.63
Reported that fourth quarter profits jumped 42 percent and raised its dividend rate by 14 percent.
Ceradyne Inc., up $3.24 at $31.94
The company reported that revenues increased 91 percent in its first quarter compared with the same period a year ago, and said it expects more demand for its lightweight ceramic armor.