Yahoo! Inc. (YHOO: chart) said after market close Tuesday that its quarterly profits swelled from a year ago, boosted by strength in online advertising and a gain from the sale of a stake in Google Inc. The Internet giant announced net earnings of $373 million, or 25 cents a share, for the fourth quarter of fiscal 2004. Excluding the investment sale, Yahoo earned $187 million, or 13 cents per share, for the quarter ended December 31, which represents a nearly 150% surge compared with year-earlier profits of $75 million, or 5 cents per share. Quarterly revenue soared 62% from last year to $1.078 billion. Excluding traffic acquisition costs, revenue rose to $785 million from $511 million. The average analysts’ forecast was for a profit before items of 11 cents per share, on revenue of $755.7 million. For all of 2004, the Sunnyvale, California-based company posted net income of $840 million, or 58 cents per share. Earnings, excluding items, were $526 million, or 36 cents per share, up from $238 million, or 18 cents per share, in 2003.

Yahoo shares gained 48 cents on Tuesday to $37.18. The stock rose 1.61% to $37.78 in after-hours trading.

International Business Machines Corporation (IBM: chart) reported after the bell Tuesday an increase in its quarterly earnings, helped by strong international sales and favorable currency exchange rates. The Armonk, New York-based world’s top provider of computer hardware posted net income of $3.1 billon, or $1.81 a share, for its 2004 fourth quarter, in contrast to net income of $2.71 billion, or $1.56 a share, for the same quarter a year ago. The earnings outpaced by a nickel a share Wall Street’s consensus estimate. For the quarter ended December 31, revenue improved 7% to $27.67 billion from $25.9 billion, last year. Excluding the benefit of the weaker U.S. dollar, revenues were up 3%. Analysts were looking for sales of $27.5 billion, on average. For the full fiscal year, IBM announced a net profit of $8.43 billion, or $4.93 per share, compared with $7.58 billion, or $4.32 per share, generated in 2003. Annual revenues rose to $96.50 billion from $89.13 billion.

The stock closed Tuesday at $94.90, up 80 cents, or 0.85%. IBM shares added 20 cents to $95.10 in after-market trade.

Advanced Micro Devices, Inc. (AMD: chart) announced Tuesday that it swung to a fourth-quarter net loss of $29.96 million, 8 cents per share, from a prior-year profit of $43.19 million, or 12 cents per share, hurt by charges and low prices for its flash memory chips for cellular phones. The Sunnyvale, California-based chipmaker had a profit, excluding items, of $20 million, or 5 cents per share, in the quarter ended December 26, missing the mean analysts’ estimate of 8 cents per share. Quarterly sales edged up 5% to $1.26 billion.

AMD shares rose 2.24% to close Tuesday at $15.50. The stock shed 22 cents to $15.28 in the extended session.

Motorola, Inc. (MOT: chart) of Schaumburg, Illinois, posted Tuesday quarterly income that advanced 34% from a year earlier, driven by surging sales of its new mobile phones. The world’s No.2 maker of wireless handsets rolled out a fourth-quarter profit of $654 million, or 27 cents a share, against a profit of $489 million, or 20 cents a share, for the 2003 equivalent. The results were 3 cents a share ahead of the average analysts’ forecast. Sales for the quarter jumped 27% to $8.84 billion.

The stock gained 40 cents to $17.43 at market close Tuesday. Company shares dipped 3.04% to $16.90 in after-hours trading.

Juniper Networks, Inc. (JNPR: chart) on Tuesday turned in net income of $66 million, or 11 cents per share, for its fiscal fourth quarter, in contrast to income of $14.7 million, or 3 cents per share, for the 2003 corresponding period. Pro forma earnings came to $85.9 million, or 15 cents per share, compared to $27.7 million, or 6 cents per share, generated last year. Analysts expected the maker of Internet routing equipment to earn 14 cents a share. Sunnyvale, California-based Juniper attributed the results to solid sales, which more than doubled in the quarter to $430.1 million from $207.0 million.

Juniper shares dropped 14 cents on Tuesday to $26.46. The stock was up 1.47% to $26.85 in extended trade.

Seagate Technology (STX: chart) reported Tuesday a 30% slump in its quarterly earnings, due to higher costs. The Scotts Valley, California-based manufacturer of computer hard drives said its second-quarter net income dropped to $144 million, or 29 cents a share, from $205 million, or 41 cents a share, last year. Despite the drop, the earnings were above Wall Street’s average estimate of 24 cents per share. Quarterly revenue advanced to $1.85 billion from $1.76 billion.

The stock closed Tuesday up 53 cents, or 2.97%, at $18.35. Company shares lost 6 cents to $18.29 in after-market trade.

Linear Technology Corporation (LLTC: chart) of Milpitas, California, posted Tuesday a net profit of $102.8 million, or 33 cents per share, for its fiscal second quarter, which compares to a profit $74.3 million, or 23 cents per share, for the same period a year ago. The earnings of the analog chipmaker topped by a penny a share the mean analysts’ forecast. The company said results were due to strong revenue, which increased to $250 million in the quarter from $186 million.

Linear shares edged up 13 cents to close Tuesday at $37.04. The stock added 8 cents to $37.12 in extended-hours trading.

Teradyne, Inc. (TER: chart) said Tuesday that it reversed course to a quarterly profit from a prior-year loss, driven by improved demand for its semiconductor testing equipment. The Boston, Massachusetts-based company announced earnings of $3.3 million, or 2 cents a share, for its fourth quarter, rebounding from a loss of $11.5 million, or 6 cents a share, for the 2003 corresponding period. Quarterly sales rose to $377 million from $357.6 million.

The stock gained 14 cents to $15.34 at market close Tuesday. Company shares slipped 1.96% to $15.04 in after-market trade.