Komag's ( KOMG) third-quarter earnings more than tripled from a year ago on swelling demand for high-capacity hard drives in new personal computers.

The San Jose, Calif., company earned $32.0 million, or 97 cents a share, in the quarter, compared with $9.3 million, or 31 cents a share, a year ago. Sales jumped 76% from last year to $180 million. Analysts surveyed by Thomson First Call were forecasting earnings of 94 cents a share on sales of $179.5 million.

"A favorable product mix shift to higher sales of advanced 3.5-inch disks at 100-gigabytes and greater, combined with an increase in sales of aluminum substrates, led to a record level revenue of $180.0 million and a 17.8% net margin," the company said.

The company forecast fourth-quarter revenue of $183.6 million to $187.2 million and said its net margin should be 17% to 18%. Analysts pegged fourth-quarter revenue at $185.5 million.

"Overall demand continues to be very strong entering the traditionally seasonally strong fourth quarter," it said. "Our capacity expansions are currently progressing on schedule. We expect to have a limited amount of incremental capacity from our first expansion in the later part of the fourth quarter of 2005."

The stock closed at $27 Wednesday.

More from Technology

Throwback Thursday: Intel Edition

Throwback Thursday: Intel Edition

Video: What Oprah's Content Partnership With Apple Means for the Rest of Tech

Video: What Oprah's Content Partnership With Apple Means for the Rest of Tech

Intel CEO's Surprise Exit Leaves 'Large Void' That Won't Be Easy to Fill

Intel CEO's Surprise Exit Leaves 'Large Void' That Won't Be Easy to Fill

The Winners and Losers in Thursday's Market

The Winners and Losers in Thursday's Market

Will Porsche's Electric Car Push Take Down Tesla?

Will Porsche's Electric Car Push Take Down Tesla?