Shares of Apple surged 3.5 percent last week — to an all-time high — as the company geared up for taking pre-orders on its much-anticipated iPad tablet.

Apple closed Friday at $226.60, up 135% in the last year.

The tech giant, headed by Steve Jobs, now has a market capitalization of $205.5 billion, passing Wal-Mart and Berkshire Hathaway during the week.