According to a Bloomberg report Wednesday, the U.S. Securities Exchange Commission is examining Apple's public statements about Jobs' health to determine whether the company misled investors. The report, which cited an unnamed source "familiar with the matter," said the review does not mean the SEC has seen evidence of wrongdoing. The SEC declined to comment on the report.

It is unclear how much detail others in the company know about Jobs's condition, but he sought to reassure employees and shareholders that the board is behind him. "As CEO, I plan to remain involved in major strategic decisions while I am out," he wrote in last week's letter to employees. "Our board of directors fully supports this plan."