Yahoo CEO Carol Bartz, speaking at the company's annual shareholder meeting Thursday, confronted investors who are losing patience with the Web portal's turnaround plan.

Chairman Roy Bostock voiced his support for Bartz, and stockholders in Santa Clara, Calif., approved Bartz's and Bostock's re-election to the board with about 80 percent of the votes. Other directors got 90 percent. Investors have expressed frustration with Yahoo's growth prospects. Yahoo's U.S. search market share has stalled at about 16 percent since December, according to ComScore.