組圖：40位40歲以下的商界精英

1. 瑪麗莎?梅耶爾

?? 年齡：38

?? 職務：總裁兼CEO

???任職公司：雅虎公司

????“量力而行”是梅耶爾的做事原則。正是這種職場哲學為她改造雅虎（Yahoo）的工作提供了源動力。去年，在離開工作了十多年的谷歌（Google）后，37歲的梅耶爾加盟雅虎，承擔起改造雅虎的重任。梅耶爾替換了雅虎關鍵職位的高管，進行了一系列收購【目前已進行22筆收購，包括11億美元收購微博客Tumblr（參閱第24位）】，徹底改造雅虎的文化與人力資源規則，希望能重新為雅虎注入創新活力。增加營收是她面臨的挑戰之一，不過，這位“40位40歲以下商界精英”排行榜新科狀元的做法已經贏得了投資者的歡心：自從梅耶爾入主雅虎以來，這家公司得股票已經上漲了86%。

1. Marissa Mayer

?? Age:38

?? Title:President and CEO

?? Company:Yahoo

????"Get in over your head" is Mayer's guideline. It's this career philosophy that has fueled her turnaround effort at Yahoo since she joined the company as CEO last year, at age 37, after more than a decade at Google. Mayer has replaced key Yahoo executives, made a string of acquisitions (22 so far, including Tumblr—see No. 24—for $1.1 billion), and overhauled Yahoo's culture and HR rules (its logo too) in an effort to make the company innovative again. Revenue growth is her challenge, but investors like what our newly crowned No. 1 has done: The stock is up 86% since she came in.