Newsmaker: Marissa Mayer, Yahoo CEO

Marissa Mayer, president and chief executive officer at Yahoo! Inc.. Photo: David Paul Morris/Bloomberg

Independent.ie Newsdesk

In 2002, Marissa Mayer - then product manager at Google - likened the interface on the search engine at the time to a closed Swiss Army knife: "A clean, simple tool you want to take everywhere."

And now as chief executive of rival Yahoo, Mayer is wielding a scalpel in an effort to stem the company's still deteriorating condition. Last week, the firm reported a whopping $4.8bn loss for 2015 after it impaired the value of investments and assets, including Tumblr, to the tune of $4.4bn.