Median "pre-money" valuations — the value ascribed to a company before it takes new money — jumped more than 50 percent in venture rounds raised by San Francisco-area companies last year, according to a report from the venture activity tracking firm PitchBook. A particularly dramatic example of the trend was MixPanel, a five-year-old mobile and web data analytics platform in San Francisco. It recently raised a $65 million Series B round of funding at a whopping $800 million "pre-money" valuation. That's more than 24 times the company's previous valuation.
