LONDON—European startups have had a bumper few months, raising €2.1 billion (more than $2.8 billion) from venture-capital investors in the second quarter of 2014, the highest quarterly total since 2001, according to data from Dow Jones Venture Source. The influx of funding into privately held European companies echoes a similar investment boom in the U.S., where private companies raised $13.8 billion in venture capital in the same period, according […]