4. Jacob Internet Fund ( JAMFX), up 40% this year. This $47 million fund has gained 28% in the past three months. It holds 33 stocks, and 47% of fund assets are in the top 10 holdings. Portfolio turnover is a relatively languid (at least for this sector) 52%. Up 72% last year, the fund lost 51% in 2008. Its top holdings fit the technology-stock stereotype: Apple ( AAPL), at 7.6% of the fund, Google ( GOOG), at 5%; LogMeIn ( LOGM), a provider of online solutions that enable remote access and support to computers and electronic devices connected to the Internet, at 4.7%, which is up 135% this year; and the self-described online network for geeks, Geeknet ( GKNT), at 4.5%, and up 100% this year.