John Barr has managed the Needham Aggressive Growth Fund since January 2010. In an interview with MarketWatch, he described the fund’s strategy of identifying “hidden compounders” among smaller companies and sticking with them through their stages of growth, and even through rough patches. This low-turnover approach has led to stellar performance.
The Needham Aggressive Growth Fund was launched in 2001 and has $179 million in assets under management. Both of its share classes are rated five stars — the highest rating — within…