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Small-cap fund manager John Barr gains 94% by investing in overlooked firms powering AI and defense.

Market News
06 Jun 2026
Forbes
View Source
Bullish
pluang ai news

John Barr, managing the $2.3 billion Needham Aggressive Growth Fund, achieved a 94% return last year by investing in small-cap companies that underpin AI, defense, and infrastructure. His strategy focuses on 'hidden compounders'—firms with stable core businesses quietly developing new growth areas, such as nLight's laser defense tech and Vertiv's data center equipment. Barr's long-term, patient approach, with an average holding period of about a decade, has yielded outsized returns by betting on infrastructure and skilled labor supporting the new economy. This approach highlights opportunities in less-followed companies enabling major tech and defense trends rather than chasing well-known winners.

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