The Marshfield Concentrated Opportunity Fund is up in 2025 and beating the S&P 500 on a three and five year basis. Two of the portfolios managers dish the fund’s secrets.The Marshfield Concentrated Opportunity Fund is up in 2025 and beating the S&P 500 on a three and five year basis. Two of the portfolios managers dish the fund’s secrets. The Marshfield Concentrated Opportunity Fund is up in 2025 and beating the S&P 500 on a three and five year basis. Two of the portfolios managers dish the fund’s secrets.   Read More MarketWatch.com – Top Stories