The fact that corporate reputations deliver tangible shareholder value has been recognised by managers for some time. More recently, techniques have emerged that allow them to measure just how much value reputation delivers and identify the driving factors in order to structure communications and corporate messaging accordingly. While these techniques are having a marked affect on how companies are managing their reputation assets their use also has implications for investors. This paper uses reputation data to analyse the share price performance of companies identified as over- or under-valued. Evidence is found that where reputations are such that they suggest the companies are under-valued, that over time their market capitalizations grow at a greater rate than those whose reputations suggest over-valuation. This implies company reputation can be a powerful leading edge indicator to estimate investor returns and thus contribute to fund management.