PurposeThe study aimed to determine how reputational risk affects the stocks prices of companies listed on the Lima Stock Exchange.Design/methodology/approachThe study follows a documentary research with a quantitative approach. Companies from different sectors listed on the Lima Stock Exchange were taken as a sample.FindingsThe incidence between the reputational risk and the stock price of the companies listed on the stock market, as well as the impact on profitability indicators and income level were demonstrated. Additionally, it was determined that the cost of capital has a greater impact if the entity is financed from the issuance of bonds rather than by subsidiaries.Originality/valueCompanies that presented well-known events in Peru and those that caused damage to their corporate reputations were studied. Likewise, information from sources such as Monitor Empresarial de Reputación Corporativa, Peruvian Securities Market Regulator’s office and Lima Stock Exchange was documented in order to analyze the variations in financial indicators during the indicated events. Financial models such as CAPM and GORDON-SHAPIRO were also used.