Resumen-The article analyses the sustainability of frozen squid exports from Peru between 2019 and 2023, evaluating the diversification of markets and exporting companies using the Herfindahl-Hirschman Index (HHI). Globally, there was a trend towards diversification, with a reduction in the Herfindahl-Hirschman Index (HHI) from 1379 to 957. In Peru, exports showed a significant recovery after the Coronavirus disease 2019 (Covid-19) pandemic, albeit with a high concentration in the Chinese market, which represented a growth of 361.5% between 2020 and 2023. The research under discussion highlights challenges related to dependence on specific markets and companies, as well as the need to diversify destinations and promote sustainable practices to reduce economic vulnerability. In methodological terms, a descriptive analysis was carried out based on VERITRADE export data, showing that Piura leads national exports, while other regions such as Ica and Lambayeque face significant declines. The study concludes that, although initial diversification is positive, recent concentration represents a risk, and recommends strategies to promote market diversification, support for new export companies, and the strengthening of the sector's environmental and economic sustainability.