Query operation of OMG trading service's require to be responsible for fast query responses. Hence, in this study, we have propose LDAP storage as a solution to support the OMG trader service in improving the performance of query response times. We are apt to use LDAP based on its core feature that provide precedence on the read performance to retrieve and search information in the distributed environment. In mitigating our suggested solution, a series of past study that underlined the benefits of LDAP, mainly in terms of being read-optimized, is described in this article. This study inspects the capability of LDAP in improving the performance of query operation in the trading service in which a performance measurement is conducted to distinguish the performance result gained from the trading service which uses LDAP as its backend storage, and the trading service that uses relational database as its backend storage. Referring to the experiments conducted, we discover that the trading service using LDAP provide a better performance as compared to the trading service with the relational database. From the outcomes, it has been further verified that there is an increase in the performance during the query operation in the trading service that uses LDAP as its backend storage.