In-stream data load in a replication environment includes extracting source data from a source data store that is in a replication relationship with a target data store. A replication facility replicates to a target system changes made to the source data store. The replication facility includes a replication engine that reads a replication log into which the replication facility records the changes and sends the changes to the target system for application to the target data store. The extracting is performed by an extract utility separate from the replication engine. The in-stream data load also includes injecting, by the extract utility, the extracted source data into the replication log in-line with the changes recorded in the replication log by the replication facility and according to a format such that the replication engine can read and send the source data to the target system.