Abstract: A computerized system, method, and computer-readable medium implementing a method for aggregating orders for items to be filled is presented. Given a plurality of received orders, a plurality of individual orders that are aggregatable based on one or more predetermined aggregation criteria are identified and aggregated into an aggregate order. Items combined in the aggregate order may be grouped into one or more fulfillment groups independently of the individual orders from which the items originated and comprising items from the aggregate order to be simultaneously filled.