Hedge fund managers worldwide have shown a growing interest in disassociating themselves from many of the operational aspects of their business. An estimated 90% of hedge fund managers are already outsourcing their back-office fund administration, accounting, and shareholder servicing to a fund administrator. However, the middle-office functions (loosely defined as post trade but presettlement) have traditionally remained in-house. This practice is changing as fund managers deal with the complexities of reconciling higher volumes of more complex trades and the strain that this puts on staff and IT. At the same time, service providers have improved their capabilities in many of the middle-office functions and now offer a compelling choice for their hedge fund clients. Both fund administrators and prime brokers have their eyes on this market, setting the stage for what may be the next battle in buy-side outsourcing. This TowerGroup Research Note analyzes the growing demand for outsourced middle-office capabilities.