In 2011, Pacific Northwest National Laboratory (PNNL), working as a partner in the National Advanced Biofuels Consortium, issued a report assessing the viable industrial feed system and pump options for a 2000 dry metric tons per day production-scale hydrothermal liquefaction (HTL) plant (Berglin et al. 2012). This report was issued as PNNL-21981, Review and Assessment of Commercial Vendors/Options for Feeding and Pumping Biomass Slurries for Hydrothermal Liquefaction, and will be referred to as ?Pump Survey? for reference. It had the following scope: ? Identify relevant applications and industries operating at comparable scales ? Interact with commercial vendors and pursue integration between vendors ? Take advantage of commercial off-the-shelf (COTS) technology ? Supply and support vendor needs for biomass feedstock rheology characterization ? Provide vendors with process requirements to support selection of conceptual design for feedstock handing and pump system ? Obtain cost data to the extent possible from equipment vendors to support the technical economic analysis (TEA) ? Identify issues associated scale-up. The current document represents an update to the prior report in order to: 1. Identify advancements in vendor-reported technologies 2. List reports of new experience or trials with biomass pumping applications 3. Determine if technology/application gaps identified in the prior report have been filled 4. Capture ideas on future research.