Quantitative hedge fund manager Man AHL has released Arctic, its MongoDB-powered financial tick store, on code collaboration and management site GitHub as a freely available open source project. By building Arctic on MongoDB, Man AHL realised a 40x cost saving when compared to the legacy time series data store. Processing performance improved by 25x. Man AHL is based in London, Hong Kong, Oxford and Pfäffikon, and has USD17.9 billion in assets under management as of September 2015.