While at Cambridge University, Grainger founded life sciences companies including FingerPrint Diagnostics (2001),[12] and Funxional Therapeutics (2005).[13] FingerPrint Diagnostics merged with SmartBead Technologies to form Pronostics, a molecular diagnostics company, in 2006.[12][14] Funxional Therapeutics, based on an anti-inflammatory drug candidate spun-out from Grainger's Cambridge University lab, became an Index Ventures portfolio company where Grainger also served as chief scientific officer[13] until it was sold to Boehringer Ingelheim in 2012.[15]
Grainger joined Index Ventures in 2012,[16] and a blogger on topics related to the pharmaceutical industry under the pen name “DrugBaron”.[17] where he was involved with funding and advising a variety of companies, including XO1,[18] a biotech company developing an anticoagulant, where he served as chairman and interim CEO before it was sold to Johnson & Johnson[19][20][21] He co-founded medicxi in February 2016 with fellow former Index Ventures partners Francesco De Rubertis, Kevin Johnson and Michele Ollier.[1][22]
Grainger formerly blogged under the pen name “DrugBaron” on a range of topics related to the pharmaceutical industry,[26] and now has a column on similar topics on Forbes.com.[5]
^Brindle, Joanne (2002). "Rapid and noninvasive diagnosis of the presence and severity of coronary heart disease using 1H-NMR-based metabonomics". Nature Medicine. 8 (12): 1439–1444. doi:10.1038/nm1202-802. PMID12447357. S2CID8676147.