RSM Tenon was a professional services firm based in the
United Kingdom, which was once listed on the
FTSE SmallCap Index. The company was formed from the merger of the Tenon Group with RSM Bentley Jennison in December 2009. The company offered risk management, tax, recovery, financial management and business advisory services. RSM Tenon had been the UK's seventh largest accounting firm with a fee income of £200m, employing nearly 2,600 people in over 35 offices across the UK.