Williams, was finance director at Selfridges since 1991, before stepping up to the top position at the end of February 2003.
He departs just nine months after Canadian tycoon Galen Weston bought the business for $628m (£342m).
Williams will be replaced by Paul Kelly, head of Selfridges’ Irish sister store Brown Thomas, while Allan Leighton, one of the most prolific non-executive directors in the UK (BskyB, Lastminute.com, Royal Mail) will become deputy chairman.
Does Darwin's theory apply to taxation? Colin ponders...
The EC has been instructed to draft a European Union (EU) directive authorising an EU financial transaction tax, which would apply to ten of the EU’s 28 member states
Accountancy watchdog the FRC has dropped its investigation into the former chief financial officer of Tesco, nearly two years after the supermarket was engulfed in an accounting scandal
Colin imagines how Apple's logo might change in the wake of the EC's ruling over its Irish tax arrangements