What is the oldest cosmetic company that is still in business today?

The oldest cosmetics company still in business today is Yardley London. Yardley London can trace its roots back to 1620 when Jonathan Yardley obtained a royal warrant for the provision of all the soap to City of London. Unfortunately any documentation of this warrant was lost in the great fire of London in 1666, so legally the company can only claim to have been founded in 1770, when William Yardley established the House of Yardley, which is documented. That would still predate Japanese cosmetics company Shiseido by 102 years.