Getty ImagesPrimark boss Paul Marchant has resigned following an allegation by a woman about "his behaviour towards her in a social environment".
Associated British Foods (ABF), which owns Primark, said following an investigation by external lawyers, Mr Marchant "acknowledged his error of judgement and accepts that his actions fell below the standards expected" by the business.
Mr Marchant co-operated with the investigation and apologised to the individual, said ABF.
George Weston, chief executive of ABF, said: "I am immensely disappointed. Colleagues and others must be treated with respect and dignity. Our culture has to be, and is, bigger than any one individual."
He added: "At ABF, we believe that high standards of integrity are essential. Acting responsibly is the only way to build and manage a business over the long term."
The company said it remains in contact with the individual "who rightly raised her concerns and have offered her our support".
