Sallie Krawcheck, the head of Citigroup's wealth management unit, is expected to step down from the company, according to people familiar with the matter. The timing of Krawcheck's departure isn't clear, the people said.

Krawcheck, 43 years old, will become the latest in a string of top executives to leave Citigroup since Vikram Pandit became chief executive last December. She doesn't have another job lined up.