Nearly 40% of leaders report insufficient sleep four or more nights a week, according to the research. The finding covers leaders broadly, without restricting the sample to a single sector or seniority band, and notes that the effects reach beyond the individual leader’s own output.
The research was published by Harvard Business Review on 6 October 2026, under the headline “Research: Sleep Deprivation Is a Leadership Problem.”
Source: Harvard Business Review, 2026-10-06.