WHI may refer to: W Holding Company, a failed bank holding company in Puerto Rico whose former NYSE ticker symbol was WHI Walgreens Health Initiatives, a Pharmacy Benefit Management subunit of Walgreens Health Services Waterloo Hydrogeologic Inc., a groundwater software, training and consulting company Women's Health Initiative, a large, longitudinal study of the health of women. Women's Health Issues (journal), an academic journal on women's health