Exhibit 99.1 Kelly Reports First-Quarter 2024 Earnings • Q1 operating earnings of $26.8 million, or up 34% on an adjusted basis • Q1 revenue down following sale of European staffing operations; down 2.6% on an organic basis • Q1 adjusted EBITDA margin increased 110 basis points to 3.2% driven by meaningful reduction in operating expenses resulting from business transformation initiatives and sale of European staffing operations • Company expects further expansion of EBITDA margin from the planned Q2 2024 ac ...