Walmart recently completed its first stock split in over 20 years, and Chipotle is planning its first-ever stock split in June to make shares more affordable for employees and reach more investors. Both companies say the stock splits are intended to encourage more employee stock ownership through employee stock purchase plans with discounts. However, experts say low wages may limit many employees' ability to invest beyond basics like food and rent, even with stock splits and ESPPs. Financial education is also key to boosting employee participation in stock plans, but most employers don't offer robust education programs.