Walmart Inc. rises as much as 3.9%, the most since May 18, as members of the founding Walton family continued to sell shares of the big-box retailer as part of a plan to keep their stake under 50% amid company buybacks. The sales bring the Walton Family Holdings Trust’s stake to 11.5%; Walton Enterprises LLC remains the largest stakeholder, holding 35.7% of shares. Walmart’s shares are lagging the broader retail index rally in the last six months.