X0306 4 2016-06-30 0 0001056358 MANNATECH INC MTEX 0001414010 BALA ALFREDO 600 S. ROYAL LANE SUITE 200 COPPELL TX 75019 0 1 0 0 CEO and President Common stock, par value $0.0001 per share 2016-06-30 4 S 0 1128 20.055 D 10030 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.000 to $20.080, inclusive. The reporting person undertakes to provide Mannatech, Incorporated, any security holder of Mannatech, Incorporated, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this Form 4. /S/ Diane Barton, Attorney in Fact 2016-06-30