X0306 4 2014-08-14 0 0001056358 MANNATECH INC MTEX 0001537702 Nicholls Steven Mark 600 S. ROYAL LANE SUITE 200 COPPELL TX 75019 0 1 0 0 CFO Common Stock, Par Value $0.0001 Per Share 2014-08-14 4 P 0 1100 12.3509 A 2400 D Common Stock, Par Value $0.0001 Per Share 2014-08-15 4 M 0 1666 5.72 A 4066 D Common Stock, Par Value $0.0001 Per Share 2014-08-15 4 P 0 934 12.445 A 5000 D Right to Purchase Common Stock 5.72 2014-08-15 4 M 0 1666 0 D 2023-02-21 Common Stock, Par Value $0.0001 Par Share 5000 3334 D The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $12.35 to $12.36, 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 purchased at each separate price within the ranges set forth in footnotes (1) and (2) of this Form 4. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $12.40 to $12.45, inclusive. The options vest in three equal annual installments beginning February 21, 2014. /s/ S. Mark Nicholls 2014-08-15