X0303 4 2010-08-13 0 0001056358 MANNATECH INC MTEX 0001161280 FREDRICK J STANLEY 600 SOUTH ROYAL LANE SUITE 200 COPPELL TX 75019 1 0 1 0 Right to Purchase Common Stock 15.13 2010-08-13 4 D 0 12000 0 D 2012-06-13 Common Stock, Par Value $0.0001 per share 12000 83068 D Right to Purchase Common Stock 6.03 2010-08-13 4 D 0 3300 0 D 2018-06-18 Common Stock, Par Value $0.0001 per share 3300 79768 D Right to Purchase Common Stock 2.71 2010-08-16 4 A 0 3922 0 A 2015-08-15 Common Stock, Par Value $0.0001 per share 3922 83690 D Options Vest 1/3 immediately, 1/3 on every year thereafter for 2 years. On August 16, 2010, the issuer canceled, pursuant to the issuer's option exchange program, an option for 12,000 shares of Mannatech common stock granted to the reporting person on June 14, 2007. In exchange, the reporting person received a replacement option, for 1,789 shares, having an exercise price of $2.71 a share. On August 16, 2010, the issuer canceled, pursuant to the issuer's option exchange program, an option for 3,300 shares of Mannatech common stock granted to the reporting person on June 19, 2008. In exchange, the reporting person received a replacement option, for 2,133 shares, having an exercise price of $2.71 a share. The option vests in three equal annual installments beginning August 16, 2011. /s/ Stephen D. Fenstermacher, Co-CEO and CFO, by Power of Attorney 2010-08-17