Southern Agro Export Corporation (SAGREX) was registered with the Security and Exchange Commission (SEC) in August 1979 and started business in Davao City in January 1980. It started out as a trading and export company of rice, corn, coffee, copra and other agricultural products; exporting castor seeds, cottonseeds and cattle feeds such as Ipil-ipil leaves and cassava chips. It evolved into a well diversified, dynamic company, distributing GROW MORE NPK premium foliar fertilizers and LIQUID chelated natural organic micronutrient. Later ventured into manufacturing low-density polyethylene (PE) foam for insulation of households and commercial buildings and as packaging material of exportable fresh tropical fruits and vegetables.

In 1994, SAGREX ventured in distributing E-WHA Foam Products in Davao City. After successfully introducing P.E. Foam as cushioning pad for export of fresh Cavendish banana, SAGREX in partnership with E-WHA Foam established the first P.E. Foam manufacturing plant for Visayas-Mindanao in Davao City. However, with the increasing demand for P.E. Foam Insulation in Metro Manila Calabarzon area a strategic decision to transfer its PE. Foam manufacturing to Carmona, Cavite was made in 1997.

In May 29, 2000, the SEC approved the change of its corporate name from Southern Agro Export Corporation to SAGREX CORPORATION.

In July 2002, due to increasing market demand, SAGREX built its own factory building at a 2,800sqm property in Dasmarinas Techno Park, Dasmarinas, Cavite; and ordered a bigger P.E. Foam extruder from Korea. The original extruder machine was brought back to Davao City to be more competitive serving the packaging needs of export fresh Cavendish Banana and also catering to the insulation needs of residential houses and commercial buildings.

In 2002, SAGREX CORPORATION was appointed by RB Fields of Malaysia as exclusive distributor in the Philippines of its complete line of sprayers. It successfully introduced to the market 3-brands of Matibay Sprayers namely the Junior Matibay, Standard Matibay and the Super Matibay Knapsack Sprayers. It also started developing truck mounted boom sprayers to address the need of banana plantations of alternatives to the aerial sprayers for SIGATOKA control. It successfully launched its own SAGREX truck mounted sprayers in 2004, where it was able to pass the test of Del Monte, Dole, AMS Farms and Lapanday SIGATOKA Banana spraying standards.

SAGREX Corporation started a partnership with DOST XI in early 2004 in developing a process to extend the shelf life of Philippine Native Saba banana by blast freezing. In May 2005, SAGREX put up an IQF Blast freezer to process microwavable frozen banana and banana fries for export. A new company SAGREX FOODS INC. was registered with the SEC in October 2005. At present it has a capacity to process 100 kilos per hour of Frozen Bananas and Banana Fries in its plant site at TCG Compound, Sasa, Davao City. It plans to expand operation to produce 1000 kilos per hour (12 metric tons/day) in its new 2 hectare plant site in Toril, Davao City in the middle of 2007.