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- 1975 : Mr. Pravit Chiruppapa founded Ag-gro groups on the 4th of December 1975
- 1982 : Established Saima Chemical Co.,Ltd. on September 22, 1982
- 1983 : Built its own manufacturing factory on the 1st of July 1983 at the Bangpoo Industrial Estate, 302 Moo 4 , Soi 5C , Pattana 3 Road , Tambon Praeksa, Amphur Muang , Samutprakan Province , 10280
- 1989 : Awarded the Best Factory from the Ministry of Industry
- 1993 : On the 19th of April 1983, the company moved the headquarter to 22nd Floor , Charn Issara Tower 2 , 2922 / 268 New Phetchburi Road, Bangkapi, Huay Khwang, Bangkok 10310
- 2010 : - Awarded ISO 9001:2008 Certified
- Built an Office Building at the factory - 2012 : Awarded white factory , Department of Labour Protection and Welfare, Ministry of Labour
- 2013 : Awarded Manufacturing Development to Improve Competitiveness Program (MDICP) under Department of Industrial Promotion, Ministry of Industry
- 2014 : Awarded ISO/IEC 17025 : 2005 Certified
- 2015 : Awarded the Prime Minister's Industry Award 2015 from the Ministry of Industry. By the Department of Industrial Promotion
- 2016 : - Awarded the Prime Minister's Industry Award 2016 from the Ministry of Industry. By the Department of Industrial Promotion
- Awarded the Outstanding SMEs Award from the 8th National SMEs Awards Contest by the Office of Small and Medium Enterprises Promotion (OSMEP)
- Awarded the Outstanding Factory Award according to "The project to promote public participation in factory directing" (White Flag, Green Star) from the Industrial Estate Authority of Thailand Ministry of industry - 2017 : - Awarded ISO 14001:2015 Certified
- Awarded Green Industry certified , Ministry of Industry
- Awarded Thailand Trust Mark Symbol - 2018 : - Awarded Thailand ICT Excellence Awards under Thailand Management Association (TMA)
- Awarded the Outstanding SMEs Award from the 10th National SMEs Awards Contest by the Office of Small and Medium Enterprises Promotion (OSMEP)