This study examined the compositional change of five specialty soybean genotypes, which are low in oligosaccharides, high in oil, high in protein, large seeded or small seeded, along with two commercial cultivars, Jack and Ozark, during seed development and maturation. Seeds were sampled at 7-day intervals from initial seed formation to full maturity for approximately 8 weeks, and analysed for oil, protein, soluble saccharides, and starch.