The aim of this study is to examine the performance of SEOs and investigate whether the variation of SEOs' performance can be explained by firm characteristics. We find that the winners of IPOs issuing market may not always be the ones in SEOs. Long-term performance of SEOs for firms with higher growth opportunity does not only beat the market portfolio, but also significantly outperform firms with lower growth opportunity. Moreover, the subsequent performance of insiders who overbought before SEO's declaration date will be higher than those who oversold. Based on our findings, the asymmetric information on SEOs equity financing will be alleviated by investigating growth opportunity and the variation of insider' share-holdings and then investors can formulate their investing strategy accordingly.