This study investigates the relationship between company-specific risks and post-initial public offering (IPO) financing decisions of publicly listed companies in Taiwan. The empirical results suggest that firms with higher idiosyncratic risks tend to raise more funds but engage in fewer SEO activities within two years. This propensity may stem from the heightened idiosyncratic risks magnifying investor disparities and information asymmetry, thereby prompting companies to capitalize on potentially overvalued stock prices through cash capital increases opportunistically. However, the analysis also reveals that higher idiosyncratic risk correlates with fewer SEOs, as riskier firms may curtail subsequent issuances to avert the perception of issuing overvalued shares. Moreover, factors such as company size, profitability, financial leverage, and market valuation significantly influence both the timing and returns of SEOs. The findings highlight the importance of idiosyncratic risks for newly listed companies in their decisions regarding SEOs.