15 Most Undervalued NASDAQ Stocks to Buy According to Wall Street Analysts

4. ACI Worldwide Inc. (NASDAQ:ACIW)

ACI Worldwide Inc. (NASDAQ:ACIW) is one of the 15 Most Undervalued NASDAQ Stocks to Buy According to Wall Street Analysts.

ACI Worldwide released its Q4 earnings report on February 26. The release showed an earnings miss, with diluted adjusted earnings per share falling 17% to $0.90 (vs. the street consensus of $1.01). This miss was largely attributable to the deterioration in profit margins, specifically due to the growth in general and administrative expenses significantly outpacing the increase in revenue.

As for revenue, ACIW saw high-single-digit revenue growth, which beat analysts’ expectations. The “Biller” segment led the way, growing in the low teens (both for total revenue and recurring revenue). The “Payment Software” segment, meanwhile, lagged, growing in the low single digits. This revenue beat, however, was not enough to offset the hit from the higher administrative costs.

Management also provided its guidance for 2026. They expect revenue to grow between 6.9% and 8.5%, reaching $1.88 billion to $1.91 billion for the full year. This range is slightly above analyst estimates of $1.86 billion.

They expect adjusted EBITDA to grow between 4.7% and 8.7%, reaching $530 million to $550 million for the full year. This EBITDA range, combined with the revenue range, implies that management thinks the margin issues will persist in 2026.

ACI Worldwide Inc. (NASDAQ:ACIW) develops, markets, installs, and supports software products and solutions focused on facilitating real-time electronic payments. The company is based in Elkhorn, NE, and was founded in 1975.