N-able Inc. (NYSE:NABL) is one of the most promising penny stocks under $5 to buy. On February 19, N-able reported earnings for Q4 and the full year of 2025, reaching $130 million in quarterly revenue and a total ARR of $540 million. The company achieved a consistent 30% adjusted EBITDA margin throughout the year, supported by a healthy gross margin of 81%. The company also saw a 14% year-over-year increase in its higher-value customer segment, now totaling over 2,600 partners contributing $50,000 or more ...