Tidewater's stock surged 6.35% in after-hours trading following the release of its fourth-quarter 2025 financial results, which significantly exceeded analyst expectations.

The offshore services company reported quarterly earnings of $4.41 per share, beating the consensus estimate of $0.83 by 428.78%. This represents a 530% increase compared to earnings of $0.70 per share from the same period last year. Additionally, Tidewater reported quarterly sales of $336.800 million, surpassing the analyst estimate of $334.418 million by 0.71% and marking an 11.28% year-over-year increase.

The strong earnings performance, highlighted by substantial beats on both top and bottom lines, appears to be the primary driver behind the stock's after-hours surge as investors react positively to the company's financial results.