What strategies drove ATI's unexpected Q4 earnings surge?

ATI's unexpected Q4 earnings surge can be attributed to **Revenue Growth** and **Cost Management**.

1. **Revenue Growth**: ATI's revenue stood at $1.2 billion, higher than the estimated $1.07 billion. This indicates a strong performance in terms of sales, which contributes significantly to the company's profitability.
2. **Cost Management**: The company's ability to manage costs effectively is evident in its financial performance. Despite the revenue surge, ATI reported an EPS of $0.79, comfortably ahead of analyst expectations of $0.59. This suggests that ATI has been successful in controlling its expenses, which has led to better-than-expected earnings.

In conclusion, ATI's Q4 earnings surge can be attributed to a combination of revenue growth and cost management. The company's strong revenue performance and effective cost control have contributed to its impressive financial results.