How did Ecovyst's revenue and expenses trend in Q4 2024 compared to previous quarters?

Ecovyst's revenue and expenses for Q4 2024 are as follows:

In Q4 2024, Ecovyst's total revenue increased to $704.49 million, up from $522.53 million in Q3 2024 and $343.36 million in Q2 2024, indicating a clear upward trend in revenue over the past three quarters. However, the total expenses for Q4 2024 are not provided, which makes it difficult to assess the company's profitability for that quarter compared to previous quarters.