We set records for adjusted EBITDA, which increased 5% from the prior period to $305 million. Adjusted diluted EPS, which improved 13% year-over-year to $0.72, exceeding our expectations, and we had the lowest net leverage in Axalta's history. Also notable is net sales growth of 3% year-over-year and an excellent adjusted EBITDA margin of 22.7%, up 30 basis points from the prior year period and the highest second quarter in many years. We delivered $152 million in cash from operations and $107 million in free cash flow, an improvement of 6% year-over-year.
The Axalta team has driven growth, controlled the controllables, and significantly improved the balance sheet. Europe, our largest Refinish region, delivered a record quarter for net sales. This represents excellent wins for Axalta and further reinforce our growth momentum. In Industrial, we're far outperforming our expectations for profitability with 13 quarters of adjusted EBITDA margin expansion, despite the choppy macro environment in North America.
In Asia, we have delivered six consecutive quarters of net sales growth driven by higher demand for Energy Solutions, and in Europe, we have posted another quarter of volume growth. In Mobility, we delivered a record quarter in net sales of $474 million, including record quarterly sales in commercial vehicle. Our commercial transportation solutions business continues to perform exceptionally well at record levels, and we're benefiting from the ramp-up in Class 8 production in North America. We are equally pleased with the consistency and profitability of the Mobility segment, which delivered an adjusted EBITDA margin of 18.4%.