Joe Bruderek
Analyst · Sidoti & Company
Thank you, Eric, and good morning, everyone. I would like to thank Milt for his guidance and tremendous partnership in recent months, and I am honored to succeed him as CFO. It is clear that we have a great team in place at every level of the organization, and I'm excited about the significant opportunities that lie ahead.
Diving into the results in the first quarter, sales of $257.5 million decreased almost 9% and organic sales declined 12%, driven primarily by lower results in the AST segment due to ongoing softness in semiconductor. First quarter adjusted EBITDA of $58.4 million decreased roughly 15% compared to the prior year period. Adjusted EBITDA margin of 22.7% decreased 160 basis points year-over-year. These revenue declines were partially offset by strength in certain resilient markets, strategic pricing, cost mitigation and continuous improvement initiatives. Again, the company showed solid management of decremental margins in the face of softness in semiconductor and commercial vehicle markets while continuing to prioritize ongoing investments to drive future growth. Corporate expenses of $12.2 million in the first quarter of 2024 were up from $11 million a year ago. Last year, reductions in share price-related incentive compensation accruals benefited corporate expense by $1.9 million. Adjusted diluted earnings per share of $1.57 decreased almost 20% from last year, largely driven by the factors impacting adjusted EBITDA.
Moving to a discussion of segment performance. Sealing Technologies sales of $171 million decreased 1%. The partial quarter's contribution from AMI, strategic pricing actions and strength in nuclear and aerospace offset softness in commercial vehicle, food and pharma and general industrial demand in Asia. Our aftermarket positions in this segment offer enduring stability and our critical and innovative solutions for a number of leading-edge applications clearly differentiate us. The segment is structurally strong with adjusted EBITDA margins exceeding 30% for the first quarter despite demand headwinds in some markets. For the first quarter, adjusted segment EBITDA increased 6.6%. Strategic pricing and sourcing actions, the partial quarter contribution from AMI, improved mix, 80/20 discipline and focus on aftermarket work and continuous improvement initiatives throughout the segment offset overall volume declines to drive the strong result. Sealing's ability to maintain robust margin performance through a sales decline reflects the strength of our market positioning and the criticality of our technology in essential applications. We are encouraged by positive order momentum in certain shorter-cycle product lines that we expect to drive improved performance in Sealing Technologies into the second quarter. Demand in our longer cycle backlog-driven solutions such as in aerospace, space exploration and sustainable power generation is growing nicely and gives us confidence for continued solid performance in the segment moving forward.
We turn now to Advanced Service Technologies. As expected, we saw a sequential and year-over-year decline in financial performance. First quarter sales of $86 million decreased 21.4%, driven primarily by continued weakness in semiconductor capital equipment spending. Portions of the segment are showing continued secular growth and recovery, while we are experiencing headwinds in certain product lines where inventory destocking could persist in coming months. Our positioning on advanced node platforms in the semi space and our ability to utilize our technological advantages and process know-how for future platforms is encouraging. We continue to invest in AST and are pleased with our strategic positioning in these critically important markets. For the first quarter, adjusted segment EBITDA decreased 41% versus the prior year period. Adjusted segment EBITDA margin remained above 20%. The volume decline was the primary driver for the year-over-year reduction in profitability. We have balanced the realities of short-term volume levels where our goals are remaining well positioned for the market upturn and investing in future growth opportunities.
Turning to the balance sheet and cash flow. We completed the AMI purchase on January 29, utilizing $210 million in available cash. In addition, we acquired the remaining non-controlling interest in Alluxa in February for $17.9 million. Our net leverage ratio, inclusive of these transactions stands at approximately 2.3 times trailing 12-month adjusted EBITDA. Free cash flow in the first quarter turned slightly negative compared to about $21 million of positive free cash flow in the prior year quarter due to the year-over-year reduction in EBITDA, timing of working capital, $5 million of incremental long-term incentive compensation payouts related to prior periods, $3.3 million of transaction fees associated with the AMI purchase and higher cash tax payments of $5 million in the quarter. We received a tax refund in the year ago quarter. For the year, we continue to expect free cash flow to exceed $100 million and capital expenditures in the $60 million range, the majority of which will be focused on growth and efficiency projects. We have strong financial flexibility to execute our strategic initiatives, both organically and through acquisitions that broaden our capabilities. Our goal is to build upon our leading-edge positions in markets with secular growth drivers that safeguard critical environments and applications that touch our lives every day. Our strong balance sheet and cash flow generation provide us with ample liquidity to make these investments while continuing to return capital to shareholders. In the first quarter, we paid a $0.30 per share quarterly dividend totaling $6.4 million.
Moving now to our 2024 guidance. Taking into consideration all the factors that we know at this time, we maintain our total year 2024 guidance issued in February. We expect total Enpro sales growth to be in the low to mid-single-digit range, adjusted EBITDA between $260 million and $280 million and adjusted diluted EPS to range from $7 to $7.80. The normalized tax rate used to calculate adjusted diluted earnings per share remains at 25% and fully diluted shares outstanding are approximately $21 million. In the Advanced Surface Technologies segment, we expect a slight sequential improvement in the second quarter. We continue to see growth in our advanced node cleaning business and positive demand signals in our Chamber tool performance coatings business. Overall, the semiconductor market appears to be stabilizing, and we are seeing signs of recovery that should drive improved results in coming periods. In Sealing Technologies, we expect an improved order patterns in certain shorter-cycle product lines, firm backlog and positive mix can offset weaker demand in commercial vehicle OEM. We expect sealing to exhibit the typical seasonal patterns where the first half is slightly stronger than the second half. We continue to anticipate that where we land within our guidance range will primarily depend on the timing and magnitude of the recovery in semiconductor. Regardless of the precise timing, we are well positioned and are making appropriate investments to drive future growth and value.
I will now turn the call back to Eric for closing comments.