Steph Disher
Chief Executive Officer at Cummins
Thank you, Todd, and good morning, everyone. I'm excited to join you today to share an update on Atmus. I will discuss our fourth quarter and full year financial results and our outlook for 2024. I will also share some of the significant progress we have made implementing our growth strategy. First, let's discuss our performance in the fourth quarter. We drove strong financial performance in the fourth quarter, delivering an impressive finish to our first year as a public company. Sales were $400 million compared to $385 million during the same period last year, an increase of approximately 4%.
Adjusted EBITDA in the fourth quarter was $71 million or 17.9% compared to $53 million or 13.9% in the prior period. Adjusted EBITDA for the quarter excludes $8 million of one-time standalone costs and $7 million for the same period last year. Adjusted earnings per share was $0.49 in the fourth quarter of 2023 and adjusted free cash flow was $30 million. Adjusted free cash flow excludes $4 million of one-time capital expenditures related to separation from Cummins. As expected, we saw some continued destocking and softer freight activity, which dampened revenues from our aftermarket. This was offset by continued strong demand in U.S. first-fit markets. In EMEA, markets remained strong. And in China, we saw demand slowly recovering.
Now let's review our full year results. Sales for 2023 were $1.63 billion, an increase of approximately 4% from 2022. Adjusted EBITDA margin rose 300 basis points from the prior year to 18.6%. EBITDA has been adjusted for one-time separation costs, which were $29 million in 2023 compared to $9 million in 2022. Adjusted earnings per share was $2.31 for the full year, and adjusted free cash flow was $152 million. Free cash flow has been adjusted for $9 million of one-time capital expenditures related to our separation. Turning to our global markets now; I want to share some insight into the material drivers for our business and provide you with our guidance for 2024.
Our business is diversified geographically and the length of the cycle for aftermarket and first-fit varies. In 2024, we anticipate first-fit and aftermarket will be countercyclical. Let's start with aftermarket for both on-highway and off-highway markets. As a reminder, aftermarket represents approximately 80% of our global revenue. We experienced softer freight activity and destocking during the second half of 2023 in on-highway markets. In North America, which represents a significant portion of our business, we saw the Cass Freight Index down about 9% in the second half compared to prior year, and down 5.5% over the full year.
We believe we are largely through the destocking and expect on-highway aftermarket to improve as we move through 2024, driven by growth in freight activity. In global off-highway markets we are monitoring several key industries. We expect construction in North America will be supported by resilient demand in nonresidential construction, which is aided in part by government infrastructure spending. In Europe, we expect the weakness in construction activity to continue due to overall economic conditions. And global mining markets are expected to be relatively flat from a robust 2023. Based on these market assumptions, we anticipate overall aftermarket for on-highway and off-highway to be flat to up 3%.
Turning to our global first-fit markets; our three key geographies are the U.S., China and India. In the U.S., we anticipate heavy-duty truck will be down 10% to 15%. And medium-duty truck will be flat to down 5%. We expect the first half demand will remain robust before it begins to decline in the second half of 2024. The recovery in China has been sluggish and we anticipate a continued muted recovery. We expect heavy-duty and medium-duty truck production to be in the range of down 5% to up 10%. China is the most difficult market for us to forecast, leading to this wide range in outlook. In India, we see industry demand for trucks to be flat to up 5% for the year, driven by strong on-highway performance.
As a result of these market drivers and our growth plans, we anticipate total revenue to be down 1% to up 3%, resulting in guidance for global sales in the range of $1.61 billion to $1.675 billion in 2024. We expect continued strong operational performance and to deliver adjusted EBITDA margins of 18.25% to 19.25%. Additionally, we anticipate adjusted EPS will be in the range of $2.10 to $2.35. Now I would like to take a moment to share the progress we have made on implementing our four-pillar growth strategy. The first pillar is to grow share in first-fit.
While our first-fit business represents about 20% of our overall business, it is the foundation for driving recurring revenue in our aftermarket. We are a leader in fuel filtration and crankcase ventilation products, and we are focused on growing this leadership position with global OEM customers. We are winning with the winners, and have continued to secure Cummins' new vehicle platform. As an independent company, we also have the ability to accelerate growth with other leading global OEMs. Additionally, we are continually investing in new product development.
In 2023, we opened two new technical centers for key global markets. The first center opened in Wuhan, China and our second is our Global Capability Center in Pune, India. Our second pillar is to accelerate profitable growth in the aftermarket. We are transforming our global distribution capabilities to provide our customers with industry-leading product availability. We established three new distribution centers in Brazil, Mexico and Dallas, Texas, and we have also transitioned our largest distribution center in Kentucky from Cummins. We have plans in place to establish independent distribution centers in Europe and Asia-Pacific in 2024.
Furthermore, we have a unique multichannel path to diverse global markets, which includes an exclusive agreement with Cummins to distribute our products. At the same time, we are growing our distribution network and have expanded our presence in key independent channels in north of Brazil and Mexico. This increase in channel presence will support continued growth in our aftermarket. The third pillar is transform our supply chain. We are investing in our manufacturing capacity to improve automation and provide our customers with industry-leading products.
We completed our fully automated green cartridge production line in France. In Korea, we are expanding our production capabilities for our NanoNet filtration media. These investments will continue to improve our operational excellence and operating costs. Our fourth pillar is to expand into industrial filtration [Technical Issues]. We intend to pursue this growth inorganically through a disciplined programmatic approach. Our capital allocation priorities will continue to reflect our focus to growth, both organically and inorganically. In closing, I want to take the opportunity to provide you with an update on Cummins announcement to launch the share exchange. As expected, Cummins has announced they will commence an exchange offer to fully split off their remaining interest in Atmus.
We have filed a registration statement on Form S-4 with the Securities and Exchange Commission today in connection with the Cummins announcement. Pursuant to the exchange offer, Cummins shareholders will have the opportunity to exchange their shares of Cummins common stock with shares of Atmus. Upon successful completion, Cummins will no longer be the controlling shareholder of Atmus. The completion of the exchange offer will be a significant milestone for Atmus, allowing us to unlock our full potential and accelerate the delivery of our growth strategy.
I am proud of our Atmus team who've worked hard to deliver these results. As I reflect on 2023, we made significant progress and this fuels my belief in what is possible for Atmus as a fully independent company. I am even more excited for the opportunities we have in front of us in 2024.
Now, I will turn the call over to Jack, who will discuss our financial results in more detail.