Corning Painter
Analyst · Josh Spector with UBS
Thank you, Wendy. Good morning, everyone, and thank you for joining our call today. We started 2024 on a strong footing with adjusted EBITDA of $85 million, our second best Q1 behind only last year's results. More importantly, we saw underlying improvement in the business. Our specialty volume grew 19% compared with last year. At the same time, we increased our gross profit per ton from $492 in Q4 to $659 to a level more in line with normal margin levels. Rubber gross profit margins of $435 per ton were well above last year's average of $409 per ton.
Prior to 2022, our rubber gross profit margins typically ran in the $200 to $300 per ton range. These results clearly show that our key markets continue to restructure, and this is the new normal from which we can build. As a result of our progress in both markets, we continue to expect 2024 to be another year of growth leading to record EBITDA.
In summary, we're on track to outperform expectations in specialty and to exceed per ton margins in Rubber, despite a more challenging geographic mix in both markets. Digging deeper into Rubber, we expect strong demand in Europe, a weaker-than-expected demand in the Americas. We are confident that we can adapt to these changes with agility and remain committed to our guidance range of adjusted EBITDA at $340 million to $360 million, and adjusted diluted EPS of $2.05 to $2.20 per share, up 5% and 11%, respectively.
In sustainability, we were recently notified that our EcoVadis rating has been raised from gold to platinum, the highest possible distinction. That means we earned a place amongst the top 1% of companies [accessed] by EcoVadis, one of the world's largest providers of business sustainability ratings. This ranking is quite prestigious with a well-respected NGO validating our tremendous progress. A huge congratulations to the whole Orion team on this accomplishment, thank you and well done.
Looking at our two business units and starting with Rubber, our customers are gaining confidence looking towards 2025. This, combined with the EU ban on Russian Carbon Black, which begins in less than 2 months, shipping challenges from Asia to Europe, the seeming end of the U.S. trucking recession and the industry restructuring in our value chain, all makes for a very promising 2025 pricing cycle. We see customers already gearing up for the negotiations, perhaps preferring to wrap things out before the market strengthens further. Some are essentially kicking off the negotiations now, while others are in the framing stage, defining parameters for the 2025 negotiation.
In terms of framing for our part, we are open to starting early, but we want to avoid holding volume for a customer and then being left at the alter at the last month. So we will be stricter in enforcing time-bounded offers, utilizing volume rebates and consider shifting production towards our specialty business to support the strengthening polymer market.
In our Specialty business, we advanced two significant products in Q1. First, last quarter, we shared that we achieved technical milestones related to the ongoing debottlenecking of our high-performance, and unique surface-treated gas black grades for the coatings and ink markets. I am happy to report that technical marketing and customer uptake of the additional capacity is going well, exceeding expectations. Second, last month, we also announced the introduction of [indiscernible], a new conductive carbon aimed at batteries with more of a cost-based value proposition. Here, I'm happy to say this product has been qualified by a leading player in the lithium-ion battery space and commercial sales have [ picked up ].
Turning to Slide 4. With the EPA spending behind us, we will now focus our capital allocation on more financial and shareholder rewarding ways. I see capital allocation as management's top responsibility after safety. One priority for us is strategic and profitable growth. Here, we recently celebrated the groundbreaking of our new plant in La Porte, Texas, that is scheduled to be online in mid-2025. When completed, this will be the only facility in North America, producing high-purity settling-based conductive additives to support the global shift to electrification.
This site will produce conductive additives with about 1/10 the carbon footprint compared with alternative conductive carbon technology. As we've communicated in the past, this not only supports formulations for lithium-ion batteries, but is also an essential material in the high-voltage cables that are needed to build out electric grids around the world. With that, I would ask Jeff to provide additional insights into our financial results.