DuPont reported first quarter 2026 results that exceeded previously communicated guidance, delivering net sales of $1.7 billion (up 4%) on 2% organic growth, with operating EBITDA of $414 million up 15% year-over-year and adjusted EPS of $0.55. Management raised full year 2026 guidance, citing the strong start and price increases tied to the Middle East conflict, and announced an expected $275 million accelerated share repurchase. Strength in healthcare and aerospace was partially offset by construction softness and Middle East logistics disruptions that primarily impacted the water business. The company completed the divestiture of the Aramids business on April 1st, generating about $1.2 billion of gross proceeds.
Good morning and thank you for joining us for DuPont's first quarter 2026 financial results conference call. Joining me today are Lori Koch, Chief Executive Officer, and Antonella Franzen, Chief Financial Officer. We have prepared slides to supplement our remarks, which are posted on DuPont's website under the investor relations tab and through the webcast link. Please read the forward-looking statement disclaimer contained in the slides. During this call, we will make forward-looking statements regarding our expectations or predictions about the future. Because these statements are based on current assumptions and factors that involve risks and uncertainties, our actual performance and results may differ materially from our forward-looking statements. Our Form 10-K, as updated by our current and periodic reports, includes detailed discussions of principal risks and uncertainties which may cause such differences.
Unless otherwise specified, all historical financial measures presented today are on a continuing operations basis and exclude significant items. We will also refer to other non-GAAP measures. A reconciliation to the most directly comparable GAAP financial measure is included in our press release and presentation materials and has been posted to DuPont's investor relations website. I'll now turn the call over to Lori, who will begin on slide three.
Good morning and thanks everyone for joining our call. Earlier today, we reported our first quarter financial results, which exceeded our previously communicated guidance. Through disciplined commercial and operational execution, we delivered organic sales growth of 2%, 130 basis points of pro forma margin expansion, and double-digit adjusted EPS growth. Free cash flow generation and conversion were solid in the quarter. As a result of our first quarter performance, along with price increases due to the Middle East conflict, we are raising our full year 2026 financial guidance. Antonella will provide further details shortly. We also announced that we expect to launch a $275 million accelerated share repurchase under our existing program, a clear example of how we continue to advance our strategic priority of driving disciplined capital allocation by returning cash to shareholders.
On the next slide, I will cover the progress we are making on driving growth and continuous improvement. We completed the previously announced divestiture of the Aramids business on April 1st. We are confident in Arclin's ability to continue to drive growth and opportunity for the employees and customers of the combined businesses. We also recently issued our 2026 Sustainability Report and announced our new 2035 sustainability goals. The progress we made in 2025 highlights the power of our innovation engine, creating sustainably advanced solutions that help our customers succeed. We continue to reduce our environmental footprint and increase the use of renewable energy sources across our operations while maintaining a strong focus on execution and discipline.
Safety and culture continue to differentiate DuPont with record safety performance and high employee engagement, reinforcing the connection between what we do every day and the value we create for our customers. Our 2035 goals reinforce our commitment to delivering value by embedding sustainability directly into our business strategy. These goals focus on three impact areas: sustainable innovation, resilient operations, and people, partners, and communities. They are designed to drive growth through innovation, operational excellence, and accountability across our value chain, while also advancing progress in areas such as climate action, circularity, safety, and responsible sourcing. Moving to slide four. We continue to advance our strategic priorities and are seeing direct impacts from the implementation of our business system. We've strengthened our performance-based culture with a clear emphasis on growth and continuous improvement, reinforced by the launch of our refreshed core values.
This is enabling greater consistency across the businesses as we drive excellence in innovation, commercial execution, and operations. Starting with innovation, it remains at the core of our value proposition. Our 2025 vitality index was 35%, above the benchmark we previously outlined, reflecting the strength and relevance of our product portfolio. During the quarter, we delivered a steady cadence of new product introductions and customer wins across healthcare, water, and diversified industrial end markets. Recent launches include upgraded FilmTec nanofiltration elements designed to help municipalities and drinking water utilities produce high-quality water with lower energy consumption and reduced operating costs. These innovations are being enabled not only by strong R&D execution, but also by continuing investments in digital and AI capabilities.
Last week, we announced that we are collaborating with Uncountable, an AI-driven platform for end-to-end product and application development, focused on accelerating development, improving cycle time, and sharpening how we translate ideas into differentiated solutions for customers. This collaboration streamlines and accelerates the work we have been doing on connected lab infrastructure and digital innovation. From a commercial standpoint, we are making steady progress in demand generation and pipeline discipline. Across the businesses, we are advancing targeted sales plays that bring together our technologies and application expertise to address specific end markets where we see attractive growth and differentiated value. We continue to standardize how opportunities are identified, reviewed, and advanced, supported by a clear cadence, better data quality, and stronger collaboration between commercial, technical, and operations teams.
These efforts are driving better visibility, improved conversion, and stronger alignment between our commercial team and customers' highest value needs, improving the quality and durability of our pipeline. On operational excellence, our teams remain intensely focused on the fundamentals: safety, quality, delivery, inventory, and productivity. During the quarter, we delivered meaningful improvements in asset reliability and equipment effectiveness across our key facilities, which supported better on-time delivery and stronger operational throughput. At the same time, we continue to drive productivity through focused maintenance and reliability initiatives, lean execution, and Kaizen activity across our sites. I am personally excited as we recently kicked off our annual CEO Kaizen event, in which myself and the executive leadership team will each participate in events focused on strengthening our value creation processes across the company. We are also advancing how we operate by pairing process discipline with digital and AI capabilities.
Over the last several quarters, we have expanded the use of data-enabled tools to improve maintenance, planning, accelerate defect detection, and optimize asset performance. These capabilities are allowing our teams to convert operational data into actionable insights faster, improving reliability, reducing variability, and reinforcing safe operations, all while delivering cost and productivity benefits. Importantly, this operational rigor positions us well as we navigate a dynamic external environment. While we are mindful of potential macro and geopolitical headwinds, our focus on productivity, automation, and structural improvement is creating resilience in the businesses. We are building a strong pipeline of Kaizen events and improvement projects for the balance of the year aimed at sustaining momentum in growth and productivity. Our first quarter results demonstrate that we are off to a great start.
Our April sales were in line with our expectations, and we continue to see strong order growth trends across the majority of our businesses. Our teams continue to focus on driving growth and operational discipline, and our strategic priorities position us well for long-term value creation. With that, I'll now turn the call over to Antonella to cover the financials and outlook in more detail.
Thanks, Lori and good morning, everyone. The first quarter marked a strong operational start to the year, with results exceeding our financial guidance. Favorable topline mix and effective productivity actions drove strong operating EBITDA performance and meaningful margin expansion in the quarter. Throughout today's call, I will provide comments on our results against our prior year reported financials as well as on a pro forma basis, which adjusts for our post-separation corporate costs, interest expense, and income tax rate. This is consistent with the methodology and financial metrics that we provided at our 2025 Investor Day. Beginning with our first quarter financial highlights on slide five. Net sales of $1.7 billion were up 4% versus the year-ago period on 2% organic sales growth and a 2% benefit from currency.
Organic sales growth was led by strength in healthcare and aerospace, partially offset by continued softness in construction markets and logistics disruptions due to the conflict in the Middle East. These disruptions primarily impacted sales in our water business in the quarter. From a segment view, during the quarter, organic sales grew 3% in Healthcare & Water Technologies, with organic sales growth about flat in Diversified Industrials. First quarter operating EBITDA of $414 million increased 15% versus the year-ago period on organic sales growth, favorable mix, and productivity. This resulted in operating EBITDA margin of 24.6% in the quarter, an increase of 230 basis points year-over-year. On a pro forma basis, operating EBITDA increased 10%, with margins expanding 130 basis points year-over-year.
Turning to cash flow, we delivered transaction adjusted free cash flow of $147 million and related conversion of 65%, a solid start to the year. Turning to slide six. On a reported basis, adjusted EPS for the quarter of $0.55 increased 53% year-over-year. On a pro forma basis, adjusted EPS for the quarter was up 20% versus the year-ago period. The increase was primarily driven by higher segment earnings of $0.06, with an additional $0.03 benefit coming from a lower tax rate, share count, and exchange gains and losses. Turning to slide seven. Healthcare & Water Technologies first quarter net sales of $806 million were up 6% versus the year-ago period on 3% organic growth and a 3% benefit from currency.
For the first quarter, healthcare sales were up high single digits percent on an organic basis versus the year-ago period. Organic growth was broad-based, led by continued strength in medical packaging and biopharma. Water sales were down low to mid-single digits percent on an organic basis as strength in industrial water and microelectronics markets were more than offset by logistics disruptions in the Middle East. Operating EBITDA for the segment during the quarter of $244 million was up 9% versus the year-ago period on organic growth, favorable mix, and productivity gains. This resulted in operating EBITDA margin of 30.3% in the quarter, an increase of 110 basis points year-over-year. Turning to Diversified Industrials on slide eight.
First quarter net sales of $875 million increased 3% versus the year-ago period on a 3% benefit from currency. Organic sales growth was about flat in the quarter. At the line of business level, organic sales for building technologies were down low single digits percent on continued weakness in construction markets. Industrial technologies organic sales were up low single digits percent as continued strength in aerospace and growth in automotive were partially offset by declines in the printing and packaging businesses. Operating EBITDA for Diversified Industrials of $200 million was up 8% versus the year-ago period on favorable mix and productivity. Operating EBITDA margin during the quarter was 22.9%, expanding 110 basis points versus the year-ago period. Turning to slide nine.
We are raising our full year 2026 financial guidance given our strong start to the year, as well as now including the interest income benefit from the Aramids transaction. For the second quarter, we estimate net sales of about $1.8 billion, operating EBITDA of about $430 million, and adjusted EPS of $0.59 per share. Our second quarter net sales guidance assumes about 3% organic growth year-over-year. Currency is expected to be a slight tailwind in the quarter. For the Healthcare & Water segment, we expect second quarter organic sales growth in the mid-single digits percent range, led by strength in medical device, biopharma, and industrial water markets.
For the Diversified Industrials segment, we expect second quarter organic sales growth in the low single digits percent range on continued strength in aerospace and growth in printing and packaging, partially offset by continued softness in construction markets. For the first half, our estimated net sales of about $3.5 billion assumes growth of about 4% year-over-year. This translates into operating EBITDA of about $844 million, a year-over-year increase of about 8% on a reported basis and 7% on a pro forma basis, resulting in strong operating leverage at an incremental margin greater than 40%. Our first half net sales and operating EBITDA guidance both represent approximately 48% of our total expected full year results at the midpoint. This is in line with our historical sales and earnings cadence.
For the full year 2026, at the midpoint, we now expect net sales of about $7.185 billion, a net increase of $80 million versus our prior guide. Our full year net sales guidance now assumes about 4% organic growth, including about 1% from pricing actions taken to fully offset higher input costs due to the Middle East conflict. A stronger U.S. dollar has also reduced our expected full year currency benefit to less than 1%. Operating EBITDA at the midpoint is now expected to be about $1.745 billion, primarily reflecting our stronger first quarter results, partially offset by currency headwinds. Our adjusted EPS range is now expected to be $2.35-$2.40 per share, a $0.10 increase versus our prior guidance.
Our EPS guidance now includes benefits from higher interest income due to the Aramids transaction, as well as a lower tax rate, which we now expect to be in the 24%-25% range. At the midpoint, our adjusted EPS is about a 40% increase on a reported basis and a 15% increase on a pro forma basis. With that, we are pleased to take your questions, and let me turn it back to the operator to open the Q&A.