Sal Mancuso
Executive Vice President and Chief Financial Officer at Altria Group
Thanks, Billy. I'd like to begin with a discussion on the inflationary environment, which was exacerbated by the Russian invasion of Ukraine. We continue to monitor the potential impacts to our operations and supply chain, and we are actively working to mitigate risk. Thanks to the hard work of our teams, we have not experienced a material adverse impact from these events. While our company will continue to monitor the situation, our hearts go out to the suffering Ukrainian people and to all of those affected by the war. Moving to our businesses. The smokeable products segment delivered excellent financial performance once again. In the first quarter, the segment grew its adjusted OCI by 5.7% and expanded its adjusted OCI margins to 59.5%. The segment also reported strong net price realization of 9.2%. First quarter smokeable segment reported domestic cigarette volumes declined 6.3%. When adjusted for trade inventory movements and other factors, we estimate that segment domestic cigarette volumes for the first quarter declined by 8% and that industry volumes declined by 6.5% over the same period. We believe it's important to analyze cigarette volume trends over the longer term as decline rates in any one period can be influenced by various factors. In fact, the two-year average decline rates for first quarter adjusted smokeable segment and industry cigarette volume declines were 5.5% and 4.5%, respectively.
In the marketplace, Marlboro demonstrated strength and resilience during a dynamic period for consumers. In the first quarter, Marlboro's retail share of the category was 42.6%, stable sequentially and down 0.4 versus the year ago period. Marlboro also maintained its leadership among premium brands, growing its share of the premium segment to 57.8%, up 0.2 sequentially and versus year ago. And in discount, total share of the cigarette category in the first quarter increased 0.3 sequentially to 26.4% driven primarily by deep-discount products. We believe the share increases in discount were due to the previously mentioned macroeconomic factors that affected tobacco consumers in the first quarter. In cigars, Middleton continued to provide strong contributions to smokeable segment financial results, and we are encouraged by the continued strength of the iconic Black & Mild brand. Reported cigar shipment volume decreased 9.6% in the first quarter, primarily driven by trade inventory movements. To date, Middleton is successfully navigating the regulatory environment with the support of our regulatory affairs team, having received market orders or exemptions from the FDA covering over 99% of its volume. Of course, as Billy mentioned earlier, we will continue to monitor the FDA's proposed product standard on characterizing flavors in cigars and its potential impact to Middleton's portfolio. We expect to be actively engaged in providing our perspective throughout the rule-making process. Moving to the oral tobacco products segment, adjusted OCI and adjusted OCI margins contracted in the first quarter primarily due to the increased investments behind on! Total segment reported shipment volume decreased 1.9%.
When adjusted for trade inventory movements and calendar differences, we estimate that total oral tobacco segment volumes were unchanged. At the industry level, total oral tobacco volume growth moderated to 1.5% over the past six months. We continue to observe steady growth from the oral nicotine pouch category, but this has been offset by declining moist smokeless tobacco volumes as a result of difficult comparison periods and the macroeconomic challenges facing tobacco consumers. Retail share for the oral tobacco products segment declined 1.1 percentage points in the first quarter as declines in MST offset strong share gains for on!. We remain pleased with the overall performance of the segment as Copenhagen continues to generate significant income in the high-margin MST category, and we remain excited about the performance of on! Turning to our investment in ABI, we recorded $141 million of adjusted equity earnings in the first quarter, down 25.8% versus the prior year. As we have previously shared, we view our ABI stake as a financial investment, and our goal is to maximize the long-term value of the investment for our shareholders. Moving to capital allocation and our financial outlook. We remain committed to creating long-term shareholder value through the pursuit of our vision and our significant capital returns. In the first quarter, we paid approximately $1.6 billion in dividends and repurchased approximately 11.3 million shares totaling $576 million. We have approximately $1.2 billion remaining under the currently authorized $3.5 billion share repurchase program, which we expect to complete by year-end.
We reaffirm our guidance to deliver 2022 full year adjusted diluted EPS in a range of $4.79 to $4.93. This range represents an adjusted diluted EPS growth rate of 4% to 7% from a $4.61 base in 2021. We continue to expect that 2022 adjusted diluted EPS growth will be weighted toward the second half of the year. Before opening it up to Q&A, I'd like to comment on our recent ESG progress. Whilst harm reduction and underage use remain the most important social issues for our company to address, we have committed to make advancements in other ESG areas. At Altria, we are committed to reducing our environmental impact and recently announced our first virtual power purchase agreement for energy produced by a new wind farm project in Texas. This agreement marks significant progress toward two of our science-based environmental targets: Achieving 100% renewable electricity and reducing operational greenhouse gas emissions 55% by 2030. When the project is operational, we expect we will hit both those targets ahead of schedule. We're proud to support a project that will bring additional renewable energy to the electricity grid, contributing to positive climate action. With that, we'll wrap up, and Billy and I will be happy to take your questions. While the calls are being compiled, I'll remind you that today's earnings release and our non-GAAP reconciliations are available on altria.com. We've also posted our usual quarterly metrics, which include pricing, inventory and other items.
Let's open the question-and-answer period. Operator, do we have any questions?