James C. Fish
President and Chief Executive Officer at Waste Management
All right. Thanks, Ed. Good morning, everyone, and thank you for joining us today. I'm pleased to report another year of outsized operational and financial performance, driven by our team's focus on-top line growth and cost discipline. This combination, along with our ongoing investments in technology, automation and sustainability have positioned WM to continue delivering long-term value to our shareholders. In 2024, we remain dedicated to optimizing the cost structure, expanding our sustainability platform and enhancing shareholder returns. This focus led us to achieve operating EBITDA growth of more than 10% in our legacy business for the year and achieving 30% full-year operating EBITDA margin for the first time in our history.
Our collection and disposal business led the way driven by consistent organic revenue growth, disciplined cost initiatives and a continued focus on business mix optimization. 2024 marked a year of significant milestones in progressing sustainability growth investments. We brought five renewable natural gas facilities online, expanding our renewable energy platform and further positioning WM as a leader in environmental sustainability. And we're confident in the demand for renewable natural gas, especially from sources like our landfills and in our overall investment thesis for these transformative assets.
Additionally, in 2024, we advanced automation upgrades at 10 recycling facilities, improving throughput and lowering operating costs across our recycling network and added recycling facilities in two new markets. These investments are unlocking opportunities with customers and delivering positive environmental outcomes, while also putting us on a path to broader long-term financial growth. We're progressing well on the remaining renewable natural gas and recycling projects and expect our growth investments to contribute operating EBITDA approaching $800 million in 2027.
We have a great deal of confidence in the value of these projects that are underway, and we're enthusiastic about the strong complement they provide to our existing business. In addition to achieving strong organic growth across our business in 2024, it was a sizable year for acquisitions, including the successful completion of the Stericycle acquisition in November.
Adding Stericycle's leading platform in medical waste management and secure information destruction to WM broadens our suite of solutions, allowing us to more comprehensively serve our customers across a wider range of environmental services. Our integration efforts are underway, and in a short three months, we've integrated the commercial, operations support and back-office functions into WM Structures led by our seasoned disciplined leaders.
One of our new employees summed up our excitement for this acquisition, saying, it really feels good to be working for a management team that's looking to grow and optimize the business. We have a well-resourced experienced WM team engaged in making the necessary operational and cultural changes, and we're encouraged by the progress we've made so-far. With respect to synergy capture, we now expect $250 million of synergies over a three-year period and we're confident we can deliver up to $100 million in 2025.
The WM Healthcare Solutions business is expected to grow about 9% before synergies, driven by organic revenue growth and operations initiatives. Overall, we remain confident and focused on ensuring a smooth transition for both employees and customers while driving synergies and unlocking value. This acquisition exemplifies our disciplined approach to capital allocation and strategic growth, and we're excited about the long-term benefits it will bring to WM.
Looking ahead to 2025, we're confident that the momentum we've built will lead to another year of outpaced growth. At the midpoint of our guidance, we expect our collection and disposal business to produce more than 7% operating EBITDA growth in the year ahead, even as we face a headwind from the expiration of alternative-fuel tax credits. Our disciplined focus on pricing and cost management will ensure that we maintain healthy margins with a positive price to cost spread.
Our renewable energy and recycling platforms will continue to scale with additional projects coming online and incremental contributions from sustainability investments expected to accelerate this year, adding $150 million of operating EBITDA growth in our sustainability segments. Combining all of this, we expect to deliver total company -- company operating EBITDA growth of 15% at the midpoint of our range or nearly $1 billion of growth in 2025 compared to 2024.
Before I turn the call over to John to cover operating results, I want to express my gratitude to the entire WM team, including our new team members from Stericycle. Their commitment to our mission and values continues to be the foundation of our success. As we look-forward, we're excited about the opportunities ahead and remain steadfast in our goal of creating long-term value for all of our stakeholders. I'll now hand it over to John to provide more detail on our operational performance.