Ronald Mittelstaedt
Analyst · Raymond James
Okay. Thank you, Mary Anne. As noted earlier, we're off to a great start in 2024 by any number of measures, beginning with our financial results. Already set up for industry-leading outsized margin expansion during the year, we delivered a top to bottom beat in the quarter with adjusted EBITDA margin 20 basis points above our outlook and momentum for continued outperformance from a number of drivers, and this was all achieved in spite of significant weather impacts in January and early March.
Along with better-than-expected financial results, we saw continued improvement in trends for employee retention and most importantly, safety. In Q1, voluntary turnover once again stepped down sequentially, making the sixth consecutive quarter of improvement to levels, which are now 30% below the peaks we saw in late '22.
Similarly, we saw continued improvement in safety, with incidence rates declining for the seventh consecutive month. In fact, during Q1, we achieved some of our best safety performance in years, with monthly incidents down to 3-year lows, in spite of outsized growth from acquisitions during that period. We believe these results reflect our commitment to a culture of accountability with an empowered and engaged employees.
To that end, we're excited about the steps we've taken to support employee growth and development with expanded training, including through our in-house driver academies, the second of which will open this summer, and our diesel technician school partnership offering. We expect that these internal efforts will augment the improving dynamics we've seen in employee recruiting, resulting from additional resources and targeted efforts.
As noted previously, the progress in retention and safety we're seeing today positions us to unlock future benefits from improving costs and risk management, along with continued and expected growing savings across several areas, including labor, maintenance and third-party services, all of which we are seeing in the financials today.
Moving back to our financial results, starting with organic solid waste growth. In the first quarter, we delivered solid waste core pricing of 7.8%. And to be clear, our core price is what we actually retained, not what was implemented, which in other models get reduced by churn to calculate yield. Our price retention was in line with our expectations and continues to reflect the resilience of our market model.
Similarly, reported volume growth of negative 3.8% was in line with our expectations following extreme weather events, primarily during January, which we believe impacted reported volumes by about 100 basis points beyond what we would consider typical levels of ongoing purposeful shedding.
Looking ahead to Q2, we would expect a sequential step-up in reported volumes of about 100 basis points, assuming a typical seasonal ramp on activity. And as a reminder on volume calculations, our reported volumes are strictly solid waste volume changes, not RNG, E&P, recycled commodities or acquisitions until after we've owned them for 12 months. Companies calculate volumes differently, and they may view them differently.
As discussed in previous quarters, our outsized growth over the past few years has created the opportunity for improving revenue quality and otherwise rightsizing newly acquired locations. Depending on the market, purposeful shedding and contract nonrenewals may provide multiyear tailwinds for margin expansion, along with improvements in asset utilization and operating efficiencies. We look forward to similar opportunities from acquisitions that fit our strategy and meet our financial criteria as we maintain our focus on long-term value creation. We continue to see high levels of seller interest and have a robust pipeline of solid waste opportunities across our regional footprint.
As noted, acquisition activity has already contributed to our strong start to the year with approximately $375 million in annualized revenue completed to date. In addition to the secure energy divestitures we acquired in February, we've completed acquisitions of over $150 million in annualized solid waste revenue, including a new market entry providing services to customers in Indiana and Southern Michigan.
The strength of our financial position and free cash flow generation provide flexibility for continued acquisition outlays in 2024 for what could be one of our busiest years ever, along with continuing to increase our capital to shareholders.
Beyond M&A, we continue to make progress on our development of multiple renewable gas, or RNG facilities, 3 of which are scheduled to be operational this year. In spite of industry-wide delays related to equipment and utility installations, we continue to anticipate an incremental $200 million of annual EBITDA beginning in 2026 from the projects in development on a commensurate capital outlay. As noted previously, $150 million of that CapEx will be deployed in 2024 and has been factored into our full year free cash flow outlook.
Now I'd like to pass the call to Mary Anne to review more in depth the financial highlights of the first quarter and provide a detailed outlook for Q2. I will then wrap up before heading into Q&A.