Thanks Dave. And let me say how terrific it is to have Dave on board. My colleagues on the executive leadership team and I, look forward to working with him, as we continue to build on our strong results in 2022.
Now, turning to page 5, I'll walk through our fourth quarter highlights. We delivered strong financial results again this quarter, capping off the year with strong market share growth and margin expansion and in-turn significant earnings growth in a challenging macro environment.
Net sales for the fourth quarter grew 11%, compared to the same period in 2021. Year-over-year volume growth strengthened from Q3 to Q4, which we see as a positive for US Foods and our customers as their recovery continues.
Adjusted EBITDA grew 34% for the quarter representing an, acceleration from our Q3 growth rate despite essentially zero sequential inflation in the fourth quarter.
Our adjusted EBITDA margins also increased 70 basis points from the prior year, as we gained further operating leverage.
I cannot thank our associates enough, for their incredible work to drive progress against our long-range plan. A year ago we set out to deliver $1.3 billion in adjusted EBITDA in 2022 and we exceeded the high-end of our guidance, thanks to their dedication.
Turning to our customer experience, we continue to gain share in target customer types via our differentiation strategy and customer focus. We further leveraged our omnichannel capabilities for profitable growth by CHEF'STORE, Pronto and US Foods Direct in addition, to continuing to strengthen our core digital customer platform by expanding customer usage of MOXē.
We also made progress on our supply chain operations in the fourth quarter. The positive trends we saw in Q3 turnover continued in Q4, with driver turnover nearing pre-COVID levels and warehouse turnover showing sustained improvement.
We aren't yet where we want to be, but we are encouraged by the continued progress and strong evidence that the actions we are taking are yielding results.
As mentioned on our Q3 call we piloted flexible employee scheduling and seven-day delivery in one of our key markets. The results to-date have exceeded our expectations with significant reductions in turnover, positive employee feedback and improved safety results.
We are continuing the pilot at that location and are adding two additional locations in Q1.
Assuming we replicate these outcomes in these additional markets, we expect to significantly expand the flexible scheduling portion of this initiative in 2023.
As we have done in the past few quarters, we continue to strengthen our inbound logistics capabilities, resulting in further improved financial results and third-party partner collaboration. This work is well ahead of plan and a significant contributor to our strong results in 2022.
We continue to improve our capital structure and prudently allocate capital during the fourth quarter. Each of these actions reinforce our commitment to being responsible stewards of shareholder value, which Dirk will discuss in more detail shortly.
Turning to page six, we are pleased with the significant progress we have made against all three pillars of our long-range plan. Starting with our first pillar, profitable market share growth. We exceeded our volume goals relative to the market for the full year 2022.
In fact, we outperformed the market by nearly 150 basis points as our restaurant volumes, excluding our targeted exits, increased by approximately 1%, while the latest survey from our third-party provider showed a market decline of roughly 0.5%.
Specifically within restaurants, our independent case growth was 4.3%, while the third-party estimates that the market declined by 1.2%.
Our focus on growing with the right customers is yielding sizable benefits by allowing us to serve those customers more effectively and create longer-term relationships. This focus on our target customer types grows EBITDA dollars and expands our margins.
We opened six CHEF'STORES in 2022 and are working to increase the number of openings to at least eight in 2023, which means we will have a robust network of nearly 100 CHEF'STORES by the end of the year.
We are quite pleased with our market share gains in 2022 and expect further share gains in 2023 as we leverage our differentiated sales support strategy our industry-leading MOXē platform and our omnichannel options, as well as other sales growth initiatives.
Moving to the margin optimization pillar, we implemented a number of initiatives to improve gross profit per case regardless of market conditions. Those achieved excellent results in 2022.
Our three key focus areas are the same I talked about last quarter and have been significant contributors to our results on the year.
First, our team very effectively managed significant inflation earlier in the year and some commodity deflation later in the year through our established pricing and procurement processes.
We also optimized margins with a number of customers to better reflect the increasingly challenging cost environment facing our industry.
Second, we achieved our stretch goal of collaborating with vendors representing approximately 40% of our spend to improve our cost of goods and anticipate an additional 20% of spend to be addressed in 2023.
And third, our inbound logistics team focused intensively all year on working with vendors to ensure improved process and economics aligned with the market.
We also achieved $70 million of total synergies in 2022 related to our Food Group acquisition, which is above our previously stated $65 million target.
These initiatives along with a number of others together delivered the strong gross profit per case we saw in 2022 and we expect to build further on that performance in 2023.
We made progress on operational efficiencies despite a very challenging macro environment.
Our routing optimization resulted in significant miles reduction and drove cases per mile well above 2019 levels, despite case volume being lower than 2019.
Our work on retention and employee engagement also yielded benefits as we saw continued improvement in turnover and consequently productivity in the second half. We further improved productivity through a combination of network-wide initiatives and targeted optimization efforts in select markets with the greatest opportunities.
US Foods is advancing critical initiatives that drive our long-range plan and we'll execute against all three pillars with a goal of further enhancing the customer experience and our operational foundation as well as continuing to build on our progress into 2023 and beyond.
We've made significant progress throughout 2022. And while we are pleased with our progress, it's important to acknowledge that much opportunity remains here and we expect to build on our second half momentum in 2023.
Now, I'd like to hand it over to Dirk to go over our financial performance in more detail.