Thanks, Matt. This is a pivotal time for Stitch Fix, and we're fortunate to have someone with Matt's retail, digital and operational expertise leading us into the future. He's asking a lot of great questions and has a fresh perspective that's challenging our thinking in a really positive way.Let me begin with setting some context around FY '23. We made the decision to focus on the core fix experience, which meant changing our inventory, product and marketing strategies. To allow time for those strategies to take hold, we focused on near-term profitability and cash flow. This meant restructuring our organization, consolidating our warehouse footprint and making the decision to exit the U.K. market. Decisions like this are never easy, but we believe these actions were the right ones. Throughout the course of the year, we improved our inventory position, realized over $150 million of annualized cost savings and achieved our goal of returning to positive adjusted EBITDA and free cash flow.FY '23 net revenue was $1.64 billion, a decline of 21% year-over-year. We ended the year with approximately 3.3 million active clients, a decrease of 13% year-over-year. Despite the revenue decline, we believe we effectively unlocked the leverage potential for our business moving forward. We made great progress through cost savings and restructuring initiatives and ended the year with adjusted EBITDA of approximately $17 million, an improvement of more than $35 million versus the prior year.
We also generated nearly $39 million of free cash flow.For Q4, our performance was better than we expected and reflects the work we have done to improve gross margin and right-size our cost structure.
We also made progress on a number of key initiatives in the quarter. After a careful review of our operations in the U.K., we made the decision to wind down that business. We notified the affected employees in August, and we expect the full closure of our U.K. operations to be completed this calendar year.
Additionally, the plan to consolidate from 5 U.S. warehouse locations to 3 is on track to be completed this fiscal year. We believe the consolidation will have immediate cost savings and having inventory in fewer warehouses will make it easier for stylists to build more relevant assortments for clients, and we will realize inventory efficiencies as we scale.
We continue to expect the combined annualized cost savings related to the closure of the U.K. operation and the U.S. warehouse consolidation to be approximately $50 million.Q4 net revenue was $376 million, down 22% year-over-year, but above the high end of our prior guidance due to higher order volume. Revenue per active client declined 9% year-over-year in Q4 to $497 million. Q4 gross margin expanded 330 basis points year-over-year to 43.3%, thanks to the really hard work our merchandising teams did to improve the composition of our inventory over the last year. We ended Q4 with net inventory down 30% year-over-year and down 10% quarter-over-quarter to $137 million as we continue our efforts to align our inventory position with demand and increase the assortment composition of our successful private brands.Advertising was 7% of net revenue in Q4, down slightly over Q3 and down more than 350 basis points year-over-year as we right-sized our marketing spend based on specific payback methodologies. Q4 adjusted EBITDA was $10.4 million, above our range due to better-than-expected revenues and the gross margin and operating leverage I mentioned earlier. We generated $18 million of free cash flow in Q4 and ended the quarter with $258 million in cash, cash equivalents and investments and no bank debt.Turning to our outlook. We remain focused on improving the client experience, retaining and attracting clients, maximizing the effectiveness of our marketing, increasing leverage in our cost structure and driving positive free cash flow.
Before we get into the numbers, there are 2 key callouts in our guidance.
First, I want to remind everyone that FY '24 is a 53-week fiscal year.
We will also be providing this guidance in the context of U.S.-only operations as we anticipate reporting our U.K. results as discontinued operations beginning in Q1.
Our guidance provided in the press release details the reconciliation between FY '23 and FY '24 for both of these items.For the full year, we expect total U.S. revenue to be between $1.3 billion and $1.37 billion.
We expect total U.S. adjusted EBITDA to be between $5 million and $30 million, primarily reflecting an improved gross margin and ongoing cost savings initiatives. This guidance also assumes we will be free cash flow positive for the full year, though we may see some variability between quarters due to the timing of working capital requirements related to our inventory purchases.Moving on to Q1.
We expect total U.S. revenue to be between $355 million and $365 million, and we expect Q1 U.S. adjusted EBITDA will be between $2 million and $7 million.
We also expect revenues from the U.K., which we anticipate will be reported as discontinued operations in Q1 to contribute approximately an additional $7 million in Q1.
We expect both Q1 and full year gross margin to be approximately 43% to 44% as we continue to drive improvement in our inventory position with a higher mix of private brands and continued efficiencies in transportation costs.
We also expect advertising to be approximately 7% to 8% of revenue, but we'll continue to be opportunistic if we see the right return on our investment.We do expect inventory balances to rise in Q1 due to the timing of receipts ahead of Fall-Winter, but expect our inventory turns to improve as the year progresses. We began FY '24 with an eye to rebuilding, leveraging the cost savings work already accomplished in FY '23.
Our unit economics remain strong, and we will continue to identify opportunities to improve both fixed and variable costs in order to increase our contribution margin and fixed leverage potential.
We expect this continued focus on leverage and profitability, along with the acquisition and engagement of high lifetime value clients will help us maintain profitability today and provide a solid foundation for our future growth strategy.Now, let me turn the call back to Matt.