Thanks, Elise. Good afternoon, everyone. Thank you all for joining us. Also on the call with me today are Julie Whalen, our Chief Financial Officer; Felix Carbullido, our Chief Marketing Officer; and Yasir Anwar, Chief Technology Officer.
On today's call, I want to talk to you about our outstanding third quarter results and more importantly, our company's distinctive positioning and long-term growth prospects.
In the third quarter, sales, again, outperformed expectations with demand comp up nearly 31% compared to a net comp of 24%, driven by strength across all of our brands. E-commerce accelerated sequentially to a record net comp of over 49%, and we were pleased to see our store performance improved throughout the quarter to a net negative 11% comp. Even more encouraging is the retail demand comp at negative 4%. And we delivered these sales more profitably with operating margins reaching record levels, expanding to 15.7% versus last year's 7.6%.
All of our brands outperformed. Pottery Barn delivered a net comp of 24.1%, driven by double-digit comps in all divisions. Growth initiatives, including PB Apartment and Marketplace, continue to build a momentum, growing more than 100% again this quarter to reach nearly $200 million in sales year-to-date.
Our Pottery Barn Kids and Teen business grew at a net comp of 23.8% with accelerated growth in all areas. We also saw a longer tail in our back-to-school business, with our Gear and study-at-home solutions delivering a strong finish to the season. The Williams-Sonoma brand delivered another record quarter with a net comp of 30.4%. This is a business that has always had a smaller online percentage compared to our other brands, and this represents a big opportunity.
Our initiatives in e-commerce and our real estate optimization strategies are driving our channel mix shift. We're also pleased to see our stores performing better than expected in the Williams-Sonoma brand.
And finally, in our West Elm brand, we saw a significant pickup in net comp in Q3 to 21.8%, driven by strong growth in all major categories as well as the traditional retail-dominant categories of textiles and decorative accessories.
As we enter the fourth quarter, holiday is off to a strong start across all of our brands. We are seeing earlier sales in holiday products than in years prior, and our teams are prepared and ready to meet this demand by moving up launch dates and marketing for our holiday merchandise. And we continue to see DTC's strength in retail improving despite reductions in store occupancy.
Our supply chain team is also working diligently to meet this elevated demand. Despite industry-wide capacity and shipping constraints due to COVID-19, our teams are leveraging our scale and unique business model to do everything we can to ensure the best customer experience this holiday. Our global sourcing team has been partnering with our vendors to expand capacity, leveraging our in-country presence and long-standing vendor relationships. Our transportation team worked quickly and aggressively early this year to further diversify our carrier network, and we believe we have successfully secured parcel shipping capacity for the elevated volumes we expect to drive this holiday.
We will also be maximizing our omni-channel capabilities such as ship from store and buy online, pick up in store to supplement our supply chain fulfillment capacity. We expect our omni services to fulfill up to 20% of our expected total DTC volume this holiday. These results demonstrate our company's ability to deliver long-term profitable growth post-pandemic.
Our company's mission is to enhance the quality of people's lives at home. We have built our business with this mission at the forefront, investing in areas that matter most to our customers. These include high-quality, well-designed, sustainable products at a great value because of our scale and vertical supply chain; inspiring marketing; and the convenience of our high-touch digital-first omnichannel experience. And this, combined with our loved brands that serve a wide range of customers across aesthetics and price points, is our distinctive positioning and is our competitive advantage. No one else in the market is doing what we are doing. Our mission also extends to how we take care of our employees, our vendor partners, our customers and our shareholders.
At Williams-Sonoma, Inc., and across our brands, we are good by design from managing resources responsibly, caring for our people and leading with our value. In a year marked by social, environmental and health crises on a scale not previously seen in our lifetime, these values are more important than ever. And we are proud to be leaders in our industry through our financial performance, our impactful ESG programs and how we have taken care of our people, while increasing returns to our shareholders. As we look at our business today, there are 3 key accomplishments that we believe will deliver significant growth for the future.
First, we've been acquiring new customers in our digital channels at a rate of over 30% year-to-date, a significant acceleration compared to previous years. While we have seen this in the past, it generally foreshadow strong business in the future. This is particularly notable -- a particularly notable increase as stores have historically been the key driver of new customer growth. This overall increase, despite less store traffic, shows the effectiveness of our current digital marketing strategy in acquiring new customers.
Second, and even more encouraging, is that we are attracting these customers while deliberately shifting away from promotions towards marketing that has inspiring content and it's brand building. This should mean that we have higher retention of these customers post-pandemic.
And finally, all of our brands are resonating with younger generations. Over the last 3 years, this cohort has driven the majority of our new customer growth. And year-to-date, millennials represent nearly 50% of our sales from new customers. This, of course, has not been a coincidence as our value proposition and competitive strengths are highly appealing to younger generations who have a strong affinity for design, engaging content and accessible sustainably made products. In addition to these 3 internal positive indicators, industry trends also support our longer-term growth. These industry trends include the rapid shift to e-commerce, further industry consolidation, the generational shift to a younger customer, the importance of sustainability and consumer purchasing decisions and the increase in remote work and population mobility.
We believe that we are one of the few retailers best positioned to take market share in the years to come. Not only is our value proposition relevant and compelling, our multiyear growth strategies and investments are working. We will continue to prioritize e-commerce growth and push the natural shift in our channel mix. We will also expand into product whitespace and aggressively support the growth of new businesses and opportunities within our brands and cross-brand.
For example, our business-to-business opportunity. We believe that Williams-Sonoma, Inc. business-to-business will be our next $1 billion business within the next 5 years. The B2B market is large and highly fragmented with a market size of $80 billion in the U.S. alone. Our competitive advantage is that we have 8 unique brands, in-house product development capabilities and a sustainable supply chain, which allows us to simplify the customer experience for our B2B customers. Since the launch of this business in 2019, we have gained traction in all areas with average order size and repeat purchases both growing double digits, and major project wins in residential, commercial, education, health care and hospitality verticals.
Our number of contract accounts are up 50% versus last year. We are aggressively pursuing this growth opportunity and are on track to drive over $300 million in sales this year, which represents strong double-digit growth compared to last year.
Another key growth driver that we believe is underappreciated is our global opportunity. Our expansion to date has proven that we can grow profitably and with low capital investment, further supporting the viability of profitable growth in this business for us, and the estimated $450 billion global home furnishings market.
To reiterate, our strategy for expansion is through a franchise model, and we look forward to growing our presence in our current markets, and our launch in India next year.
In summary, our vision is to own the home. And with our distinctive positioning, we will only become more relevant. We have brands that serve a wide range of customers across aesthetics and price points. And unlike our competitors with undifferentiated marketplace models, we have always been different. We designed the vast majority of our products. And for those that we carry from third-party vendors, we ensure that they are high-quality, sustainable and the best value in the market. We offer service that is high-touch, both in-person and virtually because of our impactful stores and associates and our sophisticated e-commerce platform. And most importantly, the shift to e-commerce favors our business and provides a long runway to gain market share.
We have the strategies, the team and the world-class platform to successfully execute on our growth opportunities. And we are confident that we will continue to drive accelerating sales growth with increasing profitability and evolve into an even more attractive business for our stakeholders during and post-pandemic.
Before I turn the call over to Julie, I want to thank our team. We have been operating in this challenging environment for more than 8 months now, and our team has been an unwavering source of energy, creativity and determination. We are deeply appreciative of their remarkable performance.
And with that, I'd like to pass the call over to Julie to discuss our financial results for Q3 and our outlook for Q4 and beyond.