Dave Berwick3:18
Okay, hey, thanks Jim. Hello everyone. Before I review our business results, I'll start with the usual disclaimer. As we state in our earnings release, some of the information we discuss in the release and that may come up on this call reflects the company's or management's expectations or predictions of the future. Such predictions and the like are forward-looking statements. It's important to note that the company's actual results could differ materially from those projected in such forward-looking statements. Additional information concerning factors that could cause actual results to differ materially from those in the forward-looking statements is contained in the company's most recent 10-K. You should also be advised that the company does not undertake to publicly update forward-looking statements, whether as a result of new information, future events, or otherwise. Okay, now let me share a deeper look at our business performance.
Our depletions growth in the fourth quarter was a result of increases in our Truly Hard Seltzer and Twisted Tea brands, partly offset by decreases in our Samuel Adams, Angry Orchard, and Dogfish Head brands. The growth of the Truly brand, led by Truly Lemonade Hard Seltzer, continues to be very strong and well ahead of hard seltzer category growth. Truly Lemonade was the most incremental new product in the entire beer industry in measured off-premise channels in 2020. The Truly brand overall generated triple-digit volume growth in 2020 and grew its velocity and its market share sequentially. Despite other national, regional, and local hard seltzer brands entering the category in 2020, Truly increased its market share in measured off-premise channels from 22 points to 26 points and was the only national hard seltzer not introduced in 2020 to grow share. There remain many opportunities to expand packaged, channel, and geographic distribution, and we expect the Truly brand to continue to lead the growth of the business as it has come to stand for a great-tasting, refreshing, pure-play hard seltzer brand.
In early 2021, we launched Truly Iced Tea Hard Seltzer, and while still in the early stages, we're encouraged by the support our wholesalers are providing, the trial we're generating as a result of the brand's established equity, and the social media response from consumers. We'll continue to invest heavily in the broader Truly brand and work to improve our position in the hard seltzer category as competition continues to increase. Our Twisted Tea brand has benefited greatly from increased at-home consumption and continues to generate accelerating double-digit volume growth, even as new entrants have been introduced and competition has increased. Our Samuel Adams, Angry Orchard, and Dogfish Head brands have been most negatively impacted by COVID-19 and the related on-premise closures. For 2021, we plan to build upon our success and work to drive our brands to their full potential, with a particular focus on our Truly and Twisted Tea brands. We're expecting all of our brands to grow in 2021 and for the growth rate of our operating expenses to be below our top-line growth rate, delivering leverage to our operating income.
During the fourth quarter, as we increased our brand spend, we also made investments in our supply chain to ensure we're prepared for increased competitive activity in the hard seltzer category. We've invested to increase our can and automated variety pack capacity, but these capacity increases keep on getting eclipsed by our depletion growth, resulting in higher than expected usage of third-party breweries. We'll continue to take advantage of the fast-growing hard seltzer category and deliver against the increased demand through this combination of internal capacity increases and higher usage of third-party breweries. Although meeting these higher volumes through increased use of third-party breweries has a negative impact on our gross margins, we've begun a comprehensive program to transform our supply chain with a goal of making our integrated supply chain more efficient, reducing costs, increasing our flexibility to better react to mix changes, and allowing us to scale up more efficiently. We expect to complete this transformation over the next two to three years. While we anticipate the program to start delivering margin improvements in 2021, our gross margins and gross margin expectations will continue to be impacted negatively until the volume growth stabilizes. While we're in a very competitive business, we're optimistic for continued growth of our current brand portfolio and innovations, and we remain prepared to forsake short-term earnings as we invest to sustain long-term profitable growth in line with the opportunities that we see. Based on information in hand, year-to-date depletions reported to the company through the six weeks ended February 6, 2021, are estimated to increase approximately 53 percent from the comparable weeks in 2020. Now Frank will provide the financial details.