ThredUp Inc. (TDUP) Business

Item 1.    Business

ThredUp operates one of the world’s largest online resale platforms for apparel, shoes and accessories. Our mission is to inspire the world to think secondhand first. We believe in a sustainable fashion future and we are proud that our business model creates a positive impact to the benefit of our buyers, sellers, clients, employees, investors and the environment. Our custom-built operating platform consists of distributed processing infrastructure, proprietary software and systems and data science expertise. This platform is powering the rapidly emerging resale economy, one of the fastest growing sectors in retail, according to GlobalData's assessment of the secondhand market in January 2025.

ThredUp’s proprietary operating platform is the foundation for our managed marketplace, where we have bridged online and offline technology to make the buying and selling of tens of millions of unique items easy and fun. The marketplaces we have built enable buyers in the United States (“U.S.”) to browse and purchase resale items for primarily apparel, shoes and accessories across a wide range of price points. Buyers love shopping value, premium and luxury brands all in one place, at up to 90% off estimated retail price. Sellers enjoy ThredUp because we make it easy to clean out their closets and unlock value for themselves or for the charity of their choice while doing good for the planet. ThredUp’s sellers order a Clean Out Bag, fill and return it to us using our prepaid label. We take it from there and do the work to make those accepted items available for resale. In addition to our core marketplace, some of the world’s leading brands and retailers are already taking advantage of our Resale-as-a-Service (“RaaS”) offering, which allows them to conveniently offer a scalable closet clean out service and/or resale shop to their customers. We believe RaaS will accelerate the growth of this emerging category and supplements our overall supply strategy.

We have built a differentiated and defensible operating platform to enable resale at scale, combining:

•Distributed Processing Infrastructure. Our infrastructure is purpose-built for “single SKU” logistics, meaning that the vast majority of items processed are unique, came from or belong to an individual seller and is individually tracked using its own stock keeping unit (“SKU”). As of December 31, 2025, we operated distribution centers that could collectively hold more than7.5 million items. Our operations are highly scalable, and we have the ability to process more than 100,000 unique SKUs per day across our existing distribution center footprint. We drive continuous operational efficiency through proprietary technology and ongoing automation of our infrastructure. Our existing distribution centers are located in Arizona, Georgia, Pennsylvania, and Texas. By locating our facilities in strategic locations across the country, we can be closer to our buyers and sellers, which allows us to reduce shipping times in transit, and lower our inbound and outbound shipping costs. In addition, our facilities are located in geographic locations with access to a large, qualified talent pools.

•Proprietary Software and Systems. Our facilities run on a suite of our custom-built applications designed for “single SKU” operations. Our engineering team has implemented large-scale, innovative and patented automation for put-away, storage, picking and packing at scale. This automation results in reduced labor and fixed costs while increasing storage density and throughput capacity. Our proprietary software, systems and processes enable efficient quality assurance, item-attribution, sizing and photography.

•Data Science Expertise. We harness our robust, structured data set across our business to optimize economic decisions, such as pricing, seller payouts, item acceptance, merchandising and sell-through. We also leverage data to power efficient customer acquisition and lifetime engagement, and to provide a personalized shopping experience. ThredUp’s data science portfolio leverages machine learning algorithms, predictive analytics, and other artificial intelligence “AI” technologies to identify trends, anomalies and correlations, provide alerts and initiate business processes. ThredUp also offers AI-powered shopping tools, including improved search, where customers can use natural language prompts to obtain relevant and personalized results. Our AI-powered image search allows shoppers to upload photos to find matching or similar items, making it easy to recreate a desired look. We also offer Style Chat, an AI-powered chatbot, that helps customers create complete outfits based on natural language prompts that they provide.

We generate revenue primarily from items that are sold to buyers on our website and mobile app, as well as bag fees charged to sellers for processing Clean Out Bags. Our revenue is primarily derived from consignment sales, which are recognized net of seller payouts, discounts, incentives and returns. Cost of revenue primarily includes outbound shipping, outbound labor and packaging costs.

4

Table of Contents

On November 30, 2024, we divested 91.0% of the common stock of Remix US Holdings Inc., the parent company of Remix Global EAD (“Remix”), the operating subsidiary for our European business. As a result, we have discontinued our European operations. Unless otherwise noted as pertaining to “discontinued operations,” all commentary in this Annual Report on Form 10-K pertains solely to our continuing US operations. See “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Recent Business Developments” for more information.

Competition

Although we have built a scaled and highly differentiated platform and managed marketplace, we face intense competition. Our competitors include other apparel retailers, particularly retailers at an off-price or fast-fashion price point, vendors of new and secondhand items, including branded goods stores, local, national and global department stores, traditional brick-and-mortar consignment and thrift stores, specialty retailers, direct-to-consumer retailers, discount chains, independent retail stores, the online offerings of these traditional retail competitors, resale players focused on niche or single categories, as well as technology-enabled marketplaces that may offer the same or similar goods and services that we offer. Competitors offering the same or similar goods or services include:

•secondhand marketplaces, such as eBay, Goodwill, Mercari, Poshmark, The RealReal, Vinted and Vestiaire Collective;

•large online and discount retailers, such as Amazon.com, Inc., Target Corporation, and Walmart Inc.;

•off-price retailers, such as Burlington Stores, Inc., Ross Stores, Inc. and The TJX Companies, Inc.; and

•low-cost online fast-fashion retailers such as Shein and Temu.

Additionally, we experience competition for consumer discretionary spending from other product and experiential categories. See the section titled “Risk Factors—Risks Relating To Our Business and Industry—The market in which we participate is competitive and rapidly changing, and if we do not compete effectively with established companies as well as new market entrants or maintain and develop strategic relationships with third parties, our business, results of operations and financial condition could be harmed.”

We compete primarily on the basis of buyer and seller experience, product quality and assortment, breadth of brand offering, convenience and price. We believe that we are able to compete effectively because we offer buyers a vast selection of high-quality, secondhand and resale items at compelling prices with a fun and easy to use interface. For sellers, we offer an easy, convenient, reliable and fast way to recycle and monetize or donate their secondhand items.

Intellectual Property

We believe that our intellectual property rights are valuable and important to our business. We rely on a combination of patents, trademarks, copyrights, trade secrets, license agreements, confidentiality procedures, non-disclosure agreements, employee disclosure and invention assignment agreements, as well as other legal and contractual rights, to establish and protect our proprietary rights.

We have patents issued in the United States. These patents are intended to protect our proprietary inventions relevant to our business. We continually review our development efforts to assess the existence and patentability of new intellectual property. We intend to pursue additional patent protection to the extent we believe it would be beneficial and cost effective. In addition, our proprietary algorithm technologies, other than those incorporated into a patent application, are protected by trade secret laws.

We also hold trademarks in the United States as well as in other jurisdictions. “THREDUP” and “Think Secondhand First” are our registered trademarks in the United States. We have additional registered trademarks in the United States and “THREDUP” is registered in certain other non-United States jurisdictions. We will pursue additional trademark registrations to the extent we believe they would be beneficial and cost-effective. Other trademarks and trade names referred to in this annual report are the property of their respective owners.

We also have registered domain names for websites that we use in our business, such as www.thredup.com and other variations.

5

Table of Contents

Regulation

We are subject to a variety of United States federal and state laws as well as international laws that affect companies conducting business on the Internet and in the retail industry, many of which are still evolving and could be interpreted in ways that could harm our business. These laws and regulations include laws governing the processing of payments, consumer protection, privacy and other laws regarding unfair and deceptive trade practices. These laws and regulations could make internet advertising more expensive, require burdensome disclosure to consumers or visitors to our website and restrict our ability to use consumer information to improve targeted advertisements. Further, these laws and regulations are often complex, sometimes contradict other laws, and are frequently still evolving. Laws and regulations may be interpreted and enforced in different ways in various locations around the world, posing a significant challenge to our global business.

We are also subject to federal, state, and foreign laws and regulations regarding privacy and protection of consumer information. Our privacy policies describe our practices concerning the use, storage, transmission and disclosure of personal information, including buyer and seller data. Any failure by us to comply with our policies or privacy related laws and regulations could result in proceedings against us by governmental authorities or others, which could harm our business.

Many jurisdictions in which we operate have enacted laws and regulations requiring notification to users when there is a security breach of personal data, or requiring the adoption of minimum information security standards that are often vaguely defined and difficult to practically implement. This growing focus on data privacy and regulation of e-commerce worldwide could impose additional compliance burdens and costs on us and could subject us to significant operational costs for internal compliance and risk to our business. Further, any failure by us to adequately protect the privacy and data of our sellers and buyers could result in a loss of confidence in our marketplaces, which could adversely affect our business.

Apparel, shoes and accessories sold by us are also subject to regulation in the United States by governmental agencies, including the Federal Trade Commission and the Consumer Products Safety Commission. These regulations relate principally to product labeling, licensing requirements, flammability testing and product safety. We are also subject to environmental laws, rules and regulations. Similarly, apparel, shoes and accessories sold by us are also subject to import regulations in the United States concerning the use of wildlife products for commercial and non-commercial trade, including the United States Fish and Wildlife Service. We do not estimate any significant capital expenditures for environmental control matters either in 2026 or in the near future.

Human Capital Resources

As of December 31, 2025, we had 2,132 employees and professional contractors, including 1,817 distribution center employees. To our knowledge, none of our employees is represented by a labor union or covered by a collective bargaining agreement. We have not experienced any work stoppages and we consider our relations with our employees to be good. We supplement our workforce with contractors and consultants in the United States and internationally, including Ukrainian engineering specialists. These Ukrainian IT specialists, who provide services on our behalf, are registered as “private entrepreneurs” with the tax authorities of Ukraine and operate as independent contractors. While we do not anticipate a reduction in force due to conflict in Ukraine, we anticipate that at least some of our Ukrainian IT specialists may be unable to work while the military conflict is unresolved.

Our human capital resources objective is to cultivate a high-performing team by recruiting, retaining, incentivizing and integrating our existing and new employees and professional contractors. Our culture is underpinned by our core values, including an unwavering commitment to learning, development, inclusion, diversity, equity and belonging. We believe our people are our greatest asset and are reimagining our employee experience to reflect that philosophy. We work diligently to attract the best talent from a diverse range of sources in order to meet the current and future demands of our business. The core objective of our compensation program is to provide a package that will attract, motivate and reward exceptional employees who must operate in a highly competitive and technologically challenging environment.

We believe that a unique perspective is critical to solving complex problems and inspiring the world to think secondhand first. We are proud to maintain a workforce that is majority female and underrepresented minorities. We are committed to identifying talent from a range of backgrounds and experiences.

All full-time United States based employees are eligible to participate in our employee stock purchase plan and 401k plan. In addition, full-time United States-based exempt employees are eligible for an eight weeks paid sabbatical after three years of service .

6

Table of Contents

Available Information

The following filings are available through our investor relations website after we file them with the Securities and Exchange Commission (the “SEC”): Annual Report on Form 10-K, Quarterly Reports on Form 10-Q and our Proxy Statement for our Annual Meeting of Stockholders. These filings are also available for download free of charge on our investor relations website. Our investor relations website is located at ir.thredup.com. The SEC also maintains an Internet website that contains reports, proxy statements and other information about issuers, like us, that file electronically with the SEC. The address of that website is www.sec.gov.

We webcast our earnings calls and certain events we participate in or host with members of the investment community on our investor relations website. Additionally, we provide notifications of news or announcements regarding our financial performance, including SEC filings, investor events, press and earnings releases, and blogs as part of our investor relations website. We have used, and intend to continue to use, our investor relations website, our Twitter account (@thredup), our LinkedIn account (https://www.linkedin.com/company/thredup) and our Chief Executive Officer's LinkedIn account (https://www.linkedin.com/in/jamesgreinhart/), as means of disclosing material non-public information and for complying with our disclosure obligations under Regulation FD. Further corporate governance information, including our corporate governance guidelines, composition of our board and its committees, and Code of Conduct, is also available on our investor relations website under the heading “Corporate Governance.” The contents of our websites are not intended to be incorporated by reference into this Annual Report on Form 10-K or in any other report or document we file with the SEC, and any references to our websites are intended to be inactive textual references only.

Corporate Information

We were incorporated in 2009 under the name ThredUp Inc. as a Delaware corporation. Our principal executive offices are located at 969 Broadway, Suite 200, Oakland, CA 94607, and our telephone number is (415) 402-5202. Our website address is www.thredup.com. Information contained on, or that can be accessed through, our website does not constitute part of this Annual Report on Form 10-K.