•Record quarterly revenue of $82.2 million, representing an increase of 34% year-over-year

•Quarterly gross margin of 79.4% and an increase in gross profit of 34% year-over-year

•Active Buyers of 1.57 million, representing growth of 26% year-over-year, with new buyer growth of 54% year-over-year, reflecting ThredUp’s best quarter for new buyer acquisition in its history

•Ended the quarter with cash and cash equivalents, restricted cash, and marketable securities of $56.1 million, substantially consistent with the $56.2 million reported last quarter

•Issued a revised fourth quarter and full year 2025 financial outlook, raising revenue expectations

Oakland, CA — November 3, 2025 — ThredUp Inc. (Nasdaq: TDUP, LTSE: TDUP), one of the largest online resale platforms for apparel, shoes, and accessories, announced today its financial results for the third quarter ended September 30, 2025 and updated full year 2025 financial outlook.

“In Q3, we are proud to have delivered our fourth consecutive quarter of accelerating revenue growth, driven by exceptional new buyer acquisition and order growth,” said ThredUp CEO and co-founder James Reinhart. “This quarter, we launched a fully rebranded ThredUp experience, with new products and features that create a more personalized and engaging way to buy and sell secondhand. These advancements are enabled by years of investment in our data and technology infrastructure, positioning us to innovate faster and strengthen our competitive moat in the growing resale market.”

Third Quarter 2025 Financial Highlights1

•Revenue: Revenue totaled $82.2 million, an increase of 34% year-over-year.

•Gross Profit and Gross Margin: Gross profit totaled $65.2 million, an increase of 34% year-over-year. Gross margin was 79.4% as compared to 79.3% in the third quarter last year.

•Loss from Continuing Operations: Loss from continuing operations was $4.2 million, or a negative 5.2% of revenue, for the third quarter 2025, compared to a loss from continuing operations of $10.4 million, or a negative 16.8% of revenue, for the third quarter last year.

1 Adjusted EBITDA from continuing operations and Adjusted EBITDA from continuing operations margin are non-GAAP measures. See “Reconciliation of GAAP to Non-GAAP Financial Measures” for a detailed reconciliation of these non-GAAP measures to the most directly comparable GAAP measures and “Non-GAAP Financial Measures and Other Operating and Business Metrics” for a discussion of why we believe these non-GAAP measures are useful.

•Adjusted EBITDA from Continuing Operations1: Adjusted EBITDA from continuing operations was $3.8 million, or 4.6% of revenue, for the third quarter 2025, compared to $0.3 million, or 0.5% of revenue, for the third quarter last year.

•Active Buyers and Orders: Active Buyers of 1.57 million and Orders of 1.61 million for the third quarter 2025, representing increases of 26% and 37%, respectively, over the third quarter last year.

For the fourth quarter 2025, ThredUp expects:

•Revenue in the range of $76.0 million to $78.0 million, +14% year-over-year at the midpoint

•Gross margin in the range of 78.0% to 79.0%

•Adjusted EBITDA margin of approximately 3.0%

For the full fiscal year 2025, ThredUp expects:

•Revenue in the range of $307.0 million to $309.0 million, +18% year-over-year at the midpoint

•Gross margin in the range of 79.0% to 79.2%

•Adjusted EBITDA margin of approximately 4.2%

ThredUp is not providing a quantitative reconciliation of forward-looking guidance of the Non-GAAP measure Adjusted EBITDA margin to net loss margin, the most directly comparable financial measures under GAAP because certain items are out of ThredUp’s control or cannot be reasonably predicted. We calculate Adjusted EBITDA as net loss adjusted to exclude, where applicable in a given period, stock-based compensation expense, depreciation and amortization, interest expense, provision (benefit) for income taxes, severance and other reorganization costs, and gain on sale of non-marketable equity investment. Adjusted EBITDA margin represents Adjusted EBITDA divided by Revenue for the same period. Accordingly, a reconciliation for Adjusted EBITDA in order to calculate forward-looking Adjusted EBITDA margin is not available without unreasonable effort. However, for the fourth quarter of 2025 and full year 2025, Depreciation and amortization is expected to be $3.2 million and $12.7 million, respectively. In addition, for the fourth quarter of 2025 and full year 2025, Stock-based compensation expense is expected to be $3.8 million and $18.3 million, respectively. These items are uncertain, depend on various factors, and could result in projected net loss being materially greater than is indicated by the currently estimated Adjusted EBITDA margin.

ThredUp is not providing a quantitative reconciliation for free cash flow estimates on a forward-looking basis because it is unable, without making unreasonable efforts, to provide a meaningful or reasonably accurate calculation or estimation of net cash provided by operating activities and certain reconciling items on a forward-looking basis, which could be significant to the Company's results.

•The live and archived webcast and all related earnings materials will be available at ThredUp’s investor relations website: ir.thredup.com/news-events/events-and-presentations.

ir@thredup.com

media@thredup.com

This press release contains forward-looking statements within the meaning of the federal securities laws, which are statements that involve substantial risks and uncertainties. Forward-looking statements generally relate to future events or our future financial or operating performance. In some cases, you can identify forward-looking statements because they contain words such as “may,” “will,” “shall,” “should,” “expects,” “plans,” “anticipates,” “could,” “intends,” “target,” “projects,” “contemplates,” “believes,” “estimates,” “predicts,” “potential”, “looking ahead”, “looking forward,” “seeking” or “continue” or the negative of these words or other similar terms or expressions that concern our expectations, strategy, plans or intentions. Forward-looking statements in this release include, but are not limited to, guidance on financial results for the fourth quarter and full year of 2025; statements about future free cash flow, operating results, capital expenditures and other developments in our business and our long term growth; trends, consumer demand and growth in the online resale markets; the momentum of our business; our investments in technology and infrastructure, including with respect to AI technologies; the impact of tariffs and other changes to global trade on our business; the success and expansion of our RaaS® model and the timing and plans for future RaaS® clients; the implementation and success of direct selling on ThredUp; our ability to attract new Active Buyers, including our efforts to make resale more engaging and accessible to a wider audience through innovative shopping experiences, such as the launch of our rebrand; and legal and regulatory developments.

Forward-looking statements are neither historical facts nor assurances of future performance. Forward-looking statements involve substantial risks and uncertainties that may cause actual results to differ materially from those that we expect. These risks and uncertainties include, but are not limited to: our ability to attract new users and convert users into buyers, Active Buyers, and sellers; our ability to achieve profitability; the sufficiency of our cash, cash equivalents and capital resources to meet our liquidity needs; our ability to effectively manage or sustain our growth and to effectively expand our operations; risks from an intensely competitive market; our ability to effectively deploy new and evolving technologies, such as artificial intelligence and machine learning, in our offerings; risks arising from economic and industry trends, including tariffs, inflationary pressures, changes in interest rates, changing consumer habits, climate change and general global economic uncertainty; our ability to comply with applicable laws and regulations; and our ability to successfully integrate and realize the benefits of our past or future strategic acquisitions or investments. More information on these risks and other potential factors that could affect the Company’s business, reputation, results of operations, financial condition, and stock price is included in the Company’s filings with the Securities and Exchange Commission (“SEC”), including in the “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” sections of the Company’s most recently filed periodic reports on Form 10-K and Form 10-Q and subsequent filings. The forward-looking statements in this release are based on information available to us as of the date hereof, and we disclaim any obligation to update any forward-looking statements, except as required by law. These forward-looking statements should not be relied upon as representing ThredUp’s views as of any date subsequent to the date of this press release.

ThredUp intends to announce material information to the public through the ThredUp Investor Relations website ir.thredup.com, SEC filings, press releases, public conference calls, and public webcasts. ThredUp uses these channels, as well as social media, to communicate with its investors, customers, and the public about the company, its offerings, and other issues. It is possible that the information ThredUp posts on social media could be deemed to be material information. As such, ThredUp encourages investors, the media, and others to follow the channels listed above, including the social media channels listed on ThredUp’s investor relations website, and to review the information disclosed through such channels.

This press release and the accompanying tables contain non-GAAP financial measures, including: Adjusted EBITDA from continuing operations, Adjusted EBITDA from continuing operations margin, free cash flow and other operating and business metrics. In addition to our results determined in accordance with GAAP, we believe that these non-GAAP financial measures and other operating and business metrics, are useful in evaluating our operating performance and enhancing an overall understanding of our financial position. We use these measures and metrics to evaluate and assess our operating performance, and for internal planning and forecasting purposes. We believe that these non-GAAP financial measures, when taken collectively with our GAAP results, may be helpful to investors because they provide consistency and comparability with past financial performance and assist in comparisons with other companies, some of which use similar non-GAAP financial information to supplement their GAAP results. Our non-GAAP financial measures and other operating and business metrics are presented for supplemental informational purposes only, should not be considered a substitute for financial information presented in accordance with GAAP and may be different from similarly-titled non-GAAP financial measures and other operating and business metrics used by other companies.

A reconciliation is provided above for Non-GAAP Adjusted EBITDA from continuing operations to Loss from continuing operations, the most directly comparable financial measure stated in accordance with GAAP. We calculate Non-GAAP Adjusted EBITDA from continuing operations as loss from continuing operations adjusted to exclude, where applicable in a given period, stock-based compensation expense, depreciation and amortization, interest expense, provision (benefit) for income taxes, severance and other reorganization costs, and gain on sale of non-marketable equity investment. Non-GAAP Adjusted EBITDA from continuing operations margin represents Non-GAAP Adjusted EBITDA from continuing operations divided by Revenue for the same period.

A reconciliation is provided above for Non-GAAP free cash flow from continuing operations to Net cash provided by continuing operating activities, the most directly comparable financial measure stated in accordance with GAAP. We calculate Non-GAAP free cash flow as Net cash provided by continuing operating activities reduced by Purchases of property and equipment.

ir@thredup.com

media@thredup.com

This financial supplement contains forward-looking statements within the meaning of the federal securities laws, which are statements that involve substantial risks and uncertainties. Forward-looking statements generally relate to future events or our future financial or operating performance. In some cases, you can identify forward-looking statements because they contain words such as “may,” “will,” “shall,” “should,” “expects,” “plans,” “anticipates,” “could,” “intends,” “target,” “projects,” “contemplates,” “believes,” “estimates,” “predicts,” “potential”, “looking forward,” “seeking” or “continue” or the negative of these words or other similar terms or expressions that concern our expectations, strategy, plans or intentions. Forward-looking statements in this financial supplement include, but are not limited to, guidance on financial results for the fourth and full year of 2025; statements about future operating results, capital expenditures and other developments in our business and our long term growth; trends, consumer demand and growth in the online resale markets; the momentum of our business; our investments in technology and infrastructure, including with respect to AI technologies such as AI enabled search features and image search; the success and expansion of our RaaS® model and the timing and plans for future RaaS® clients; our ability to attract new Active Buyers, including our efforts to make resale more engaging and accessible to a wider audience through innovative shopping experiences; and our ability to successfully integrate and realize the benefits of our past or future strategic acquisitions, investments or divestitures and legal and regulatory developments.

More information on these risks and other potential factors that could affect the Company’s business, reputation, results of operations, financial condition, and stock price is included in the Company’s filings with the Securities and Exchange Commission (“SEC”), including in the “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” sections of the Company’s most recently filed periodic reports on Form 10-K and Form 10-Q and subsequent filings. The forward-looking statements in this financial supplement are based on information available to us as of the date hereof, and we disclaim any obligation to update any forward-looking statements, except as required by law. These forward-looking statements should not be relied upon as representing ThredUp’s views as of any date subsequent to the date of this financial supplement.

This financial supplement and the accompanying tables contain non-GAAP financial measures: Adjusted EBITDA from continuing operations, Adjusted EBITDA from continuing operations margin, and Non-GAAP operating expenses. In addition to our results determined in accordance with GAAP, we believe that these non-GAAP financial measures, are useful in evaluating our operating performance. We use these non-GAAP financial measures to evaluate and assess our operating performance and the operating leverage in our business, and for internal planning and forecasting purposes. We believe that these non-GAAP financial measures, when taken collectively with our GAAP results, may be helpful to investors because they provide consistency and comparability with past financial performance and assist in comparisons with other companies, some of which use similar non-GAAP financial information to supplement their GAAP results. These non-GAAP financial measures are presented for supplemental informational purposes only, should not be considered a substitute for financial information presented in accordance with GAAP and may be different from similarly-titled non-GAAP financial measures used by other companies.

A reconciliation is provided above for Non-GAAP Adjusted EBITDA from continuing operations to loss from continuing operations, the most directly comparable financial measures stated in accordance with GAAP. We calculate Adjusted EBITDA from continuing operations as loss from continuing operations adjusted to exclude, where applicable in a given period, stock-based compensation expense, depreciation and amortization, interest expense, provision (benefit) for income taxes, severance and other reorganization costs, and gain on sale of non-marketable equity investment.

A reconciliation is provided above for Non-GAAP operating expenses to Total operating expenses, the most directly comparable financial measures stated in accordance with GAAP. Non-GAAP operating expenses are Total operating expenses adjusted to exclude stock-based compensation expense and severance and other reorganization costs.

A reconciliation is provided above for Non-GAAP free cash flow to Net cash provided by continuing operating activities, the most directly comparable financial measure stated in accordance with GAAP. We calculate Non-GAAP free cash flow as Net cash provided by continuing operating activities reduced by Purchases of property and equipment.

ThredUp is not providing a quantitative reconciliation of forward-looking guidance of the non-GAAP measures above, including Adjusted EBITDA margin to net loss margin, the most directly comparable financial measure under GAAP, because certain items are out of ThredUp’s control or cannot be reasonably predicted. We calculate Adjusted EBITDA as net loss adjusted to exclude, where applicable in a given period, stock-based compensation expense, depreciation and amortization, interest expense, provision (benefit) for income taxes, severance and other reorganization costs, and gain on sale of non-marketable equity investment. Adjusted EBITDA margin represents Adjusted EBITDA divided by Revenue for the same period. Accordingly, a reconciliation for Adjusted EBITDA in order to calculate forward-looking Adjusted EBITDA margin is not available without unreasonable effort. These items are uncertain, depend on various factors, and could result in projected net loss margin being materially greater than is indicated by the currently estimated Adjusted EBITDA margin.