•Quarterly revenue of $71.3 million, representing a 2% decline year-over-year. Fourth quarter gross margin of 63.1% and gross profit decline of 7% year-over-year.

•Full year revenue of $288.4 million, representing 15% growth year-over-year. Full year gross margin of 66.7% and gross profit growth of 8% year-over-year.

•Active Buyers of 1.7 million and Orders of 1.5 million in Q4 2022, representing year-over-year declines of 2% and 8%, respectively. Record annual orders of 6.5 million, representing growth of 22% year-over-year.

•Reached 42 Resale-as-a-Service (RaaS) brand clients by year-end 2022, and continuing to expand the program in 2023 with J. Crew, kate spade new york, and francesca’s.

Oakland, CA — March 6, 2023 — ThredUp Inc. (Nasdaq: TDUP), one of the largest online resale platforms for apparel, shoes, and accessories, today announced its financial results for the fourth quarter and full year ended December 31, 2022.

“We are proud to deliver strong Q4 results in what continues to be a highly competitive environment" said thredUP CEO and co-founder James Reinhart. “By investing in growth and rigorously managing expenses, we believe we're well positioned to capture an apparel market recovery as the consumer continues to seek value in 2023.”

•Revenue: Total revenue of $71.3 million, a 2% decline year-over-year.

•Gross Profit and Gross Margin: Gross profit totaled $45.0 million, representing a decline of 7% year-over-year. Gross margin was 63.1% as compared to 66.1% in the fourth quarter last year.

•Net Loss Attributable to Common Stockholders: GAAP net loss attributable to common stockholders was $19.5 million, or a negative 27.3% of revenue, for the fourth quarter 2022, compared to a GAAP net loss attributable to common stockholders of $17.9 million, or a negative 24.6% of revenue, for the fourth quarter 2021.

•Adjusted EBITDA and EBITDA Margin1: Adjusted EBITDA loss was $5.8 million, or a negative 8.2% of revenue, for the fourth quarter 2022, compared to an Adjusted EBITDA loss of $10.5 million, or a negative 14.5% of revenue, for the fourth quarter 2021.

•Active Buyers and Orders: Active Buyers of 1.7 million and Orders of 1.5 million, representing a decline of 2% and 8%, respectively, over the comparable quarter last year.

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

•Revenue: Total revenue of $288.4 million, an increase of 15% year-over-year.

•Gross Profit and Gross Margin: Gross profit totaled $192.3 million, representing an increase of 8% year-over-year. Gross margin was 66.7% compared to 70.7% last year.

•Net Loss Attributable to Common Stockholders: GAAP net loss attributable to common stockholders was $92.3 million, or a negative 32.0% of revenue, for the full year 2022, compared to a GAAP net loss attributable to common stockholders of $63.2 million, or a negative 25.1% of revenue, for the full year 2021.

•Adjusted EBITDA and EBITDA Margin1: Adjusted EBITDA loss was $43.4 million, or a negative 15.0% of revenue, for the full year 2022, compared to the Adjusted EBITDA loss of $36.5 million, or a negative 14.5% of revenue, for the full year 2021.

•Orders: Record orders of 6.5 million for the full year 2022, growing 22% over 5.3 million for the full year 2021.

•Resale-as-a-Service® (“RaaS®”): thredUP ended 2022 with 42 client brands and continues to expand its RaaS roster in 2023, launching new programs with J. Crew, kate spade new york, and francesca’s.

•Opened flagship distribution center in Dallas: thredUP brought its newest distribution center online in December 2022. At full capacity, this will increase overall network storage capacity by 150%.

•Released Inaugural Impact Report: thredUP released its inaugural Impact Report in October 2022, which outlines the company's business and brand-aligned environmental, social, and governance (ESG) strategy and details the progress made across initiatives in 2021 against SASB and GRI disclosure frameworks.

For the first quarter 2023, thredUP expects:

•Revenue in the range of $71 million to $73 million

•Gross margin in the range of 66.0% to 68.0%

•Adjusted EBITDA loss margin in the range of 12.0% to 10.0%

For the full fiscal year 2023, thredUP expects:

•Revenue in the range of $310 million to $320 million

•Gross margin in the range of 66.0% to 68.0%

•Adjusted EBITDA loss margin in the range of 8.0% to 6.0%

•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

thredUP is transforming resale with technology and a mission to inspire a new generation of consumers to think secondhand first. By making it easy to buy and sell secondhand, thredUP has become one of the world's largest online resale platforms for apparel, shoes and accessories. Sellers love 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. Buyers love shopping value, premium and luxury brands all in one place, at up to 90% off estimated retail price. Our proprietary operating platform is the foundation for our managed marketplace and consists of distributed processing infrastructure, proprietary software and systems and data science expertise. With thredUP’s Resale-as-a-Service, some of the world's leading brands and retailers are leveraging our platform to deliver customizable, scalable resale experiences to their customers. thredUP has processed over 137 million unique secondhand items from 55,000 brands across 100 categories. By extending the life cycle of clothing, thredUP is changing the way consumers shop and ushering in a more sustainable future for the fashion industry.

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” 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 first quarter and full year of 2023; statements about future operating results and our long term growth; the momentum of our business; the growth rates in the markets in which we compete; the impact of the COVID-19 pandemic and its varied social and macroeconomic consequences, inflationary pressures, increased interest rates and general global economic uncertainty on consumer behavior and our business; our investments in technology and infrastructure; our ability to successfully integrate and realize the benefits of our past or future strategic acquisitions, investments or restructuring activities; the success and expansion of our RaaS® model and the timing and plans for future RaaS® clients; and our ability to attract new Active Buyers.

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.

This press release and the accompanying tables contain non-GAAP financial measures: Adjusted EBITDA and Adjusted EBITDA margin. In addition to our results determined in accordance with GAAP, we believe that Adjusted EBITDA and Adjusted EBITDA margin, non-GAAP measures, are useful in evaluating our operating performance. We use Adjusted EBITDA and Adjusted EBITDA margin to evaluate and assess our operating performance and the operating leverage in our business, and for internal planning and forecasting purposes. We believe that Adjusted EBITDA and Adjusted EBITDA margin, 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. Adjusted EBITDA and Adjusted EBITDA margin 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 measures used by other companies.

A reconciliation is provided above for Adjusted EBITDA to net loss attributable to common stockholders, the most directly comparable financial measure stated in accordance with GAAP. We calculate Adjusted EBITDA as net loss attributable to common stockholders adjusted to exclude, where applicable in a given period, stock-based compensation expense, depreciation and amortization, impairment of non-marketable equity investment, restructuring charges, interest expense, acquisition-related expenses, provision for income taxes, change in fair value of convertible preferred stock warrant liability.

Investors are encouraged to review our results determined in accordance with GAAP and the reconciliation of Adjusted EBITDA to net loss attributable to common stockholders. thredUP is not providing a quantitative reconciliation of forward-looking guidance of Adjusted EBITDA to net loss attributable to common stockholders because certain items are out of thredUP’s control or cannot be reasonably predicted. Historically, these items have included, but are not limited to, depreciation and amortization, stock-based compensation expense, change in fair value of convertible preferred stock warrant liability and provision for income taxes. Accordingly, a reconciliation for Adjusted EBITDA in order to calculate forward-looking Adjusted EBITDA margin is not available without unreasonable effort. However, for the first quarter of 2023 and full year 2023, depreciation and amortization is expected to be $4.3 million and $19.9 million, respectively. In addition, for the first quarter of 2023 and full year 2023, stock-based compensation expense is expected to be $8.8 million and $38.8 million, respectively. These items are uncertain, depend on various factors, and could result in projected net loss attributable to common stockholders being materially less than is indicated by the currently estimated Adjusted EBITDA margin.

ir@thredup.com

media@thredup.com

thredUP is transforming resale with technology and a mission to inspire a new generation of consumers to think secondhand first. By making it easy to buy and sell secondhand, thredUP has become one of the world's largest online resale platforms for women's and kids' apparel, shoes and accessories. Sellers love 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. Buyers love shopping value, premium and luxury brands all in one place, at up to 90% off estimated retail price. Our proprietary operating platform is the foundation for our managed marketplace and consists of distributed processing infrastructure, proprietary software and systems and data science expertise. With thredUP's Resale-as-a-Service, some of the world's leading brands and retailers are leveraging our platform to deliver customizable, scalable resale experiences to their customers. thredUP has processed over 137 million unique secondhand items from 55,000 brands across 100 categories. By extending the life cycle of clothing, thredUP is changing the way consumers shop and ushering in a more sustainable future for the fashion industry.

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” 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 first quarter and full year of 2023; statements about future operating results and our long term growth; the momentum of our business; the growth rates in the markets in which we compete; the impact of the COVID-19 pandemic and its varied social and macroeconomic consequences, inflationary pressures, increased interest rates and general global economic uncertainty on consumer behavior and our business; our investments in technology and infrastructure; our ability to successfully integrate and realize the benefits of our past or future strategic acquisitions, investments or restructuring activities; the success and expansion of our RaaS® model and the timing and plans for future RaaS® clients; and our ability to attract new Active Buyers.

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, Adjusted EBITDA margin, and Adjusted operating expenses. In addition to our results determined in accordance with GAAP, we believe that Adjusted EBITDA, Adjusted EBITDA margin, and Adjusted operating expenses, non-GAAP measures, are useful in evaluating our operating performance. We use Adjusted EBITDA, Adjusted EBITDA margin, and Adjusted operating expenses to evaluate and assess our operating performance and the operating leverage in our business, and for internal planning and forecasting purposes. We believe that Adjusted EBITDA, Adjusted EBITDA margin, and Adjusted operating expenses, 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. Adjusted EBITDA, Adjusted EBITDA margin, and Adjusted operating expenses 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 measures used by other companies.

A reconciliation is provided above for Adjusted EBITDA to net loss attributable to common stockholders and Adjusted operating expenses to reported operating expenses, the most directly comparable financial measures stated in accordance with GAAP. We calculate Adjusted EBITDA as net loss attributable to common stockholders adjusted to exclude, where applicable in a given period, stock-based compensation expense, depreciation and amortization, impairment of non-marketable equity investment, restructuring charges, interest expense, acquisition-related expenses, provision for income taxes, change in fair value of convertible preferred stock warrant liability. We calculate Adjusted operating expenses as operating expenses adjusted to exclude stock-based compensation expense.

Investors are encouraged to review our results determined in accordance with GAAP and the reconciliation of Adjusted EBITDA to net loss attributable to common stockholders and Adjusted operating expenses to operating expenses. thredUP is not providing a quantitative reconciliation of forward-looking guidance of Adjusted EBITDA to net loss attributable to common stockholders or Adjusted operating expenses to operating expenses because certain items are out of thredUP’s control or cannot be reasonably predicted. Historically, these items have included, but are not limited to, depreciation and amortization, stock-based compensation expense, change in fair value of convertible preferred stock warrant liability and provision for income taxes. Accordingly, a reconciliation for Adjusted EBITDA in order to calculate forward-looking Adjusted EBITDA margin is not available without unreasonable effort. However, for the first quarter of 2023 and full year 2023, depreciation and amortization is expected to be $4.3 million and $19.9 million, respectively. In addition, for the first quarter of 2023 and full year 2023, stock-based compensation expense is expected to be $8.8 million and $38.8 million, respectively. These items are uncertain, depend on various factors, and could result in projected net loss attributable to common stockholders being materially less than is indicated by the currently estimated Adjusted EBITDA margin.