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Proto Labs Inc

For the period ended Dec 31, 2024. Filed Feb 21, 2025.

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A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2024 · Filed Feb 21, 2025

PRLB$69.09+5.2%Stored close · as of Nov 9, 2026

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Contents

Report of Independent Registered Public Accounting Firm on Consolidated Financial Statements

Report of Independent Registered Public Accounting Firm

To the Shareholders and the Board of Directors of Proto Labs, Inc.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Proto Labs, Inc. (the Company) as of December 31, 2024 and 2023, the related consolidated statements of comprehensive income, shareholders' equity and cash flows for each of the three years in the period ended December 31, 2024, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2024 and 2023, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2024, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2024, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework), and our report dated February 21, 2025 expressed an unqualified opinion thereon.

Basis for Opinion

These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial statements that was communicated or required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective or complex judgments. The communication of the critical audit matter does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the account or disclosure to which it relates.

Revenue Recognition – Revenue Recognized Over Time
Description of the MatterAs discussed in the notes to the consolidated financial statements, the Company provides quality, quick-turn prototyping and on-demand manufacturing services. The majority of revenue recognized in a reporting period is based on completed, invoiced contracts. The Company manufactures custom parts to specific customer orders that have no alternative use to the Company, and the Company believes that there is a legally enforceable right to payment for performance completed to date on the internally and outsourced manufacturing parts. Revenue is recognized over time for internal and outsourced manufactured parts which meet these two criteria. For revenue recognized over time, management uses the input method based on time in production as a percentage of total estimated production time to measure progress toward satisfying performance obligations using the estimated total time necessary to complete the parts per the customer's order and an estimate of inventory and production costs incurred to date. Auditing revenue recognized over time was challenging because the relevant accounting standard requires the Company to estimate the progress towards satisfaction of performance obligations, applying a single appropriate method to measure progress. The input method requires an analysis of the incurred time in production and an estimate of the total time necessary to complete the total parts per the customer’s order. The Company also estimates inventory and production costs incurred to date. These estimates are based on management’s assessment of the current status of production as well as historical results.
How We Addressed the Matter in Our AuditWe obtained an understanding, evaluated the design and tested the operating effectiveness of controls over the Company’s process for recognizing revenue over time. This included testing controls over management’s evaluation of contract terms, the estimation of production time incurred to date and total production time used in the input method, estimation of a reasonable profit margin and the completeness and accuracy of the data used in the input method. To test the Company’s revenue recognition over time, we performed audit procedures that included, among others, inspecting a sample of contracts to evaluate the existence of an enforceable right to payment for performance completed to-date, evaluating the progress towards completion of orders in process through examination of a sample of product shipments subsequent to the end of the reporting period, evaluating the reasonableness of management’s estimate of profit margins based on a comparison to historical margins, testing the appropriateness of the timing and amount of revenue recognized over time based on the underlying inputs, and performing an independent sensitivity analysis to evaluate the impact on revenues of changes in significant assumptions.

/s/Ernst & Young LLP

We have served as the Company’s auditor since 2011.

Minneapolis, Minnesota

February 21, 2025

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