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    Which Auditors Public Companies Use in 2024

    Introduction

    Independent registered public accounting firms play a crucial role in providing audit services to public companies, ensuring the accuracy of financial statements and compliance with regulatory requirements. This analysis examines which accounting firms serve as auditors for public companies, based on disclosures in 2024 10-K annual reports.

    The data reveals the dominance of the Big Four accounting firms (Deloitte, EY, KPMG, PwC) and provides insights into the competitive landscape of public company audit services, including regional and specialized firms serving smaller public companies.

    Public Accounting Firm Details
    Companies and their independent registered public accounting firms based on 2024 10-K filings.
    TickerAuditorDetails
    APricewaterhouseCoopers LLP

    Agilent Technologies, Inc. is audited by PricewaterhouseCoopers LLP as their independent registered public accounting firm. The firm audited the company's consolidated financial statements and internal control over financial reporting as of October 31, 2024, and stated that the consolidated financial statements present fairly, in all material respects, the financial position, results of operations, and cash flows in conformity with generally accepted accounting principles in the United States, and concluded that the company maintained effective internal control over financial reporting.

    AAPricewaterhouseCoopers LLP

    Alcoa Corporation is audited by PricewaterhouseCoopers LLP as their independent registered public accounting firm. The firm audited the company's financial statements and internal control over financial reporting as of December 31, 2023, and concluded that the consolidated financial statements present fairly and internal control over financial reporting was effective.

    AALKPMG LLP

    American Airlines Group Inc. is audited by KPMG LLP as their independent registered public accounting firm. KPMG LLP provided an unqualified opinion on the consolidated financial statements and an unqualified opinion on the effectiveness of internal control over financial reporting for the fiscal year ended December 31, 2023.

    AAONGrant Thornton LLP

    AAON is audited by Grant Thornton LLP as their independent registered public accounting firm. The firm issued their reports dated February 28, 2024, with respect to AAON's consolidated financial statements and internal control over financial reporting for the year ended December 31, 2023. Grant Thornton LLP provided an unqualified opinion on both the financial statements and the effectiveness of internal control over financial reporting.

    AAPLErnst & Young LLP

    Apple Inc. is audited by Ernst & Young LLP as their independent registered public accounting firm for the fiscal year 2024. The firm expressed an unqualified opinion on Apple's consolidated financial statements.

    ABBVErnst & Young LLP

    AbbVie is audited by Ernst & Young LLP as their independent registered public accounting firm. Ernst & Young LLP provided an unqualified audit opinion on both the consolidated financial statements and the effectiveness of AbbVie's internal control over financial reporting for the fiscal year ended December 31, 2023.

    ABNBPricewaterhouseCoopers LLP

    Airbnb is audited by PricewaterhouseCoopers LLP as their independent registered public accounting firm. In their audit opinion, they stated that the consolidated financial statements present fairly, in all material respects, the financial position as of December 31, 2023 and 2022, and the results of operations and cash flows for the three years ended December 31, 2023. They also opined that Airbnb maintained effective internal control over financial reporting as of December 31, 2023.

    ABTErnst & Young LLP

    Abbott Laboratories is audited by Ernst & Young LLP as their independent registered public accounting firm. Ernst & Young LLP audited the consolidated financial statements of Abbott Laboratories and subsidiaries for the fiscal year ended December 31, 2023, and expressed an unqualified opinion on the effectiveness of Abbott's internal control over financial reporting as of December 31, 2023.

    ACGLPricewaterhouseCoopers LLP

    Arch Capital Group Ltd. is audited by PricewaterhouseCoopers LLP as their independent registered public accounting firm. In their audit opinion, they stated that the consolidated financial statements present fairly, in all material respects, the financial position of the company as of December 31, 2023, and 2022, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2023, in conformity with accounting principles generally accepted in the United States of America. They also opined that the company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2023.

    ACHRPricewaterhouseCoopers LLP

    Archer Aviation Inc. is audited by PricewaterhouseCoopers LLP as their independent registered public accounting firm. The firm has served as Archer's auditor since 2020. In their audit opinion for the fiscal year ended December 31, 2023, PricewaterhouseCoopers LLP stated that the consolidated financial statements present fairly, in all material respects, the financial position of the company and its subsidiaries. They also concluded that Archer maintained effective internal control over financial reporting as of December 31, 2023.

    ACIDeloitte & Touche LLP

    Albertsons Companies, Inc. is audited by Deloitte & Touche LLP as their independent registered public accounting firm. Deloitte & Touche LLP expressed an unqualified opinion on the consolidated financial statements for the fiscal year ended February 24, 2024, and also provided an unqualified opinion on the effectiveness of the company's internal control over financial reporting as of February 24, 2024.

    ACMErnst & Young LLP

    AECOM is audited by Ernst & Young LLP as their independent registered public accounting firm. They issued an unqualified opinion on the consolidated financial statements and internal control over financial reporting for the fiscal year ended September 30, 2024.

    ACNKPMG LLP

    Accenture plc is audited by KPMG LLP as their independent registered public accounting firm. In the 2024 annual report, KPMG LLP provided audit opinions on both the consolidated financial statements for the fiscal years ended August 31, 2024, 2023, and 2022, concluding they present fairly the financial position, results of operations, and cash flows in conformity with U.S. GAAP. They also concluded that Accenture maintained effective internal control over financial reporting as of August 31, 2024.

    ACTKPMG LLP

    Enact Holdings, Inc. is audited by KPMG LLP as their independent registered public accounting firm. KPMG LLP expressed an unqualified opinion on the consolidated financial statements for the years ended December 31, 2023, 2022, and 2021, and an unqualified opinion on the effectiveness of the company's internal control over financial reporting as of December 31, 2023.

    ADBEKPMG LLP

    Adobe Inc. is audited by KPMG LLP as their independent registered public accounting firm. In their audit opinion, KPMG LLP stated that the consolidated financial statements present fairly, in all material respects, the financial position of Adobe Inc. as of December 1, 2023, and December 2, 2022, and the results of its operations and cash flows for each of the fiscal years in the three-year period ended December 1, 2023, in conformity with U.S. generally accepted accounting principles. Additionally, KPMG LLP opined that Adobe maintained effective internal control over financial reporting as of December 1, 2023, based on criteria established in the Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.

    ADCGrant Thornton LLP

    Agree Realty Corporation is audited by Grant Thornton LLP as their independent registered public accounting firm. The firm issued its reports dated February 13, 2024, with respect to the consolidated financial statements and internal control over financial reporting included in the Annual Report on Form 10-K for the year ended December 31, 2023.

    ADIErnst & Young LLP

    Analog Devices, Inc. is audited by Ernst & Young LLP as their independent registered public accounting firm. Ernst & Young LLP provided an unqualified audit opinion on the consolidated financial statements for the fiscal year ended November 2, 2024, and concluded that the internal control over financial reporting was effective as of November 2, 2024.

    ADMErnst & Young LLP

    ADM is audited by Ernst & Young LLP as their independent registered public accounting firm. Ernst & Young LLP provided an opinion on ADM's consolidated financial statements for the fiscal year ended December 31, 2023, and issued an adverse opinion on ADM's internal control over financial reporting as of December 31, 2023, due to a material weakness.

    ADPDeloitte & Touche LLP

    ADP is audited by Deloitte & Touche LLP as their independent registered public accounting firm. Deloitte & Touche LLP expressed an unqualified opinion on ADP's consolidated financial statements and on the effectiveness of ADP's internal control over financial reporting for the fiscal year ended June 30, 2024.

    ADSKErnst & Young LLP

    Autodesk, Inc. is audited by Ernst & Young LLP as their independent registered public accounting firm. The firm expressed an unqualified opinion on the financial statements and internal control over financial reporting for the fiscal year ended January 31, 2024.

    Showing 20 of 940 companies
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    Analysis

    The public company audit market is heavily concentrated among the Big Four accounting firms: Deloitte & Touche LLP, Ernst & Young LLP, KPMG LLP, and PricewaterhouseCoopers LLP. These firms collectively audit the vast majority of large public companies and Fortune 500 enterprises.

    Regional and mid-tier accounting firms serve an important role in auditing smaller public companies, including BDO USA LLP, Grant Thornton LLP, RSM US LLP, and Marcum LLP. These firms often specialize in specific industries or geographic regions and provide competitive alternatives to the Big Four.

    Auditor tenure varies significantly across companies, with some long-standing relationships spanning decades and others rotating auditors more frequently. The choice of auditor reflects factors including company size, complexity, industry expertise requirements, and audit committee preferences.

    This data is extracted from 2024 10-K annual reports using Fintool's AI-powered analysis, providing comprehensive insights into the public company audit landscape and accounting firm market positions.