S-1/A: Andersen Group Files S-1/A for IPO, Reveals Strong Growth

Andersen Group Inc. filed an S-1/A for its initial public offering, highlighting robust revenue and Adjusted EBITDA growth, alongside a complex reorganization and significant tax-related payment obligations.

Summary

• Andersen Group Inc. is a leading U.S. provider of independent tax, valuation, and financial advisory services, operating without an audit practice.
• The company has achieved a 15% revenue compound annual growth rate (CAGR) since 2003 and a 24% net income CAGR since 2009 through 2024.
• Revenue for the nine months ended September 30, 2025, increased by 13% to $668.3 million, up from $589.2 million in the prior year period.
• Net income for the nine months ended September 30, 2025, decreased to $65.7 million from $144.5 million in the prior year period, primarily due to $136.5 million in non-cash equity-based compensation.
• Adjusted EBITDA Margin for the nine months ended September 30, 2025, improved to 33% from 26% in the prior year period.
• The company operates through an umbrella partnership C-corporation (UP-C) structure, with Andersen Group Inc. as the managing member of AT Umbrella LLC.
• A Tax Receivable Agreement (TRA) will obligate Andersen Group Inc. to pay TRA Parties 85% of certain tax benefits, estimated to be substantial (aggregating approximately $ million over 15 years, with yearly payments ranging from $ million to $ million).
• AT Umbrella LLC will issue promissory notes (HO Note for $166.8 million at 7.62% over 8 years and CA Notes for $189.3 million at 6.33%-7.50% over 1-7 years) to Aggregator.
• The company identified material weaknesses in internal control over financial reporting related to IT general controls and period-end financial reporting detective controls.
• A $9.5 million gain was recognized in the nine months ended September 30, 2025, due to the reversal of a legal accrual after a former employee's charges were dismissed.

Sentiment

Score: 6

Explanation: While the company demonstrates strong underlying operational growth (revenue, Adjusted EBITDA) and a clear strategic vision, the significant GAAP net income decline in the most recent period due to non-cash expenses, coupled with identified material weaknesses and substantial future payment obligations under the TRA and promissory notes, introduces notable financial and operational complexities for a new public company. The IPO itself is a positive step for capital access and growth, but the immediate financial impact of the non-cash charges and the long-term liabilities warrant a cautious but optimistic sentiment.

Positives

• Demonstrated strong historical growth with a 15% revenue CAGR since 2003 and a 24% net income CAGR since 2009 through 2024.
• Achieved 13% revenue growth for the nine months ended September 30, 2025, reaching $668.3 million.
• Adjusted EBITDA Margin significantly improved to 33% for the nine months ended September 30, 2025, from 26% in the prior year period, indicating strong operational performance.
• Benefits from a globally recognized premium brand, 'Andersen,' which aids in client acquisition and talent recruitment.
• Maintains a low client-facing non-partner attrition rate of approximately 17% over the past three years, compared to an industry average of 21%, reflecting strong talent retention.
• No single client group accounts for more than 1% of revenue, indicating a diversified and resilient client base.
• Approximately 74% of 2024 revenue came from client groups engaged for more than three years, demonstrating strong client retention.
• The company's independence from audit services allows it to offer a comprehensive suite of non-audit services without auditor independence restrictions.
• Strategic relationships through Andersen Global provide access to over 50,000 professionals in 180+ countries, enhancing international service delivery.
• A $9.5 million gain was recognized in Q3 2025 from the reversal of a legal accrual, positively impacting net income.

Negatives

• Net income for the nine months ended September 30, 2025, decreased significantly by 54.5% to $65.7 million, primarily due to $136.5 million in non-cash equity-based compensation.
• Operating income for the nine months ended September 30, 2025, decreased by 54.5% to $64.8 million.
• Cost of services increased by 36% to $467.0 million for the nine months ended September 30, 2025, largely due to non-cash equity-based compensation.
• Sales, general and administrative expenses increased by 34% to $129.7 million for the nine months ended September 30, 2025, also impacted by non-cash equity-based compensation and public company readiness costs.
• Identified material weaknesses in internal control over financial reporting, which require significant remediation efforts and resources.
• The company will incur substantial cash payments under the Tax Receivable Agreement (TRA) and promissory notes (HO Note and CA Notes), which will reduce overall cash flow.
• The dual-class stock structure concentrates voting control with Aggregator, limiting the influence of Class A common stockholders.
• The company is dependent on distributions from AT Umbrella LLC to pay taxes and expenses, including TRA payments, and these distributions may be restricted.

Risks

• Inability to maintain or increase historical revenue growth or profitability in the future.
• Dependence on generating and maintaining client demand, including through adaptation and expansion of services, with potential for significant reduction in demand.
• Inability to effectively manage growth, which could strain key personnel, systems, and resources.
• Failure to successfully integrate or manage future acquisitions, or if acquisitions do not perform to expectations.
• Competitiveness and success depend substantially on the continuing efforts of CEO Mark Vorsatz, senior Managing Directors, and other key personnel.
• Inability to maintain firm culture as the company grows and becomes a public company.
• Failure to maintain reputation and brand could impact ability to attract and retain clients, employees, and future acquisition targets.
• Liability for alleged errors, omissions, illegal practices, or other misconduct in providing services to clients, potentially exceeding available insurance.
• New lines of business or strategic initiatives may fail to generate revenue and result in additional risks.
• Failure to compete effectively could lead to missed business opportunities or loss of existing clients.
• Quarterly fluctuations in operating results and key metrics, making future results difficult to predict.
• Rapid technological changes, including widespread adoption of AI, could significantly impact competitive position, client relationships, and results of operations.
• Legal, reputational, and financial risks relating to cybersecurity incidents or attacks.
• Material weaknesses in internal control over financial reporting, with remediation efforts potentially ineffective or additional weaknesses arising.
• Dependence on distributions from AT Umbrella LLC to pay taxes and expenses, including TRA payments, which may be restricted.
• Payments under the Tax Receivable Agreement may be accelerated and significantly exceed actual tax benefits, potentially impairing change of control transactions.
• The U.S. Internal Revenue Service (IRS) might challenge tax benefits received, leading to TRA payments substantially greater than actual cash tax savings.
• Risk of AT Umbrella LLC becoming a publicly traded partnership for U.S. federal income tax purposes, leading to significant tax inefficiencies.
• No public market currently exists for Class A common stock, and an active public market may not develop.
• Market price of Class A common stock could be volatile, and declines could lead to litigation.
• Broad discretion in the use of IPO net proceeds, which may not be used effectively.
• Future sales and issuances of Class A common stock or rights could result in additional dilution.
• Controlled company status allows reliance on NYSE corporate governance exemptions, potentially reducing stockholder protections.
• If industry or financial analysts do not publish research or issue inaccurate/unfavorable reports, stock price and trading volume could decline.
• Anti-takeover provisions in charter documents and Delaware law could make an acquisition more difficult.
• Exclusive forum provisions could limit stockholders' ability to obtain a favorable judicial forum for disputes.
• No current intention to pay dividends on capital stock, limiting returns to stock value increases.

Future Outlook

The company intends to continue expanding relationships with existing clients, attract new high-quality clients, and broaden service offerings into areas like consulting, investment banking, global mobility, and international legal services. It plans to pursue selective inorganic growth opportunities and further expand internationally by leveraging the Andersen brand and Andersen Global network. Significant investments in technology, infrastructure, and training are also planned. The company expects fourth-quarter 2025 revenue to be lower than the third quarter, consistent with seasonality, and anticipates substantial non-cash charges related to equity-based compensation and equity restructuring in Q4 2025.

Management Comments

• Our mission is to deliver exceptional client service grounded in integrity, transparency, and excellence.
• Building on the rich traditions and culture of the former Arthur Andersen, we are driven by a bold vision to lead in a complex global marketplace, creating lasting value for our clients, our people and our investors.
• Our differentiated approach to client service is rooted in our firm values that emphasize quality of service, collaboration and stewardship.
• We believe our brand is one of the most globally recognized and respected names within professional services.
• Since our inception, we have made a deliberate decision not to provide audit or related financial statement attestation services.
• Our ability to deliver exceptional client service is further bolstered by our membership in Andersen Global.
• Our average Managing Director tenure exceeded ten years, and our average client-facing non-partner attrition rate over the past three years, excluding involuntary terminations, was approximately 17% compared to the industry average of approximately 21%.
• Since our founding, we have never implemented any broad-based layoffs, despite having operated through several periods of significant economic uncertainty.
• Going public isn't about monetization – it's about momentum. With greater access to capital, we can invest more deeply in technology, infrastructure and global integration, broadening our services and creating meaningful opportunities for our people.
• We do not want to be the biggest firm in the world. We want to be the best.

Industry Context

The professional services industry is experiencing growing demand driven by an increasingly complex operating environment, frequent changes in tax policy and legislation (e.g., 2017 Tax Cuts and Jobs Act, OECD global minimum tax), and limited internal organizational capabilities within client companies, exacerbated by a shortage of qualified financial experts like CPAs. There's also a convergence of finance, tax, and legal matters, leading clients to seek integrated solutions. Many larger providers, especially audit firms, face regulatory and independence challenges (e.g., Sarbanes-Oxley Act Section 201) that restrict their ability to offer a full suite of non-audit services. Andersen Group's strategy of not providing audit services positions it to capitalize on this demand for integrated, independent advisory services. The U.S. market opportunity for tax advisory services was $60 billion in 2024, with an additional $44 billion for non-audit financial advisory and valuation services, and $392 billion for consulting services, indicating substantial growth potential for Andersen Group's diversified offerings.

Comparison to Industry Standards

• Andersen Group's average client-facing non-partner attrition rate over the past three years was approximately 17%, which compares favorably to the industry average of approximately 21%.
• In 2024, the company increased average revenue per employee by 9% year-over-year to approximately $335,000, which compares favorably to the industry average of approximately $230,000 in 2024.
• Andersen Global, of which Andersen Tax LLC is a founding member, is one of the largest professional services affiliations globally, with over 50,000 professionals and 3,000 partners operating in over 180 countries as of September 30, 2025, providing a significant competitive footprint compared to traditional multinational consulting firms.
• The company's deliberate decision not to provide audit services differentiates it from 'Big 4' competitors (Deloitte, EY, KPMG, PwC) by avoiding auditor independence rules and restrictions, allowing a broader suite of non-audit services.

Management Changes

Corporate Governance

Legal Proceedings

• A legal matter involving a former employee, for which a $9.4 million loss contingency was accrued as of December 31, 2024, was dismissed on July 29, 2025, resulting in a $9.5 million gain recorded in the nine months ended September 30, 2025.

Related Party Transactions

• Joseph Karczewski's son is employed by Andersen Tax LLC and received compensation of $147,428 in 2024 and $122,108 in 2023.
• A Royalty Agreement with CEO Mark L. Vorsatz (through Name Management LLC) for a percentage of trademark and license fee income was terminated on March 29, 2025. Payments under this agreement were $556,895 in 2024 and $534,226 in 2023.
• Certain current and former Managing Directors (including DePaoli, Karczewski, and Vorsatz as managers) invest in Employee Investment Funds. Andersen Tax LLC previously advanced money to these funds, but will cease doing so post-IPO.
• Andersen Tax LLC provides accounting and administration services for the Employee Funds under an hourly fee arrangement.
• Andersen Group Inc., AT Umbrella LLC, and Aggregator will enter into the AT Umbrella Limited Liability Company Agreement, governing the UP-C structure and economic/governance rights.
• Andersen Group Inc. will enter into a Tax Receivable Agreement with Aggregator, obligating payments to TRA Parties (Class X Umbrella Unit holders) for 85% of certain tax benefits.
• AT Umbrella LLC will issue promissory notes (HO Note for $166.8 million and CA Notes for $189.3 million) to Aggregator in connection with the reorganization transactions.

Stakeholder Impact

• **Shareholders (Class A Common Stock)**: Will incur immediate and substantial dilution. Their ability to influence corporate matters will be limited by the dual-class structure and Aggregator's concentrated voting control. Returns will primarily be limited to increases in stock value, as no dividends are currently expected. They will benefit from 15% of the tax savings under the TRA.
• **Aggregator and its Members (Managing Directors)**: Will retain significant voting control (approximately % post-IPO) through Class B common stock. They will receive 85% of the tax benefits under the Tax Receivable Agreement and payments from the HO Note and CA Notes, providing substantial economic benefits. Their Class X Umbrella Units are redeemable for Class A common stock or cash.
• **Employees/Professionals**: The company emphasizes talent retention through training, development, and a strong culture. New equity incentive plans (2025 Equity Incentive Plan, LTIP Units) are being implemented, but the significant non-cash equity-based compensation expenses may impact reported net income. The company has a history of no broad-based layoffs.
• **Clients**: Expected to benefit from expanded service offerings, continued investment in technology (including AI), and the global reach provided by Andersen Global. The company's independence from audit services is highlighted as a differentiator for client service.
• **Creditors**: Payments under the Tax Receivable Agreement and the HO/CA Notes will be substantial, potentially impacting the company's liquidity and cash flow available for other obligations. TRA payments are subordinate to Senior Obligations (indebtedness for borrowed money).

Next Steps

• Complete the internal reorganization transactions prior to the IPO.
• Finalize the initial public offering (IPO) of Class A common stock and list on the NYSE under the symbol ANDG.
• Remediate identified material weaknesses in internal control over financial reporting, with evaluation and testing potentially extending into 2026.
• Invest net proceeds from the IPO in technology, infrastructure, training, and strategic acquisitions.
• Continue expanding work with existing clients and attract new high-quality clients.
• Expand and add new service offerings, including consulting, investment banking, global mobility, and international legal services.
• Pursue inorganic growth opportunities through selective acquisitions of complementary businesses.
• Further expand business internationally by leveraging the Andersen brand and Andersen Global network.
• Determine and approve CEO's compensation by the full board of directors, based on recommendations from the compensation committee.
• The aggregate principal amount of the CA Notes is subject to a true-up mechanism following the issuance of these notes to reflect the final calculation of the amount of the related Member Notes, which must be determined on or before December 31, 2025.

Key Dates

Recommendation

Andersen Group Inc. presents a compelling growth story with a strong brand, diversified service offerings, and a robust global network. The company's historical revenue and Adjusted EBITDA growth are impressive, and its unique position as a non-audit firm provides a competitive advantage. However, the significant decline in GAAP net income for the most recent period, driven by substantial non-cash equity-based compensation, warrants caution. The identified material weaknesses in internal controls, along with the complex UP-C structure and the substantial, long-term payment obligations under the Tax Receivable Agreement and promissory notes, introduce considerable financial and operational risks. While the IPO provides access to capital for future growth, investors should 'hold' to monitor the effective remediation of internal control weaknesses, the impact of the large non-cash expenses on future GAAP profitability, and the company's ability to manage its significant tax-related liabilities without unduly impacting liquidity. The long-term potential is strong, but the near-term complexities require careful observation before a 'buy' recommendation.

Keywords

Tax Advisory, Valuation Services, Financial Advisory, SEC Filing, IPO, Professional Services, Andersen Global, UP-C Structure, Tax Receivable Agreement, Corporate Governance, Risk Management, Financial Reporting, Growth Strategy, Client Services, Artificial Intelligence, Cybersecurity, Internal Controls, Capital Markets