Top 20 Investigations & Forensic Advisory 2026

This report forms part of the Ranking News Advisory series, which evaluates specialized advisory firms across global corporate, financial, and regulatory ecosystems.

Investigations and forensic advisory firms have become critical participants within the modern corporate risk and governance environment as organizations face increasing exposure to financial misconduct, regulatory scrutiny, and cross-border operational complexity. These firms operate at the intersection of finance, law, and intelligence, supporting corporations, financial institutions, and legal advisors in navigating high-stakes situations involving fraud, corruption, accounting irregularities, and internal disputes.

Unlike traditional audit or consulting functions, investigations and forensic advisory engagements are typically event-driven, requiring rapid deployment, discretion, and the ability to reconstruct complex financial and operational narratives under legal and reputational constraints. Firms in this category frequently work alongside law firms, regulators, and boards of directors, providing independent analysis and evidentiary support across litigation, arbitration, and enforcement contexts.

As global business operations become increasingly interconnected, the demand for credible, independent investigative capabilities continues to grow. Organizations now rely on these firms not only in response to crises, but also as part of proactive risk management, transaction due diligence, and governance frameworks.

This ranking identifies investigations and forensic advisory firms whose platforms demonstrate sustained relevance across complex, high-impact engagements rather than focusing solely on firm size or scale.

Market Overview

The investigations and forensic advisory sector continues to expand as regulatory enforcement intensifies and corporate stakeholders place greater emphasis on governance, transparency, and accountability. Companies operating across multiple jurisdictions face heightened exposure to anti-corruption laws, financial crime regulations, and disclosure requirements, driving demand for specialized investigative expertise.

Firms in this category often act as independent advisors in situations where objectivity and credibility are essential. Their work spans internal misconduct investigations, whistleblower allegations, financial restatements, asset tracing, and post-transaction disputes. In many cases, investigative findings directly inform legal strategy, regulatory engagement, and board-level decision-making.

The market remains highly concentrated among globally recognized advisory platforms with multidisciplinary capabilities, while a number of specialist firms continue to differentiate through deep expertise in forensic accounting, dispute support, and complex fraud analysis.

As corporate risk environments evolve, investigations and forensic advisory firms increasingly serve as long-term partners in risk identification, remediation, and governance improvement.

Industry Trend — 2026

The investigations and forensic advisory landscape in 2026 reflects a continued shift toward proactive risk management and integrated advisory models. Organizations are increasingly embedding forensic capabilities into broader governance, compliance, and transaction processes rather than relying solely on reactive investigations.

Regulatory environments remain a key driver of demand, particularly in areas related to financial crime, sanctions enforcement, and cross-border compliance. Firms with the ability to navigate multi-jurisdictional regulatory frameworks and coordinate with legal counsel across regions are particularly well positioned.

Technological capabilities have also become central to investigative work. Data analytics, digital forensics, and AI-assisted document review are now standard components of large-scale investigations, enabling firms to process complex datasets and identify patterns of misconduct more efficiently.

At the same time, reputational considerations have elevated the importance of discretion, independence, and credibility. Clients increasingly prioritize firms with established track records in sensitive, high-profile matters where outcomes may influence regulatory action, litigation strategy, and stakeholder confidence.

Methodology — Core Eligibility Criteria

To ensure structural consistency within the category, firms considered for this ranking were evaluated based on the following eligibility conditions:

• Maintains dedicated investigations and/or forensic advisory capabilities
• Demonstrates experience in complex financial or corporate investigations
• Supports legal, regulatory, or dispute-related engagements
• Operates across multiple jurisdictions or in cross-border contexts
• Recognized by legal, financial, or corporate stakeholders

Organizations focused solely on audit, traditional consulting, or product-based services without independent investigative capability are generally excluded.

Methodology — Ranking Factors

Firms included in the ranking were evaluated using a combination of qualitative and structural considerations. Key factors considered include:

• Depth of investigative and forensic accounting capabilities
• Experience in high-stakes or complex engagements
• Global reach and cross-border execution capability
• Reputation among law firms, regulators, and corporate clients
• Integration with legal, compliance, and transaction processes
• Organizational independence and credibility

The objective of the ranking is to identify firms whose advisory platforms maintain sustained relevance within the global investigations and forensic ecosystem.

The ranking universe consisted of approximately 70–90 advisory firms globally, from which 20 institutions were selected for inclusion.

Tier classifications reflect relative institutional positioning within the investigations and forensic advisory segment and do not represent performance rankings or legal opinions.

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Tier I — Leading Investigations & Forensic Advisory Firms

Kroll

• Headquarters: New York, United States
• Founded: 1972 legacy

Kroll is one of the most established global names in corporate investigations, forensic advisory, risk consulting, valuation, restructuring, and complex dispute support. Its investigations platform is especially relevant for matters involving fraud, misconduct, asset tracing, sanctions, corruption, cyber incidents, regulatory scrutiny, and cross-border corporate risk.

The firm’s value in this category lies in its ability to combine investigative expertise with forensic accounting, data analytics, cyber capabilities, restructuring knowledge, and dispute support. Many high-stakes investigations require more than fact-finding; they require defensible evidence, financial reconstruction, regulatory awareness, and practical recommendations for boards, legal counsel, and executive leadership.

Kroll was included in Tier I in recognition of its category-defining role in investigations and forensic advisory, its global platform, and its relevance to complex corporate, regulatory, financial, and dispute-related matters.

FTI Consulting

• Headquarters: Washington, D.C., United States
• Founded: 1982

FTI Consulting is a global expert-services and advisory firm with a major forensic and litigation consulting platform. Its investigations work spans forensic accounting, fraud investigations, monitorships, regulatory matters, data analytics, business intelligence, litigation support, and complex corporate disputes.

The firm is particularly relevant where investigations intersect with litigation, arbitration, regulatory enforcement, restructuring, or shareholder disputes. Its forensic teams support internal investigations, quantify financial effects, analyze misconduct, reconstruct records, and provide expert testimony in contentious matters.

FTI Consulting was included in Tier I in recognition of its scale, forensic investigations capability, litigation consulting depth, and relevance to complex corporate, regulatory, and dispute-driven investigations.

Deloitte — Forensic / Investigations

• Headquarters: London, United Kingdom
• Founded: 1845

Deloitte’s forensic and investigations practice supports organizations facing fraud, corruption, corporate misconduct, financial crime, regulatory scrutiny, litigation, discovery, and other high-stakes business risks. The firm brings together forensic accounting, investigative analytics, anti-fraud advisory, financial crime expertise, e-discovery, litigation support, and remediation capabilities.

Its relevance lies in the ability to support complex investigations across jurisdictions, data environments, accounting records, governance systems, and regulatory expectations. Deloitte’s forensic platform is especially useful where internal investigations, misconduct allegations, anti-corruption reviews, evidence preservation, transaction testing, and control remediation must be coordinated within a broader professional-services environment.

Deloitte was included in Tier I in recognition of its global forensic advisory platform, corporate investigations capability, technical accounting depth, data and discovery resources, and relevance to major investigations involving fraud, misconduct, financial crime, and regulatory risk.

Control Risks

• Headquarters: London, United Kingdom
• Founded: 1975

Control Risks is a global risk consultancy with deep capabilities in investigations, forensic services, political risk, security advisory, compliance, business intelligence, and crisis response. It is particularly relevant for cross-border matters involving corruption, political exposure, whistleblower complaints, fraud, security risk, challenging jurisdictions, and complex stakeholder environments.

The firm’s strength lies in intelligence-led investigation. While accounting-led forensic firms are often strongest in financial reconstruction, Control Risks is especially useful where information access, human-source networks, local context, geopolitical exposure, and operational security shape the investigation. This makes it valuable in emerging markets, sensitive disputes, and multinational corporate matters.

Control Risks was included in Tier I in recognition of its global footprint, intelligence-led advisory model, investigations heritage, and distinctive role in complex cross-border investigative advisory.

Ankura

• Headquarters: New York, United States
• Founded: 2014

Ankura is a global advisory and expert-services firm with a strong platform across forensics, investigations, risk, compliance, disputes, data, technology, and restructuring. Since its founding, the firm has expanded through specialized practices and senior professionals from legal, regulatory, accounting, and consulting backgrounds.

Its investigations and forensic advisory work is relevant across fraud, anti-corruption, financial crime, accounting irregularities, monitorships, compliance reviews, data analysis, and dispute-related investigations. Ankura is especially useful where clients need multidisciplinary teams that can combine legal sensitivity, forensic detail, technology tools, data analysis, and practical remediation support.

Ankura was included in Tier I in recognition of its independent advisory platform, forensic and investigations capability, multidisciplinary model, and relevance to complex corporate, regulatory, compliance, and dispute-related investigations.

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Tier II — Established Investigations & Forensic Advisory Firms

(Alphabetical order)

AlixPartners — Investigations, Disputes & Advisory Services

• Headquarters: New York, United States
• Founded: 1981

AlixPartners is a global consulting and financial advisory firm with investigations, disputes, risk, forensic accounting, regulatory, and advisory capabilities. Its investigations work supports clients in matters involving accounting and reporting concerns, anti-money laundering, asset diversion, FCPA issues, trading practices, price fixing, whistleblower complaints, and other complex risk situations.

The firm is relevant to investigations and forensic advisory because it combines forensic accounting, regulatory experience, economic analysis, technology capabilities, and operational advisory. This makes AlixPartners especially useful in matters where investigative findings must be interpreted alongside financial performance, governance issues, litigation exposure, regulatory risk, or business remediation.

AlixPartners was included in Tier II in recognition of its investigations and disputes capability, forensic accounting expertise, regulatory-risk experience, and relevance to complex corporate and financial investigations.

Alvarez & Marsal

• Headquarters: New York, United States
• Founded: 1983

Alvarez & Marsal is a global advisory firm with strong capabilities in disputes, investigations, restructuring, regulatory advisory, financial crime, forensic technology, and expert testimony. Its investigations work is especially relevant in complex corporate situations where forensic analysis overlaps with financial distress, operational disruption, governance failure, or litigation risk.

The firm’s differentiation comes from its restructuring and performance-improvement background. In many matters, investigations are not isolated legal exercises; they are connected to liquidity crises, management failures, fraud allegations, creditor disputes, or post-transaction disagreements. A&M’s ability to connect forensic findings with operational and financial remediation gives it a strong role in high-pressure situations.

Alvarez & Marsal was included in Tier II in recognition of its forensic advisory capability, restructuring-linked investigations experience, dispute-support work, and relevance to complex matters where investigations, remediation, liquidity, and stakeholder pressure intersect.

Berkeley Research Group (BRG)

• Headquarters: Emeryville, United States
• Founded: 2010

Berkeley Research Group is a global consulting firm focused on economics, disputes, investigations, corporate finance, and performance improvement. Its forensic and investigations capabilities are particularly relevant in matters involving financial analysis, accounting issues, regulatory disputes, damages, expert testimony, and complex commercial litigation.

BRG’s strength lies in combining economic, financial, and analytical expertise. In investigations and disputes, clients often need not only factual findings but also rigorous quantification, event reconstruction, damages analysis, and expert opinions that can withstand scrutiny. BRG’s broader dispute and expert-services platform supports this need.

BRG was included in Tier II in recognition of its forensic financial analysis capability, investigations-related dispute support, expert-services platform, and relevance to complex financial and regulatory matters.

Forensic Risk Alliance (FRA)

• Headquarters: London, United Kingdom
• Founded: 1999

Forensic Risk Alliance is a specialist forensic accounting, data governance, compliance, and investigations consultancy. The firm is frequently involved in cross-border corruption matters, regulatory investigations, financial crime reviews, compliance monitorships, disputes, arbitration support, and complex data analysis.

FRA is especially relevant because it combines forensic accounting with data-heavy investigation support. Modern investigations often involve large document populations, complex transaction histories, multiple jurisdictions, and regulators requiring defensible analysis. FRA’s specialist orientation gives it credibility in those environments.

Forensic Risk Alliance was included in Tier II in recognition of its forensic accounting specialization, cross-border investigations experience, regulatory-matter capability, and relevance to high-stakes compliance and financial crime reviews.

K2 Integrity

• Headquarters: New York, United States
• Founded: 2009

K2 Integrity is a risk, compliance, investigations, and monitoring firm with particular strength in financial crime, sanctions, anti-money laundering, regulatory compliance, monitorships, and complex investigations. The firm combines investigative heritage with financial integrity and compliance expertise.

Its relevance is strongest in financial institutions, regulated industries, cross-border enforcement matters, sanctions risk, anti-bribery and corruption reviews, and situations where investigative findings must be aligned with regulatory expectations. K2 Integrity is especially useful where investigations, compliance remediation, financial crime controls, and monitorship obligations overlap.

K2 Integrity was included in Tier II in recognition of its specialist financial-integrity platform, investigations and monitoring capability, regulatory-risk focus, and relevance to financial crime and compliance-linked investigations.

Mintz Group

• Headquarters: New York, United States
• Founded: 1994

Mintz Group is a global investigations and enterprise risk firm focused on due diligence, litigation support, fraud investigations, asset tracing, background investigations, and complex cross-border inquiries. The firm serves law firms, corporations, investors, financial institutions, international organizations, and non-profits.

The firm’s strength lies in investigative research, source development, public-records analysis, due diligence, and litigation-related fact gathering. It is especially relevant in matters where clients need to understand counterparties, management teams, hidden assets, reputational exposure, or cross-border business risks.

Mintz Group was included in Tier II in recognition of its specialist investigations platform, corporate intelligence work, asset-tracing capability, due diligence practice, and relevance to litigation-support and cross-border investigative matters.

Nardello & Co.

• Headquarters: New York, United States
• Founded: 2003

Nardello & Co. is a global investigations firm focused on corporate investigations, anti-corruption matters, asset tracing, due diligence, litigation support, internal investigations, reputational risk, and complex disputes. Its team includes professionals with backgrounds in prosecution, law enforcement, intelligence, journalism, financial crime, and forensic analysis.

The firm is especially relevant for sensitive matters requiring discretion, judgment, and human-source investigation. While accounting-led firms may dominate financial reconstruction, Nardello is strong in intelligence-led corporate investigations, witness development, cross-border fact-finding, and reputationally sensitive mandates.

Nardello & Co. was included in Tier II in recognition of its specialist investigations identity, corporate intelligence capability, cross-border work, and relevance to sensitive corporate and dispute-related investigative mandates.

Province / StoneTurn

• Headquarters: Las Vegas / Boston legacy presence, United States
• Founded: Province founded 2008; StoneTurn founded 2004

Province / StoneTurn represents a combined advisory platform bringing together restructuring, financial advisory, disputes, investigations, risk advisory, compliance, forensic accounting, and litigation support. The combined profile is relevant where investigative work intersects with financial distress, restructuring, disputes, compliance failures, or operational remediation.

The platform is especially relevant where investigations require both forensic credibility and practical advisory support. StoneTurn’s legacy strengths in investigations, compliance, economics, technology, cybersecurity, and litigation advisory complement Province’s restructuring and financial advisory orientation.

Province / StoneTurn was included in Tier II in recognition of its forensic investigations and compliance capability, dispute-support work, restructuring-adjacent advisory profile, and relevance to complex situations where investigative findings must be interpreted alongside business, liquidity, and stakeholder pressures.

Secretariat Advisors

• Headquarters: Atlanta, United States
• Founded: 2008

Secretariat is a global expert-services and litigation consulting firm with capabilities in forensic accounting, disputes, investigations, arbitration, economic damages, construction, infrastructure, government contracts, and expert testimony. Its forensic accounting work includes fraud, financial misconduct, asset tracing, and complex financial-data analysis.

The firm is particularly relevant where forensic advisory supports litigation, arbitration, and expert evidence. Many investigations eventually become disputes over damages, responsibility, valuation, contract performance, or regulatory exposure. Secretariat’s expert-services orientation makes it useful in these settings.

Secretariat Advisors was included in Tier II in recognition of its forensic accounting capability, expert-services platform, disputes orientation, and relevance to investigations that require financial analysis, evidence development, and expert testimony.

Stout

• Headquarters: Chicago, United States
• Founded: 1991

Stout is an independent advisory firm with capabilities across disputes, claims, investigations, valuation, investment banking, transaction advisory, and specialty financial advisory. Its disputes, claims, and investigations group supports forensic investigations, regulatory proceedings, internal investigations, litigation, and complex financial-transaction analysis.

The firm is especially relevant where investigations require accounting, valuation, finance, digital forensics, damages analysis, or expert testimony. Its professionals support matters involving complex financial transactions, misconduct analysis, loss quantification, and legal-team support in contentious matters.

Stout was included in Tier II in recognition of its independent advisory platform, disputes and investigations capability, forensic financial analysis, and relevance to complex financial and litigation-linked investigations.

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Tier III — Specialist Investigations & Forensic Advisory Firms

(Alphabetical order)

Guidepost Solutions

• Headquarters: New York, United States
• Founded: 2010

Guidepost Solutions is an investigations, compliance, monitoring, security, and technology consulting firm. It supports domestic and international investigations, compliance reviews, monitorships, workplace investigations, security advisory, fraud examinations, due diligence, and sensitive corporate matters.

The firm is particularly relevant where organizations require independent investigation, compliance program review, monitoring, or remediation support following allegations, regulatory scrutiny, governance failures, or reputational concerns. Its multidisciplinary model gives it a practical role in matters where investigation, oversight, compliance, and institutional risk intersect.

Guidepost Solutions was included in Tier III in recognition of its investigations and compliance platform, monitoring capability, fraud-examination work, and relevance to sensitive corporate and institutional risk matters.

RSM Italy — Forensic Investigations & Intelligence

• Headquarters: Milan, Italy
• Founded: RSM Italy platform date back to 1960s; current structure in 2015; Forensic Investigations & Intelligence business line expanded in 2024

RSM Italy’s Forensic Investigations & Intelligence business line provides forensic investigation, corporate intelligence, and investigative advisory services for law firms, investors, companies, and other institutional clients. The practice supports matters involving regulatory risk, internal investigations, business intelligence, forensic accounting, corporate intelligence, and complex fact-finding assignments.

The firm is relevant to investigations and forensic advisory because its work sits at the intersection of evidence gathering, investigative research, financial analysis, corporate risk assessment, and dispute-related support. Its position within RSM Italy gives the practice access to a wider professional-services platform while maintaining a specialist focus on forensic investigations, intelligence work, and investigative advisory.

RSM Italy — Forensic Investigations & Intelligence was included in Tier III in recognition of its specialist investigative advisory capability, corporate intelligence focus, forensic and dispute-support work, and relevance to clients requiring structured analysis of legal, financial, regulatory, and reputational risk.

S-RM

• Headquarters: London, United Kingdom
• Founded: 2005

S-RM is a global corporate intelligence and cyber security consultancy focused on intelligence, resilience, cyber response, crisis management, and investigative support. Its work is relevant to transactions, disputes, cyber incidents, reputational risk, and complex corporate decision-making.

The firm is particularly relevant where investigations involve cyber-enabled risk, digital evidence, reputational exposure, sanctions concerns, geopolitical sensitivity, or crisis-response needs. Modern investigations increasingly require the ability to connect intelligence, cyber, risk, and stakeholder analysis.

S-RM was included in Tier III in recognition of its corporate intelligence and cyber-enabled investigations profile, crisis-response capability, and relevance to modern investigative matters where digital, reputational, and geopolitical risks overlap.

The Risk Advisory Group

• Headquarters: London, United Kingdom
• Founded: 1997

The Risk Advisory Group is an independent global business intelligence and investigations firm serving law firms, investors, corporations, and institutions. Its work includes due diligence, disputes and investigations, commercial intelligence, asset tracing, political risk, and strategic risk advisory.

The firm is especially relevant where clients need evidence-led intelligence on counterparties, transactions, disputes, assets, political exposure, or reputational risk. Its independence and specialist focus make it well suited to sensitive matters where discreet investigative research and cross-border intelligence are required.

The Risk Advisory Group was included in Tier III in recognition of its business intelligence and investigations focus, asset-tracing capability, political-risk awareness, and relevance to cross-border investigative advisory.

Veracity Worldwide

• Headquarters: New York, United States
• Founded: 2007

Veracity Worldwide is a strategic intelligence and advisory firm focused on political risk, reputational risk, corruption risk, energy security, critical minerals, advanced technologies, and challenging-market intelligence. Its work supports executives, investors, and organizations facing sensitive geopolitical, regulatory, and reputational questions.

The firm is not a broad forensic accounting platform, but it provides high-value investigative intelligence in markets where corruption, politics, reputation, strategic risk, and sector exposure overlap. Its work is especially relevant for transactions, market entry, disputes, stakeholder assessment, and geopolitical risk analysis.

Veracity Worldwide was included in Tier III in recognition of its differentiated geopolitical and sector-focused intelligence profile, corruption-risk work, and relevance to investigations involving strategic, reputational, and cross-border market risk.

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Remarks

Investigations and forensic advisory firms continue to play a central role in the evolving corporate risk landscape as organizations navigate increasingly complex regulatory, financial, and operational environments. The demand for independent, credible analysis in situations involving misconduct, disputes, and governance challenges remains structurally strong.

Firms in this ranking reflect a combination of global scale, technical expertise, and the ability to operate effectively in high-pressure, high-stakes engagements. As investigative work becomes more integrated with compliance, transaction, and strategic advisory functions, these organizations are expected to maintain long-term relevance within the broader advisory ecosystem.

Tier classification reflects relative institutional positioning within the investigations and forensic advisory sector rather than performance outcomes or legal determinations.

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Recognition

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