RSM
RSM is a global accounting and advisory network focused strongly on middle-market clients, with a well-developed financial due diligence and transaction advisory offering.
- Highest 2026 tier: Tier II
- Financial due diligence advisory firm
- Financial Due Diligence (FDD) Advisory
Overview
RSM is a global accounting and advisory network focused strongly on middle-market clients, with a well-developed financial due diligence and transaction advisory offering. The firm supports private equity sponsors, corporate acquirers, sellers, and lenders in evaluating financial performance, transaction risks, working capital, deal value, and investment assumptions.
Its financial due diligence strength lies in middle-market responsiveness, sector knowledge, and cross-border coordination through its international network. RSM is especially relevant for clients that need professional diligence capability, practical transaction support, and local market knowledge across multiple jurisdictions.
RSM is included in one 2026 Advisory Ranking category. The highest recorded classification is Tier II.
Firm facts
| Founded | 1964 |
| Firm type | Financial due diligence advisory firm |
| Headquarters | London, United Kingdom |
| Primary focus | Transaction financial analysis and deal-accounting diligence |
| Highest 2026 Advisory Ranking tier | Tier II |
Principal activities
Quality of earnings
Earnings normalization, working-capital analysis and cash-flow review.
Transaction diligence
Buy-side and sell-side financial diligence and deal-risk assessment.
Deal accounting
Purchase-agreement support, carve-out analysis and post-deal financial matters.
RSM works with clients on assignments that may combine strategy, specialist analysis, implementation support and organizational adoption. The precise scope depends on the mandate, sector, geography and client requirements.
Sector and mandate coverage
Sector coverage
- Private equity
- Industrials
- Technology
- Healthcare
- Consumer markets
- Business services
Mandate types
- Buy-side diligence
- Sell-side diligence
- Quality of earnings
- Working capital
- Carve-out diligence
- Deal accounting
Market position
RSM is positioned as a financial due diligence advisory firm. Its relevance reflects the combination of specialist capability, institutional experience and practical involvement in consequential strategic or corporate decisions.
Distinctive focus: Its financial due diligence strength lies in middle-market responsiveness, sector knowledge, and cross-border coordination through its international network.
Competitive context
RSM competes with specialist strategy advisers, executive-services firms, transaction advisers, analytics providers and larger multidisciplinary professional-services firms. The relevant peer set varies by mandate, industry, client segment, geographic scope and delivery model.
Comparable firms are selected according to overlap in business model, client segment, service coverage, geographic activity and mandate profile. Inclusion does not imply equivalence in scale, ranking or market position.
Leadership
| Person | Current position | Institutional background |
|---|
Leadership information reflects the public sources reviewed for this profile. View the firm’s website ↗
Corporate and regulatory information
RSM provides advisory, executive, analytical, transaction, managed or technology services. The contracting entity, professional obligations and regulatory status depend on the service, client jurisdiction and engagement scope.
View registered-entity details
| Service status | Advisory, executive, analytical, transaction or technology services |
| Headquarters | London, United Kingdom |
Principal offices
- London, United Kingdom
Rankings and recognition
Ranking inclusion is editorially determined. The existence or maintenance of a Wiki profile does not influence ranking eligibility, tier or position.
Related Economy analysis
Selected Economy Markets articles providing context for the firm’s advisory environment:
- The Silent Reshuffle of the Advisory Market
- How AI Is Reshaping the Consulting Industry in 2026
- Middle-Market Private Equity: Returns, Scale and Manager Selection
Related institutions and subjects
Sources and data transparency
The profile is based on the following publicly available institutional, regulatory and editorial sources:
- RSM — official firm overview and service information.
- Advisory Ranking — Top 30 Financial Due Diligence (FDD) Advisory 2026 — inclusion and tier classification.
