Understanding the Key Advisors in a Sell-Side Investment Banking Process

By John Rogers, on August 14th, 2025

A sell-side investment banking mandate involves guiding a company through the process of selling all or part of its business. This complex transaction requires a coordinated effort among various advisors, each bringing specialized expertise to ensure the deal is executed efficiently, legally, and in alignment with the seller’s goals. Below is an overview of the key advisors typically involved in a sell-side mandate and the roles they play.

Investment Bankers
Role: Lead Advisor and Deal Manager

  • Investment bankers are the central figures in a sell-side mandate. They are responsible for managing the overall transaction process, from initial preparation to closing. Their key responsibilities include:
    • Valuation and strategic advice: Assessing the value of the business and advising on timing and structure.
    • Marketing the deal: Preparing marketing materials such as the Confidential Information Memorandum (CIM) and identifying potential buyers.
    • Running the process: Managing the auction or negotiated sale process, coordinating due diligence, and facilitating buyer interactions.
    • Negotiation and closing: Assisting in deal structuring, negotiating terms, and supporting the final closing process.
  • Investment bankers act as the quarterback of the transaction, ensuring all parties are aligned and that the seller’s objectives are met.

Legal Advisors
Role: Legal Structuring and Risk Mitigation

  • Legal counsel plays a critical role in protecting the seller’s interests throughout the transaction. Their responsibilities include:
    • Drafting and reviewing documents: Including purchase agreements and other legal contracts.
    • Regulatory compliance: Ensuring the transaction complies with relevant laws and regulations.
    • Negotiation support: Advising on legal terms and conditions, representations and warranties, indemnities, and other risk-related provisions.
    • Closing logistics: Managing legal aspects of the closing process, including filings and documentation.
  • Legal advisors are essential for minimizing legal exposure and ensuring the transaction is enforceable and compliant.

Accounting and Tax Advisors
Role: Financial Diligence and Tax Structuring

  • Accounting and tax advisors provide critical insights into the financial health of the business and help optimize the transaction from a tax perspective. Their roles include:
    • Due diligence: Preparing quality of earnings reports, normalizing financials, and identifying potential red flags.
    • Tax structuring: Advising on the most tax-efficient deal structure, whether asset sale, stock sale, or merger.
    • Working capital analysis: Assisting in defining working capital targets and mechanisms for post-close adjustments.
    • Support during buyer diligence: Responding to buyer inquiries and helping explain financial metrics.
  • Their input ensures that the seller is well-prepared for buyer scrutiny and that the deal is structured to minimize tax liabilities.

Management Consultants or Strategic Advisors
Role: Operational and Strategic Positioning

  • In some cases, especially with complex businesses or turnaround situations, management consultants or strategic advisors may be engaged to:
    • Refine the business strategy: Position the company more attractively to buyers.
    • Operational improvements: Implement changes that enhance EBITDA or reduce risk prior to sale.
    • Market analysis: Provide insights into industry trends and competitive positioning.
  • These advisors help improve the company’s appeal to potential acquirers prior to sale.

Wealth Advisors or Personal Financial Planners
Role: Post-Transaction Planning

  • For closely held businesses or family-owned enterprises, personal wealth advisors may be involved in helping owners plan for life after the sale. Their contributions include:
    • Estate planning: Structuring ownership and proceeds to align with estate goals.
    • Investment planning: Advising on how to manage and invest sale proceeds.
    • Tax planning: Coordinating with tax advisors to minimize personal tax impact.
  • While not directly involved in the transaction, their role is crucial for ensuring the seller’s long-term financial well-being.

Industry Experts or Technical Advisors
Role: Specialized Due Diligence and Validation

  • In niche sectors, technical advisors may be brought in to validate specific aspects of the business, such as:
    • Intellectual property (IP) audits
    • Environmental assessments
    • Technology evaluations
  • These experts provide credibility and assurance to buyers, especially in highly technical or regulated industries.

A successful sell-side investment banking mandate is a multidisciplinary effort. Each advisor plays a distinct and vital role, from shaping the strategic narrative to ensuring legal and financial integrity. The investment banker orchestrates the process, but the combined expertise of legal, accounting, tax, strategic, and personal advisors ensures that the transaction is not only completed but optimized for the seller’s goals. Engaging the right team early and fostering collaboration among them is key to maximizing value and minimizing risk in any sale process.

At The Bonadio Group, our breadth of knowledge across multiple disciplines sets us apart in the sell-side advisory landscape. We bring together experts in accounting, investment banking, tax, transaction advisory, and IT diligence (where appropriate) to deliver a truly comprehensive approach. What makes our investment banking team unique is that we grew up in assurance, giving us a deep, analytical understanding of the financial dynamics behind each transaction. In addition to our audit backgrounds, we bring hands-on experience in transaction advisory and can seamlessly leverage the firm’s M&A tax expertise and IT diligence specialists. This integrated model ensures our clients benefit from end-to-end support, insightful analysis, and strategic execution throughout the entire sell-side process.

If you need further guidance or have any questions on this topic, we are here to help. Please do not hesitate to reach out to discuss your specific situation.

This material has been prepared for general, informational purposes only and is not intended to provide, and should not be relied on for, tax, legal or accounting advice. Should you require any such advice, please contact us directly. The information contained herein does not create, and your review or use of the information does not constitute, an accountant-client relationship.

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Written By

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John Rogers
Consulting Manager