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Walk Me Through an M&A Deal Process: Complete Guide

Understand the full M&A deal process from start to finish. Learn about sell-side vs buy-side, key phases, and common interview questions.

November 26, 2025
Updated: Dec 31, 2025
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Understanding the M&A process is essential for IB interviews. You need to know what happens at each stage, who's involved, and what the key work products are.

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Sell-Side vs. Buy-Side

Role Comparison

TermDefinitionNote
Sell-Side AdvisorRepresents the company being soldRuns the process
Buy-Side AdvisorRepresents potential acquirersHelps with bidding
Sell-Side WorkCIM, process management, negotiationsMore predictable
Buy-Side WorkDue diligence, valuation, deal structuringMore variable

Most IB M&A work is sell-side, where you're running a competitive auction process. This guide focuses on sell-side.

Phase 1: Preparation (Weeks 1-4)

Key Activities

  • Kick-off meeting with client management
  • Due diligence on the target (your client)
  • Build financial model and valuation
  • Prepare Confidential Information Memorandum (CIM)
  • Create teaser (anonymous summary)
  • Develop buyer list

Key Documents

Preparation Documents

TermDefinitionNote
Teaser1-2 page anonymous summaryNo company name
CIM50-100 page detailed info packageCompany name revealed
Financial ModelHistorical and projected financialsSupports valuation
Buyer ListStrategic and financial buyers50-200 names typically

Phase 2: Marketing (Weeks 5-8)

Key Activities

  • Contact potential buyers
  • Send teasers to gauge interest
  • Execute NDAs (Non-Disclosure Agreements)
  • Distribute CIM to signed NDAs
  • Field questions from interested parties
  • Set up virtual data room (VDR)

The goal is to generate competitive tension. More interested buyers = better pricing for seller.

Test Yourself
Medium

In a typical sell-side M&A auction, approximately how many potential buyers receive the CIM, and how many make it to final bids?

Phase 3: First Round Bids (Weeks 9-12)

Key Activities

  • Receive initial indications of interest (IOIs)
  • IOIs include preliminary value range and structure
  • Evaluate bids on price, certainty, and strategic fit
  • Select buyers to advance to next round
  • Typically narrow from 20+ to 5-8 bidders

What IOIs Typically Include

  • Preliminary valuation range
  • Form of consideration (cash/stock/mix)
  • Financing sources (committed vs. subject to)
  • Key due diligence items
  • Proposed timeline
Test Yourself
Medium

During an M&A auction, what is the PRIMARY difference between an IOI and a final bid (LOI)?

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Phase 4: Management Presentations (Weeks 13-16)

Key Activities

  • Schedule management presentations with selected bidders
  • Management team presents to potential buyers
  • Q&A sessions on strategy, financials, operations
  • Open data room for detailed due diligence
  • Facilitate site visits if relevant

This is where buyers really dig in. They're evaluating both the business AND the management team.

Phase 5: Final Bids (Weeks 17-20)

Key Activities

  • Receive final (binding) bids
  • Final bids include markup of purchase agreement
  • Compare bids on price, terms, and certainty
  • Negotiate with top bidders
  • Select winning bidder

What Final Bids Include

  • Firm purchase price
  • Definitive financing commitments
  • Markup of purchase agreement
  • Remaining diligence items (should be minimal)
  • Timeline to signing and closing

Phase 6: Signing & Closing (Weeks 21-24+)

Key Activities

  • Negotiate and finalize purchase agreement
  • Sign definitive agreement
  • Announce transaction (if public)
  • Satisfy closing conditions (regulatory, financing)
  • Close transaction and transfer ownership
Test Yourself
Hard

A seller has ONE clear strategic acquirer who has approached them directly with a strong offer. What is the BEST advice for the seller?

Full Timeline Summary

M&A Process Timeline

TermDefinitionNote
Preparation4-6 weeksCIM, model, buyer list
Marketing4-6 weeksContact buyers, NDAs
First Round4-6 weeksIOIs, narrow the field
Mgmt Presentations4-6 weeksDue diligence
Final Bids4-6 weeksBinding offers
Signing to Closing4-12 weeksRegulatory

Total timeline: Typically 6-12 months for a full auction process. Negotiated deals (bilateral) can be faster.

Key Takeaways

Key Takeaway

  1. 6 phases: Preparation, Marketing, First Round, Management Presentations, Final Bids, Signing/Closing
  2. Timeline: 6-12 months for full auction
  3. Goal: Create competitive tension to maximize value
  4. Key documents: Teaser, CIM, IOI, LOI, Purchase Agreement
  5. Narrow progressively: 50+ → 30 CIMs → 10 IOIs → 3 final bids → 1 winner

M&A process questions are common in IB interviews. Practice explaining each phase with confidence.

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