If you want to work in investment banking, understanding the M&A deal process is non-negotiable. Whether you’re preparing for interviews, networking with bankers, or just trying to understand what analysts actually do day-to-day, knowing how a merger or acquisition moves from idea to close is foundational knowledge. In this post, we’ll walk through the entire M&A process — from the initial mandate through signing and closing — so you can speak to it with confidence in any recruiting conversation.
Step 1: Origination and the Mandate
Every M&A deal starts with origination — the process by which a bank wins the right to advise on a transaction. Senior bankers (Managing Directors and Vice Presidents) spend the majority of their time cultivating relationships with CFOs, CEOs, and board members at potential client companies. When a company decides it wants to explore a sale, an acquisition, or a merger, it typically invites several investment banks to pitch for the advisory mandate.
This pitch — often called a “bake-off” or “beauty contest” — involves the bank presenting its credentials, its view of the deal landscape, a preliminary valuation of the company, and a proposed deal strategy. The company selects one or more advisors and signs an engagement letter that outlines the scope of work and the fee structure (typically a retainer plus a success fee that triggers at close).
For analysts and associates, the mandate stage often means working late nights building “pitch books” — presentation decks full of market analysis, comparable transactions, and valuation work. It’s unglamorous but critical, and it’s where many junior bankers first learn the M&A toolkit.
Step 2: Preparation — Valuation, Materials, and Internal Alignment
Once the bank has the mandate, the real work begins. Before any outreach to buyers or before a company can run a sale process, the deal team needs to develop a thorough understanding of the business.
Building the Valuation
The bank’s analysts and associates build out a full valuation package, which typically includes:
- DCF (Discounted Cash Flow) Analysis — projecting the company’s free cash flows and discounting them back to the present using a weighted average cost of capital (WACC)
- Comparable Company Analysis (“Comps”) — benchmarking the company against publicly traded peers on metrics like EV/EBITDA and EV/Revenue
- Precedent Transaction Analysis (“Precedents”) — looking at what acquirers have paid for similar companies in past deals
- LBO Analysis — particularly for targets that may attract private equity interest, modeling what a financial sponsor could pay and still hit their return hurdles
This valuation “football field” ultimately informs the board’s thinking on what price range is fair and what the bank will use in negotiations. If you want to sharpen your technical skills here, the WSMM Technical Cheatsheet is a great starting point, and our free course walks through core valuation concepts step by step.
Preparing the Marketing Materials
On the sell-side, the bank also prepares two key documents: the Confidential Information Memorandum (CIM) — a detailed overview of the business, its financials, competitive position, and growth strategy — and a shorter teaser that goes to potential buyers before they sign an NDA. These documents are the buyer’s first real look at the company, so they need to be compelling and accurate.
Step 3: Running the Process — Buyer Outreach and First-Round Bids
With materials ready, the bank begins outreach. In a broad auction, this could mean contacting 50-100 potential buyers — a mix of strategic acquirers (companies in the same or adjacent industries) and financial sponsors (private equity firms). In a targeted process, the bank might approach just a handful of pre-selected parties.
Interested parties sign an NDA and receive the CIM. They then have a few weeks to review the materials and submit an Indication of Interest (IOI) — a non-binding letter that outlines the price range they’d be willing to pay, their proposed deal structure, and any key assumptions or conditions.
The bank and the seller review all IOIs and select a subset of buyers to advance to the next round. Parties that don’t make the cut are typically thanked and told the process has moved forward without them.
Step 4: Due Diligence and the Data Room
Buyers who advance to the second round gain access to a virtual data room (VDR) — a secure online repository of detailed financial, legal, operational, and HR documents. Due diligence is the buyer’s process of verifying everything the seller has represented about the business.
What Gets Scrutinized in Due Diligence
- Historical and projected financial statements
- Customer and revenue concentration
- Contracts with key customers, suppliers, and employees
- Intellectual property and litigation exposure
- Environmental and regulatory compliance
- Management team quality and retention plans
Buyers also typically get the chance to meet with the company’s management team in formal “management presentations” — structured sessions where the CEO, CFO, and other executives walk through the business in detail and answer buyer questions.
Due diligence is one of the most labor-intensive phases of the M&A deal process for junior bankers. Analysts spend enormous amounts of time fielding due diligence questions, organizing data room documents, and coordinating between the seller’s team, the lawyers, and the buyer.
Step 5: Final Bids and Negotiation
After due diligence, qualified buyers submit final bids — detailed, binding proposals that include a specific purchase price, deal structure (cash vs. stock, how much debt, etc.), proposed representations and warranties, and a markup of the Purchase Agreement.
The bank and its client evaluate all final bids not just on price but on certainty of close, deal structure, treatment of employees, and regulatory risk. A slightly lower bid from a buyer with no financing contingency and a clean markup might be preferred over a higher bid from a buyer who needs significant regulatory approvals.
Negotiations then begin in earnest — on price, on the purchase agreement language, on representations and warranties, on any escrow arrangements, and on management retention packages. This stage requires close coordination between the investment bankers, the lawyers (M&A counsel on both sides), and the company’s senior leadership.
Step 6: Signing and Announcement
When both parties agree on all terms, they execute the Purchase Agreement (or Merger Agreement in a stock deal) and publicly announce the transaction. The announcement typically includes a press release, an investor presentation (if either company is public), and sometimes a joint call with analysts.
For public company deals, the board of directors must formally approve the transaction, and shareholders of the target (and sometimes the acquirer) often need to vote on the deal. The bank issues a fairness opinion — a formal letter to the board stating that the deal price is fair from a financial point of view — which protects the board from shareholder lawsuits.
Step 7: Regulatory Approvals and Closing
Between signing and closing, the deal must clear various regulatory hurdles. In the U.S., most transactions above a certain size must be filed with the FTC and DOJ under the Hart-Scott-Rodino (HSR) Act. Large cross-border deals may also require approvals from regulators in the EU, China, and other jurisdictions.
Antitrust review can take anywhere from a few weeks to many months depending on the deal’s competitive sensitivity. If regulators have concerns, they may require the parties to divest certain assets or businesses as a condition of approval.
Once all regulatory clearances are obtained and any other closing conditions (like financing) are satisfied, the deal closes. Funds are wired, ownership transfers, and the deal team — after months of late nights — can finally celebrate.
What This Means for IB Recruiting
Interviewers at top banks expect candidates to be able to walk through the M&A process fluently. You should be able to explain the role of the sell-side advisor vs. the buy-side advisor, discuss the difference between a strategic buyer and a financial sponsor, and explain why a company might prefer a negotiated deal over a broad auction.
Beyond the technical knowledge, interviewers want to see that you understand the judgment involved at each stage — why certain buyers get cut after round one, why a lower offer might win, what makes due diligence findings deal-breakers vs. negotiating chips. That kind of nuance comes from preparation, mentorship, and practice.
If you want to see how we prepare students to speak confidently about M&A processes and ace technical interviews, check out our coaching methodology and read through some student success stories. You can also explore our free resources for more guides and prep materials.
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Understanding the M&A deal process is one piece of the puzzle — but translating that knowledge into interview-ready answers is another skill entirely. At Wall Street Mastermind, we’ve helped hundreds of students land offers at bulge bracket and elite boutique banks by giving them the personalized preparation that generic resources can’t provide.
If you’re serious about breaking into investment banking, apply to work with us here. We’ll assess where you are in the process, identify your gaps, and build a plan to get you to offer.
