Confidential Information Memorandum (CIM) Explained
What a confidential information memorandum (CIM) is in a sell-side M&A process, what's inside it, who writes it, and where it fits the deal timeline.
Apr 29, 2026 · 7 min read
A confidential information memorandum (CIM) is the central marketing document a sell-side investment bank prepares to sell a company. Mergers and Inquisitions calls it "part of the sell-side M&A process at investment banks," and it goes by other names too: Offering Memorandum (OM) and Information Memorandum (IM). The CIM presents the business being sold to qualified buyers who have signed an NDA, packaging the company's products, financials, and projections to attract the highest possible price. Corporate Finance Institute describes it as "a document used in mergers and acquisitions to convey important information about a business that's for sale." This guide covers what's in a CIM, who writes it, and exactly where it lands in the deal.
TL;DR
- A CIM is the marketing document a sell-side bank uses to sell a company to buyers who have signed an NDA.
- Also called the Offering Memorandum (OM) or Information Memorandum (IM); never legally binding.
- Wall Street Prep lists 8 core sections: overview, products, market, sales, management, financials and projections, risk factors, appendices.
- CIMs typically run 50-plus pages; Wall Street Prep cites examples from 58 to over 100 pages.
- M&A analysts build the CIM through "countless iterations and revisions," sent after the teaser, before the IOI.
What is a confidential information memorandum?
A confidential information memorandum is a detailed marketing document that a sell-side investment bank prepares to present a company to potential acquirers. Wall Street Prep defines it as "an M&A document prepared by a company in an effort to solicit indications of interest from potential buyers." The job of the CIM is to show the business in its best light while giving buyers enough to run preliminary due diligence and decide whether to bid.
The CIM is deliberately persuasive, not neutral. Mergers and Inquisitions notes the document leans on optimistic financial projections against conservative historical performance, and emphasizes growth opportunities, market leadership, and risk mitigation. Critically, it contains no valuation: bankers avoid naming a price so buyers set the number. If you're new to the deal-advisory side of banking, our investment banking groups explained guide maps where this work sits.
What's inside a CIM?
A CIM is organized to walk a buyer from the high-level investment case down to the numbers. Wall Street Prep lists the standard sections: overview and key investment highlights, products and services, market, sales and marketing, management team, financial results and projections, risk factors (sometimes omitted), and appendices. Corporate Finance Institute breaks it into ten parts, opening with a one to two page executive summary.
The financials are the heart of the document. Buyers use the historical results and projections to test assumptions, build their own model, and decide whether the opportunity fits their criteria. The table below maps the typical sections to what each one delivers.
| CIM section | What it covers |
|---|---|
| Executive summary | 1-2 page snapshot of the company and investment thesis |
| Investment highlights | The core reasons to buy: growth, market position, moat |
| Products and services | What the company sells and to whom |
| Market overview | Industry size, growth, competitive landscape |
| Management team | Key executives and operational depth |
| Financials and projections | Historical results plus forward-looking forecasts |
| Risk factors and appendix | Risks, plus supporting models and data |
Who writes the CIM and why?
The seller's investment banking deal team writes the CIM, with the work flowing down the hierarchy. Wall Street Prep describes the split: senior bankers solicit details from the seller, and M&A analysts "transform those details into an appealing presentation" through "countless iterations and revisions." The analyst owns the build; the associate and VP review; the seller signs off.
The motivation is direct. Corporate Finance Institute notes the banker functions as a marketing document creator aiming to present the company so it can "sell for maximum value," because the advisory commission depends on the final sale price. That alignment is why the CIM reads as a pitch rather than a balanced report, and why buyers treat every projection as a claim to verify. For a sense of how this lands in a junior banker's week, see our day in the life of an investment banking analyst.
Where does the CIM fit in the deal timeline?
The CIM sits in the second step of a sell-side process, right after the teaser. Mergers and Inquisitions describes the sequence: the bank first sends a short 5 to 10 page "Executive Summary" or "Teaser" to a list of potential buyers, and any party that expresses interest signs an NDA before receiving the full CIM. Only NDA-signed buyers see the detailed document.
Once distributed, the CIM becomes the foundation for first-round bidding. Buyers assess the financial history, test the assumptions, and decide whether the opportunity aligns with their investment criteria. If it does, they submit an indication of interest (IOI) or a letter of intent (LOI). The CIM is not a contract: it is purely marketing material, and buyers must run full due diligence before closing. The numbers a buyer pulls from the CIM feed straight into their valuation work, which is why our comparable company analysis guide is core reading for anyone working a live process.
How does a CIM differ from a pitch book and a teaser?
A CIM, a teaser, and a pitch book are three distinct documents that appear at different points. The teaser is the short, anonymized 5 to 10 page summary sent to a broad buyer list before any NDA. The CIM is the full, named document sent only after an NDA. A pitch book, by contrast, is the bank's own sales presentation used to win the mandate in the first place, before the company is even officially for sale.
Wall Street Prep notes CIMs are similar to investment banking pitchbooks in format and notes they "don't usually make it out there to the public." The key distinction is audience and purpose: the pitch book sells the bank to the client, while the CIM sells the client's company to buyers. Understanding that document chain is exactly the kind of process fluency our investment banking technical interview questions guide drills.
Frequently Asked Questions
What does CIM stand for in investment banking?
CIM stands for confidential information memorandum. It is the detailed marketing document a sell-side investment bank prepares to present a company to potential buyers in an M&A process. Mergers and Inquisitions notes it is also called the Offering Memorandum (OM) or Information Memorandum (IM).
How long is a typical CIM?
CIMs typically run 50 or more pages. Wall Street Prep cites examples ranging from 58 to over 100 pages depending on the complexity of the business. The teaser that precedes it is far shorter, usually 5 to 10 pages.
Does a CIM include a valuation or asking price?
No. Mergers and Inquisitions notes bankers deliberately leave valuation out so buyers set the price themselves. The CIM gives buyers the financials and projections to build their own valuation, then they submit an indication of interest (IOI) or letter of intent (LOI).
Who writes the confidential information memorandum?
The seller's investment banking deal team writes it. Wall Street Prep explains that senior bankers gather details from the seller while M&A analysts turn those details into the presentation through repeated revisions. The work is led by the analyst and reviewed up the hierarchy.
When in the M&A process is the CIM sent?
The CIM is sent in the second step of the sell-side process, after the teaser and after the buyer signs an NDA. Mergers and Inquisitions describes the order: teaser to a broad list, NDA for interested parties, then the full CIM, which feeds the first round of bidding.
Is a CIM legally binding?
No. Both Mergers and Inquisitions and Wall Street Prep stress the CIM is purely persuasive marketing material, not a contract. Buyers must run their own full due diligence to verify every claim before committing to an acquisition.
Sources
- Mergers & Inquisitions: Confidential Information Memorandum (checked June 2026)
- Wall Street Prep: Confidential Information Memorandum (CIM) (checked June 2026)
- Corporate Finance Institute: CIM - Confidential Information Memorandum (checked June 2026)