Behind the Deal: The Legal Anatomy of an M&A Transaction
Corporate & Project Finance Research
Chief Legal Analyst
Source: TFR.
An M&A transaction is neither an easy nor a particularly fast endeavour. It has to strike the balance between interests and commitments of multiple parties, whether they are strategic or financial buyers, the entity being sold, or their many and different kinds of advisers for financial, legal, tax, or operational matters.
There is, though, a difference between a merger and an acquisition. Acquisitions involve one company absorbing another, usually smaller, company. Mergers combine two companies into one legal entity. The discussion will be focusing on acquisitions. And now what does it actually involve?
“A mergers and acquisitions (M&A) transaction is a staged process in which commercial intentionsare progressively translated into information rights, procedural obligations, internal approvals, and ultimately binding transaction documentation.”
The legal and procedural framework presented follows a typical private-company sell-side auction process (or a controlled / limited auction) managed by the seller's board of directors, special transaction committee, and M&A advisers. Rather than engaging in informal or one-off negotiations with a single buyer, a structured auction approaches a calibrated universe of potential strategic and financial buyers under standardised rules and timelines. This process ensures that bidders receive comparable information at each phase, as information is key in the context of bidding and so that all parties preserve their negotiating leverage throughout the transaction lifecycle.
While the sell-side process follows a standard structure, exact transaction sequencing, legal documentation, and terminology vary based on several factors.
1. Jurisdictional & Regulatory Frameworks: M&A transactions operate under the principle of party autonomy, giving contracting parties the legal freedom to choose the governing jurisdiction and specify dispute resolution mechanisms. Furthermore, regulatory requirements dictate the legal and temporal gap between signing and closing. Statutory filings with the Federal Trade Commission (FTC) and Department of Justice (DOJ) in the U.S. will be referenced.
2. Transaction Structure: Whether a transaction is structured as an equity purchase, a direct asset purchase, or a statutory merger fundamentally alters contract assignment rules, liability transfer, required third-party consents, and tax treatment.
3. Nature of Buyer and Seller: Deal dynamics adapt depending on whether the seller is a founder, a corporate parent selling a division, or a private equity sponsor exiting a portfolio asset, as well as whether the acquirer is a strategic buyer seeking synergies or a financial buyer deploying leveraged capital.
4. Terminology: Standard process deliverables and milestones vary by jurisdiction and deal type, such as Indications of Interest (IOIs; U.S.) versus Non-Binding Offers (NBOs; the UK, Europe, and cross-border transactions), or Letters of Intent (LOIs; U.S.) versus Term Sheets (often used interchangeably with LOI; Global) and Heads of Terms (the UK, Australia, and Commonwealth jurisdictions).
After clearing this up, the four staged phases mentioned in the M&A definition have to be outlined, which summarise the transaction process:
The trigger of an auction comes with a Decision to Sell. It represents the agreement of the company’s board of directors, controlling shareholders, or parent corporation, where it gets formally decided that the firm will explore strategic transaction opportunities. It is usually galvanised by commercial drivers like restructuring, or liquidity needs.
Generally speaking, when the board formalises the decision to explore strategic alternatives and creates the formal guidelines and internal protocols, the seller moves to hire its advisory team by organising an advisory pitch competition. This is when rival investment banks and M&A advisory firms compete for the sell-side mandate in a “beauty contest”.
When the client evaluates the competing proposals and chooses its preferred adviser, the relationship is formally cemented by negotiating and signing an engagement letter, also known as the sell-side mandate. It outlines the legal parameters of the advisory relationship, defining the adviser's scope of work in managing the deal, its fee structure, the exclusivity of representation, etc.
Having that covered, the adviser and seller then work together to establish the tiered buyer list (buyer universe) together with bidder outreach parameters. It typically separates potential counterparties into strategic acquirers and financial sponsors.
After confirming the final version of the buyer list, the adviser begins with confidentially distributing an anonymised one-to-two-page overview of the business being sold known as the teaser. It represents an initial market profile and acts as a high-level confidential summary as the name of the firm is not usually given. In the meantime, the potential buyers can see the business model characteristics, industry trends, geographic reach, as well as normalised financial metrics, meaning metrics adjusted for non-recurring revenues and expenses.
With this the teaser could be described as an initial non-binding invitation for a price discovery without revealing the potential target as it may distort their pricing. It also does not offer much confidential internal information, which could affect the seller’s trade secrets and harm it.
Legally speaking, as it is distributed prior to executing any confidentiality agreements, it includes disclaimers excluding liability for reliance. Prospective buyers that express willingness after reviewing the teaser must follow on with a Non-Disclosure Agreement (NDA) before obtaining detailed confidential materials or advancing in the auction process. This acts as a legal safeguard against data leaks.
The next important element is the NDA (Non-disclosure Agreement), also known as the confidentiality agreement. When parties enter negotiations for a potential M&A transaction, sensitive information about the target company may need to be kept under confidentiality. In a unilateral NDA, there is obligation only for one party, while in mutual NDA both have confidentiality obligations. When two parties are doing business together, they want to protect their interests and any detail of potential deal.
The party sharing sensitive information - the disclosing party, seeks to protect it, while the receiving party agrees to not share this information with unauthorised third parties or use it for any other purposes outside the agreed framework. The importance of the NDA is clear in M&A transactions. A potential buyer needs to have access to information on the targeted company to decide whether to proceed with the acquisition. However, this does not by any means guarantee that the transaction will be executed.
It is important to highlight the exclusions, the scenarios where confidentiality obligations do not apply. Parties must acknowledge, by presumption, that not all information can be protected by the NDA, because some information cannot be kept secret. Such information can be the following - information already in the public domain, information already known by the recipient prior to the agreement, information gathered independently by the recipient or received information from a third party.
Another important issue is the operational and duration terms. They specify how long the agreement lasts and how confidentiality duties survive after termination (some trade secrets may survive after termination indefinitely). Additionally, all confidential information may be required to be returned or destroyed by the party responsible. The receiving party is typically required to either return the target company’s confidential information or destroy it, depending on the terms of the NDA.
The NDA in M&A transactions is not only about keeping confidentiality. It creates a legal framework where information begins to flow between the potential buyer and the targeted company. Therefore, once the framework is established, the seller can provide the potential buyer with more relevant information and the process of due diligence can begin.
Before continuing to the next phase of the transaction, we have to still take into account some technical preparation measures as some of them may have legal importance. One such instance is the VDR, or Virtual Data Room, which is the secured data platform used to store confidential documents and all significant pieces of information, which get used during that process.
Through documentation, sourcing, indexing, and file organisation it enables an easy-access data retrieval mechanism for legal, financial, tax, and operational documentation by the seller and its adviser prior to launching due diligence processes of any kind.
With the VDR architecture established and initial information controls configured, the seller advances to Phase II with a focus on NDAs and a CIM (Confidential Information Memorandum).
The foundations have been laid, actors have entered the process, and the bidding war begins with the first-round Process Letter.
The First-Round Process Letter is a procedural document issued by the sell-side adviser to prospective bidders who have executed an NDA. It outlines the ground rules, submission guidelines, and deadlines for submitting initial, non-binding Indications of Interest (IOIs) in the U.S., also known as Non-Binding Offers (NBOs) in the UK and in Europe. The idea is to level the playing field for all participants within the auction, to limit contact with the seller’s management, and to ensure objectivity.
Buyers synthesise the instructions in the process letter together with their preliminary financial analysis to create their Indications of Interest. The IOI serves as an essential screening instrument for the seller during first-round price discovery.
It could be regarded as an intern candidate who sends their cover letter with the answers of a given limited case study to outline fit and expertise for the job.
During the whole bidding process after submitting the first process letter, the seller’s advisers finalise its VDD or Vendor Due Diligence. The idea revolves around a highly sophisticated deep dive analysis of the seller by independent advisers, which are hired by the seller. It is a multidisciplinary analysis spanning over financial, legal & tax, operational due diligence. The final result is then the VDD, which provides a standardised third party-validated in-depth analysis of the business, revealing many possible hidden red flags, which is the reason why the seller wants to finish it before the next phase, and namely to close the gaps, which might arise in expectations against reality.
The VDD hence allows the seller to take control of the transaction narrative. It is a well-known fact that people seek the best deal possible and are willing to exploit others’ vulnerabilities in order to gain an edge, especially when the sums transcend what a normal person could earn in a lifetime. This could save the seller significant re-trades, i.e. the bidders arguing that the target valuation should be set lower, which could be considered an early start in the case of the seller and a good investment for those professional services.
While preparing the Vendor Due Diligence, the seller and the sell-side advisers create the buyer shortlist. The shortlist is the selective group of prospective acquirers, which will continue to the second-round of the bidding process based on selective criteria named in the first process letter. Those potential buyers typically range between three and six. Crucially, a higher headline valuation does not guarantee selection if a bid carries substantial regulatory, financial, or counter-party governance risk.
Once the board approves the shortlist, the seller issues the Second-Round Process Letter.
The crowd has been dispersed. Now the most difficult part begins once the shortlist members have been informed that the next step of the bidding process commences.
The kick-starter, as already mentioned, is the second process letter, which is the document that establishes the formal rules, instructions, and timetable to the newly shortlisted final few for conducting deep-dive due diligence, participating in management presentations, submitting Q&A requests, and delivering final acquisition proposals alongside redlined mark-ups of the seller's draft Share Purchase Agreement (SPA).
Unlike first-round instructions, it is now mandated that bidders submit firm pricing, a redlined draft of the SPA (more on that later), and fully underwritten equity and debt commitment letters. The last bit could be depicted as the buyer opening the “suitcase with cash” on the table in front of the seller to show them that they have the financing needed for the deal and to show commitment.
Shortlisted bidders based on the second-round guidelines receive access to the Virtual Data Roomand are now able to review Vendor Due Diligence (VDD) materials before starting with the detailed buyer due diligence, again reaffirming that levelling of the playing field as everyone receives the same VDD. But before the real due diligence begins an important aspect has to be covered as to why the due diligence is done in the first place.
With a common analytical baseline now covered, the seller then discloses its preferred contractual framework, i.e. the posh way of calling their favourable deal, via the Seller’s Draft Share Purchase Agreement (SPA). It establishes the proposed transaction structure, purchase price adjustment mechanics, and legal safeguards under corporate law principles, which will be discussed in more detail later on.
Having the seller-drafted agreement live allows the seller to steer the conversation regarding the legal framework in its favour, as well as to establish its preferred risk allocation, while competitive tension is at its peak. By requiring bidders to submit a fully marked-up, redlined draft alongside their final offers, seller can evaluate and compare proposals on both legal terms and implied valuation. Basically, the best possible mix of both headline numbers and legal certainty.
Now the most stressful part begins, where all bidders start to claw at the door of the seller’s backyard with access to the full company data and its management to directly answer all uncomfortable questions regarding its financial, legal, tax, commercial and operational situation during the buyer due diligence. The process is really similar to the VDD so that financial, legal & tax, as well as operational alignment has to be reached through specialised consultants, either in-house or outsourced. This due diligence transforms general information disclosure into a game of “lie detector”, where all possibilities are tested and the seller is given the chance to repent itself and to tell the truth before someone finds out.
Subsequently, a surprisingly tech-focused way of centralising Q&A through software-managed trackers enforces following strict processes and allows objectivity and information alignment across competing bidders. Quite an interesting way to ask a question, so to speak. To test their due diligence findings further the bidders then focus their attention on the firm’s management and its assets.
As the culminating part of their investigation and to test their findings yet again, the “lie detectors” move from document review to direct interaction during management presentations and site visits. Typically conducted alongside the buyer due diligence, these sessions allow prospective acquirers to inspect the situation first-hand regarding the condition of physical assets, the governance by management, and internal information, which may not have been visible right away within the data room, whilst adhering to the second-round process letter’s conditions on information alignment.
From a legal perspective, the buyer due diligence has a different purpose than only confirming whether the company is commercially attractive. It is also tasked to determine whether the target company actually owns what it claims and what legal obligation the buyer will inherit when the acquisition is done. In the general practice, lawyers focus on provisions that the transaction will trigger – for instance, change of control or termination provisions. The most important point during buyer due diligence is to identify a potential risk before it occurs.
The ball is now on the buyers’ side of the fence, and the seller awaits the final offers of the remaining auction participants. But before that each buyer has to sort out their internal procedures and finalise all documentation before proceeding with the final offer.
Prior to submitting a final binding bid, the buyer's deal team presents its detailed synergy, risk, and financial projections and models to the IC (investment committee) for formal clearance. This is when they seek a buyer IC approval, or a board approval in case of corporate acquirers, which marks a milestone in the process, where a prospective buyer's governing body evaluates and authorises the transaction.
From a sell-side process perspective, verifying that a bidder has secured unconditional IC or board approval is essential for assessing execution certainty, which is one of the three main conditions alongside financial and legal risks. Proposals submitted with outstanding internal approval contingencies are flagged as non-conforming by sell-side advisers and penalised in bid rankings. And in this competitive world it likely means that the firm would have a significant detriment to choose that company over much safer bets.
Once the buyer's deal team obtains unconditional IC authorisation, it submits its binding bid.
The final offer comprises the final purchase price, consideration mix, and fully underwritten debt and equity commitment letters, accompanied by a comprehensive redlined mark-up of the seller’s draft Share Purchase Agreement (SPA).
From a legal standpoint, submitting a binding bid alongside an SPA mark-up converts exploratory diligence into a definitive commercial and contractual commitment. Submitting the a binding bid together with a marked-up SPA moves the process, because it requires the bidder to define the contractual terms on which it is prepared to proceed with the transaction. Additionally, the SPA mark-up shows the bidder’s allocation of legal risk and the scope of representations and warranties. Therefore, the seller receives the “preview” conditions and indemnities of the buyer that potentially are going to be in the actual SPA.
The seller’s board and advisers compare the submitted final bids and contract mark-ups to select the preferred bidder and execute an exclusivity agreement to finalise definitive transaction documentation. It is the formal determination by the seller’s board of directors to choose the winning acquisition proposal at the conclusion of second-round bidding. Exclusivity contractually restricts the seller and its target company from soliciting, encouraging, or negotiating alternative transaction proposals with competing bidders for a defined duration, typically 30 to 60 days. Executing an exclusivity agreement shifts the deal dynamic from a competitive multi-bidder auction to a bilateral negotiation.
A brief excursus to the final offer could be the term LOI, meaning a letter of intent. It is often used in bilateral negotiations as opposed to auctions and sets out the principal terms on which the parties intend to pursue a potential transaction. The letter of intent is in general not legally binding, except certain provisions like confidentiality obligations, which are binding and legal consequences emerge if they are breached.
Depending on the structure of a transaction, the LOI can be used before extensive due diligence or before negotiating the final terms of the deal. Its purpose is to demonstrate the seriousness of the parties and to establish a clear plan for the transaction.
Therefore, the LOI provides a common framework, as in some way is very analogous to the earlier stages of an auction process, but with a bilateral element.
With this the market part of the M&A transaction is closed and now legal as well as regulatory hurdles and counterparty interests take centre stage. Risks and leverage shift, while the underlying deal moves from a question of “Who buys?” to “Will it ultimately work?”.
The Share purchase agreement (SPA) is the next step. The real economic terms of an M&A are finalised within this agreement. The main objective of the Share purchase agreement is to establish who is responsible for the financial burden when the target’s company condition diverges from what was during due diligence. Distinction needs to be made between the Asset Purchase Agreement, which transfers selected assets and liabilities, Share purchase agreement (SPA) only governs deals where shares are bought.
Share purchase agreement (SPA) has a complex legal character, however it is important for the parties involved to be aware of all the details. Analogously to other agreements in a M&A transaction, Share purchase agreement (SPA) has several essential elements. The first is the parties involved (buyer and the seller), they need to be identified by their legal names. The recitals provide context to the agreement- why the transaction is happening and what are the intents of the parties. Terms such as “Shares” and “Purchase Price” need to be clearly defined, then the numbers of shares being sold are clarified precisely. Purchase Price and payment terms detail the amount the buyer is paying for the shares and the method of payment.
Additionally, important elements are the Representations and Warranties, because they establish certain statements and assurances which parties enter into the transaction. Typically, they are mostly associated with the seller, however the buyer can provide his representations and warranties as well. From the seller’s perspective, it is important to provide assurances regarding the company’s financial position or existing liabilities. The main objective is to give the buyer contractual protection regarding the condition of the company. On the other hand, from buyer’s perspective, it may be necessary, depending on the deal, assurances to be provided. The most common example is the assurance that transaction is possible, meaning the buyer has the capacity and funds to complete the acquisition. Representation and warranties allocate the risk between the buyer and the seller. Therefore, due diligence is when the buyer investigates the target’s company, while R&W provides the contractual obligation for matters which concerns both parties.
To complete the SPA, several other provisions need to be taken under consideration. Covenants allow or restrict parties from certain actions. They are important, especially in the period between signing and closing. For example, the seller may continue to govern the company in its ordinary way, taking important decisions, without the buyer’s consent. A covenant clause may restrict such performance. Additionally, indemnities are very specific provisions. The main idea behind indemnity clauses is to establish a contractual obligation for compensation for losses from risks found during due diligence (according to the conditions in the SPA). During the investigation (due diligence) of the target company, the buyer may discover an unsettled tax dispute. The problem itself may not mean that the buyer will withdraw from the acquisition, instead the parties may negotiate who should bear the financial consequences if the identified risk materializes. Therefore, SPA may contain a specific indemnity (compensation) under which the seller agrees to compensate the buyer for the losses from the tax dispute.
This helps us distinguish the indemnities from representation and warranties. As we mentioned, in R&W there are statements and assurances and if one of the parties breaches or gives an incorrect statement, there are contractual remedies for the other party under the SPA and applicable law. An indemnity, by contrast, allocates a specified risk identified during due diligence and parties negotiate who will bear the losses.
SPA also establishes the closing procedure – the section establishing the details of the closing, determines what parties must do to complete the transaction such as when to pay the purchasing price, delivering the documents and other important actions. Termination rights establish the circumstances under which the termination clause can be activated by one of the parties. Finally, based on the principle of party autonomy, parties have the freedom to choose which jurisdiction to govern the deal and where any legal disputes will be resolved (the dispute resolution mechanism).
Signing is the next important element in the process. The primary purpose of the signing is to convert the negotiated terms into a legally enforceable contract. Once signed, neither party can unilaterally alter the purchase price or the transaction structure of the Share Purchase Agreement (SPA). However, signing does not necessarily mean the acquisition has been completed or that ownership of the shares already passed to the buyer.
In larger transactions, for instance, there may be a period between signing and closing in which certain conditions must be satisfied. Such conditions can include regulatory approvals or conditions already established in the SPA. For example, in the United States, certain transactions falling under the framework of the Hart-Scott-Rodino (HSR) Act requirements must be notified to the Federal Trade Commission (FTC) and Department of Justice (DOJ) and the parties cannot complete the transaction until the premerger waiting period requirements have been satisfied.
Therefore, we need to make a distinction between signing and closing. Signing creates the contractual commitment to complete the transaction according to the SPA, while closing is the stage where the acquisition is fully complete.
In the “signing” section we mention the period between signing and closing of the Share purchase agreement – it is usually referred to as the interim period. During this window, the transaction cannot close until a series of contractual conditions are satisfied, known as Conditions Precedent. The purpose of these legal conditions is to ensure in the first place regulatory compliance (Hart-Scott-Rodino (HSR) Act in the USA or EU Merger Control in Europe) and to protect the buyer from the serious changes to the target business before money changes hands.
Cross-border transactions need to be assessed for national security. In the sense of foreign Direct Investment and national security, reviews are important where big or critical infrastructure or sensitive information is included. In the United States the Committee on Foreign Investment in the United States (CFIUS) conducts such reviews for national security risks.
Beyond government regulators, certain counterparties may have consent or termination rights in connection with the transaction. Such rights may arise from Change of Control Clauses (CoC). These provisions are contained in contracts such as major customer contracts, supplier agreements, software licenses, building leases and loan agreements. Any of these agreements may contain Change of Control Clauses and allow the counterparty to terminate the contract if ownership of the company changes without prior consent.
However, if the transaction does not require any conditions to be satisfied, such as antitrust filings or foreign investment reviews, the parties may execute simultaneous sign and close and execute the transferring of the funds on the exact same day. Therefore, in that case, both parties are bypassing the interim period entirely.
Closing represents the culmination of M&A. As we mentioned, signing binds the parties to the deal structure, on the other hand, closing is the explicit moment when legal title of the shares transfers to the buyer and control of the target company changes.
However, to ensure there won’t be any legal exposure, closing operations are managed through a strict closing agenda. First, executive officers from both the buyer and the seller execute officers’ certificates confirming that all Conditions Precedent (CPs) have been satisfied and the representations and warranties remain true and correct until and as of closing date. Furthermore, an Escrow agreement is executed among the buyer, seller representatives and an escrow bank to govern the holding, only when it concerns release of indemnity or working capital holdbacks.
Money shifts on the closing date, but there is a pre-agreed Funds Flow Memorandum. Firstly, any existing debt is paid directly to financial institutions to secure full release of liens and mortgages. Then, legal and banking advisory expenses are paid. Additionally, contractually agreed funds, typically 5-10% of deal value, are placed into escrow accounts, and the remaining balance is wired directly to the seller’s primary bank. A common misconception in M&A is that sending the purchase price automatically transfers company ownership. Legal title to shares passes strictly according to the corporate law procedure. For instance, in a private company share acquisition, legal title to the share generally passes in accordance with the applicable law of the state, since in the U.S. there is no universal moment of transfer, rather than upon payment. Delaware law is the main source of law that governs transfer of ownership, however not in details, it all depends to the state’s law. For example, under New York law, certified shares may be transferred by delivery of the endorsed share certificate, for uncertified ones, transfer happens when the issuer registers the buyer as the registered owner.
An M&A transaction is not simple - one company does not simply purchase another. It is a structured process which takes time. Both sides agree to legal commitments to protect each other. From the first teaser and competitive bidding to due diligence, to the SPA signing and regulatory approvals, each step has the same function, to allocate risk and control existing risks. Only closing makes all the pieces come together turning months of negotiations into an actual transfer of ownership.
Corporate & Project Finance Research
Chief Legal Analyst