Mergers and acquisitions can create rapid growth, open up new markets, and bring technology, expertise, and competitiveness. At the same time, M&A is among the most complex changes an organization can undertake. The financial logic of the transaction is just the beginning – the true value is often determined by how well strategy, due diligence, leadership, culture, and integration are aligned. This article introduces the field of Merger & Acquisition and describes the process’s three main phases: the preparations before the transaction, the actual transaction, and the integration work after the takeover. You will get an overview of key decisions, common risks, and why many acquisitions do not achieve their original goals. For a Chief of Staff, M&A involves a special responsibility to structure around the management’s priorities, coordinate specialists and stakeholders, and ensure clear communication and follow-up. By addressing dependencies, cultural issues, and implementation risks early on, the role can help realize synergies, retain key competencies, and enable the combined business to achieve the desired effect more quickly without losing customers, focus, or innovation momentum along the way.
An introduction to the field of knowledge:
Merger & Acquisition (M&A)
Brief
An introduction to corporate acquisitions, due diligence and integration work
Merger & Acquisition (M&A) It is the collective field of knowledge surrounding mergers, acquisitions, business sales, consolidations and restructuring of companies. The field combines strategy, economics, law, leadership, organizational development, change management and cultural issues.
One Merger (fusion) means that two companies merge to form a joint operation. One Acquisition (acquisition) means that one company buys another company and gains control over its operations. M&A is today one of the most important tools for companies that want to:
- Grow faster
- Acquire new technology
- Entering new markets
- Strengthen their competitiveness
- Increase profitability
- Eliminate competitors
- Ensure future survival
Many of the world's largest companies have been built through acquisitions rather than solely through organic growth. For example, companies in the technology, pharmaceutical, financial, and industrial sectors have long used M&A as a central part of their strategy. Despite this, a significant proportion of all corporate acquisitions fail to create the value planned. Analyses from consulting firms and research institutions repeatedly show that between 50 and 70 percent of major M&A transactions do not achieve their original goals. The reason is rarely that the financial analysis was flawed. Instead, failures often involve:
- Lack of integration
- Cultural clashes
- Leadership problems
- Personnel turnover
- Lost customers
- Loss of innovation power
It is here that the concepts Pre-M&A, Due Diligence and Post-M&A Integration (PMI) will be decisive.
Three main stages in M&A
Pre-M&A
All activities before the acquisition:
- Strategy
- Goal identification
- Valuation
- Due Diligence
- Business negotiation
Transaction
The actual deal:
- Purchase agreement
- Financing
- Regulatory approvals
- Final takeover
Post-M&A
All activities after the transaction:
- Integration
- Organizational design
- Cultural work
- Follow-up of synergies
- Change management
To understand M&A, one must view the field as a combination of Financial logic and human behavior. The best acquisitions are not those who are only good at numbers. They are also skilled in culture, leadership and change management.
History
Corporate acquisitions have occurred since industrialization.
First wave (1890-1920)
Many large industrial conglomerates were created by merging several smaller companies. The aim was to:
- Create economies of scale
- Check the markets
- Reduce competition
Second wave (1950-1980)
Large conglomerates emerged. Companies bought businesses that were often located far from the core business. The idea was to spread risk.
Third wave (1990-present)
Globalization and digitalization changed the game. Acquisitions are now used to:
- Buying innovation
- Accessing expertise
- Acquire data and technology
- Accelerate digital transformation
Today, M&A is carried out in almost all industries.
Why do companies carry out M&A?
1. Growth
Buying a company can be significantly faster than building the business yourself.
2. Synergies
Synergies arise when the combined operations become more valuable than the two companies were individually. Examples:
- Shared administration
- More efficient purchasing
- Common IT systems
- Shared sales organization
3. Market expansion
Acquisitions can provide:
- New geographical markets
- New customer segments
- New distribution channels
4. Technology and skills
Common within:
- IT
- AI
- Life Sciences
- Telekom
The buyer often buys the competence rather than the product.
5. Competition strategy
Acquisitions can strengthen the market position by reducing competition.
Pre-M&A – the preparation phase
Pre-M&A often determines whether the deal will be successful or not.
Strategic formulation
First, the company must answer:
- Why do we want to make an acquisition?
- What problem should be solved?
- What value should be created?
Common mistakes are starting with a business to buy instead of starting with a strategy.
Goal identification
Potential acquisition candidates are analyzed. Factors:
- Size
- Profitability
- Customer base
- Market position
- Culture
- Technology
Valuation
The company is valued using different methods:
- DCF (Discounted Cash Flow)
- Multiple valuation
- Substantial value
Deal Thesis
A central activity is to formulate a clear investment hypothesis:
- Why are we buying this company?
- How is value created?
- What synergies are expected?
Due Diligence – the critical preliminary work
Due Diligence (DD) is the systematic review of the target company before the purchase.
The goal is to reduce uncertainty and risk.
Financial Due Diligence
Analyzes:
- Results statements
- Cash flow
- Debts
- Revenue quality
Legal Due Diligence
Analyzes:
- Contracts
- Disputes
- Intellectual property rights
- Regulatory issues
Tax Due Diligence
Analyzes:
- Tax risks
- Tax history
- Tax position
Commercial Due Diligence
Analyzes:
- Market
- Competition
- Customers
- Growth potential
IT Due Diligence
Analyzes:
- Systemic landscape
- Cyber risks
- Technical debt
HR Due Diligence
Analyzes:
- Key personnel
- Competence
- Employee incentive programs
- Personnel risks
Cultural Due Diligence – the most underestimated DD
One of the most common reasons why M&A fails is that Cultural Due Diligence does not receive enough attention.
What is Cultural DD?
It examines:
- Leadership style
- Decision-making
- Values
- Communication patterns
- Risk-taking
- Collaborative culture
Why is it missed?
There are several reasons:
- Difficult to measure. Culture is not directly reflected in the numbers.
- Lack of time. Businesses are often driven by financial deadlines.
- Overconfidence in integration. Management often assumes that cultures will adapt automatically.
- Focus on economics. Banks, lawyers and investors often dominate the process. The human perspective ends up in the background.
Consequences of missed Cultural DD
- Key personnel are leaving
- Conflicts are increasing
- Innovation reduces
- Customer relationships are damaged
- Synergies are lacking
What should be analyzed?
- Organizational culture
- Leadership maturity
- Ability to change
- Engagement levels
- Talent retention risks
Many experienced M&A executives argue that cultural compatibility can be as important as financial quality.
Post-M&A – the integration phase
Once the agreement is signed, the real work begins. This phase is called Post-Merger Integration (PMI). Often the activities are coordinated within an IMO., Integration Management Office. Here the value of the transaction is realized.
The most important activities
Organizational integration
- Roles
- Responsibility
- Governance
Process integration
- Work processes
- Decision-making processes
System integration
- ERP
- CRM
- HR system
Customer integration
- Customer communication
- Contract transfers
Cultural integration
- Common values
- Leadership
- Communication
Synergy follow-up
Any expected synergy must be monitored.
Examples:
| Synergy | Goals |
| Purchases | -15 % costs |
| IT | -20 operating % costs |
| Administration | -10 % overhead |
Failed follow-up often means that the synergy effects never occur.
Which actors participate in an M&A?
A corporate acquisition usually involves many parties.
Buyers
The organization that wants to carry out the acquisition.
Sellers
Owner or group of owners who are selling the business.
Investment banks/M&A advisors
Responsible for:
- Process management
- Valuation
- Bud process
Lawyers
Responsible for:
- Contracts
- Regulatory issues
- Risk management
Accountants and financial advisors
Carry out financial DD.
Strategic consultants
Implemented:
- Market analyses
- Commercial DD
- Synergy calculations
HR and culture consultants
Working with:
- Cultural DD
- Change management
- Integration support
Funding actors
Could be:
- Banks
- Private Equity Funds
- Institutional investors
Regulatory authorities
May need to approve the transaction if the competitive impact is assessed to be significant.
Practical example 1
Company A buys Company B to enter a new market. Financially, the deal looks very good. However, after six months:
- 40 key personnel % have left
- Sales organizations have found themselves in conflict
- Customers have started switching suppliers
Reason:
No Cultural DD was carried out.
Practical example 2
Two industrial companies are carrying out a takeover. Before the purchase is completed:
- HR-DD
- Cultural DD
- Leadership assessment
- Integration planning
Results:
- High staff retention
- Quick system integration
- Realized synergies according to plan
Summary
M&A is a multidisciplinary field where strategy, finance, law, technology, and organizational development come together. A successful acquisition is not just about buying a company at the right price but about creating new value after the transaction. Three phases are crucial:
- Pre-M&A – strategy, goal-setting and due diligence.
- Transaction – agreements and implementation.
- Post-M&A – integration and value realization.
The most important insight is that most acquisitions fail not because of faulty Excel models. They often fail because of people, culture, and leadership.
Advantages
- Rapid growth
- Access to new markets
- Acquisition of skills and technology
- Cost synergies
- Increased competitiveness
- Higher market value
Disadvantages, risks and limitations
- Overpayment for the target company
- Incorrect synergy calculations
- Cultural clashes
- Loss of key personnel
- Integration problems
- Regulatory barriers
- Customer losses during integration
Five readiness questions
- Do we have a clear strategic reason to carry out the acquisition?
- Have we identified which synergies can realistically be achieved?
- Have we conducted a full Due Diligence including Cultural DD?
- Do we have the resources and expertise for Post-Merger Integration?
- How will we measure that the transaction actually creates value after 12, 24 and 36 months?
Recommendation
If you want to understand M&A on a professional level, you should study the field as three parallel disciplines:
- Financial analysis and corporate valuation
- Due Diligence and risk management
- Post-Merger Integration and Cultural Management
It is in the interplay between these three areas that successful acquisitions are created. Many experienced M&A executives often summarize it like this:
”You buy the company with finance and law, but you create value through people, leadership and integration.”
