Post-M&A Integration: Unlocking Long-Term Value Beyond the Deal

Closing the deal is only the beginning; the true challenge -and opportunity- lies in what follows: integration. Integration is the key to M&A success. Despite the strategic intent behind most M&A transactions, research shows that 70% of M&A transactions fail to realise their full value, largely due to integration issues. A disciplined approach to integration will improve chances of deal success and keep the value drivers behind the deal in focus, such as, more rapid return on deal investment, better capitalisation on post-deal opportunities, lower levels of organisational uncertainty and proactive approach to pre-identified integration challenges.

Five Essentials for Successful Post-M&A Integration

Integration success hinges on early planning and cross-functional execution. Here are five essentials to keep in mind:

1. Form your integration team early – Include legal, tax, HR, and IT stakeholders to ensure alignment from Day One.
2. Focus on Day One readiness – Prioritise continuity in operations, communications, and compliance.
3. Translate due diligence into action – Use findings to shape integration priorities and risk mitigation.
4. Engage regulators proactively – Anticipate approval timelines and compliance hurdles.
5. Understand employee representation obligations – Especially in multi-jurisdictional deals, early consultation is key.

Legal Considerations in Integration

There are different types of post-M&A integrations dependent on the level of integration intended between buying and target companies. Eversheds Sutherland’s multi-jurisdictional team can play a pivotal role in shaping and executing integration.

Several focus areas demand attention:

Legal Entity Consolidation and Restructuring, Governance and Compliance

Integrating acquired entities into the existing corporate structure requires careful planning. Legal entity rationalisation and restructuring, governance alignment (including authority levels and signatures), cash utilisation and compliance should ideally be addressed to allow for optimal structuring.

Third-party Contracts

Pre-closing, companies must assess existing trading relationships to identify relationships/overlaps, conflicts, inconsistencies and compliance risks (such as anti-bribery, sanctions and antitrust). Key commercial agreements should be reviewed for clauses related to assignment, change of control, termination, pricing, indemnification, liability caps, exclusivity, non-competes and similar restrictions and regulatory obligations. Where assignment is needed, a strategy must be developed, especially in regulated sectors where certifications or accreditations may be required. Post-closing, the focus shifts to aligning contract terms and conditions, updating or terminating third party contracts and integrating contracts into a centralised management system. For contracts that cannot be assigned or are terminated, fallback solutions must be in place to avoid operational disruption.

Real Estate

Any real estate-related obligations, such as change of control provisions or assignment of leases, should be reviewed. Companies should assess their real estate requirements post-closing, including whether they have the right to vary or terminate existing leases and what timelines apply under those agreements. Attention should also be given to related guarantees. Physical integration of business operations may require relocating employees to existing sites and coordinating operational changes such as movement of assets and equipment.

IT Systems

Companies should begin by evaluating the capabilities of existing systems to ensure they can maintain a stable and efficient infrastructure post-transaction. Data integration is a key priority, enabling consistent access to information across the organisation. IT planning should also focus on identifying synergies that allow major business functions to be streamlined and harmonised. Maintaining a seamless customer experience is critical and integration efforts should aim to avoid disruptions. Additionally, companies must assess whether their current infrastructure/ERP system can manage transitioned contracts effectively. Finally, a thorough review of IT assets -including software licenses and maintenance agreements- is necessary and compliance with regulatory and compliance requirements needs to be assured.

Regulatory

A key priority is identifying who will be considered the ‘legal manufacturer’ post-transaction, as this affects personnel responsibilities, record keeping and quality processes. Every license and authorisation must be reviewed to determine whether notifications are required due to changes in control or process. If licenses or authorisations do not transfer immediately, companies must clarify who will bear the regulatory burdens -such as reporting, document retention, market surveillance and liability for product failures.

Workforce and Employee Benefits

Workforce integration requires early and careful planning to manage legal obligations and employee impacts. In certain scenarios, buyer might even have such obligations. There may be obligations toward employee representative bodies, which have to be discharged even before a binding agreement is signed. Pre- and post-close restructuring activities -such as changes in business structure, financing arrangements, operational plans or requesting advice from an expert outside the company concerning one of these matters- may also trigger these obligations. Due diligence should include a thorough review of employee populations by entity and representative bodies. Consider the timing of public and internal communications about integration, synergies, restructuring, harmonising of terms and the impact it may have on employee representative obligations. Retention strategies, including incentives and bonuses for key talent, should be built into the integration plan.

Data

Data integration planning is important, especially when personal data needs to be transferred before closing. Companies must ensure that only necessary data is shared and that the disclosure and recipients of data are limited. These transfers have to comply with data protection laws, which may involve consulting works councils and considering local regulatory guidance. To manage risks a governance framework for complex integrations involving large volumes of information should be considered. Post-closing, buyer must respect seller’s privacy policies and additional considerations for any expanded use of data. Transitional services may involve ongoing data processing by seller, so agreements must be reviewed to ensure they meet data protection standards. Finally, the acquired business should be integrated into buyer’s data protection governance structure. This includes updating policies, procedures and rolling out a consistent compliance program.

Tax

Tax planning and optimisation of the corporate structure should begin well before signing and/or closing of the transaction. Timely sharing all information throughout the lifecycle of a transaction and early involvement of both internal and external tax teams are vital. It helps avoid post-closing tax mines. The structure of the deal -whether it is a share or asset transaction- can significantly impact tax elections and compliance requirements. Post-closing, businesses face a range of tax compliance tasks, including new registrations, stub-period returns and audits. Focus should also be laid on maximising tax attributes and on integrating and rationalising entities, assets and intellectual property.

Building a Practical Integration Roadmap

1. Define pre- and post-close workstreams
2. Assign ownership to integration leads
3. Align timelines with business priorities
4. Track success with measurable KPIs

To develop and execute an integration plan successfully, the gap between deal and integration teams should be bridged, due diligence findings should be implemented and the deal information should be passed to relevant team members. The integration plan should clearly define pre-closing and post-closing workstreams, assign responsibilities to a dedicated integration team, set realistic timelines, and establish measurable success criteria. External advisors may play a valuable role in developing an integration plan and supporting the execution.

Are you preparing for an M&A transaction or post-close reorganisation?

Our ICR team at Eversheds Sutherland is ready to support you at every stage. Whether you need strategic advice, hands-on implementation, or a second opinion, we offer seamless, cross-border legal support tailored to your business transformation goals.

We are able to support the implementation of all types of business transformation, our Corporate, Commercial, Regulatory and Compliance, Employment, Pensions, IP, IT, Real Estate and Tax lawyers work together across jurisdictions and disciplines to help clients implement new, efficient structures. Either as lead adviser or acting as a second pair of eyes, we can help refine structures through a micro‑level review. We can provide a global reach that spans approximately 200 countries. As a result, we are able to provide you not only with the local knowledge where you need it, but with seamless delivery of legal services.

Let’s talk about how we can help you turn your transaction into long-term success.