top of page

Get our monthly insights FREE

(frequency: about monthly)

Ready to explore our latest playbooks and lessons learned?

Writer's pictureTed Fujimoto

Surprising Factors That Can Derail a Merger or Acquisition

Updated: Nov 19


Mergers and acquisitions (M&A) are complex processes that require aligning financial, strategic, operational, and cultural factors. While due diligence typically focuses on obvious risks, there are often unexpected issues that can emerge late in the process and jeopardize the success of a deal. Here are some surprising factors that can get in the way of an M&A, backed by research and case studies:



1. Unaddressed Cultural Differences


Issue: Cultural compatibility is one of the most overlooked aspects of M&A. Differences in company culture—ranging from management styles and decision-making processes to employee values and expectations—can create friction, undermine integration, and even lead to high employee turnover.


Example: The merger of Daimler-Benz and Chrysler in 1998 highlighted how cultural mismatch can derail an M&A. Daimler’s formal, hierarchical culture clashed with Chrysler’s more informal, entrepreneurial approach, resulting in a strained working relationship and eventual demerger in 2007.


Mitigation: Conduct cultural assessments early and develop integration plans that respect each organization’s unique culture. Establish clear communication channels and consider “cultural ambassadors” to bridge differences.


Reference: Weber, Y., & Camerer, C. F. (2003). Cultural differences in M&A success. International Business Review, 12(5), 667-684.


2. Hidden Liabilities in Intellectual Property (IP) and Data Privacy


Issue: Intellectual property and data privacy are often assumed to be straightforward assets, but unexamined IP rights, patent disputes, or data privacy liabilities can be unexpected deal-breakers. New regulations, especially around data privacy (such as GDPR or CCPA), can impose significant financial and operational burdens on the acquiring company.


Example: Facebook’s acquisition of WhatsApp faced scrutiny over data privacy concerns, leading to fines and regulatory issues in multiple countries. These issues not only increased costs but also put additional constraints on the integration.


Mitigation: Conduct thorough IP audits and privacy assessments during due diligence to uncover any hidden risks. Ensure compliance with data privacy laws in all jurisdictions where the target company operates.


Reference: PwC (2019). The Value of Intellectual Property in M&A. PwC Report.


3. Key Talent Attrition Risk


Issue: The loss of key employees can severely impact the success of an acquisition. Top talent may leave due to uncertainty, misalignment with the acquiring company’s culture, or lack of incentives to stay.


Example: When Microsoft acquired Nokia’s mobile division, a large number of Nokia’s senior engineers and executives left soon after the acquisition, taking valuable expertise with them and leading to a slower-than-expected integration process.


Mitigation: Identify and prioritize key talent during the M&A process. Implement retention bonuses, clarify roles, and involve key employees in the integration process to increase their buy-in.


Reference: Ranft, A. L., & Lord, M. D. (2000). Acquiring new knowledge: The role of retaining human capital in acquisitions of high-tech firms. The Journal of High Technology Management Research, 11(2), 295-319.


4. Overlapping Customer Bases and Brand Confusion


Issue: Overlapping customer bases or unclear branding strategies can lead to market confusion and reduced customer loyalty. If customers feel that the value of the product or service will change post-merger, they may consider switching to a competitor.


Example: When Sprint and Nextel merged in 2005, the overlapping customer base led to branding and service issues, causing many customers to switch to competitors. This loss of customer loyalty led to a significant decline in revenue and market share.


Mitigation: Conduct market research to understand customer sentiment before and after the merger. Develop a clear brand integration strategy that communicates value to customers and reduces ambiguity.


Reference: Lovallo, D., & Kahneman, D. (2003). Delusions of success: How optimism undermines executives’ decisions. Harvard Business Review.


5. Technology Incompatibility and Integration Challenges


Issue: Integrating IT systems, software, and digital infrastructure can be more challenging than expected, especially if the merging companies rely on incompatible or outdated technology. These issues can lead to inefficiencies, increased costs, and delays.


Example: The merger between America Online (AOL) and Time Warner in 2000 faced technical integration issues, as their infrastructures were incompatible. This led to a lengthy integration process and significantly reduced the anticipated synergies.


Mitigation: Assess technology compatibility as part of due diligence and allocate resources for potential integration challenges. Consider investing in a unified IT strategy early in the integration process to streamline operations.


Reference: Ellwood, S., & Garcia-Lorenzo, L. (2018). IT compatibility and merger performance. Journal of Business Research, 85, 243-252.


6. Regulatory and Antitrust Hurdles


Issue: Regulatory approvals can be delayed or denied due to antitrust concerns, particularly in industries where a merger may reduce competition or create monopolistic power. Regulatory scrutiny can impose additional requirements, leading to delays or even blocking a merger entirely.


Example: The proposed merger between AT&T and T-Mobile in 2011 was blocked by the U.S. Department of Justice over antitrust concerns, resulting in AT&T paying T-Mobile a substantial termination fee and missing out on potential synergies.


Mitigation: Engage legal experts early to evaluate the regulatory landscape and potential antitrust issues. Consider structuring the deal in a way that mitigates competitive concerns.


Reference: Department of Justice (2011). DOJ Statement on the AT&T and T-Mobile Merger. DOJ Press Release.


7. Cultural Impact on Customer and Community Relations


Issue: Local customers and communities may be apprehensive about mergers that disrupt familiar practices or perceived brand values. If the target company has a strong local brand identity, an acquisition by an outsider can create resistance or reputational risks.


Example: Kraft’s acquisition of Cadbury in 2010 faced backlash in the UK due to concerns about protecting the Cadbury brand and maintaining local manufacturing practices. The acquisition initially led to negative publicity and damaged Kraft’s reputation in the UK market.


Mitigation: Develop a public relations strategy that addresses community concerns and communicates the value of the acquisition to local stakeholders. Respect the acquired brand’s identity and maintain local operations if possible to preserve goodwill.


Reference: Thomson, S. (2011). Kraft’s Cadbury takeover: Lessons in stakeholder management. The Guardian.