Security During Mergers and Acquisitions: Protecting Deal Teams and Sensitive Information

M&A due diligence travel is a distinctive security challenge. Deal teams travel on tight schedules, carrying highly confidential information, to markets they may not know well, with a transaction that may attract interest from competitors, state actors, or individuals with a stake in the deal’s outcome.

This article covers the specific security risks that arise during M&A travel to high-risk markets and the framework for managing them.

Why M&A travel attracts security risk

Three factors combine to make M&A travel a distinct security concern:

The information value. A due diligence trip for a major transaction involves deal teams carrying laptops and devices with access to financial models, valuation analyses, draft term sheets, and data room materials. The commercial value of this information to a competitor, an insider trader, or a state actor is substantial. The consequence of information compromise during an M&A trip is not a data breach footnote – it can affect the deal itself, expose parties to liability, and in some cases have regulatory consequences.

The predictability. Due diligence schedules are structured and shared in advance with multiple parties at the target and among advisers. Unlike executive travel that can be varied, M&A trips often cannot be restructured without compromising the deal timeline. This predictability creates an opportunity for adversaries to plan.

The markets. M&A activity in Africa, Latin America, South-East Asia, and the Middle East requires travel to cities that carry elevated physical security risks. A due diligence trip to Lagos, Bogota, or Mumbai involves the same city risk environment as any other trip to those cities – but with a more attractive information target on board.

State-level intelligence risk

The FBI and GCHQ have both publicly identified the theft of M&A deal information as a priority target for foreign intelligence services, specifically naming Chinese state intelligence operations as targeting deal teams in Western legal and financial firms. The documented methodology includes digital intrusion (spear phishing targeting deal team members), physical approaches to obtain device access, and hotel room technical surveillance during due diligence visits.

This is not a risk reserved for defence or technology transactions. GCHQ’s 2023 commercial espionage advisory specifically noted that M&A deal information in sectors including energy, infrastructure, and financial services has been targeted. The advisory identified law firm and investment bank deal teams as the primary target, not just the companies involved in the transaction.

For transactions involving China, Russia, or other states with documented economic espionage programmes, the security protocol for due diligence travel should treat the operating environment as hostile from an information security perspective, regardless of the physical safety rating of the city.

Device compartmentalisation

The foundational control for M&A travel information security is device compartmentalisation. The operating principle: deal team members travel with a dedicated travel device that contains only the information needed for the specific trip.

What this means in practice:

• A clean laptop with no full data room access, no email with other deals or clients, no personal accounts
• A temporary email account or access via webmail with MFA for the trip’s communications
• VPN active for all network use, including hotel Wi-Fi
• Full device encryption enabled and verified before departure
• Remote wipe enabled and tested, with a designated person who can execute the wipe immediately if the device is lost or seized

The marginal inconvenience of a travel device is real. Deal teams under time pressure resist adding to their operational overhead. The justification is proportionate: the consequence of a full business laptop being seized, searched, or compromised in a hostile intelligence environment can affect the deal, expose clients, and create regulatory exposure.

Physical security for deal teams in P1 cities

The physical security requirement for M&A deal teams in P1 cities is the same as for any executive travelling to those cities: vetted ground transport is the minimum standard. In cities rated high or critical (Lagos, Bogota, Nairobi, Manila, Karachi, Jakarta), using unvetted taxis or rideshare for inter-city movement is an inappropriate risk.

Where the deal team includes senior executives with existing public profiles, or where the transaction itself may attract attention (a takeover in a politically sensitive sector, a deal opposed by local interests), dedicated close protection during the due diligence visit is appropriate.

The information security consideration should also inform accommodation choices. In high-risk markets, conducting sensitive meetings in hotel rooms without a prior TSCM check is an elevated risk. Where the budget and timeline allow, meeting rooms in the offices of known legal or banking counterparts provide better information security than hotel facilities.

Managing the schedule’s information perimeter

The due diligence schedule is known to multiple parties before the trip begins: the target company management, its advisers, the deal team’s lawyers and bankers and their operations teams. Each additional party that holds the schedule is an additional potential leak.

For sensitive transactions, limit the distribution of specific travel details (hotel, arrival times, movement plans) to the minimum necessary. The full itinerary does not need to be distributed to the entire adviser group. The hotel and room details need to be known by the deal security lead and the ground transport provider, not by twelve people on the distribution list for the due diligence agenda.

If a device is lost or seized

The response protocol for a lost or seized device must be established and documented before departure, not improvised after the incident.

The sequence: immediate notification to the deal security lead, immediate remote wipe of the device (a window that may be short if the device is in hostile hands), password reset for all accounts accessible from the device, a damage assessment (what data was on the device, what access it provided, what the exposure means for the transaction), and notification to the client in accordance with the security protocol.

In some jurisdictions, devices are seized at borders or by authorities in circumstances that make immediate wipe impossible. The pre-trip protocol should include a review of border practice in the destination country and a decision on whether to carry clean devices that have never accessed deal data, rather than wiped devices that may have residual traces accessible to forensic recovery.

For city-level security profiles for the principal M&A travel markets, see our pages on Mumbai, Lagos, Jakarta, and Bogota. For ground transport and executive protection services in these markets, see our security drivers and executive protection pages.

For the third-party due diligence framework that applies to joint venture partners and commercial counterparties in high-risk markets – covering beneficial ownership, PEP screening, FCPA and Bribery Act exposure, and sanctions compliance – see the security due diligence for business partnerships guide. For the specific security considerations when board members and NEDs are involved in a transaction – information access, device security, and travel risk – see our guide to security for board directors and NEDs. For the private equity and venture capital deal team context – due diligence travel to P1 cities, portfolio company security review, and hostile transaction environments – see our security for private equity deal teams guide. For professional services firms providing M&A advisory – including due diligence travel to P1 cities, client confidentiality targeting, and MNPI device security – see our security for professional services firms guide.