On April 7, 2026, Telefónica announced the sale of its Mexican operations to Melisa Acquisition, a vehicle led by the U.S. company OXIO and the fund Newfoundland Capital Management, for $450 million. The transaction includes all of the shares of Pegaso and Celular de Telefonía, the companies that operate the Movistar brand in the country. It is part of the Spanish group’s strategy to focus on its core markets and wind down its operations in Latin America. In late September, according to industry publications, the National Antitrust Commission approved the merger.
For U.S. investors evaluating opportunities in Mexico, this transaction is worth examining not so much for its price, but for what it reveals about a recurring challenge in cross-border M&A deals: the acquisition of a subsidiary that, until the transaction’s closing, has relied on its parent company to operate.
Telefónica México went up for sale after years of divesting its physical assets. It returned spectrum, sold its fiber-optic network and towers, and since 2019 has been providing service over AT&T’s network under a wholesale agreement in effect through 2030. What the buyer is acquiring is, in essence, a customer base of more than 20 million users, a portfolio of contracts, and the right to continue operating under a well-known brand.
This structure shifts the focus of the statutory audit. When a company’s value lies in its customer base and contractual relationships, the analysis focuses less on the state of its assets and more on whether those relationships will survive a change in ownership.
Change-of-Control Provisions
In a stock purchase, the acquired company retains its legal personality, its contracts, and its employees. Formally, the only thing that is transferred are the shares. Perhaps this is why the impact of change-of-control clauses is often underestimated; these clauses allow the other party to terminate or renegotiate a contract when control of the company changes hands.
In a business that operates on a third party’s network, the wholesale contract is likely the most important of all, and its continuity after closing is a condition precedent. Best practice is to identify these contracts during the due diligence process, obtain consent prior to closing, and, when that is not possible, reflect the risk in the price or as a condition precedent. The buyer has publicly stated that it will maintain the agreement with AT&T.
Something similar happens in the workplace. Since the employer does not change, the change in employer that typically accompanies a sale of assets does not occur. Even so, it is advisable to verify which of the subsidiary’s functions are actually performed by another entity within the group, because those functions do not transfer along with the shares.
Spinoff the subsidiary from the group
The most underestimated challenge in selling a subsidiary of a multinational group is its operational dependence on the parent company. Systems, software licenses, global contracts with suppliers, shared treasury, payroll, and compliance services—and, of course, the brand—are typically controlled by the group rather than the subsidiary. The day after the deal closes, the company must continue to operate.
For this period, there are transition services agreements, under which the seller agrees to continue providing certain services for a limited time and at an agreed-upon price while the buyer builds or migrates its own infrastructure. The wording of these agreements deserves more care than it usually receives. The scope of services, service levels, liability, the term (including extensions), and, above all, the exit plan are the areas where disputes arise after closing. In this case, the buyer announced the migration of users to its own cloud platform within approximately four months after obtaining the necessary authorizations. This makes the transition period a critical component of the transaction.
The brand raises a different issue. It has been reported that Movistar Mexico will retain its brand identity. Since the brand belongs to the Telefónica Group, its continued use after the closing must be based on an agreement with the brand owner. That agreement could be a temporary license with a rebranding timeline, or a longer-term license with well-defined quality controls and grounds for termination. The choice is a business one, but its consequences are legal.
Finally, migrating millions of users to a new technology platform requires a review of the privacy notices and contracts with those who will process that data on behalf of the company, in accordance with the Federal Law on the Protection of Personal Data Held by Private Parties.
Authorizations and the New Landscape for Foreign Investment
The transaction required authorization from the competition authority and the involvement of the telecommunications regulator. For future transactions in the sector, the requirements will become more stringent. On September 30, the Senate approved an amendment to the Foreign Investment Act that subjects acquisitions of more than 49% of the equity in companies operating in strategic sectors—including communications and businesses with access to personal data—to national security review. If that reform had been in effect, a transaction like this would likely have also required authorization from the National Commission on Foreign Investment, provided that the company exceeded the asset threshold, which has yet to be defined. This is an additional procedure that will need to be reflected in the timelines and risk allocation provisions of the purchase agreements.
The price of a divestiture is negotiated in a matter of weeks. Separating a subsidiary from its parent group takes months, and that is where the agreed-upon value is either preserved or lost. That is why the most important legal work often lies not in the purchase agreement itself, but in the surrounding documents: third-party consents, the transition services agreement, the trademark license, and the migration plan.
By Joaquín Vega Martínez, Founding Partner | Vega Guerrero
