September 1, 2026
Executive takeaway Proposed amendments to Mexico’s Foreign Investment Law (FIL) would introduce a new pre-closing national-security screening regime for foreign investment. Certain investments resulting in foreign participation above 49% in Mexican companies operating in sensitive sectors and exceeding an asset threshold to be determined by the National Foreign Investment Commission (CNIE) would require prior clearance. The CNIE would be empowered to clear, condition or prohibit covered transactions on national-security grounds, adding a new regulatory layer to cross-border deals involving Mexico.[1]
What changes?
Mexico already has a national-security provision in the Foreign Investment Law, but it has never operated as a fully articulated screening system. Current Article 30 allows the CNIE to prevent acquisitions by foreign investment for national-security reasons. The Initiative expressly recognizes that the current law lacks parameters and guidelines for exercising that authority. The proposal would repeal Article 30 and replace it with a dedicated Part governing national-security review.
The result would be a distinct regulatory track. Traditional FIL authorizations would continue to address foreign-investment admission and ownership restrictions, while the new Part Six Bis would introduce a separate assessment of risks or threats to national security.
When would a filing be mandatory?
Under the proposed amendments, prior CNIE approval would be required if all three of the following conditions are met:
- The foreign investor would hold, directly or indirectly, more than 49% of the share capital of a Mexican company;
- The Mexican target’s total assets exceed a threshold to be established by the CNIE through a general resolution;[2] and
- The target operates in a listed sensitive sector or activity.
Sensitive sectors and activities
The Initiative identifies a broad range of sectors and activities subject to national-security screening, as summarized below. The list is not exhaustive, as the CNIE would also be authorized to designate additional analogous or similar economic activities or sectors by general resolution.
| Category | Examples expressly covered |
| Strategic infrastructure | Energy, transport, healthcare, communications, mining, data processing/storage, digital systems, aerospace, defense and sensitive facilities. |
| Critical technologies / dual use | AI, robotics, semiconductors, cybersecurity, aerospace/defense technologies, energy storage, quantum, nuclear, nanotechnology and biotechnology. |
| Critical inputs | Energy, raw materials and food security. |
| Sensitive information | Access to sensitive information, particularly personal data, or the ability to control it. |
| Other activities | Analogous or similar activities or sectors later designated by the CNIE through general resolution. |
Voluntary filing.
If the foreign investment exceeds 49% but the target falls below the applicable asset threshold, the parties may nevertheless file voluntarily. The Initiative does not establish a safe harbor for transactions that are not voluntarily filed, an issue that will require further clarification through the legislative process or implementing rules.
Filing mechanics and review timetable
| Step | Proposed rule |
| Who files? | The Mexican company and the foreign investor must file jointly with the CNIE’s Technical Secretariat. |
| Initial review period | 60 business days from filing. |
| Information request | The CNIE may suspend the review once to request additional information or documents. |
| Timing of request | The request must be issued within 20 business days after filing. |
| Response period | The CNIE sets a period of 5 to 30 business days. Failure to respond results in dismissal of the filing. |
| Restart | The review clock resumes on the business day after the requested information has been submitted in full. |
| Complexity extension | The CNIE may extend the review once, for up to 30 additional business days, if complexity justifies it; the extension must be reasoned. |
| No deemed approval | If the applicable periods expire without a decision, the application is deemed denied. The ordinary FIL affirmative-silence rule would not apply. |
What can the CNIE decide?
The proposed regime provides three outcomes:
- Clearance: no national-security risk or threat is identified and the acquisition is declared viable;
- Mitigation: the transaction must be modified to address the identified risk; or
- Prohibition: the acquisition is prevented on national-security grounds.
Mitigation will be an important feature of the proposed regime. The Initiative would allow the CNIE to require transaction-specific modifications to mitigate identified national-security risks and to impose case-specific terms and conditions, which may include periodic reporting and compliance monitoring. The Initiative does not prescribe a closed list of mitigation measures, potentially giving the CNIE significant flexibility in shaping remedies on a case-by-case basis.
Institutional redesign of the CNIE
The bill would materially change the institutional profile of the CNIE for national-security matters. Secretaries of Defense, Navy, and Security and Citizen Protection would become voting members of the Commission. For national-security sessions, the Attorney General’s Office, National Intelligence Center, Tax Administration Service and Financial Intelligence Unit would become permanent invitees with voice but no vote.
Why this matters for foreign investors
The proposed process is designed as an inter-agency national-security review, not simply an economic authorization administered by the Ministry of Economy. Investors should expect diligence to extend beyond ownership percentages and financial information into areas such as sensitive technology, data, infrastructure, supply dependencies and security-related risk
Mitigation and enforcement risk
The Initiative creates two distinct sanctions for national-security screening violations, separate from the pre-existing general penalty for carrying out an act that requires CNIE approval without first obtaining such approval:
- Prohibited or unapproved equity transfer. If the Mexican company transfers, assigns, delivers or otherwise conveys the equity interest to the foreign investor after the CNIE has denied authorization or before the required favorable resolution has been obtained, a fine ranging from 5,000 to 200,000 daily UMAs[3] may be imposed. At the 2026 daily UMA of MXN 117.31, this corresponds to approximately MXN 586,550 to MXN 23.46 million (USD 34,400 to USD 1.38 million, based on an approximate exchange rate of MXN 17.04/USD as of August 31, 2026).
- Breach of mitigation measures. Failure to comply with risk-mitigation measures imposed by the CNIE is subject to a separate fine within the same range of 5,000 to 200,000 daily UMAs (approximately MXN 586,550 to MXN 23.46 million / USD 34,400 to USD 1.38 million).
- Failure to obtain a required CNIE approval. Separately, the pre-existing general sanction for carrying out an act requiring CNIE approval without first obtaining such approval would be 1,000 to 5,000 daily UMAs (approximately MXN 117,310 to MXN 586,550 / USD 6,900 to USD 34,400).
What foreign investors and deal teams should do now
- Add Mexico to global FDI-screening analyses for transactions involving sensitive Mexican assets, and assess the issue in parallel with merger control and sector approvals.
- Map ultimate ownership and control early, including indirect structures, state-linked interests and investor rights that may become relevant in the CNIE review.
- Identify sensitive technology, data, infrastructure, critical inputs and real estate during regulatory diligence – not only the target’s formal industry.
- Address Mexican FDI approval expressly in transaction documents, including conditions precedent, cooperation covenants, mitigation risk allocation and long-stop dates.
- For multi-jurisdictional transactions, align the Mexican filing narrative with CFIUS, EU/UK and other foreign-investment submissions to avoid inconsistencies in ownership, technology, data and government-relationship descriptions.
Conclusions
If enacted substantially as proposed, the reform would introduce a new pre-closing regulatory consideration for cross-border transactions involving Mexico. Foreign investors and transaction parties would need to assess the potential application of the FDI screening regime early in the deal process and coordinate it with existing merger control, foreign investment and sector-specific approvals. While the proposed framework reflects features commonly found in international FDI screening regimes (including sensitive-sector review, inter-agency involvement, mitigation measures and prohibition powers) its jurisdictional thresholds and review process are specific to Mexico. Transactions involving sensitive sectors should therefore be assessed independently under the Mexican framework rather than relying solely on the outcome of CFIUS, UK NSIA or EU FDI screening analyses.
Basham, Ringe and Correa has a highly specialized Antitrust and Foreign Investment team with significant experience in the public and private sector. We advise domestic and international clients on the regulatory aspects of cross-border transactions in Mexico, including foreign investment and merger control assessments, regulatory filings and approvals, risk analysis, transaction structuring and strategic engagement with the relevant authorities. Our multidisciplinary approach allows us to provide coordinated advice across antitrust, foreign investment and sector-specific regulatory requirements.
Amílcar Peredo, Partner,
Gustavo González, Senior Associate
León Jiménez, Senior Associate
Patricia Carrión, Senior Associate
[1] Based on the Presidential Initiative submitted to the Mexican Senate on August 30, 2026. Available at: https://infosen.senado.gob.mx/sgsp/gaceta/66/2/2026-08-30-1/assets/documentos/Inicitiva_SEGOB_Ley_Inversi%C3%B3n_Extranjera.pdf
[2] The asset threshold is not yet known. The Initiative requires the CNIE to issue and publish it in the Federal Official Gazette within 180 calendar days after publication of the decree.
[3] Unidad de Medida y Actualización (UMA), using its Spanish acronym.