Private Equity in Switzerland (2026): How Business‑law Changes and the Investment Screening Act Affect Deal Structuring

Switzerland private equity investment screening 2026 is now the single most consequential compliance topic for sponsors, in‑house counsel and cross‑border M&A teams evaluating Swiss targets. The Swiss Federal Assembly adopted the Investment Screening Act (ISA) on 19 December 2025, introducing the country’s first dedicated foreign direct investment review regime, primarily targeting acquisitions by foreign state investors in security‑critical sectors, with entry into force expected no earlier than 2027. Simultaneously, a package of Swiss business law changes 2026 took effect on 1 January 2026, reshaping warranty regimes, closing mechanics and corporate governance rules that directly affect purchase‑agreement drafting.

For private equity deal teams, the combined effect is clear: transactions signed or structured in 2026 must already account for an FDI screening framework that will soon be operational, while adapting to the corporate‑law reforms that are live today.

Executive Summary and Quick Take for PE Sponsors

Two parallel legislative tracks are converging on Swiss private equity practice. The first is the suite of corporate and commercial law amendments that entered into force on 1 January 2026, updating provisions on capital bands, board governance, and, critically for deal teams, the statutory framework governing representations, indemnities and signing‑to‑closing risk allocation. The second is the ISA, Switzerland’s answer to the EU’s Foreign Direct Investment Screening Regulation and the expanding FDI regimes in over 30 jurisdictions worldwide.

The ISA does not apply to every private equity buyer. Its primary focus is on foreign state investors, entities directly or indirectly controlled by a foreign government, seeking to acquire control of Swiss undertakings in designated critical sectors such as defence, energy, telecommunications, transport and certain advanced technologies. Industry observers expect, however, that the implementing regulations (still being developed) will define sectoral boundaries and notification procedures with greater precision, making early preparation essential even for non‑state sponsors whose portfolio companies may intersect with covered sectors.

For sponsors executing transactions during 2026, the practical imperative is to build ISA‑readiness into deal documentation now, rather than retrofitting protections once the regime enters into force. The checklist below summarises the six immediate steps every PE deal team should take.

• Map investor structure. Identify any direct or indirect foreign state links across the fund chain, including sovereign wealth fund co‑investors and limited partners.
• Conduct sector exposure analysis. Assess whether the target operates in, or supplies, critical infrastructure, defence, dual‑use technology, data centres, AI/semiconductors or telecommunications.
• Update SPA templates. Insert regulatory condition precedents, notification covenants, long‑stop extension mechanics and reverse break fees calibrated to FDI screening risk.
• Adjust warranty and indemnity regimes. Align representations with the 2026 business‑law amendments and add specific regulatory compliance warranties.
• Resize escrow and holdback provisions. Allow for potential delays arising from future ISA filings and enforcement actions.
• Engage Swiss regulatory counsel early. Commission a preliminary ISA risk assessment before signing any letter of intent for a Swiss target acquisition.

What Changed in Swiss Business Law on 1 January 2026: Practical Impact

The Swiss business law changes 2026 represent the final implementation phase of the broader corporate‑law modernisation programme that Switzerland has pursued since the revised Swiss Code of Obligations provisions on company law came into effect in stages from 2023 onwards. The 2026 tranche consolidated several amendments relevant to M&A and private equity deal structuring Switzerland, affecting how purchase agreements are drafted, how warranties are scoped, and how closing conditions interact with statutory board duties.

Amendments Affecting Warranties and Indemnities

The 2026 amendments refined the statutory provisions on shareholder information rights, board reporting obligations and the content of annual financial statements. For PE buyers, the practical consequence is that warranty schedules must now be calibrated to a more detailed statutory disclosure baseline. Sellers can rely on broader statutory information rights to argue constructive knowledge by the buyer, making the negotiation of “disclosed information” baskets and pro‑sandbagging clauses more commercially significant than before.

Deal teams should review warranty language against the updated provisions and consider including explicit carve‑outs that preserve the buyer’s right to claim under warranties regardless of matters discoverable through statutory information rights. Model drafting note: add a clause stating that the buyer’s rights under the warranties are not limited by any information that was or could have been available through the exercise of statutory shareholder information rights under the Swiss Code of Obligations, as amended.

Timing and Closing Mechanics Changes

Provisions governing capital bands (Kapitalband) and simplified capital increases now offer greater flexibility for post‑closing restructurings and earn‑out settlement. PE sponsors can leverage the capital band mechanism, which allows the board to increase or decrease share capital within a pre‑defined range without a new shareholder resolution, to structure deferred consideration or management incentive equity more efficiently. Closing conditions tied to shareholder approvals for capital changes may be streamlined accordingly, reducing the execution risk between signing and closing.

Additionally, the refined rules on interim dividends and liquidity tests affect how buyers structure pre‑closing dividend recapitalisations and acquisition financing arrangements. Counsel should verify that closing‑condition language references the correct statutory provisions as amended from 1 January 2026.

The Investment Screening Act (ISA): Scope, Timeline and Legal Test

The Investment Screening Act Switzerland represents a landmark shift. For decades, Switzerland maintained one of the most open investment regimes among OECD economies. The ISA, adopted by the Federal Assembly on 19 December 2025, introduces a targeted review mechanism without abandoning Switzerland’s fundamental commitment to openness. The Federal Council had adopted the dispatch on the ISA on 15 December 2023, after extensive consultation and a detailed assessment of comparable regimes across the EU, the United States, the United Kingdom and Australia.

Legal Tests: Control, Public Order and Security

The ISA’s substantive test centres on whether an acquisition by a foreign state investor of control over a Swiss undertaking in a designated critical sector could endanger public order or security. This dual threshold, investor identity and sectoral sensitivity, deliberately narrows the scope compared to broader screening regimes (such as Germany’s AWV or France’s decree‑based system) that apply to all foreign investors in certain sectors. Early indications suggest the implementing regulations will define “control” broadly, capturing not only majority acquisitions but also the acquisition of a blocking minority or de facto strategic influence through board seats, veto rights or contractual arrangements.

Who Is a “Foreign State Investor”?

The ISA defines a foreign state investor as any entity that is directly or indirectly controlled by a foreign government. This includes sovereign wealth funds, state‑owned enterprises, and any entity in which a foreign government exercises dominant influence, whether through equity ownership, voting rights, board composition or contractual control. Critically, this definition can extend through multi‑layered fund structures: a PE fund in which a sovereign wealth fund holds a controlling or dominant LP position could, depending on the implementing regulations, be classified as a foreign state investor.

Private PE funds with no foreign state links fall outside the primary scope, though the likely practical effect will be heightened diligence requirements across the board as targets and advisers seek assurance on investor identity.

Which PE Transactions Are Likely to Trigger Investment Screening 2026 and Beyond?

Understanding which transactions fall within the ISA’s reach is essential for every PE sponsor evaluating a Swiss target. The regime is designed to be targeted rather than comprehensive, but its interaction with existing Swiss regulatory frameworks, including competition law, Lex Koller and sector‑specific licensing, creates a layered compliance landscape that deal teams must navigate carefully.

Sectoral Triggers: Critical Infrastructure and Beyond

The ISA identifies several critical sectors in which foreign direct investment screening Switzerland will apply. Industry observers expect the implementing regulations to refine the following categories: defence and armaments; energy supply and critical energy infrastructure; telecommunications and data centre operations; transport infrastructure; critical technologies including AI, semiconductors and quantum computing; and, potentially, financial market infrastructure. Transactions involving targets that supply goods or services to these sectors, even if the target itself is not a primary operator, may also attract scrutiny depending on the degree of dependency and substitutability.

Thresholds, Examples and Practical Boundaries

The ISA is triggered by the acquisition of “control” by a foreign state investor. Industry commentary suggests this will capture majority share acquisitions, the acquisition of a significant minority stake conferring veto or blocking rights, and indirect acquisitions through holding structures. Private PE funds, those without foreign state links, are generally outside the primary scope of the ISA. However, practitioners should note that co‑investment arrangements with sovereign wealth funds, state‑backed credit facilities, or GP structures with significant state capital may bring an otherwise private fund within the definition.

Deal‑Structuring Implications for Switzerland Private Equity Investment Screening 2026

The convergence of the ISA and the 2026 business‑law amendments demands a re‑examination of standard PE deal structures. Sponsors can no longer rely on template documentation developed under Switzerland’s previously screening‑free regime. The sections below address the key structural, contractual and procedural adjustments that private equity deal structuring Switzerland now requires.

Pre‑Emptive Structuring: Holdco Layers and Blocker Entities

For funds with potential foreign state investor exposure, whether through LP commitments, co‑investment sidecars or GP capital, structuring the acquisition vehicle becomes a critical early decision. Interposing a domestic Swiss holding company may not, by itself, insulate the transaction from ISA review if the ultimate beneficial owner remains a foreign state entity. Industry observers expect the implementing regulations to adopt a look‑through approach consistent with international best practice.

Alternatively, sponsors may consider blocker structures that ring‑fence state capital from the acquiring entity, ensuring that no single foreign state investor holds a controlling or dominant position in the vehicle that acquires the Swiss target. This approach requires careful documentation of capital commitments, voting arrangements and governance structures at the fund level, documentation that should be prepared well in advance of any filing obligation.

Representations and Warranties Adjustments

Purchase agreements for 2026 Swiss transactions should include an expanded set of representations addressing both the ISA and the updated corporate law provisions. Key additions include:

• Regulatory status representations. The buyer represents that it is not a foreign state investor within the meaning of the ISA, or alternatively, that it has made all required filings.
• Sector exposure warranties. The seller warrants the target’s operations, contracts and licences by reference to the ISA’s designated critical sectors.
• Compliance history. Both parties warrant compliance with applicable Swiss regulatory requirements, including the 2026 Code of Obligations amendments.
• Data and technology warranties. For targets handling sensitive data or dual‑use technology, specific warranties on data‑processing arrangements, export control compliance and third‑country access restrictions.

Contingency Planning: Walk‑Aways and Long‑Stop Dates

Where a transaction may require ISA clearance (once the regime enters into force) or where the parties wish to future‑proof a 2026 agreement against regulatory risk, the long‑stop date and walk‑away mechanics become critical. Standard six‑month long‑stop periods may prove insufficient if ISA review timelines mirror those of comparable European regimes, where statutory review periods of 60 to 120 business days are common. Deal teams should build in automatic extension mechanisms tied to the regulatory review process, coupled with reverse break fees to compensate sellers for extended exclusivity and opportunity cost.

Sample clause, long‑stop extension: “In the event that any regulatory filing or notification required under the Investment Screening Act (or any implementing regulation thereof) remains pending at the initial long‑stop date, the long‑stop date shall automatically extend by 90 calendar days, provided that neither party shall be obliged to accept an extension beyond [date].”

FDI Due‑Diligence and Compliance Checklist

Every Swiss PE transaction in 2026 should incorporate a dedicated FDI due diligence Switzerland workstream alongside traditional legal, financial and tax diligence. The checklist below is designed for deal teams and can be adapted as a downloadable working document.

Target‑Level Diligence

• Business‑line mapping. Identify all business lines, products and services against the ISA’s designated critical sectors.
• Government contracts and dependencies. Review all contracts with Swiss or foreign government entities, including defence procurement, infrastructure concessions and regulated utility supply.
• Data exposure assessment. Catalogue data‑processing activities involving classified, security‑sensitive or large‑scale personal data of Swiss residents.
• Technology classification. Determine whether the target develops, produces or supplies dual‑use goods, controlled technology or items subject to Swiss export control.
• Foreign state ties at target level. Identify any existing foreign state shareholders, directors or contractual relationships that could compound regulatory scrutiny.

Investor‑Level Diligence

• Beneficial ownership analysis. Trace the full ownership chain of the acquisition vehicle to identify any foreign state investor within the meaning of the ISA.
• LP and co‑investor screening. Review the fund’s investor base for sovereign wealth funds, state pension funds, government‑controlled entities and state‑backed financial institutions.
• Financing source review. Assess acquisition financing for state‑linked credit facilities, export credit support or government‑guaranteed loans.

Contract Drafting Recommendations and Sample Clauses

Beyond the structural adjustments discussed above, the contractual architecture of every Swiss PE transaction in 2026 should be updated to address the combined impact of the ISA and the business‑law amendments. The following six clauses represent the minimum drafting toolkit for an M&A checklist Switzerland 2026 adapted to the new regulatory environment.

• Notification covenant. “The Buyer shall, promptly following signing, prepare and submit (or procure the submission of) all filings, notifications and applications required under the Investment Screening Act and any implementing regulations in connection with the Transaction, and shall use all reasonable endeavours to obtain clearance within the regulatory review period.”
• Regulatory condition precedent. “Completion shall be conditional upon (i) clearance or deemed clearance under the ISA, (ii) expiry of all applicable waiting periods without an intervention order, and (iii) confirmation that no conditions have been attached to any clearance that would constitute a Material Adverse Effect.”
• Long‑stop extension. “If any regulatory review under the ISA remains pending at the Initial Long‑Stop Date, the Long‑Stop Date shall automatically extend by 90 calendar days. Either party may terminate this Agreement if clearance has not been obtained by the Extended Long‑Stop Date.”
• Termination right on adverse regulatory decision. “If the competent authority prohibits the Transaction or imposes conditions that would constitute a Material Adverse Effect, either party may terminate this Agreement by written notice, and the Reverse Break Fee shall become payable by the Buyer within 10 business days.”
• Escrow release triggers. “The Escrow Amount shall be released to the Seller upon the later of (i) 30 business days following Completion, and (ii) confirmation of ISA clearance or deemed clearance, provided that no claim notice has been served.”
• Seller cooperation covenant. “The Seller shall cooperate fully with the Buyer in connection with any ISA filing, including by providing information, documents and access to personnel reasonably requested by the Buyer or the competent authority, at the Buyer’s cost.”

Each clause should be tailored to the specific transaction, taking account of the target’s sector exposure, the buyer’s investor‑structure profile and the anticipated ISA implementing regulations. Given that the ISA is not yet in force, practitioners should include transitional language that activates these provisions if and when the regime becomes operational during the life of the transaction or any earn‑out or deferred consideration period.

Closing Mechanics, Timeline Management and Remedies

Timeline management is among the most significant practical challenges introduced by the ISA for Swiss PE transactions. Where a filing is required (once the regime is live), sponsors should anticipate a minimum review period of several months, based on comparable European regimes. The likely practical effect will be that signing‑to‑closing timelines extend by 60 to 120 days for transactions involving foreign state investors in critical sectors.

During the interim period between signing and closing, governance provisions in the SPA should ensure that the target continues to be operated in the ordinary course, with appropriate information barriers and pre‑closing covenants protecting against value leakage. Sponsors should also consider whether escrow and holdback mechanics need to be resized to reflect the risk that a post‑closing enforcement action, including, potentially, a divestment obligation, could follow if clearance is not obtained.

On the question of whether a deal closed without clearance can be unwound, the ISA provides for remedies and sanctions. The government has signalled proportionate enforcement measures. Industry observers expect that these may include fines, suspension of voting rights and, in extreme cases, mandatory divestment, mirroring the remedial framework seen in comparable Swiss regulatory statutes. Including protective clauses (reverse break fees, termination rights, escrow mechanisms) in the SPA is the most effective way to manage this risk.

Lex Koller Considerations for PE Portfolios

The Federal Act on the Acquisition of Real Estate by Persons Abroad (Lex Koller) remains in force alongside the ISA and applies to any acquisition of Swiss real estate, or shares in a company whose primary purpose is the holding of Swiss real estate, by foreign persons. PE funds structured as foreign entities must assess Lex Koller restrictions independently of the ISA, particularly where portfolio companies hold Swiss commercial or residential property. The interaction between Lex Koller approvals and potential ISA filings may create parallel regulatory workstreams that must be coordinated to avoid closing delays.

Conclusion: Recommended Next Steps for Private Equity Sponsors

The landscape of Switzerland private equity investment screening 2026 is defined by two concurrent forces: live corporate‑law reforms that demand immediate contract‑drafting updates, and an adopted but not yet operational FDI regime that requires forward‑looking deal planning. Sponsors who treat the ISA as a future concern rather than a present structuring requirement risk being caught by implementing regulations that take effect faster than anticipated.

The recommended course of action is clear. First, update all SPA templates and due‑diligence protocols to reflect the 2026 business‑law amendments and incorporate ISA‑readiness provisions. Second, conduct investor‑structure and sector‑exposure analyses at the earliest stage of every new Swiss deal. Third, engage experienced Swiss regulatory counsel to map the transaction against the ISA’s scope and prepare filing strategies. Fourth, monitor the development of implementing regulations through SECO publications and government announcements. For deal teams seeking specialist guidance, the Global Law Experts lawyer directory provides access to qualified Swiss private equity practitioners who can advise on compliance strategy and transaction structuring under the new regime.

Sources

1. SECO, Investment Screening (Official Regulator Guidance)
2. admin.ch, Federal Council Dispatch / News Item on ISA
3. PwC Switzerland, Swiss Investment Screening Act
4. CMS, Switzerland to Introduce an Investment Screening Act
5. IFLR, M&A Guide 2026: Switzerland
6. White & Case, Foreign Direct Investment Reviews 2026: Switzerland
7. ICLG, Private Equity Laws and Regulations: Switzerland
8. Mondaq, M&A Guide 2026: Switzerland