Is the famed “Swiss Verein” model of governance and economics losing favour amongst multi-jurisdictional law firms? Recent strategic decisions by some of the world’s largest law firms suggest that this might be so.
DLA Piper dissolves its verein
In March 2026, DLA Piper voted to dissolve its verein and move to a single LLP structure. Herbert Smith Freehills Kramer chose financial integration when it formed its transatlantic combination, as did Ashurst Perkins Coie, as did A&O Shearman. Taylor Wessing, previously the cornerstone of the Verein it established across Europe, is in the process of withdrawing from that so the firm can merge with Winston & Strawn, reportedly using a one-firm model. For much of the 2010s, the Swiss Verein was the preferred structure for large cross-border law firm combinations. Have things changed?
At first glance, the Swiss Verein has always seemed an unusual structure for a law firm. Originally designed for clubs and similar associations, it allows them legal persona so that they could open bank accounts, enter contracts and own assets. It is also used by large organisations such as WWF (World Wildlife Fund) and FIFA (Fédération Internationale de Football Association.) Baker McKenzie was the first law firm to adopt the structure, in 2004. Over the years, roughly a dozen large international law firms followed suit. Gowling WLG, Eversheds Sutherland and CMS have also built dispersed governance and economic models, analogous to the Swiss Verein, in the form of English companies limited by guarantee.
The dispersed model solved several practical problems in mergers, at a time when many large law firms were aggressively chasing scale and global expansion. It meant that law firms could combine without equalising partner profits. They could at least partially ring-fence professional liability. They could work around idiosyncratic local bar rules. They could also avoid the difficult partner-by-partner negotiations that a true merger requires. They did not even have to integrate their technologies or data, if they chose not to. In some cases, the “mergers” were little more than common branding exercises wrapped in some sort of referral fee arrangement.
Today, those advantages are significantly less compelling. Globalisation is no longer the driving force that it used to be. More importantly, a new driver has emerged that tips the balance back to one-firm firm models. That is, generative (and now also agentic) AI.
To sustain competitive advantage in a world increasingly dominated by AI, law firms must effectively organise, pool and use their data at firm-wide scale. That includes a very diverse range of client relationship data, matter histories, precedents, know-how, negotiation positions and work product. A single integrated firm can treat its data as a common asset. A firm with a verein or similar dispersed model frequently cannot. Without it, the firm’s systems are deprived of the very essence of what has become necessary to build sustainable competitive advantage.
The 2026 wave
DLA Piper’s vote was overwhelmingly in favour of ditching the verein. Frank Ryan, the firm’s global chair, said the verein had meant that DLA Piper “had never had a single leadership team that together drives the strategic direction of the firm“. The new structure places a global holding entity above the US and International LLPs. It is intended to align strategy, leadership and partner incentives. Very interestingly, DLA Piper took this decision from a position of strength. Legal Business ranks its 2025 profits per equity partner (PEP) at £2.7 million, ahead of all the other London heavyweights except Slaughter and May, and Macfarlanes. The firm is also growing and recruiting actively from elite US firms. In a world where “don’t try to fix something if it ain’t broke” is a common approach, their leadership chose to think strategically and with a focus on the future.
Other large verein firms are also evolving. Norton Rose Fulbright announced partial integration of its EMEA and Australian profit pools in July 2025 and separated from its South African member firm. It reduced its member firms from five to three (US, EMEAPAC, and Canada). Co-global Managing Partner Peter Scott has stated categorically that the firm is not abandoning their verein, though. King & Wood Mallesons’ Chinese and Australian firms parted company in March 2026, the collapse of former SJ Berwin’s European arm in 2017 being arguably a precursor to this. Dentons fell from fifth to thirteenth in the global revenue rankings after its separation from Dacheng in 2023. I recall advising a Beijing-based law firm some years ago and discussing the global law firms with their managing partner. When I mentioned Dacheng Dentons, my client looked quizzical. “I know Dacheng,” he said, “but who are Dentons?“
I find it disconcerting that some law firm advisors still breathlessly promote the verein construct, citing its traditional benefits while underplaying (or entirely ignoring) the structural problems now clearly visible among the largest firms that adopted it. As frequently happens, implementation advice lags behind the evidence. In my opinion, the shift from the verein to one-firm firm models is structural, not incidental or cyclical.
What the verein delivered
To recap, vereins delivered several important benefits. Firms could:
- combine without aligning partner profitability
- limit cross-border professional liability
- accommodate idiosyncratic local bar rules
- avoid difficult economic negotiations a full merger would require
- gloss over cultural differences
- quickly conclude post-merger integration and move on.
These benefits have weakened and, in some cases, uncovered fault lines and worse. Profit-pool independence was always a mixed blessing. In the absence of offsetting referral arrangements, partners referring work to colleagues in another profit pool reduces profit in their own pool. The weaker internal collaboration caused damages client service and experience. Clients do not care about profit pools or other internal arrangements. They expect a firm to deploy the best people for the work, on their matter. That is less likely to happen.
Liability ring-fencing has also become less reliable. The 2015 Gap/RevoLaze malpractice ruling against Dentons US and the accompanying $32 million fine is evidence of that. (In this dispute, Dentons member firms found themselves acting for both plaintiff and respondent. The Court ruled that Dentons could not present itself to clients as one global firm, while also claiming to be separate firms when conflict rules became inconvenient.)
Also, the verein never really solved brand inconsistency. A shared name does not create a shared culture. It does not automatically deliver shared clients, shared knowledge or common standards and values. Without financial integration, cultural glue is weaker, and without that glue, brand integration and firm-wide partner and employee engagement is hard to achieve.
The AI problem
Generative AI is fundamentally transforming the strategic value of a law firm’s data. Until recently, law firm data mainly supported billing, conflicts, records management, compliance and knowledge retrieval. In most firms, data still remains fragmented, poorly tagged and hard to use. While that could be tolerated before, this is no longer true. Properly organised data is now a key source of sustainable competitive advantage. Matter histories, precedent libraries, client preferences, negotiation records, regulatory advice and firm know-how are all fuel for AI systems. The better the data, the better the firm’s ability to automate, advise, price and deliver work. The better the firm’s most senior lawyers are able to leverage that data to amplify their domain knowledge and judgement. Their wisdom.
In 2026, a firm with deep, well-organised data might easily build a stronger AI position than a larger firm with more lawyers but weaker data. Data quality then matters more than headcount. As previously noted, vereins make that difficult. Member firms are separate legal entities. They might be subject to different data-protection regimes, professional secrecy rules, confidentiality obligations and client-consent requirements. Even if no legal impediments exist, cultural obstacles to data sharing and collaboration can be insurmountable – especially if the Verein’s member firms are competitive with each other, which is more frequent than some admit.
As a practical consequence, a verein firm’s AI adoption might be capped at member-firm level. Likewise investment in AI tools. Each member firm builds its own data substrate, on its own systems, under its own legal regime. Yet those member firms compete daily with rivals who have built one single strategy and accompanying system/s, firm-wide. The gap, wide from the outset, compounds over time. As AI systems improve (and improvement is now exponential) competitive advantage shifts to firms that can feed them more and better-quality firm-wide data. A verein might spend heavily on AI across its network yet still fail to capture the full benefit. What was a legacy organisational weakness has evolved into an existential strategic constraint.
The one-firm answer
In 1985, David Maister published an article in the MIT Sloan Management Review titled “The One-Firm Firm: What Makes It Successful“. In it, he demonstrated how across multiple professions, professional service firms create advantage through firm-wide coordination, shared identity, common decision-making, teamwork and institutional commitment.
“The characteristics of the one-firm firm system are institutional loyalty and group effort. In contrast to many of their (often successful) competitors who emphasize individual entrepreneurialism, autonomous profit centers, internal competition and/or highly decentralized, independent activities, one-firm firms place great emphasis on firmwide coordination of decision making, group identity, cooperative teamwork, and institutional commitment.”
Those features mattered before AI. They matter still more now. Given the importance of tackling AI adoption systematically and firm-wide, it is time to go back to basics.
A single profit pool aligns incentives across borders. A shared strategy allows the firm to make build consensus and make investment decisions that benefit the whole, not member firms individually. Integrated systems make data easier to organise and deploy. A single leadership team can make decisions to pivot if needed, more nimbly than a dispersed committee. A shared culture makes collaboration natural and fosters firm-wide loyalty and engagement.
Most importantly in today’s world, it enables the firm to build one integrated, powerful body of knowledge – not several disparate and unconnected ones. With better data to work with, better context in which to act, and more consistent standards across the business, it enables the firm to build digital assets that less integrated rivals find hard to emulate. That yield true sustainable competitive advantage. Over time, the compounding effect means that the firm learns faster, serves clients better, delivers stronger economic performance and builds an entity that its partners can be proud of.
Strategic choices, including for mergers
Given the above, firms considering cross-jurisdictional mergers would be wise not to be beguiled by apparent ease of short-term execution, that vereins promise. Lighter-touch, possibly cheaper and quicker post-merger integration will likely cause fault lines that, in an AI-enabled world, could be existential. They should not be fooled by old assumptions. Headcount scale is no longer the primary revenue driver. AI-enabled digital systems are.
Merger diligence must now go well beyond strategic alignment, culture, economics and client overlap. It must also examine data maturity and organisation. How clean is the other firm’s matter data? How accessible is its know-how and other knowledge? What value will the other firm’s digital assets add to your own? Two firms with incompatible data systems might prove harder to combine than two firms with radically different cultures. Caveat emptor!
For firms already inside vereins, strategic choices are narrowing. They can convert to a fully integrated firm. They can integrate selectively, as Norton Rose Fulbright reports it is doing. The status quo is likely already untenable, even if that is not fully visible. If so, maintaining a heavily dispersed model will become more expensive and less competitive as AI advances. In a world where headcount drove revenue, Swiss Vereins helped firms build global brands and networks quickly through serial mergers across multiple jurisdictions. They reduced some liability risks and helped navigate regulatory diversity. Those days are likely gone.
Vereins were not always the wrong choice. It is just that the conditions that made them useful have changed.
