Confidential lateral moves: how partners manage process risk.

Most lawyers exploring a move worry about the obvious leak: a CV on a work laptop, a public Open-to-Work banner, a recruiter who talks too widely. Those are real, and they are covered in our confidential job-search playbook. They are not the partner problem.

A partner lateral has to put information into someone else’s building before a deal exists. Conflicts cannot be cleared without some picture of the persons and issues in the book. A hiring committee cannot underwrite a floor without an LPQ. A partnership vote cannot happen in a room of one. Each of those steps is legitimate. Each is also a leak surface. The professional rules tell you how much may move, and when. They do not run the process for you. Confidentiality is a sequence you can verify, not a reassurance you take on faith.

The market around that process is busy. NALP’s 2025 survey of 305 US offices recorded 3,535 lateral lawyers, total volume up 16.4%, partner hiring up 17.8%, with partners 22.3% of the mix. Firm Prospects’ Am Law 200 tape put partner hires at 3,009 in 2025, about 10% above 2024. Treat those as heat, not as a reason to rush the sequence. The same literature still finds that a large share of laterals then disappoint: Decipher’s public compilation, 48% gone in five years and 62% missing the promised book; ABA Law Practice (July–August 2025), only about 70% of a stated book follows, with further drop-off over the next 18 months; Thomson Reuters Institute’s 2026 State of the US Legal Market, fewer than one-third of laterals bring both the entire book and the team. A process that becomes public before resignation simply hands those odds to the current firm.

This is not legal, tax or financial advice. The ethics opinions and partnership-deed mechanics cited below are public rules and typical market practice. What your own deed, regulator and facts require is a question for counsel.

Three US opinions do most of the work, and they are easy to flatten into one slogan. They are not one slogan. Opinion 09-455 (October 2009) is about what you may tell the new firm so it can detect conflicts. Opinions 99-414 (1999) and 489 (December 2019) are about what you and the old firm must tell clients once a departure is real. Rule 1.6 sits under all three: client information stays confidential, with a narrow 1.6(b)(7) exception for detecting and resolving conflicts arising from a change of employment, and only where the disclosure would not prejudice a client. England and Wales has a parallel confidentiality duty in SRA Code paragraph 6.3, without a merger-style carve-out for an individual or team move (CM Murray, 2025).

Conflicts information is not a marketing deck

Opinion 09-455 is explicit that disclosure of conflicts information is ordinarily permissible, subject to limits: no greater than reasonably necessary; must not compromise privilege or prejudice a client; the receiving firm may not use it for any other purpose; dissemination should be restricted to the people assigned to the conflicts analysis. Disclosure normally should not occur until the moving lawyer and the prospective new firm have engaged in substantive discussions. Texas Ethics Opinion 607 (2011) goes further: the other material issues of the association should already have been resolved, the information should move under a confidentiality agreement, and it should be no more extensive than necessary. The practical translation is ugly and useful. An anonymized list of sectors, counterparties and matter types is the first pass. Named clients are the second. They go to conflicts counsel. They do not go to the partner who sits across from your biggest client at the current firm.

Client notice is not a portability test

Opinion 489 restates a point firms still argue with in partnership deeds: clients decide who represents them. Notice periods the current firm imposes should be the minimum necessary, under the circumstances, for clients to choose, files to be assembled, staffing to be adjusted, and firm property to be secured. The firm may not restrict the departing lawyer’s access to the resources needed to represent those clients during the notice window, and should not displace the departing lawyer on live matters without client direction. A joint notice is the cleaner instrument. Opinion 99-414 set the three options the client must hear: the departing lawyer, the firm, or someone else. Law Practice Today (December 2025) restates the same sequence for a 2025–26 audience: follow the ethics rules over firm policy where they conflict, and do not use a non-compete — Rule 5.6 generally voids them — to trap the client.

What neither opinion authorises is a pre-deal sounding. Calling a general counsel to ask, in confidence, whether they would follow you, before you have a term sheet and before you have told your firm, is not “notice.” It is a test of the book. It is also how many current firms first hear that a partner is in play. Portability is diligence you run on paper and in your own judgement first; see our client-portability framework. Clients are told when the move is a decision. Sounding a client to test the book is not notice. It is a leak with an ethics problem attached.

Thomson Reuters Institute’s 2026 market report notes that fewer than one-third of laterals bring both the entire book and the team. That is why firms ask. It is also why a team conversation, held too early, is a process-risk event rather than a staffing detail. The moment two partners and an associate share a plan, you have a good-faith and confidentiality problem at the current firm. In England and Wales you may also have a regulatory one.

CM Murray’s 2025 briefing on partner and team moves records recent SRA rebukes of solicitors who transferred client materials without consent — Code paragraph 6.3 and Principle 2 — including a Section 43 order against a non-solicitor who emailed around 50 messages of client and firm files to a personal account before leaving and then used them. The same briefing is blunt that individual and team moves do not enjoy the disclosure provisions that can attach to a firm merger, that business plans and interviews are accidental-disclosure surfaces, and that talking too freely about which team members would move — including handing over personal contact details — is how partners get into difficulty. Associates move of their own free will. Group chats, shared drive folders of precedents, and a pitch that “the team is coming” are how lift-outs become injunctions and SRA files.

The decision whether a team is the right instrument is a different guide: team move versus individual move. The process-risk overlay is simpler. No team conversation before a term sheet. Each lawyer, separately. No client files, precedent banks or working lists leaving the building. No sounding of the clients those associates sit on until notice has been given. If the book is only serviceable with a following bench, that is a diligence fact for the target firm’s integration plan — see our integration-plan guide — not a reason to start a group process in month one of a confidential search.