Private Equity Lawyers Work Almost Only for Sponsors: Not the Reverse

A general counsel comparing law firms for private equity sponsors meets a market that is lopsided in one direction. Sartori & Partners data show 1,300 dated deals worked by private equity lawyers in the 12 months to October 2026, and 1,091 of them, or 83.9%, were for financial sponsors. From the client side the picture reverses. Sponsors were the client on 3,326 deals in the same window, and private equity lawyers were on only 32.8% of them. The practice depends on sponsors far more than sponsors depend on the practice. Deal counts are matters on record, not fees, but they show which benches a fund actually calls.

No other client sector comes close inside the practice. Asset management and fund clients appear on 3.1% of the practice's deals and technology and software companies on 2.2%. Across all dated deals, sponsors are the client on 6.9%, so the private equity bench works for them at 12.2 times their weight in the deal market.

Other benches that serve sponsors are far less tied to them. Of the 1,221 deals worked by funds and investment management lawyers, 29.3% were for sponsors. For corporate and M&A lawyers the figure is 2.7%, and for banking and finance lawyers 6.6%.

For a fund this cuts both ways. A private equity group lives on sponsor mandates, so its partners see current terms across many funds and have every reason to keep a sponsor client close. The same partners spend their days across the table from your rivals. Conflict checks and named staffing matter more here than in a corporate group, where sponsor work is a small part of the book.

Private equity lawyers hold the largest practice share of sponsor deals, but the sector's work spreads well beyond them. In the Sartori & Partners deal records, funds and investment management lawyers appear on 10.8% of sponsor deals, corporate and M&A lawyers on 9.1% and banking and finance lawyers on 6.0%. Capital markets lawyers follow at 2.6% and real estate lawyers at 1.7%. One deal can carry lawyers from several practices, so these shares overlap and are never added.

Asset managers, the neighboring client sector, buy from a different bench. Funds lawyers lead there, on 33.6% of asset management and fund deals, while private equity lawyers appear on just 1.7%. For sponsors the private equity group comes first; for asset managers it barely registers.

The panel question is therefore wider than which private equity group to hire. A buyout needs fund structuring, acquisition debt and, for many add-ons, ordinary corporate work. Ask each candidate firm which of those benches would staff your deal and whether those lawyers sit in the same offices as the private equity partners.

Kirkland & Ellis is the only firm in the 251-400 band of deals advised for financial sponsors over 12 months. Latham & Watkins and Ropes & Gray come next in the 151-250 band. This list counts every deal for a sponsor client, whichever practice worked it: no firm list exists for private equity practice work for sponsors alone.

The ranking by private equity practice deals, across all client sectors, reads differently. Latham & Watkins and Ropes & Gray rank first and second there, both in the 101-150 band, and Kirkland & Ellis ranks 3rd. Because the sponsor list counts every practice, a firm can rank higher on it when its funds, finance and corporate lawyers also carry sponsor deals.

Nine of the ten names appear on both lists. Jones Day is on the sponsor list only, and Weil Gotshal & Manges on the practice list only. The five sponsor advisers ranked sixth to tenth all sit in the 61-100 band, close enough that a fund can use them for conflicts and for price tension against the firms above.

Sartori & Partners also note where the lawyers on each deal sit. 43.2% of the sector's deals were handled with lawyers in New York, 29.5% with lawyers in London and 24.0% with lawyers in Washington. Paris, at 8.8%, sits just above Frankfurt at 8.2%. A deal can involve lawyers in several cities, so the shares overlap and are never summed.

Set against asset managers, the European tilt is plain. London lawyers worked on 18.1% of asset management and fund deals and Paris lawyers on 4.0%, against 29.5% and 8.8% for sponsors. Washington runs the other way, at 27.0% for asset managers, where fund regulators sit.

For a fund that buys and finances on both sides of the Atlantic, the test is one team that runs New York and London on the same transaction, with Paris and Frankfurt partners on call for continental targets. A US firm with a thin European bench, or a European firm without New York depth, will pass part of the deal to someone else.

Deals for financial sponsors rose 8.9% year on year, from 3,056 to 3,329 on settled 12-month windows ending September 2026. Deals worked by private equity lawyers rose 10.4% over the same windows, from 1,182 to 1,305. All dated deals rose 10.6%, from 43,590 to 48,216, while work for asset managers held flat (+0.6%).

Both sides grew, and the practice kept pace with its main client, so the bench is not becoming less tied to sponsors. Expect the private equity groups you rely on to be busier than a year ago. Book partner time for a planned sale process early, and agree in writing who covers when two of your deals land in the same month.

Hire a private equity group first, but do not stop there. With private equity lawyers on 32.8% of sponsor deals, the funds, finance and corporate benches carry much of the work, so judge them by name before you sign a panel letter.

Treat the private equity group's focus as both strength and risk. A practice that does 83.9% of its deals for sponsors knows market terms and also acts for your competitors; ask how deal teams are walled off and who replaces a conflicted partner.

Read the firm list for depth, not just rank. Kirkland & Ellis stands alone in the 251-400 band, and the five firms in the 61-100 band give a fund real alternatives for conflicts and second opinions.

Staff across the Atlantic from day one: 29.5% of sponsor deals were handled with lawyers in London, so require a London partner on the same team as New York, and a Paris contact for French targets.