International Arbitration Lawyers: London, the Gulf and Asian Seats

Sartori & Partners data show that London received 52 of the 199 international commercial arbitration lateral moves recorded in the 12 months to October 2026, a share of 26.1%. Across all practices London took 9.2% of moves, which puts the city's arbitration index at 282. For a firm hiring international arbitration lawyers London is the first market to search and also the most contested one, because most competing firms are searching there at the same time. Beyond London the work spreads across a second ring of seats, and the people in it move between cities more often than lateral hires in other fields.

The London lead is not a one-year reading. Over 3 years the city took 28.8% of international commercial arbitration moves, while its share of the whole lateral market over the same period was 10.0%, a gap of 18.8 points. New York reverses the pattern. It is the largest lateral city overall, with 14.2% of all moves over 3 years, yet it took only 7.1% of arbitration moves.

The speciality and its practice tell the same story because they largely overlap: international commercial arbitration accounts for 92.0% of the moves recorded in international arbitration and public international law. That practice indexes London at 307, close to the speciality's own figure. A London arbitration search therefore competes with almost every firm that runs the practice, and the shortlist should be built on the assumption that the strongest candidates are already being approached.

After London, no single city dominates. Over 3 years New York took 7.1% of arbitration moves, Dubai 6.9%, Singapore 6.8% and Paris 6.8%. Hong Kong follows with 4.5% and Washington, DC with 4.2%. The Gulf and Asian seats matter far more here than in the general market: in the 12 months to October 2026, Dubai received 0.8% of all lateral moves and Singapore 0.6%.

Paris shows the same tilt as London on a smaller scale: it took 6.8% of arbitration moves against 2.3% across the market over 3 years. Each second-ring city is a modest pool on its own. A firm opening or deepening an arbitration seat in Dubai, Singapore or Paris will rarely fill it from local moves alone, and should plan on drawing from London or from another seat in the ring.

Arbitration lawyers relocate more readily than the rest of the market. In the Sartori & Partners lateral database, 24.8% of international commercial arbitration movers changed city in the 12 months to October 2026, against 20.5% across all lateral moves. The 3-year figures hold the same gap, 25.1% against 21.6%. Teams also move together more often: 6.0% of arbitration moves were part of a team joining the same firm in the same quarter, 4.0 the market rate of 1.5%.

The consequence for a hiring firm is that the candidate pool for a seat is international, not local. A Dubai or Singapore search can reasonably include lawyers based in London or Paris, and a London search competes with offers that would move a candidate abroad. Relocation terms belong in the first conversation, not the last, and a team hire is a realistic route in this speciality.

Partners made up 38.7% of arbitration laterals in the 12 months, against 27.7% in the market, and associates 44.2% against 58.5%. Volume is steady. Arbitration hiring held flat (+4.0%) year on year, with 206 moves in the settled 12-month window against 198 in the one before, while hiring across the market rose 9.0%. Partner hiring in the speciality held flat (+13.2%), at 77 against 68.

A pool that is not growing, in a market that is, means arbitration searches compete for the same people each year. Promotion is the slower alternative: the median time from first year of practice to partner in the speciality is 10.0 years, so a firm that cannot hire a partner should expect to wait for one it trains.

Firms of 1,000+ lawyers took 68.2% of international commercial arbitration laterals in the 12 months, against 53.6% across the market. Firms of 400-999 lawyers took 26.8%. Hiring is concentrated by firm as well: the top 10 hirers took 34.9% of the speciality's moves, against 12.9% for the top 10 in the whole market.

Hogan Lovells Cadwalader heads the 12-month list, followed by Paul Hastings and Stephenson Harwood; the first eight hirers each sit in the 6-10 band of hires. Partner hiring over 3 years draws a different list, headed by Keystone Law and Holman Fenwick Willan. A firm below the largest size class can still win arbitration partners, but it is hiring against platforms that offer an existing network of seats.

Sartori & Partners figures point to three practical steps. First, treat London as the anchor of any arbitration search: its index of 282 means the deepest pool and the most competition sit in the same city, so the timetable should allow for counteroffers. Second, size each second-ring seat on 3 years of moves, where Dubai shows 6.9% and Singapore 6.8%, and expect to recruit across borders to fill them. Third, budget for relocation from the start, because 24.8% of movers change city.

A firm without a 1,000+ lawyers platform should lead with what the large firms cannot offer every candidate: a clear route to run cases in a named seat, and a role in building it. With hiring flat and partners a larger part of each year's moves, the firms that move first on a known candidate will fill the seat; those that wait for supply to rise will not see it.