Brussels Lateral Partner Market 2026: An Antitrust City

The Brussels lateral partner market is built around one practice. Sartori & Partners data show antitrust and competition involved in 36.4% of the 121 lateral moves into Brussels firms in the 12 months to October 2026, against 2.9% across the whole market. For a firm leader weighing a Brussels partner hire or a Brussels office, that single fact shapes the rest: who the candidates are, which firms bid against you, and how deep the bench is outside competition work.

Over 12 months, antitrust and competition carried an index of 1,260 in Brussels: its share of the city's lateral moves was 12.6 times its share of the market. London, the largest European city in our lateral tables, sits at 128 for the same practice, with antitrust in 3.7% of its moves, a modest lean in a city whose hiring is spread across finance, corporate and disputes. On the index, Brussels leans on antitrust 9.8 times as hard as London does.

The 12-month figure is no one-year spike. Over three years, antitrust and competition was involved in 34.0% of the 335 lateral moves into Brussels, ahead of litigation and disputes at 23.3% and corporate and M&A at 17.3%. Litigation, the largest practice in the market, runs at an index of only 58 in Brussels. A move can carry more than one practice, so the shares in the table overlap.

The consequence for a firm without a Brussels competition group is plain. An office opened here for general corporate or disputes work draws on a much thinner lateral pool than the city's headline volume suggests, because a large part of that volume is antitrust lawyers moving between antitrust practices.

Brussels took 0.9% of all lateral moves in the market over 12 months, but 10.8% of the moves that involved antitrust and competition: 44 moves in one city. The flow is steady. In the Sartori & Partners lateral database, Brussels antitrust moves stood at 42 in the 12 months to September 2026 and 42 in the 12 months before, unchanged, while the city as a whole held flat at 122 moves against 124.

By start year, the count has stayed in a narrow band, from 26 in 2023 to 37 in 2025, with 38 already on record for the first ten months of 2026.

Merger control is the core of the work. Over three years, 71.1% of Brussels antitrust moves involved lawyers who focus on merger control, 41.2% on abuse of dominance, 33.3% on cartels and 21.1% on foreign subsidies and state aid; one lawyer can hold several of these focuses. The matter flow matches: 111 dated deals and matters over three years involved Brussels antitrust lawyers, and 47.7% of them were regulatory and antitrust reviews.

For a hiring firm, this sets the test for a candidate. Merger control depth is the common profile and the easiest to find; a partner whose standing rests on cartel defense or state aid comes from a smaller subset and is worth a longer search.

Partners made up 24.0% of Brussels lateral moves over 12 months, 29 hires in all, against 27.7% across the market and 29.3% in London. Associates fill the difference, at 66.9% of Brussels moves.

Partner hiring did not move enough to call a trend. Brussels firms took in 30 lateral partners in the 12 months to September 2026 and 20 in the 12 months before; on counts this small the gap sits inside the noise, so we read it as flat. Over three years, 61 partners joined Brussels firms laterally, 18.2% of all moves into the city.

Within antitrust the partner slice is thinner again. Partners were roughly 22.7% of Brussels antitrust moves over 12 months and 16.7% over three years, both below the city's own partner share. Few partners are made in the move itself: 9.9% of Brussels moves came with a higher title, against 12.9% across the market. Firms grow their own instead: Brussels antitrust groups promoted 39 lawyers to partner over five years.

Read together, the numbers say a Brussels competition partner search runs through a small pool. The deeper bench sits one level down, in senior associates and counsel who already run merger filings and can be hired with a defined path to partner.

Firms of 1,000+ lawyers took 74.4% of Brussels lateral hires over 12 months, against 53.6% across the market and 68.5% in London. In antitrust the share climbs to 88.6%. Firms of 400-999 lawyers took 23.1% of Brussels hires, and smaller firms too few to publish.

Hiring sits in few hands as well. Over three years, the top 10 hirers at all levels took 40.3% of Brussels lateral moves, against 12.2% for the market's top 10 and 21.4% in London. Antitrust lawyers also move in teams more often: 11.4% of Brussels antitrust moves were part of a team joining the same firm in the same quarter, against 4.1% for the city and 1.5% for the market.

The 12-month partner list is too thin to publish, so the three-year view is the useful one. Dentons heads it, in the 6-10 band of partner hires. A smaller firm that bids for a Brussels competition partner is bidding mostly against global platforms, and it needs a clear case for the practice, such as referral flow from its other offices, rather than price alone.

Over three years, 63.6% of lateral moves into Brussels firms started at another Brussels firm, and in antitrust the figure was 69.3%. The city still draws more relocation than London: 27.5% of Brussels moves over 12 months came with a change of city, against 15.2% in London and 20.5% across the market. London is the one destination large enough to publish, with 20 lawyers leaving Brussels firms for London over three years.

Smaller firms train lawyers that larger firms then hire. Firms under 150 lawyers were the previous employer in 9.7% of Brussels moves over three years, but the hiring firm in only 1.5%. For a hiring firm, the local boutiques and national firms are a real source of competition talent, and the London market is a second pool for profiles Brussels cannot supply.

Treat Brussels as a competition market first. With antitrust at an index of 1,260, an office plan built on other practices should be sized against the city's general bench, not its headline lateral count.

Expect to compete with the largest platforms. Firms of 1,000+ lawyers hired 74.4% of Brussels laterals, so a credible offer has to show a pipeline of merger filings and investigations, not only compensation.

Look one level down. Partners were 24.0% of Brussels moves, and the antitrust partner slice is thinner still. Senior counsel with a dated route to partner is often the faster hire.

Map the local market before London. Most Brussels candidates already sit at Brussels firms, and smaller local firms supply a share of them. London adds reach for specific profiles; it does not replace a Brussels search.