Corporate Benches Lose 20.1 Lawyers to Companies per Hundred Laterals

Law firm associates leaving for in-house roles are a planning problem before they are a retention problem, and the size of the problem depends on the practice group. Sartori & Partners data show that Corporate & M&A sent 20.1 lawyers to companies for every hundred of its lateral moves between May and October 2026, while Litigation & Disputes sent 12.3. The corporate rate is 1.6 times the litigation rate. Associates made up 76.7% of everyone who left a firm for a company, and firms of 1,000+ lawyers were the employer left behind in 59.3% of cases. For a firm that trains its own corporate associates, that is a standing draw on the mid-level class. This report shows where the draw falls and what it means for lateral planning.

Raw counts point the wrong way. In the Sartori & Partners lateral database, litigators made 359 moves to companies over 6 months and corporate lawyers 316, so litigation supplied more people. Litigation is also far larger as a lateral market: 2,919 moves between firms in the same months, against 1,569 in corporate. Measured against its own lateral flow, corporate gives up 7.8 points more per hundred moves than litigation does.

The other transactional benches sit close to litigation, not to corporate. Banking & Finance ran at 12.7 departures to companies per hundred lateral moves, Real Estate at 11.3 and Private Equity, which shares much of its deal work with corporate, at 11.4. The figure for the whole market was 13.1. Among the large practices, corporate stands on its own.

For a managing partner, this sets the order of work. A litigation group can treat a move to a company as an occasional event and plan headcount around lateral turnover. A corporate group cannot: the in-house route is a second exit with its own volume, and it has to sit in the staffing model next to departures to rival firms.

Associates accounted for 76.7% of moves from law firms to companies, counsel for 12.0% and partners for 11.0%. Among moves between firms over 12 months, associates were 58.5% and partners 27.7%. The associate share on the in-house route runs 18.2 points above the lateral market.

Companies took 11.3% of all lawyers who left a firm in those months, against 86.1% who joined another firm. That title split is market-wide. Sartori & Partners does not publish the title mix of in-house moves practice by practice, so the corporate rate above includes partners and counsel too. What the corporate figures do show is a lateral market of ordinary shape: associates were 57.7% of corporate moves between firms, against 58.5% across all practices. Corporate does not hire unusually junior laterals; it sees an unusual number of lawyers leave for companies relative to its lateral volume.

Partner retention plans do little against this exit. The levers sit in the associate years: pay progression, a partnership track that associates can see, and the mix of client work a mid-level lawyer gets before a company offers a broader brief.

Firm size shapes the draw as much as practice does. Firms of 1,000+ lawyers were the firm left in 59.3% of moves to companies, firms of 400-999 lawyers in 24.1% and firms under 150 lawyers in 4.3%. The largest firms took 53.6% of lateral hires as the joining firm, so their share of departures to companies sits 5.7 points above their share of lateral arrivals.

Corporate work concentrates in that same size class. Firms of 1,000+ lawyers received 62.6% of corporate lateral hires, against 43.3% in litigation. The largest firms also turn over faster in general: Sartori & Partners measures a median leaving rate of 14.8% a year at firms of 1,000+ lawyers, against 13.2% across all firms measured.

A large firm with a big corporate group carries both pressures at once: the large practice with the highest in-house rate, inside the size class that supplies most departures to companies. That is the group where the replacement plan should be written down each year rather than assumed.

Firms are already trying to refill that layer. On the data date, law-firm career pages listed 16,920 open roles at 218 firms, and the median opening set a floor of 3 years and a ceiling of 6. Corporate & M&A accounted for 1,147 of the openings tagged to a practice and litigation for 1,233, even though litigation's lateral market is 1.9 times the size of corporate's.

The lateral numbers point the same way. Corporate hiring between firms rose 15.8% year on year, to 2,933 moves from 2,532, and 539 firms hired at least one corporate lateral in 12 months. Part of that buying is replacement. A corporate associate who joins a company has to be found again among other firms' associates, at lateral cost, against hundreds of competing bidders.

The consequence is a recurring cost line. A firm that recruits corporate associates in the 3 to 6 year band is bidding for the same seats the in-house route empties, and it should budget search fees and signing terms for that band as a standing item, not a one-off.

Model the two exits separately. At 20.1 departures to companies per hundred lateral moves, a corporate group's attrition is not captured by tracking moves to rival firms alone; at 12.3, a litigation group's mostly is. Size the junior corporate intake on the assumption that part of each class will leave for a company before partnership, and plan the lateral associate search for the 3 to 6 year band before the gap opens, not after.

Aim retention spend where the departures are. With associates at 76.7% of moves to companies, money spent on partner retention does not touch this flow. At firms of 1,000+ lawyers, which were the firm left in 59.3% of cases, the mid-level corporate class deserves its own review each year. Finally, treat the corporate associate who moves to a company as a future buyer of outside counsel: a firm that keeps that relationship turns a departure into a source of instructions. Sartori & Partners refreshes these figures from public law-firm announcements, firm websites and professional profiles, checked monthly.