Mayer Brown
Global corporate law firm handling finance, litigation, and high-value deal work.
On the record
Checkpoint: FY2026 results reveal whether billed-hours compression and equity-partner growth continue or reverse
The call
Mayer Brown is raising rates and shrinking its client list while AI absorbs junior work, betting that licensure keeps the higher-value practice out of reach for both machines and rivals.
Mayer Brown is a large law firm that handles major corporate deals, lawsuits, and regulatory work for big clients. It is hard to replace because only licensed attorneys can sign legal opinions, appear in court, and accept responsibility for mistakes, so no software can do that part of the job. The firm is using AI tools to speed up routine work like document review and drafting, which is raising profits and rates, but the real question is whether rival Kirkland & Ellis, which spent $500 million building its own AI system, will start winning deals with faster and cheaper service that Mayer Brown cannot match.
Why
01
AI pressure: Generative AI tools for document review and contract drafting. AI speeds up junior associate work like drafting and review, but only licensed lawyers can sign opinions or appear in court. Could AI do the core job? Unlikely.
02
Bigger players: Kirkland & Ellis. Kirkland is reportedly spending $500M on proprietary AI and already runs at $10B revenue versus Mayer Brown's $2.17B. Could a giant copy it? Probably.
03
What protects it. Bar licensure and malpractice liability mean no AI model can sign opinions, appear in court, or bear legal responsibility.
What would change this call
Kirkland & Ellis's $500M AI build produces measurable client-facing speed or cost advantage within 12-24 months. Would show AI tooling can erode Mayer Brown's buy-vs-build margin edge.
Mayer Brown's billed hours fall further below 2.8M in FY2026 while equity partner growth flattens. Would signal the associate-to-partner leverage model is narrowing faster than repositioning offsets.
Lateral partner departures in private credit, insurance, or capital markets practice groups. Would indicate client or margin instability in the firm's newly concentrated high-value areas.
Mayer Brown's billed hours fall further below 2.8M in FY2026 while equity partner growth flattens. Would signal the associate-to-partner leverage model is narrowing faster than repositioning offsets.
Lateral partner departures in private credit, insurance, or capital markets practice groups. Would indicate client or margin instability in the firm's newly concentrated high-value areas.
Key numbers
- FY2025 revenue $2.17B, up ~10%
- Profit per equity partner $3.196M, up 14.5%
- Billed hours fell to 2.8M from 2.91M as rates rose
Named risks
- Kirkland's $500M proprietary AI build could produce client-facing speed/cost advantage pressuring Mayer Brown's buy strategy.
- Billed hours compression (2.91M to 2.8M in FY2025) despite rate hikes signals softer underlying demand.
- Deliberate client roster narrowing (7,600 to 6,316) increases revenue concentration in fewer, larger clients.
- Sector-wide government/executive-order pressure on Big Law firms remains a live, unresolved risk factor.
- Associate-to-partner leverage model narrowing as equity tier grows while hours dip could squeeze margins long-term.
Rivals, as read in July 2026
| Rival | Direction | Evidence |
|---|---|---|
| Kirkland & Ellis | losing to | Kirkland hit $10B revenue in FY2025 (2026-05-04) vs Mayer Brown's $2.17B; also building $500M proprietary AI stack (2026) |
| Latham & Watkins | losing to | Latham revenue ~$8.3B (2026-04-15) vs Mayer Brown's $2.17B in same reporting period |
| Wachtell Lipton | losing to | Wachtell PEP hit $12.15M, first firm over $12M (2026-05-04) vs Mayer Brown's $3.196M PEP |
| White & Case, Sidley Austin, Hogan Lovells, King & Spalding, Willkie Farr | contesting | All sit in same $1.5B-$3.3B global revenue band as Mayer Brown per 2026-07-02 rankings |
Questions people ask
- Is Mayer Brown profitable in 2025?
- Yes. Mayer Brown's FY2025 revenue grew nearly 10% to $2.17B and profit per equity partner rose 14.5% to $3.196M, reported March 24, 2026, showing strong profitability growth even as billed hours dipped slightly.
- Could AI replace Mayer Brown's lawyers?
- No. Only licensed attorneys can sign opinions or appear in court, so AI cannot legally substitute for lawyers. Mayer Brown deployed Harvey and Microsoft Copilot with a mandatory GenAI curriculum launched April 13, 2026, framed explicitly as augmentation, not replacement.
- Who is Mayer Brown's biggest competitor?
- Kirkland & Ellis, which became the first law firm to top $10B revenue in FY2025 (reported May 4, 2026), dwarfing Mayer Brown's $2.17B. Kirkland also committed roughly $500M to a proprietary AI build in 2026, versus Mayer Brown's buy-based Harvey/Copilot approach.
- Who owns Mayer Brown?
- Mayer Brown is a private partnership (LLP), not publicly traded, with no external investors or parent company. It is owned by its roughly 239 equity partners as of FY2025, a tier that grew about 4.1% that year, reported March 24, 2026.
- Did Mayer Brown lay off employees?
- No broad layoffs are documented. A 2024 headcount dip was attributed by leadership mainly to the December 2024 split from Hong Kong affiliate JSM and the 2024 Mexico City office closure and spin-out, not to attrition, per the firm's March 2025 report.
- What AI tools does Mayer Brown use internally?
- Mayer Brown approved Harvey as its first closed AI legal platform and rolled out Microsoft Copilot firmwide, backed by a mandatory GenAI training curriculum for nearly 1,800 lawyers launched April 13, 2026, requiring human review and citation-checking of AI output.
Timeline
- 2026-07-09CIO describes 'meaningful adoption' of Harvey and Copilot in legaltechnology.com interview
- 2026-04-13Launched mandatory GenAI curriculum for ~1,800 lawyers with human-review requirements
- 2026-03-24Reported FY2025 revenue up ~10% to $2.17B; PEP up 14.5% to $3.196M
- 2025-04Hired ex-DHS intelligence head to lead new investigations team
- 2025-03-27Reported FY2024 revenue up 3.9% to $1.98B; PEP up 14.3% to $2.8M
- 2024-12Formally separated from Hong Kong affiliate Johnson Stokes & Master amid US-China tensions
- 2024Closed Mexico City office; team spun out to independent firm with referral deal
Revision history
23 July 2026
First assessed. Hard to displace. The text above is fixed as of this date and is not edited afterwards.
In the same band
Sources
- Mayer Brown Grew Revenue About 10% in Year of 'Repositioning' (2026-03-24)
- Mayer Brown's Revenue Grows to $1.98B, PEP Rises 14% (2025-03-27)
- Mayer Brown (2026-04-25)
- Mayer Brown Number of Employees 2026 (2026-06-29)
- Mayer Brown launches comprehensive GenAI curriculum (2026-04-13)
- Training, adoption and the buy-v-build question: How Mayer Brown is scaling GenAI (2026-07-09)
- Kirkland Hits $10B, Wachtell Tops $12M Partner Pay (2026-05-04)
- The 2026 Am Law 100 Is Out (2026-04-15)
- List of largest law firms by revenue (2026-07-02)
- Artificial Intelligence (2026-06-11)