›Direct answer & research summary
Sartori & Partners applies a weighted methodology combining practising-lawyer opinion — more than 10,000 lawyers interviewed — with monthly market surveys. The Luxembourg board as of July 2026 comprises: A&O Shearman, Clifford Chance, CMS, Loyens & Loeff, K&L Gates, Simpson Thacher & Bartlett, Debevoise & Plimpton, Dechert, Eversheds Sutherland, Fieldfisher, Goodwin Procter.
01 — The ranking
The Luxembourg board
A tier on the Luxembourg board is an editorial judgement in words, never a score. Within a tier no firm outranks another — order rotates monthly and the REF is a locator, not a rank. Each row links to the firm profile and the evidence behind its place.
Market leaders are the firms peers and clients treat as the Luxembourg benchmark. Placement is a worded judgement reviewed against survey and mapping evidence.
Firms here maintain a clear, busy Luxembourg practice profile. The label is editorial; within-tier order rotates and carries no hierarchy.
Use this band for boutiques and focused practices with a mapped Luxembourg signal. Editorial words only — no scores, no within-band hierarchy.
All counts are shown as bands, never precise headcounts. Notable firms sit outside the tiers by design: verified minimal presence, not assessed at full tier depth.
Hiring in Luxembourg?
We map this market every day.
The evidence behind these tiers is the same intelligence we use to run retained searches for partners, groups and senior associates.
02 — Evidence, methodology & sources why each firm · how tiers are set · sources · change log · verified 23 Jul 2026 · next review 23 Aug 2026
Firm evidence
A&O Shearman
A&O Shearman is placed in market leaders for Luxembourg. Public mapping (banded): 100–199 attorneys, major local depth, ≈25 partners · 30 counsel · 70+ associates. Evidence gates — office (G1) PASS, local practice (G2) PASS, recent signal (G3) PASS. The placement carries no numeric score.
Strongest mapped work
Public hiring signal
Hiring signal: FLAT — no public hiring change detected in the mapping window.
Limits of this assessment
- —A tier is Sartori’s editorial opinion, not a fact about the firm or a client-satisfaction measure.
- —Facts are mapped from public sources and shown as bands; they lag reality by weeks or months.
- —No third-party legal-directory band is used as an input.
Sources for this entry
- A&O Shearman — Luxembourg office pagesfirm_website · G1 · 2026-07-21
- Lawyers in Luxembourg - A&O Shearmanfirm_website · G2 · 2026-07-21
- A&O Shearman — Luxembourg news & announcementsfirm_website · G3 · 2026-07-21
Methodology
How tiers are assigned
Deterministic public-footprint core (local depth, practice share, seniority mix, public hiring momentum), computed relative to this market's own distribution. Tier placement is derived from this public mapped data; a per-firm public-source ledger is compiled for firms in the annual research pass and applies to those firms' factual claims, not to tier membership. No third-party legal-directory bands are used as an input.
Market scope
10–24 firms earn a tier in Luxembourg within this scope (banded).
Disclosures
Firm names used nominatively (factual). All counts shown as bands, never precise headcounts. No firm logos. Report an error via the site contact form.
Sources & change log
- 1 A&O Shearman — Luxembourg office pagesfirm_website · G1 · 2026-07-21
- 2 Lawyers in Luxembourg - A&O Shearmanfirm_website · G2 · 2026-07-21
- 3 A&O Shearman — Luxembourg news & announcementsfirm_website · G3 · 2026-07-21
- 4 Clifford Chance — Luxembourg office pagesfirm_website · G1 · 2026-07-21
- 5 Luxembourg | Clifford Chancefirm_website · G2 · 2026-07-21
- 6 Clifford Chance — Luxembourg news & announcementsfirm_website · G3 · 2026-07-21
- 7 Luxembourg | Loyens & Loefffirm_website · G1 · 2026-07-21
- 8 Luxembourg | Loyens & Loefffirm_website · G2 · 2026-07-21
- 9 Loyens & Loeff — Luxembourg news & announcementsfirm_website · G3 · 2026-07-21
04 — Questions
About this ranking
Who are the best law firms in Luxembourg?
As of July 2026, A&O Shearman occupy Tier 1 — Market leaders — on Sartori's Luxembourg board. That band is an editorial judgement of bench depth, seniority mix and market standing; full placement of all 11 visible firms is on this page.
Is A&O Shearman the best law firm in Luxembourg?
A&O Shearman sits in Tier 1 — Market leaders — of Sartori's Luxembourg board as of July 2026, alongside . Sartori does not name a single #1: the gap between Tier 1 firms is genuinely unmeasurable, and a numeric score would be false precision.
Which are the biggest law firms in Luxembourg?
By mapped Luxembourg bench, the largest firms on this board are A&O Shearman, Loyens & Loeff (100–199 mapped lawyers each), followed by Clifford Chance, CMS (50–99). All counts are bands, never precise headcounts.
Which law firms are hiring in Luxembourg right now?
As of July 2026, no firm on this board shows a public hiring signal in the mapping window. Live Luxembourg mandates are listed on Sartori's jobs board.
What is a Tier 1 law firm?
In Sartori's rankings, Tier 1 — Market leaders — is an editorial judgement expressed in words, never a score: the firms whose Luxembourg bench depth, seniority mix and market standing set the reference point for the market. As of July 2026 that is A&O Shearman. Within the tier no firm outranks another.
Which are the best law firms for finance & banking in Luxembourg?
Sartori publishes a dedicated Finance & Banking board for Luxembourg: as of July 2026 its Tier 1 is Clifford Chance, A&O Shearman. See the full ranking at /firms/finance-banking/in/luxembourg/.
Which are the best law firms for mergers & acquisitions in Luxembourg?
Sartori publishes a dedicated Mergers & Acquisitions board for Luxembourg: as of July 2026 its Tier 1 is A&O Shearman. See the full ranking at /firms/mergers-acquisitions/in/luxembourg/.
Which are the best law firms for corporate & m&a in Luxembourg?
Sartori publishes a dedicated Corporate & M&A board for Luxembourg: as of July 2026 its Tier 1 is A&O Shearman. See the full ranking at /firms/corporate/in/luxembourg/.
Which are the best law firms for investment management in Luxembourg?
Sartori publishes a dedicated Investment Management board for Luxembourg: as of July 2026 its Tier 1 is CMS. See the full ranking at /firms/investment-management/in/luxembourg/.
Which are the best law firms for tax in Luxembourg?
Sartori publishes a dedicated Tax board for Luxembourg: as of July 2026 its Tier 1 is CMS. See the full ranking at /firms/tax/in/luxembourg/.
Which are the best law firms for banking & lending in Luxembourg?
Sartori publishes a dedicated Banking & Lending board for Luxembourg: as of July 2026 its Tier 1 is A&O Shearman. See the full ranking at /firms/banking-lending/in/luxembourg/.
This ranking is compiled independently by Sartori from public sources. Tiers are Sartori’s editorial opinion, expressed without numeric scores; firms are named for identification only, no logos are reproduced, and no firm has paid for or approved its placement. No third-party legal-directory band is used as an input. Nothing here is legal advice or a recommendation to instruct counsel.