›Direct answer & research summary
Sartori & Partners applies a weighted methodology combining the opinions of practising lawyers — more than 10,000 lawyers interviewed — with monthly market surveys. As of July 2026, the best Mergers & Acquisitions law firms in Luxembourg are: A&O Shearman, Loyens & Loeff, Stibbe, Linklaters, HSF Kramer, Norton Rose Fulbright, Simpson Thacher & Bartlett, Addleshaw Goddard, Dechert.
01 — The ranking
The Luxembourg Mergers & Acquisitions board
A tier on this Luxembourg Mergers & Acquisitions board names relative firm standing in words. Placement speaks to fund-backed acquisitions, Luxembourg holding structures and multi-jurisdictional deal advisory presence; order inside each band carries no hierarchy and is not a score.
The top editorial band for the best Mergers & Acquisitions law firms in Luxembourg: firms that set the tone for cross-border and fund-backed M&A mandates at scale in Luxembourg. Within-tier sequence rotates and is not a ranking.
Highly active on the Luxembourg Mergers & Acquisitions board means consistent buy-side and sell-side presence and peer recognition short of the leader set. No numeric score is assigned.
This band covers firms with solid Mergers & Acquisitions standing and mapped deal benches in Luxembourg, without the intensity of the tiers above. Within-tier order is deliberately flat.
Notable in this field marks verified Mergers & Acquisitions presence in Luxembourg below full tier depth — specialist or thinner deal benches kept visible on purpose, not scored into the main bands.
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 Mergers & Acquisitions in Luxembourg. Public mapping (banded): 25–49 attorneys, major local depth, ≈5 partners · 5 counsel · 20+ 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
5–9 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 Luxembourg | Loyens & Loefffirm_website · G1 · 2026-07-21
- 5 Luxembourg | Loyens & Loefffirm_website · G2 · 2026-07-21
- 6 Loyens & Loeff — Luxembourg news & announcementsfirm_website · G3 · 2026-07-21
- 7 Contact | Stibbefirm_website · G1 · 2026-07-21
- 8 Stibbe — attorney bios & practice pagesfirm_website · G2 · 2026-07-21
- 9 Stibbe advises TwentyTwo Real Estate on the €225 million refinancing of Center Parcs Allgäu | Stibbefirm_website · G3 · 2026-07-21
- 10 Linklaters — Luxembourg office pagesfirm_website · G1 · 2026-07-21
- 11 Luxembourg | Linklatersfirm_website · G2 · 2026-07-21
- 12 Linklaters — Luxembourg news & announcementsfirm_website · G3 · 2026-07-21
04 — Questions
About this ranking
Who are the best Mergers & Acquisitions law firms in Luxembourg?
Who leads Mergers & Acquisitions in Luxembourg? As of July 2026, Market leaders are A&O Shearman. Sartori does not name a single number-one firm; the gap inside Tier 1 is treated as unmeasurable, and the wider board of 9 firms uses worded tiers only.
Is A&O Shearman the best Mergers & Acquisitions law firm in Luxembourg?
A&O Shearman sits in Tier 1 — Market leaders — of Sartori's Luxembourg Mergers & Acquisitions 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 firms have the biggest Mergers & Acquisitions benches in Luxembourg?
By mapped Luxembourg bench, the largest firms on this board are A&O Shearman, Loyens & Loeff (25–49 mapped lawyers each), followed by Stibbe, Linklaters (10–24). All counts are bands, never precise headcounts.
Which Mergers & Acquisitions teams are hiring in Luxembourg?
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 in Luxembourg overall?
Sartori's overall Luxembourg board groups 11 firms into editorial tiers; as of July 2026 its Tier 1 is A&O Shearman. See /firms/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.