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Last updated:
May 28, 2026

Sidley Austin

US firm
·
Founded 1866
Known for:
Capital Markets
Corporate / M&A
Leveraged Finance
Visit firm website
21
offices globally
$3.7bn
revenue 2025
$6m
profit per equity partner
60+
London partners

About

Sidley Austin

Sidley Austin is one of the largest law firms in the world.

Founded in Chicago in 1866, Sidley has grown from a Midwestern firm into one of the world’s preeminent legal giants, with more than 2,300 lawyers spread across 21 offices worldwide, and global revenue of $3.7 billion.

Sidley’s presence stretches across all the major legal markets, with US strongholds in New York, Chicago and Washington D.C., and bases in all the key financial centres globally, including London, Singapore, Hong Kong and Tokyo.

The firm’s London office, established way back in 1974, serves as an increasingly important hub for its European operations and plays a pivotal role in the firm's global strategy. The office is now home to over 150 lawyers, including more than 50 partners.

While Sidley may not command the same brand recognition in the UK as some of the Magic Circle firms, its reputation in the US is right up there with the likes of Kirkland & Ellis, Latham & Watkins and Skadden.

Widely regarded as edging closer to full-fledged "global elite" status, Sidley is firmly positioned alongside top-tier US rivals and is increasingly comparable to the most prestigious Magic Circle names on the international stage.

In the London market, Sidley is probably best known for its powerhouse banking and finance practice, advising banks, asset managers, private equity firms, and corporate borrowers on everything from regulatory compliance and restructuring matters, to high-yield bond issuances and derivatives and structured products.

The firm’s leveraged finance practice is perhaps its strongest card, handling big-ticket mandates with an increasing focus on private equity deals. It’s also a strategic priority for Sidley, reflected in a string of recent high-profile hires from top US rivals in London.

With its growing bench strength, the firm is positioning itself to compete head-to-head with the likes of Kirkland and Latham as the City’s go-to debt finance adviser on the largest buyouts.

Recent work highlights

Recent deal and industry highlights for Sidley Austin in London include:

Private Equity’s Data Centre Play: In 2025, Sidley advised private equity giant Apollo on its €2 billion acquisition of German data centre cooling specialist Kelvion.

$2.7bn Soho House buyout: In August 2025, Sidley Austin advised private members’ club Soho House on its $2.7 acquisition by a group including hotel boss Tyler Morse, PE firm Apollo and a consortium led by Ashton Kutcher

Evri on its merger with DHL: Sidley advised Evri and private equity owner Apollo on the corporate aspects of Evri's merger with the UK arm of DHL in May 2025.

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What is Sidley Austin known for?

Sidley Austin is a full service corporate law firm. In the UK market, it is best known for its expertise in the following areas:

Leveraged Finance

A key area of focus for Sidley in London, it has a fast-growing sponsor-side finance practice greatly boosted by the string of high-profile hires it made from Latham in 2024. The firm is ranked in Band 2 by Chambers for borrower-side advice.

Capital Markets

Sidley has a strong debt capital markets (DCM) practice, advising issuers including corporate borrowers, financial institutions and private equity sponsors. The firm has a Band 3 ranking by Chambers.

Corporate/M&A

Sidley has a growing reputation as a leading adviser on mid-market M&A transactions. It has a Band 5 ranking by Chambers on mid-market deals.

Financial performance

$3.7bn
revenue 2024
$6m
profit per equity partner

Sidley Austin is one of the biggest law firms in the world by revenue. In 2025, its global revenue was $3.7 billion.

In 2025, its profit per equity partner (PEP) was $6 million.

London salaries

Here’s what Sidley Austin pays its London trainees and newly qualified (NQ) lawyers:

Trainee first year:
£60,000
Trainee second year:
£65,000
Newly qualified (NQ):
£175,000
See how Sidley Austin compares across all of the UK’s top law firms

Who does Sidley Austin compete with?

Globally, Sidley Austin competes with the top tier of US firms considered the elite players globally.

In the UK market, on high-profile finance mandates, Sidley competes with the Magic Circle and leading US rivals, including:

Trainee information

Training contracts
17
Seat structure
4 seats
Seat length
6 months
Find out more and apply for a training contract or vacation scheme at Sidley Austin

Other things to know

Raid on Latham & Watkins: Sidley hired at least 18 finance lawyers - including eight partners - from Latham & Watkins in London in 2024. The moves were a key part of Sidley’s strategy to become one of the City’s leading private equity shops for borrower-side advice.

London growth: Sidley's London revenues now stand at $299 million. The office first broke the $200 million mark in the 2023 financial year.

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