Piper Alderman

Here's a rundown of the commercial law firms that dominate the Australian market and that businesses and in-house counsel actually turn to:

The "Big Six" – Top-Tier National/Global Firms

These are the heavyweight firms that handle the largest M&A deals, major litigation, and blue-chip corporate work in Australia:

• Herbert Smith Freehills, King & Wood Mallesons, and Gilbert + Tobin – the corporate and M&A rankings for 2025 show continued dominance by the Big Six firms, with Gilbert + Tobin, Herbert Smith Freehills, and King & Wood Mallesons leading in major transaction work. Gilbert + Tobin in particular handles many of the most complex and significant M&A and takeover deals and is acclaimed for combining pragmatism with a flair for novel solutions.
• Allens, Ashurst, and Clayton Utz round out the traditional "Big Six" alongside the firms above — these are the go-to names for ASX-listed companies, banks, and government for high-stakes corporate and regulatory work.

Strong Litigation & Disputes Players

If you need dispute resolution or commercial litigation specifically: Commercial litigation rankings showcase the depth of Australian legal expertise, with firms like Clayton Utz, Corrs Chambers Westgarth, and Johnson Winter Slattery leading in dispute resolution services.

Fast-Growing National Firms Worth Knowing

• Thomson Geer – has been expanding rapidly through acquisitions and is increasingly picked up by corporate boards; Thomson Geer has expanded significantly through strategic acquisitions. It's currently advising groups like the Cohen Group across corporate structuring, real estate, and tax.
• Hall & Wilcox – a well-regarded independent firm; Hall & Wilcox is a leading independent law firm with more than 1,300+ people, including 145+ partners, working across eight offices, servicing corporate, public sector and private clients, both Australian-based and international.
• Piper Alderman – solid mid-tier commercial credentials; Piper Alderman secured strong rankings, ranked in National Tier 2 for three practice areas, namely Commercial Law and Corporate Law.
• Addisons – strong reputation particularly in corporate and media law; Addisons was recognised amongst the top law firms in Best Lawyers 2026 edition of Best Law Firms™ across 14 areas, including Tier 1 rankings in Corporate Law, Defamation and Media Law, and Litigation.

Boutique Specialist to Consider

• Ironbridge Legal – if your matter is specifically complex litigation or insolvency, this boutique has been gaining serious traction. Ironbridge Legal is an award-winning top-tier boutique firm specialising in commercial litigation and insolvency, and the firm's 157% growth in 2025 reflects strategic expansion to meet client demand while maintaining its focus as a conflict-free specialist in high-stakes disputes and insolvency matters.

Practical Recommendation

For most Australian businesses, the choice comes down to scale of matter:

• Large-cap M&A, IPOs, major regulatory/competition issues → Allens, Ashurst, Clayton Utz, Herbert Smith Freehills, King & Wood Mallesons, or Gilbert +

The top commercial law firms in Australia (focusing on corporate, M&A, banking/finance, and broader business/commercial work) are consistently ranked highly by directories like Chambers Asia-Pacific, Legal 500 Asia-Pacific, and Best Lawyers.

These are the firms that major Australian businesses, ASX-listed companies, multinationals, private equity players, and government entities actually instruct on significant deals and matters. They're the ones handling high-value transactions, cross-border work, energy/resources projects, and complex commercial disputes.

The Standout "Top Tier" (Big 8 or Elite Group)

These firms dominate Band 1/Tier 1 rankings in corporate/M&A and related commercial areas:

• Allens — Frequently tops or near-tops Corporate/M&A, banking & finance, energy/projects, and restructuring. Strong depth in complex, high-value work across mining, infrastructure, and renewables. Australian independent with a Linklaters alliance for global reach. Offices in Sydney, Melbourne, Brisbane, Perth.

• Herbert Smith Freehills Kramer (HSF Kramer) — Standout for prominent, challenging transactions, M&A, disputes, energy/projects, and cross-border work. Deep bench and blue-chip client base. Strong global integration. Major presence in Sydney, Melbourne, Brisbane, Perth.

• Gilbert + Tobin — Excellent for M&A (especially private equity and tech), competition/antitrust, and efficient, commercially pragmatic advice. Highly regarded for lean teams on sophisticated deals. Strong in Sydney, Melbourne, Perth.

• Mallesons (formerly King & Wood Mallesons) — Top-tier in M&A, capital markets, funds, and corporate finance. Handles major listed company work and has solid cross-border capability. Offices across Sydney, Melbourne, Brisbane, Perth, Canberra.

• Ashurst Perkins Coie (Ashurst) — Strong in energy/resources, finance, M&A (public and private), and disputes. Good global network post-merger activity. Offices in key cities including Sydney, Melbourne, Brisbane, Perth.

• Clayton Utz — Reliable for commercial litigation, construction/infrastructure, government work, and broader corporate matters. Long history and practical approach. Widespread offices.

• Corrs Chambers Westgarth — Highly regarded for transactions, projects, complex disputes, and real estate/commercial work. Independent Australian firm with a strong reputation.

• MinterEllison — One of the largest by headcount; strong across corporate/M&A, government, insurance, health, and restructuring. Often ranks highly in client attraction surveys. Broad national footprint.

Other Notable Mentions

• Arnold Bloch Leibler — Boutique powerhouse for corporate/M&A, especially high-profile deals and restructuring/insolvency.
• Mid-market or strong performers in specific areas: Johnson Winter Slattery, Baker McKenzie, DLA Piper, Hall & Wilcox, Mills Oakley, and Gadens — these are commonly used by SMEs, mid-sized businesses, or for more cost-effective/commercial work.

Key Context for Choosing One

Rankings come from peer and client feedback on legal ability, commercial awareness, and deal involvement. The "Big 8" (or similar groupings) lead on profit and high-end work, while larger or mid-sized firms often win on scale or specific sectors.

"Best" depends on your needs — e.g., resources/energy (Allens, Ashurst, HSF), tech/M&A (Gilbert + Tobin), big-ticket public deals (HSF, Gilbert + Tobin, Mallesons), or disputes/litigation (Clayton Utz, HSF). Location matters too (Sydney/Melbourne dominate, but Perth/Brisbane strong for resources).

For everyday commercial contracts, smaller deals, or local advice, many businesses also use strong regional or mid-tier firms like Piper Alderman, Thomson Geer, or HWL Ebsworth, which appear frequently in Best Lawyers rankings.

If you're after recommendations for a specific industry, deal size, city, or budget, give more details and I can narrow it down. Always check current rankings or speak to a few for a pitch, as relationships and fit are key in Australia.