Competition & Antitrust

At the cutting edge of complex competition and regulatory issues

Most industries are facing into a world of increasing regulation, emerging markets and new opportunities, changing customer preferences and activist regulators.

We stand at the forefront of competition and regulatory issues, navigating evolving policy, regulatory and industry landscapes to deliver the best outcomes for our clients. 

Our passion for our clients’ businesses means that we are always attuned to your strategic objectives and commercial imperatives when navigating a pathway through complex competition and regulatory challenges.  We offer deep insights that stretch beyond the law, gained through our strong relationships with regulators and active participation in policy debates at all levels. 

Our globally recognised elite practice encompasses all aspects of competition and consumer law, as well as related regulation, compliance and market studies.

We assist clients across all industry sectors, including:

  • Financial services
  • Telecommunications
  • Technology
  • Consumer and retail
  • Energy and resources
  • Agribusiness and food
  • Transport and infrastructure
  • Healthcare and pharmaceuticals.  

Our expertise in action

Our landmark and recent experience includes acting on:

  • Merger control: Google’s acquisition of Fitbit; BPay/eftpos/NPPA payment platform merger; NAB’s acquisition of neo bank 86 400; Willis Towers Watson’s merger with Aon.
  • Cartels: Norcast v Bradken; ACCC v Flight Centre; ACCC v Yazaki; ANZ capital raising criminal cartel action.
  • Consumer protection: ACCC prosecutions of Medibank Private, Samsung, Kimberly Clarke Australia, Telstra and Onavo Inc, as well as defending Telstra, LG and Proctor & Gamble in private actions alleging misleading conduct.
  • Regulatory market studies: all recent major ACCC market studies/inquiries including the Digital Platforms Inquiry; Digital Advertising Services Inquiry; Digital Platform Services Inquiry; Electricity Market monitoring; Gas Inquiry; Retail Electricity Inquiry; Dairy Inquiry; Perishable Agricultural Goods Inquiry; Residential Mortgage Inquiry; Home Loan Inquiry; Foreign Currency Conversion Services Inquiry; Murray-Darling Basin Water Markets Inquiry.
  • Access and infrastructure regulation: access and infrastructure arrangements and disputes, including reviews of essential infrastructure regulation across energy, telecommunications, rail, ports, transport, airports and water.
Our Expertise in Competition & Antitrust
Explore All Expertise
Industry Recognition
  • Band 1, Competition/Antitrust
    Chambers and Partners Australia 2025
  • Tier 1, Competition and Trade
    Legal500 Australia 2025
  • Elite
    GCR100 Australia 2025
Testimonials
  • KWM (Mallesons) has significant depth in its practice. All its lawyers have experience handling complex and sophisticated matters.
    Chambers and Partners Asia-Pacific 2025
  • Deep bench strength in competition law and a good perception of the ACCC's likely view on a transaction.
    Legal500 Australia 2025
  • KWM (Mallesons) is adept at handling complex and sophisticated matters, often under tight deadlines. It is able to partner well with different stakeholders and provide advice which is pragmatic and to the point.
    Chambers and Partners Asia-Pacific 2025
  • A conspicuously loyal clientele benefits from the firm's in-depth knowledge of the ACCC, State and Commonwealth regulatory bodies and industry associations.
    Chambers and Partners Asia-Pacific
  • Very astute and really intelligent lawyers, who are really ahead of the game and able to see what's going on globally.
    Chambers and Partners Asia-Pacific

Latest Thinking

Insight

Merger reform: one quarter in - the good, the bad and the ugly

After one quarter of the new mandatory ACCC notification regime, what is the good, the bad and the ugly for financial sponsors?

29 April 2026

Insight

New ACCC mandatory notification thresholds commence: bright-line voting power & standalone asset thresholds

In December 2025, the Government announced late-breaking changes to Australia’s new mandatory merger clearance regime, introducing new notification thresholds, filing triggers, and exemptions.

01 April 2026

Insight

ACCC Merger Clearance: letters from the front

1 January 2026 brought with it the most fundamental and sweeping changes to Australia’s competition merger control regime since the Trade Practices Act was introduced by the Whitlam Government in 1974.

12 March 2026

Insight

Regulation, rigor and responsibility - The ACCC's expectation in 2026

In a wide-ranging address today to the Committee for Economic Development of Australia in Sydney, the ACCC Chair Gina Cass-Gottlieb outlined the competition and consumer regulator’s enforcement and compliance priorities for the next 12 months.

19 February 2026

Insight

Unfair trading practices: Arriving mid-2027 – but UTP-style enforcement has already landed

Yesterday, the Government released exposure draft legislation to introduce a general prohibition against unfair trading practices and specific obligations to address subscription traps and drip pricing.

10 February 2026

Insight

Changes to ACCC Merger Clearance Regime – New thresholds, exemptions and triggers

The Government today released details of late-breaking changes to Australia’s new ACCC mandatory notification regime – introducing new notification thresholds, filing triggers, and exemptions.

18 December 2025

Publication

DealTrends

Welcome to KWM’s DealTrends in FY24 and FY25, our annual market report on Australian Private M&A deals between 1 July 2023 and 30 June 2025.

11 December 2025

Insight

Navigating Australia’s evolving M&A regulatory landscape: a strategic playbook for financial sponsors

It will not have escaped those participating in Australia’s M&A ecosystem that the regulatory burden has evolved substantially, particularly over the last 5 to 10 years. The days of a single relatively administrative filing obligation, and possibly a couple of informal chats with industry and market regulators to confirm positions, have for most participants long disappeared. Today, the M&A regulatory framework is significantly more complex and dynamic. For those participating, it now offers less upfront clarity, takes longer and costs more to navigate.

15 August 2025

Insight

Second Term’s a Charm: Labor’s ambitions for competition and consumer law reform

The Australian Parliament is due to resume on 22 July 2025 for the first time since the Labor Government was re-elected for a second term in the May 2025 federal election.

21 July 2025

Insight

Answering (some of) the threshold questions: Treasury releases updated ACCC clearance regime instrument

Treasury released the Competition and Consumer (Notification of Acquisitions) Determination 2025 (Instrument).

01 July 2025

Publication

In Private: April 2025

In Private is your go-to legal guide for private capital dealmaking and portfolio management. This publication is tailored for private capital professionals and dealmakers and covers essential topics and trends that impact your investment strategies.

17 April 2025

Insight

Instrumental changes: Treasury consults on draft notification thresholds instrument

Last Friday, Treasury released the exposure draft of the Competition and Consumer (Notification of Acquisitions) Determination for public consultation.

03 April 2025

Insight

Do we have an understanding? High Court rules against ACCC in appeal regarding anti-competitive understanding

On 2 April 2025, the High Court dismissed the ACCC’s appeals from the Full Federal Court’s decision in the ACCC’s proceedings against J Hutchinson Pty Ltd (Hutchinson) and the CFMEU (Construction, Forestry and Maritime Employees Union).

03 April 2025

Insight

‘Encouraging aspiration, unlocking opportunity, lifting real wages’ – the proposed ban on non-compete clauses

The Government has announced as part of the Budget for 2025/26 that it will introduce a statutory ban on ‘non-compete’ clauses for workers earning less than $175,000, to take effect from 2027.

26 March 2025

Insight

Same same but different: ACCC releases new merger assessment guidelines for public consultation

The ACCC has released its draft merger assessment guidelines for public consultation. The guidelines outline the ACCC’s approach to analysing the potential effects of mergers on competition under the new mandatory merger clearance regime, which will formally commence on 1 January 2026.

21 March 2025

Insight

Managing government business - Australia’s new competition agreement

Last week, the Australian Government published the Intergovernmental Agreement on National Competition Policy (New Agreement) which will revamp many aspects of the National Competition Principles in the Competition Principles Agreement 1995 (Existing Principles).

13 March 2025

Insight

Merger clearance reform: ACCC transitional guidelines released

The ACCC today released guidelines on the transition to the new merger clearance regime

04 March 2025

Insight

Concentrating on concentration – ACCC to focus on oligopolies and merger law reform in 2025

ACCC Chair Gina Cass-Gottlieb has emphasised the growing challenge posed by market concentration across the Australian economy, particularly in sectors such as supermarkets, retail, aviation and digital platforms, as part of the ACCC’s enforcement priorities for 2025.

20 February 2025

Insight

The new order begins: Merger Clearance Reform passes Parliament

Federal Parliament has passed legislation to establish a new mandatory and suspensory merger clearance regime.

29 November 2024

Insight

Australian Merger Clearance Reforms | Impacts for M&A

The Government has introduced into Parliament the Bill for the new merger control regime. It sets out the legal framework for the new regime, including what types of transactions cannot proceed without ACCC clearance, the timeframes for the ACCC’s review and the appeal rights from any ACCC decision.

12 November 2024

Insight

Australia’s Merger Reforms: what it means for commercial real estate deals

The Australian Government has proposed a new merger control regime replacing the existing voluntary informal notification and authorisation process regimes with a mandatory and suspensory clearance regime.

30 October 2024

Insight

Surcharges in the spotlight – RBA’s regulatory review

In one of a string of measures designed to lessen cost of living pressures ahead of next year’s election, the Australian Government has announced its proposal to ban debit card surcharges levied by retailers from 1 January 2026, subject to a review of the retail payments framework by the Reserve Bank of Australia (RBA).

23 October 2024

Insight

The eagle has landed - New Merger Reform Bill introduced into Parliament today

oday, the Government introduced into Parliament the much anticipated Bill for its proposed new mandatory ACCC merger clearance regime.

10 October 2024

Insight

Is my deal caught? Government releases draft merger thresholds

The Government has today released details of the proposed thresholds above which merger parties will be required to obtain ACCC clearance under the new mandatory and suspensory merger clearance regime.

30 August 2024

Insight

Australian merger control overhaul: 6 key takeaways from the draft merger reform legislation (including some surprises)

Yesterday, the Government released exposure draft legislation for its proposed new merger clearance regime.

25 July 2024

Insight

7 Takeaways for Businesses from the ACCC’s Draft Guide on Sustainability Collaboration

In this update we identify 7 key takeaways for businesses wanting to collaborate to achieve sustainability outcomes, including a new streamlined authorisation process for particular types of collaboration.

09 July 2024

Insight

Merger clearance reforms - what you need to know

Existing informal process and merger authorisation regime to be replaced by new mandatory and suspensory clearance regime with significant changes including to the legal test and appeal process.

25 June 2024

Insight

Holistic merger reform is coming – What is the impact on private capital deals?

Under proposed changes announced this week, Australia’s existing merger laws - which are currently premised on a voluntary notification system - will do a 180 degree pivot to a mandatory and suspensory regime.

15 April 2024

Insight

Stop right there: Australia’s merger regime set to change

Today, the government announced its proposal to overhaul Australia’s merger laws.

10 April 2024

Insight

Easing cost of living: ACCC announces 2024 enforcement priorities, with a focus on consumers

The ACCC Chair, Gina Cass-Gottlieb, today unveiled the ACCC’s enforcement priorities for 2024-25. Consistent with issues of concern to many Australians, those priorities focus on addressing cost of living pressures, and practices that harm disadvantaged members of the community.

07 March 2024

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Latest News

Deals

Mallesons advises Regis Resources on A$10.7 billion gold sector merger with Vault Minerals

Mallesons has advised Regis Resources Limited (ASX:RRL) on its proposed merger of equals with Vault Minerals Limited (ASX:VAU), to create Australia's third largest primary ASX-listed gold producer with a pro forma market capitalisation of approximately A$10.7 billion.

11 May 2026

Deals

KWM advises Pepper and its consortium partners on landmark $21.4B RAMS portfolio acquisition

King & Wood Mallesons (KWM) is proud to have advised Pepper Money Limited (Pepper) and its consortium partners on their agreement to acquire Westpac’s $21.4 billion RAMS home loan portfolio.

11 November 2025

Firm News

KWM attracts merger reform leader from ACCC

Asia’s top tier international law firm, King & Wood Mallesons (KWM), has announced the appointment of Australian Competition Partner Jennifer Barron.

30 April 2025

Deals

KWM advises Newmont on $A26b acquisition of Newcrest

King & Wood Mallesons is delighted to be supporting Newmont in its acquisition of Newcrest Mining by scheme of arrangement.

16 May 2023

NEWS

KWM Advises On Innovative Blockchain-Enabled Local Energy Marketplace

King & Wood Mallesons (KWM) has worked with LO3 Energy and other industry partners to publish the Latrobe Valley Microgrid Feasibility Study, an Australian Renewable Energy Agency (ARENA) funded project that will determine the feasibility of a local energy marketplace in the Latrobe Valley.

11 September 2019

NEWS

KWM Helps to Bring Australia's First Smartbank to Market

King & Wood Mallesons (KWM) has worked with Australia's newest bank and first smartbank, 86 400, with regard to licensing approval from ASIC.

28 July 2019

NEWS

KWM promotes exceptional number of Special Counsel and Senior Associates in Australia

King & Wood Mallesons is proud to announce the promotion of 17 special counsel and 59 senior associates in Australia, from 1 July 2018.

29 June 2018

NEWS

KWM named Law Firm of the Year for Competition and Corporate Law by Best Lawyers

King & Wood Mallesons (KWM) has been named Law Firm of the Year in the practice areas of Competition and Corporate Law in the 2019 edition of Best Lawyers.

13 April 2018

NEWS

King & Wood Mallesons recognised as Elite firm

King & Wood Mallesons' (KWM) Australian Competition team has once again been recognised as an Australian Elite firm in Global Competition Review's 18th GCR 100, an annual guide to the most trusted firms for competition work world-wide.

09 April 2018

NEWS

King & Wood Mallesons' Competition team receives elite global recognition

King & Wood Mallesons' (KWM) Australian Competition team has cemented its position as an industry leader, with recent recognition in Global Competition Review's (GCR) Global Elite directory guide and Chambers' 2017 Asia Pacific firm rankings.

13 January 2017

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Our Experts in Competition & Antitrust

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