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Mergers & Acquisitions Lawyers

Buying or selling a business is one of the most significant decisions you will ever make. Sierra Legal's M&A lawyers guide businesses through every stage of the transaction process — from initial strategy and due diligence through to negotiation, documentation and completion.

Expert M&A Legal Advice Across Australia

Our M&A team has advised on transactions across a wide range of industries including transport and logistics, technology, retail, resources and professional services. We have acted for buyers, sellers, private equity investors and management teams on deals ranging from small business acquisitions to complex multi-party corporate transactions. We have advised on transactions involving Clark Rubber, Bingo Industries, Creative Cubes, TMX and Medibank — bringing the same depth of care and commercial focus to every matter regardless of size.

Sierra Legal provides a full suite of M&A legal services including:

The New ACCC Merger Regime — What You Need to Know


From 1 January 2026, Australia's merger control regime changed significantly. Qualifying transactions must now be notified to the ACCC and cleared prior to completion. Sierra Legal has been at the forefront of advising clients on these changes. If you are planning an acquisition, we can help you determine whether your transaction requires notification and guide you through the process.

Why Sierra Legal for M&A

We bring the same depth of care and commercial focus to every matter regardless of size. Ready to explore a transaction? Contact Sierra Legal's M&A team today.

Frequently Asked Questions

What does an M&A lawyer do?

An M&A lawyer advises on the legal aspects of buying, selling or merging businesses. This includes conducting due diligence, structuring the transaction, drafting and negotiating transaction documents, managing regulatory requirements and overseeing completion.

How long does an M&A transaction typically take?

The timeline varies depending on the complexity of the transaction. A straightforward business acquisition may take 6–12 weeks from heads of agreement to completion. More complex transactions involving regulatory approvals or multiple parties can take several months.

Do I need to notify the ACCC about my acquisition?

From 1 January 2026, mandatory notification thresholds apply to certain transactions. The thresholds are based on the combined Australian revenue of the parties and the transaction value. Sierra Legal can quickly assess whether your transaction requires notification.

What is vendor due diligence?

Vendor due diligence involves a seller commissioning a legal review of their own business before going to market. This allows issues to be identified and resolved early, reducing the risk of deal delays or price adjustments during the buyer's due diligence process.

Does Sierra Legal advise on cross-border M&A transactions?

Yes. We have experience advising on cross-border transactions and can assist with FIRB approval requirements for foreign investment into Australia.

Talk to us about M&A Today