How Australia defines and polices trading on inside information

Insider trading is prohibited in Australia by Division 3 of Part 7.10 of the Corporations Act 2001. The core offence sits in section 1043A, which ASX guidance summarises as prohibiting a person from trading in securities while in possession of inside information. It is not limited to directors or senior staff. It binds anyone holding the information.

That shapes how you read market data here. Australia regulates insider trading mainly by prohibiting and punishing it. The United States does that as well, but it also makes company insiders file their own trades with the SEC inside a tight window. That creates a public record with no close Australian equivalent.

What follows is general information about how the rules work. It is not legal advice.

The prohibition, and who it binds

Section 1043A reaches further than trading. Procuring somebody else to trade is caught, and so in some cases is communicating the information to another person. ASIC has laid charges under section 1043A(1) for trading while in possession of inside information and under section 1043A(2) for communicating it.

Penalties are serious. ASIC states that in March 2019 the maximum for an individual rose to 15 years imprisonment and a fine expressed in penalty units, with an alternative of three times the benefit derived. Penalty unit values change over time, so the figure that applies is the one in force when the conduct occurred.

What counts as inside information

Two elements must be satisfied. The information must not be generally available, and if it were generally available, a reasonable person would expect it to have a material effect on the price or value of the financial product. That is how ASIC defines inside information in its own trading policy.

The materiality test sits in section 1042D. ASX guidance observes it is similar to the continuous disclosure test in section 677, which asks whether the information would, or would be likely to, influence persons who commonly invest in securities. Information does not need to be certain or formally signed off to qualify.

What ASX listed companies have to disclose

Listing Rule 3.1 is the continuous disclosure obligation. Once an entity is or becomes aware of information concerning it that a reasonable person would expect to have a material effect on the price or value of its securities, the entity must immediately tell ASX. ASX guidance says "immediately" means promptly and without delay rather than instantaneously, as quickly as it can be done in the circumstances.

Listing Rule 3.1A carves out a narrow exception covering five situations, such as an incomplete proposal or negotiation, matters of supposition, internal management information and a trade secret. It applies only while the information stays confidential and a reasonable person would not expect it to be disclosed.

Parliament gave Listing Rule 3.1 statutory force in section 674 of the Corporations Act, so a company sitting on price sensitive information is exposed on two fronts at once.

Director interest notices and substantial holdings

Australia does disclose director share dealings. It just does it differently.

Listing Rule 3.19A puts the obligation on the entity, not the director. Appendix 3X covers interests on appointment, Appendix 3Y a change, and Appendix 3Z the position when a director leaves. Each must reach ASX no more than five business days after the event, and an Appendix 3Y must state whether the change fell in a closed period and whether prior written clearance was given. Listing Rule 3.19B makes the entity put arrangements in place with its directors and enforce them. Section 205G adds a separate duty on the director to notify the market operator within 14 days, with relief where the company has already complied for them.

Above board level, section 671B requires a substantial holding notice. ASIC guidance puts the threshold at 5 per cent or more of the total votes attached to voting securities, with further notices on a disclosable movement or when the person ceases to be a substantial holder. It goes to the listed entity and the market operator within two business days of the holder becoming aware. Listing Rules 12.9 to 12.12 separately require a trading policy for key management personnel, including closed periods and prior written clearance.

Who enforces the rules

ASIC is responsible for the supervision of real time trading on Australia's domestic licensed markets and conducts surveillance across it. Criminal briefs go to the Commonwealth Director of Public Prosecutions. ASIC can also take the civil route: in 2021 it commenced Federal Court proceedings alleging a contravention of section 1043A and sought declarations and pecuniary penalties rather than charges.

Why US insider trades are trackable and ASX director activity is harder to follow

This is the structural difference, and the reason this site covers US filings.

Under section 16(a) of the Securities Exchange Act of 1934, US officers, directors and holders of more than 10 per cent of any class of a company's securities report their own transactions. A Form 4 must be filed before the end of the second business day following the day of the transaction, lodged electronically through the SEC's EDGAR system, and the form states the information disclosed is a matter of public record available for inspection by members of the public. Form 3 captures a starting position within 10 days of becoming an insider, and Form 5 picks up anything not reported earlier, generally within 45 days of financial year end.

So in the US there is a standardised, individual filing, lodged by the insider, within two business days, in one central public place. That is what makes insider buying a dataset you can screen and score, not a story you hear afterwards. The same architecture is why congressional trade disclosures can be followed.

Australia differs in four ways that matter. The filing comes from the company, not the director. The deadline is five business days rather than two. It covers directors, not officers and large shareholders. And it arrives as a company announcement instead of a standardised feed with a consistent structure across every listed entity. An Australian investor can read any Appendix 3Y. What they cannot easily do is treat the whole market's director activity as one clean, timely, comparable dataset.

How InsiderPulse handles this

InsiderPulse reads SEC Form 4 insider filings and US congressional trade disclosures alongside options activity, dark pool and volume data, prices and news, and turns them into a 0 to 100 score for each asset it covers. Coverage is US listed stocks and ETFs plus crypto, forex and commodities, not ASX shares, so nothing here is a view on an Australian company. Our products page lists what is included, and the note on AI investing tools in Australia covers how Australian users work with it.

InsiderPulse is a data tool. Nothing on this page is financial advice.