Brambles and continuous disclosure: lessons for listed entities on earnings guidance

The recent Federal Court decision in Southernwood v Brambles Limited (No 3) [2026] FCA 418 reflects an increasingly forensic judicial and exacting judicial approach to the review of boardroom forecasting and disclosure decisions. Although the decision does not alter the statutory framework governing continuous disclosure, it provides important guidance on how courts may assess the boundary between legitimate commercial judgment and legal liability, including what will (and will not) constitute a ‘reasonable basis’ for earnings guidance in practice when listed entities communicate financial expectations to the market.

At its heart, the case is not about a novel legal principle. Rather, it concerns when ordinary forecasting and disclosure judgment crosses the line into actionable misconduct. The decision is therefore likely to be of particular interest to boards, CFOs, general counsel and investor relations teams involved in preparing or maintaining market guidance.

Disclosure is not a static exercise

Perhaps the most important practical lesson from Brambles is that disclosure is not a ‘set and forget’ exercise.

Importantly, the Court’s reasoning makes clear that the existence of reasonable grounds is not a fixed, binary question determined at the time guidance is first given. Rather, reasonable grounds may erode over time as new information emerges. A forecast that is supportable at one point may cease to be so as actual performance diverges from underlying assumptions.

The Court accepted that guidance which is supportable when initially announced may become misleading if maintained after the assumptions underpinning it cease to be reasonably supportable. Murphy J held that although Brambles’ August and October 2016 guidance was not shown to be misleading when given, by November 2016 there were no longer reasonable grounds to maintain aspects of that guidance in light of deteriorating operating performance and increasingly unrealistic recovery assumptions. 

This reinforces that continuous disclosure compliance is not limited to the moment guidance is released. Once financial expectations are communicated to the market, listed entities must continually assess whether those expectations remain supported by reasonable grounds.

In practical terms, this requires ongoing reassessment of whether there remains an objectively reasonable basis for the guidance, having regard to actual trading performance, including whether:

• assumptions underpinning earnings guidance remain realistic;
   
• recovery plans are evidence-based rather than aspirational;
   
• deteriorating trends have undermined previously disclosed expectations; and
   
• market guidance should be revised, withdrawn or qualified.

Courts will closely scrutinise forecasting judgments

A striking feature of the judgment is the intensity with which the Court scrutinised Brambles’ internal forecasting and budgeting processes. A central theme in that analysis is that a ‘reasonable basis’ must be anchored in operational reality, not merely internal consensus or the existence of a formally approved budget or forecast. The Court’s focus was not on whether Brambles had undertaken a forecasting process, but whether the assumptions underpinning that process remained objectively supportable in light of observed performance.

Murphy J undertook a detailed examination of management budgets, reforecasts, recovery plans and monthly trading performance to determine whether Brambles had reasonable grounds to continue maintaining its earnings guidance. Particular criticism was directed at management’s reliance on projected second-half "hockey stick" recovery notwithstanding repeated underperformance against budget in the first half, with the Court finding aspects of that recovery to be unrealistic and unsupported by operational reality. Projections which effectively assumed that earlier shortfalls would be “made up” later in the year were treated as insufficient unless supported by concrete evidence of achievability, rather than aspirational or target-driven assumptions.

The message for listed entities is clear: courts are willing to interrogate in considerable detail whether management assumptions reflected genuine commercial analysis or impermissible optimism. Importantly, the Court did not suggest that companies cannot adopt ambitious budgets or stretch targets. To the contrary, Murphy J expressly acknowledged that “[a]ggressive budgets are a part of commercial life”: at [4]. The difficulty arises where disclosed guidance depends upon assumptions that become detached from operational reality, or where the margin for error is so narrow that even minor underperformance renders the guidance untenable. 

The decision also highlights that identifying risks is not sufficient; those risks must be properly integrated into the forecast itself. A reasonable basis requires that known cost pressures, pipeline weakness or execution risks are reflected in the underlying assumptions, rather than treated as contingencies sitting outside the numbers. The decision also confirms that generic or boilerplate disclaimers are unlikely to neutralise the misleading effect of earnings guidance where the underlying assumptions lack a reasonable basis.

The decision sharpens the focus on board oversight

The judgment also reflects a broader judicial willingness to scrutinise disclosure decisions as matters of governance and oversight, not merely technical compliance.

While management will ordinarily prepare forecasts and monitor performance, Brambles demonstrates that the board’s oversight role in relation to disclosure judgments may come under significant forensic scrutiny where guidance later proves inaccurate. The Court’s analysis also highlights the importance of effective information flows to the board, with deficiencies in management reporting capable of indicating broader shortcomings in governance and oversight. The Court closely examined the extent to which Brambles’ board was informed of deteriorating trading conditions, understood the risks associated with the assumptions underpinning management forecasts, and actively considered whether guidance should be downgraded: see [2823]–[2848].

Boards should therefore ensure that governance frameworks facilitate robust escalation of emerging issues, permit genuine challenge of management assumptions and ensure that the board is satisfied that any guidance maintained in the market continues to be supported by a reasonable and evidence-based foundation.

Implications for the business judgment debate

More fundamentally, the decision raises broader policy questions regarding the extent to which directors should be protected when making disclosure decisions involving inherently predictive commercial judgment.

Whether to maintain, revise or withdraw earnings guidance often requires directors to make evaluative decisions under uncertainty, balancing incomplete information, competing forecasts and rapidly changing business conditions. The challenge is that these are inherently judgmental decisions made in real time. If guidance is maintained for too long and later proves inaccurate, those same judgments may be recast, with the benefit of hindsight, as misleading conduct or a failure to comply with continuous disclosure obligations. In that sense, the current legal framework tends to characterise what are, in substance, business judgments about forecasting and performance as disclosure or compliance failures, rather than decisions to which the usual deference for commercial judgment would ordinarily apply.

Brambles should be a rallying call to the debate about whether disclosure decisions should attract broader protection under the business judgment rule or a comparable safe harbour framework. In the United States, courts have long recognised that forward-looking statements involve inherently uncertain, evaluative judgments and have been reluctant to second-guess them with the benefit of hindsight, where made in good faith. That protection does not amount to immunity. Rather, it operates alongside a distinct doctrine of board oversight which focuses on whether directors have ensured that appropriate systems exist to monitor risk and performance.

The broader context: awaiting the High Court in Zonia

The significance of Brambles is heightened by the High Court’s forthcoming decision in Zonia Holdings Pty Ltd v Commonwealth Bank of Australia.

While Zonia concerns different legal issues - principally the nature of causation and shareholder loss in securities litigation - it is expected to further shape the framework governing shareholder claims arising from disclosure-related contraventions. The Brambles decision is also significant in that the Court applied a market-based causation model to award shareholder loss, reinforcing the litigation risk associated with disclosure failures. Taken together, Brambles and the forthcoming Zonia decision suggest that 2026 may prove to be a pivotal year in the continued development of Australian securities litigation jurisprudence.

It should also be remembered that Brambles was determined by reference to disclosure events arising before the significant 2021 amendments to Australia’s continuous disclosure regime. Those reforms introduced a fault-based element for many civil penalty and private compensation claims, requiring proof that the disclosing entity acted with knowledge, recklessness or negligence in relation to the relevant non-disclosure or misleading disclosure.

Under the Caremark line of authority, directors may incur liability where they fail to implement or properly monitor systems capable of bringing material risks to the board’s attention. More recent decisions have emphasised the need for structured reporting on ’mission-critical’ risks central to the business. Seen through that lens, the question in a case like Brambles would be less whether the forecast ultimately proved wrong, and more whether the board had in place and properly engaged with systems capable of identifying when the guidance was no longer reasonably supportable and required revision or withdrawal.

Key takeaways

The practical lessons from Brambles for listed entities are straightforward:

• earnings guidance should be subject to continual reassessment, not merely initial verification;
   
• management assumptions and recovery plans should be critically tested against actual performance to ensure they remain objectively supportable;
   
• boards should ensure robust governance and escalation processes exist around disclosure decisions;
   
• optimism and aspirational forecasting, without objective support, may not withstand judicial scrutiny; and
   
• the existence of a ‘reasonable basis’ must be reassessed continuously and may diminish as contrary information emerges.

Ultimately, Brambles does not rewrite Australia’s continuous disclosure laws. Its significance lies in clarifying how rigorously courts may scrutinise the application of those laws where forecasting, governance and disclosure judgment intersect.

For listed entities, the decision is a timely reminder that disclosure decisions require not only legal compliance, but disciplined commercial judgment supported by robust and continually tested evidence.