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SHAREHOLDER CLASS ACTIONS IN AUSTRALIA: UNCERTAINTY FOR THE FUTURE OF MARKET-BASED CAUSATION

SHAREHOLDER CLASS ACTIONS IN AUSTRALIA: UNCERTAINTY FOR THE FUTURE OF MARKET-BASED CAUSATION

The following article was contributed by Nikki Stever and Madison Smith of Australia-based commercial law firm, Piper Alderman. In the third decision delivered in a shareholder class action in Australia,[1] Iluka Resources Limited (ASX: ILU), (Iluka) succeeded in its defence of a lawsuit[2] which failed to prove that the shareholders’ direct reliance on Iluka’s conduct caused their losses. However, the decision in favour of Iluka notably lacked any significant consideration of the second causation argument typically pleaded in shareholder class actions – market-based causation. Background of the matter Iluka is a large mining company and global supplier of mineral sand products. On 9 July 2012, Iluka revised its sales guidance for its products, resulting in a 25% drop in share price. The shareholders alleged that Iluka’s sales guidance leading up to its announcement:
  1. was misleading or deceptive; and
  2. breached their continuous disclosure obligations.
The lead applicant purported that reliance on the sales guidance impacted their decision to purchase shares in the company (direct reliance).  It is not clear to the authors if the lead applicant or shareholders pleaded that the market as a whole was impacted by the sales guidance (market-based causation). The Federal Court of Australia (FCA) rejected both claims on the basis that the representations alleged were not actually made, and were merely statements/guidance about Iluka’s expectations and were not guarantees or predictions/forecasts of future performance. The FCA also found that the lead applicant relied on various external stock reports rather than statements made by Iluka, causing the direct reliance case to fail. Direct reliance and market-based causation Direct reliance in a shareholder class action requires the claimant to prove they actually relied on the contravening conduct (i.e. statements) when deciding to acquire shares in the defendant company, and that the subsequent decrease in share price was directly related to the contravening conduct, resulting in loss to the shareholder. Market-based causation is based on establishing that the price that the defendant’s shares traded on the market was inflated by the contravening conduct, such that the claimant prima facie suffered loss by paying an increased price for the shares. The Court has accepted this proposition,[3] however, also suggested that it may still be necessary for individual shareholders to give evidence that, but for the contravention by an entity, they would not have purchased the shares (or not at the price paid) in order to establish loss.[4] Causation and loss in Iluka Because the Court found that no representations were made (and therefore they were not capable of being relied upon, either directly or by the market), the judgment was relatively quiet in relation to causation. While there is reference to the failed direct reliance case, in so far as it was held that the lead applicant did not rely on the sales guidance issued by Iluka when deciding to purchase the shares, unusually the judgment is completely silent on market-based causation. In previous cases where market-based causation has been alleged by the plaintiff, the but for test has been discussed by the FCA in the context of considering misleading or deceptive conduct claims.  For example, the alleged contraventions in Myer and Re HIH were assessed by considering whether the alleged loss would not have occurred but for the contraventions.[5] The High Court in Australia has offered an alternative approach in cases of proving factual causation of misleading and deceptive conduct generally – the ‘a factor’ test.[6] The a factor test is satisfied if the misleading or deceptive conduct was a factor in the occurrence of the plaintiff’s loss, or in other words materially contributed to the plaintiff’s loss. In Iluka, this test for market-based causation would be satisfied if the alleged contraventions materially contributed to the shareholders’ loss, rather than the more stringent test of whether the contraventions were necessary for the loss. The a factor test, if adopted, arguably offers a more appropriate test for market-based causation in cases of misleading or deceptive conduct. Firstly, it is more reliable and intuitive.[7] For example, the but for test requires counterfactual speculation as to how a market would have responded but for a particular event. This can be a difficult exercise for a plaintiff to speculate and quantify the loss. The a factor test shifts the requirements from necessity to contribution and is not as easily defeated by a claim that it was not the only factor relevant to the plaintiff’s loss. Secondly, the test also avoids duplicative causation, as market-based causation often involves multiple factors that could have affected share prices.[8] The court does not need to assess each separate factor and consider its relative relevance to the causal loss overall, as is required when assessing the causal conduct following the but for test. Finally, the a factor test promotes the deterrence of all misleading or deceptive conduct by providing a broad opportunity for the conduct to be considered misleading or deceptive, regardless of whether it was necessary for the loss.[9] Conclusion By failing to address market-based causation, the Iluka decision has created uncertainty around what causal test the court would be willing to accept for shareholders to succeed with a market-based causation claim. It is only a matter of time before there is a substantial decision on this point, however, until this occurs, the law on market-based causation remains unsettled. About the Authors Nikki Stever, Special Counsel  — Nikki specialises in complex litigation and disputes, with an emphasis on class actions and disputes involving corporations, competition and consumer legislation and disputes concerning breaches of trust and fiduciary duties. Nikki frequently works with litigation funders and is experienced in the structuring and conduct of funded litigation, across all Australian jurisdictions. Madison Smith, Lawyer  — Madison is a litigation and dispute resolution lawyer at Piper Alderman with a primary focus on corporate and commercial disputes. Madison is involved in a number of large, complex matters in jurisdictions across Australia. For queries or comments in relation to this article please contact Kat Gieras, Litigation Group Project Coordinator | T: +61 7 3220 7765 | E:  kgieras@piperalderman.com.au — [1] Following Crowley v Worley Limited [2020] FCA 1522 and TPT Patrol Pty Ltd as trustee for Amies Superannuation Fund v Myer Holdings Ltd [2019] FCA 1747. [2] Bonham v Iluka Resources Ltd [2022] FCA 71. [3] In the matter of HIH Insurance Limited (In Liquidation) [2016] NSWSC 482; TPT Patrol Pty Ltd as trustee for Amies Superannuation Fund v Myer Holdings Ltd [2019] FCA 1747. [4] TPT Patrol Pty Ltd as trustee for Amies Superannuation Fund v Myer Holdings Ltd [2019] FCA 1747, [1671]. [5] In the matter of HIH Insurance Limited (In Liquidation) [2016] NSWSC 482; TPT Patrol Pty Ltd as trustee for Amies Superannuation Fund v Myer Holdings Ltd [2019] FCA 1747. [6] Henville v Walker [2001] HCA 52, [61] and [106]. [7] Henry Cooney, Factual causation in cases of market-based causation (2021) 27 Torts Law Journal 51. [8] Ibid. [9] Ibid.

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Courmacs Legal Leverages £200M in Legal Funding to Fuel Claims Expansion

By John Freund |

A prominent North West-based claimant law firm is setting aside more than £200 million to fund a major expansion in personal injury and assault claims. The substantial reserve is intended to support the firm’s continued growth in high-volume litigation, as it seeks to scale its operations and increase its market share in an increasingly competitive sector.

As reported in The Law Gazette, the move comes amid rising volumes of claims, driven by shifts in legislation, heightened public awareness, and a more assertive approach to legal redress. With this capital reserve, the firm aims to bolster its ability to process a significantly larger caseload while managing rising operational costs and legal pressures.

Market watchers suggest the firm is positioning itself not only to withstand fluctuations in claim volumes but also to potentially emerge as a consolidator in the space, absorbing smaller firms or caseloads as part of a broader growth strategy.

From a legal funding standpoint, this development signals a noteworthy trend. When law firms build sizable internal war chests, they reduce their reliance on third-party litigation finance. This may impact demand for external funders, particularly in sectors where high-volume claimant firms dominate. It also brings to the forefront important questions about capital risk, sustainability, and the evolving economics of volume litigation. Should the number of claims outpace expectations, even a £200 million reserve could be put under pressure.

Katch Liquidates Consumer Claims Fund Amid Mounting Delays and Pressure

By John Freund |

Katch Fund Solutions, one of the most prominent players in consumer litigation funding, has placed its consumer claims fund into liquidation.

According to Legal Futures, the move comes in response to mounting liquidity pressures caused by prolonged delays in resolving motor-finance claims and increased uncertainty surrounding major group litigation efforts. The Luxembourg-based fund confirmed it is winding down the portfolio and returning capital to investors on a pro-rata basis.

Katch had been a key backer of large-scale consumer legal claims in the UK, supporting firms such as SSB Law and McDermott Smith Law. Both firms ultimately collapsed, with SSB Law owing £63 million including £16 million in interest, and McDermott Smith Law owing £7 million. Katch’s portfolio also included a substantial stake in the ongoing “Plevin” litigation, a group of cases alleging unfair undisclosed commissions tied to the sale of payment protection insurance. That litigation, initially estimated at £18 billion in value, suffered a blow earlier this year when the High Court declined to grant a group litigation order, further delaying resolution timelines.

The firm’s consumer claims fund held over £400 million in assets as of mid-2025, but was hit hard by increasing investor redemption requests. Katch’s team cited concerns that payouts from major motor-finance cases could be delayed until 2026 or later due to regulatory and judicial developments. With limited short-term liquidity options, the fund concluded that an orderly wind-down was the only viable path forward.

Omni Bridgeway Backs New Zealand Class Action Against Transpower, Omexom

By John Freund |

Omni Bridgeway is backing a newly launched class action in New Zealand targeting Transpower New Zealand Limited and its contractor Omexom, following a major regional blackout that occurred in June 2024.

According to Omni's website, the outage, which affected approximately 180,000 residents and 20,000 businesses across Northland, was triggered by the collapse of a transmission tower near Glorit during maintenance activity conducted by Omexom.

Filed in the High Court in Wellington by law firms LeeSalmonLong and Piper Alderman, the case alleges negligence on the part of both defendants. The plaintiffs claim that Transpower failed to adequately oversee the maintenance, and that Omexom mishandled the work that led to the tower’s collapse.

The class action is proceeding on an opt-out basis, meaning all impacted Northland businesses are automatically included unless they choose otherwise. Under Omni Bridgeway’s funding model, there are no upfront costs to class members, and fees are contingent on a successful outcome.

The economic impact of the outage has been pegged between NZ$60 million and NZ$80 million, according to various estimates, with businesses reporting power losses lasting up to three days and in some cases longer. In the aftermath of the blackout, Transpower and Omexom jointly contributed NZ$1 million to a resilience fund for affected communities, a figure the plaintiffs argue is woefully inadequate compared to the losses incurred.