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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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Litigation Finance Faces Regulatory, MSO, and Insurance Crossroads in 2026

By John Freund |

The litigation finance industry, now estimated at roughly $16.1 billion, is heading into 2026 amid growing uncertainty over regulation, capital structures, and its relationship with adjacent industries. After several years of rapid growth and heightened scrutiny, market participants are increasingly focused on how these pressures may reshape the sector.

Bloomberg Law identifies four central questions likely to define the industry’s near-term future. One of the most closely watched issues is whether federal regulation will finally materialize in a meaningful way. Legislative proposals have ranged from restricting foreign sovereign capital in U.S. litigation to taxing litigation finance returns. While several initiatives surfaced in 2025, political gridlock and election year dynamics raise doubts about whether comprehensive federal action will advance in the near term, leaving the industry operating within a patchwork of existing rules.

Another major development is the expansion of alternative investment structures, particularly the growing use of management services organizations. MSOs allow third party investors to own or finance non legal aspects of law firm operations, offering a potential pathway for deeper capital integration without directly violating attorney ownership rules. Interest in these models has increased among both litigation funders and large law firms, signaling a broader shift in how legal services may be financed and managed.

The industry is also watching the outcome of several high profile disputes that could have outsized implications for funders. Long running, multibillion dollar cases involving sovereign defendants continue to test assumptions about risk, duration, and appellate exposure in funded matters.

Finally, tensions with the insurance industry remain unresolved. Insurers have intensified efforts to link litigation funding to rising claim costs and are exploring policy mechanisms that would require disclosure of third party funding arrangements.

Taken together, these dynamics suggest that 2026 could be a defining year for litigation finance, as evolving regulation, new capital models, and external pushback shape the industry’s next phase of development.

Liability Insurers Push Disclosure Requirements Targeting Litigation Funding

By John Freund |

Commercial liability insurers are escalating their long-running dispute with the litigation funding industry by introducing policy language that could require insured companies to disclose third-party funding arrangements. The move reflects mounting concern among insurers that litigation finance is contributing to rising claim costs and reshaping litigation dynamics in ways carriers struggle to underwrite or control.

An article in Bloomberg Law reports that the Insurance Services Office, a Verisk Analytics unit that develops standard insurance policy language, has drafted an optional provision that would compel policyholders to reveal whether litigation funders or law firms with a financial stake are backing claims against insured defendants. While adoption of the provision would be voluntary, insurers could begin incorporating it into commercial liability policies as early as 2026.

The proposed disclosure requirement is part of a broader push by insurers to gain greater visibility into litigation funding arrangements, which they argue can encourage more aggressive claims strategies and higher settlement demands, particularly in mass tort and complex commercial litigation. Insurers have increasingly linked these trends to what they describe as social inflation, a term used to capture rising jury awards and litigation costs that outpace economic inflation.

For policyholders, the new language could introduce additional compliance obligations and strategic considerations. Companies that rely on litigation funding, whether directly or through counterparties, may be forced to weigh the benefits of financing against potential coverage implications.

Litigation funders and law firms are watching developments closely. Funding agreements are typically treated as confidential, and mandatory disclosure to insurers could raise concerns about privilege, work product protections, and competitive sensitivity. At the same time, insurers have been criticized for opposing litigation finance while also exploring their own litigation-related investment products, highlighting tensions within the market.

If widely adopted, insurer-driven disclosure requirements could represent a meaningful shift in how litigation funding intersects with insurance. The development underscores the growing influence of insurers in shaping transparency expectations and suggests that litigation funders may increasingly find themselves drawn into coverage debates that extend well beyond the courtroom.

Diamond McCarthy Backs Lansdowne Oil Treaty Claim Against Ireland

By John Freund |

US-based litigation funder Diamond McCarthy has agreed to back a high-stakes investment treaty claim brought by Lansdowne Oil and Gas against the Irish state, with the claim reportedly valued at up to $100 million. The dispute arises from Ireland’s policy shift away from offshore oil and gas development, which Lansdowne argues has effectively wiped out the value of its investment in the Barryroe offshore oil field.

According to NewsFile, Lansdowne Oil and Gas, a small exploration company listed in London and Dublin, is pursuing arbitration against Ireland under the Energy Charter Treaty. The company alleges that Ireland’s 2021 decision to halt new licences for offshore oil and gas exploration, followed by regulatory actions affecting existing projects, breached treaty protections afforded to foreign investors. Lansdowne contends that these measures frustrated legitimate expectations and amounted to unfair and inequitable treatment under international law.

Diamond McCarthy’s involvement brings significant financial firepower to a claim that would otherwise be difficult for a junior energy company to pursue. The funder will cover legal and arbitration costs in exchange for a share of any recovery, allowing Lansdowne to advance the case without bearing the full financial risk. The arbitration is expected to be conducted under international investment dispute mechanisms, with proceedings likely to take several years.

Ireland has previously defended its policy changes as part of a broader climate strategy aimed at reducing fossil fuel dependence and meeting emissions targets. Government representatives have indicated that the state will robustly contest the claim, arguing that the measures were lawful, proportionate, and applied in the public interest. Ireland is also in the process of withdrawing from the Energy Charter Treaty, although existing investments may remain protected for a period under sunset provisions.