ASX Proposes 25% Cap on Share Issuance Without Shareholder Vote

The Australian Securities Exchange (ASX) announced on 17 June 2026 a consultation to introduce a hard cap limiting a company’s ability to issue new shares for a public merger or acquisition without first obtaining shareholder approval. The proposed rule would set the threshold at 25% of issued capital, a move directly targeting the use of scrip consideration in corporate takeovers. This initiative seeks to standardize governance practices and enhance investor protections across the Australian equity market, where issuance limits have historically varied. The consultation period will run for eight weeks, concluding in mid-August 2026.

Context — why this matters now

This proposal responds to a growing trend of target companies using large share issuances as a defensive or facilitative mechanism in merger negotiations. The practice allows acquirers to use their own stock as currency for deals, sometimes bypassing a direct vote from the target company’s shareholders if the issuance falls below certain discretionary thresholds. Historically, the ASX has granted case-by-case exemptions from its 15% annual placement capacity limit for acquisitions, leading to inconsistent outcomes.

The current review follows a series of high-profile transactions that tested governance norms. In 2025, a bid for Santos involved a share issuance representing 22% of the acquirer’s capital without a specific shareholder meeting. Australian institutional investors, including major superannuation funds, have increasingly lobbied for clearer rules to prevent dilution of their holdings. The ASX is acting to align its listing standards with global peers like the UK’s LSE, which maintains a stricter 20% threshold for dis-application of pre-emption rights.

Data — what the numbers show

The proposed 25% cap creates a bright-line rule for when shareholder approval is mandatory in a takeover scenario. This figure sits between the existing 15% annual placement limit for general purposes and the 100% of issued capital that can be issued with full shareholder support. In 2024, approximately 18% of all ASX-listed M&A deals involved a scrip component exceeding 20% of the acquirer's share capital.

A comparison of global exchange thresholds reveals the ASX's proposed positioning. The London Stock Exchange sets its mandatory vote threshold at a more restrictive 20%, while the Singapore Exchange operates a tiered system up to 50%. The Hong Kong Exchange generally requires a vote for any issuance over 20%. The ASX's 25% proposal aims to balance investor protection with commercial flexibility for Australian corporations.

Exchange	Threshold for Mandatory Shareholder Vote on Issuance for Acquisitions
ASX (Proposed)	25%
London Stock Exchange	20%
Singapore Exchange	Up to 50% (tiered)
Hong Kong Exchange	20%

Over the past decade, the average scrip component for ASX M&A deals valued over $500 million amounted to 32% of the acquirer's equity. The new rule would have directly impacted nearly 40% of these transactions, forcing a shareholder vote that was previously waived.

Analysis — what it means for markets / sectors / tickers

The immediate effect of this proposal is a likely increase in shareholder activism and influence over major transformative deals. Sectors prone to consolidation through stock-based acquisitions, such as Materials and Healthcare, will see a shift in deal dynamics. Companies like BHP Group (BHP) and CSL Limited (CSL), which have used scrip for large acquisitions historically, may face more structured engagement with investors for future transactions.

Mid-cap companies seeking to use their equity as a strategic acquisition currency could be disadvantaged. They may need to include cash components or structure deals as schemes of arrangement, which always require a vote, potentially slowing down M&A activity in the short term. A counter-argument is that the 25% threshold remains high enough to allow for significant deals to proceed efficiently, avoiding unnecessary hurdles for smaller, bolt-on acquisitions that are commonplace in sectors like Technology.

Fund managers with concentrated positions in potential acquirers are the primary beneficiaries, as the rule mitigates uncontrolled dilution risk. Hedge funds employing merger arbitrage strategies may see reduced volatility around deal announcements, as the requirement for a vote adds a layer of predictability. Flow is expected to shift towards companies with strong corporate governance scores, as institutional investors reward transparent capital allocation.

Outlook — what to watch next

The key date for the market is the conclusion of the consultation period in mid-August 2026. The ASX will then review submissions, with a final rule expected by the fourth quarter of 2026. Market participants should monitor statements from the Australian Council of Superannuation Investors (ACSI), a influential governance body that will likely endorse the proposal.

A critical level to watch is the 20% threshold; if institutional pushback is strong during the consultation, the ASX may tighten the cap to align with London. The first major M&A announcement following the rule's implementation will serve as a test case for its application and market acceptance. Any legal challenges to the ASX's authority to set such a cap would introduce significant uncertainty, though this is considered a low-probability event.

Frequently Asked Questions

What is a scrip consideration in a takeover?

Scrip consideration refers to when an acquiring company uses its own newly issued shares as payment to the shareholders of the target company. Instead of paying cash, the target's shareholders receive stock in the enlarged entity. This method allows acquirers to preserve cash but dilutes the ownership percentage of their existing shareholders. The ASX's proposed rule mandates a vote when this dilution exceeds a quarter of the company's pre-deal equity.

How does the ASX's 25% cap compare to its current rules?

Currently, the ASX Listing Rules limit the number of equity securities a company can issue without shareholder approval to 15% of its issued capital per year. However, the ASX has discretion to grant exemptions for securities issued as consideration for an acquisition. This has led to a perceived lack of consistency. The 25% cap would remove this discretion for public M&A, creating a predictable, non-waivable threshold that applies specifically to takeover-related issuance.

Will this change affect small cap companies more than large caps?