Who audits New Zealand's listed companies? Market share, concentration, and switching trends.
Independent auditing is a cornerstone of corporate governance. This dashboard analyzes the NZX audit market across 11 firms and 116 active client relationships, revealing market concentration, sector specialization, and audit firm switching patterns.
Number of current NZX-listed clients per audit firm
All audit firms serving NZX-listed companies
| Firm | Category | Clients | Market Share | Sectors | Top Clients | |
|---|---|---|---|---|---|---|
| PricewaterhouseCoopers | Big Four | 33 | 28% | 8 |
Which audit firms dominate each sector?
Auditor appointments, resignations, and changes across NZX-listed companies
High Big Four concentration (currently 78%) can limit competition, increase fees, and reduce the diversity of professional judgement applied to listed company audits.
Understanding auditor relationships helps investors assess independence. Long-standing auditor-client relationships may affect objectivity over time.
NZX Listing Rules require audit partner rotation every 5 years. However, firm-level rotation is not mandated in New Zealand, unlike some overseas jurisdictions.
Audit fee disclosure varies across NZX issuers. Greater transparency helps investors evaluate whether audit quality is proportionate to the fees charged.
Data sourced from NZX company annual reports and public disclosures. Our datasets may not be complete and we are continuously updating and adding more data to the platform.
This analysis is provided for informational and educational purposes only. Nothing on this page constitutes financial, investment, legal, or tax advice. Always conduct your own research and consult with qualified professionals before making any investment decisions.
| Deloitte | Big Four | 20 | 17% | 8 |
| Ernst & Young | Big Four | 19 | 16% | 10 |
| KPMG | Big Four | 19 | 16% | 9 |
| Grant Thornton | Mid-tier | 7 | 6% | 6 |
| UHY Haines Norton | Mid-tier | 4 | 3% | 4 |
| Baker Tilly Staples Rodway | Mid-tier | 4 | 3% | 3 |
| William Buck | Mid-tier | 4 | 3% | 3 |
| BDO | Mid-tier | 3 | 3% | 3 |
| Hall Chadwick | Mid-tier | 2 | 2% | 2 |
| RSM | Mid-tier | 1 | 1% | 1 |
