NZX Auditor Market Intelligence
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.
Audit Market Share by Client Count
Number of current NZX-listed clients per audit firm
Auditor Directory
All audit firms serving NZX-listed companies
| Firm | Category | Clients | Market Share | Sectors | Top Clients | |
|---|---|---|---|---|---|---|
| PricewaterhouseCoopers | Big Four | 33 | 28% | 8 | ||
| Deloitte | Big Four | 20 | 17% | 9 | ||
| KPMG | Big Four | 19 | 16% | 9 | ||
| Ernst & Young | Big Four | 19 | 16% | 10 | ||
| Grant Thornton | Mid-tier | 7 | 6% | 6 | ||
| Baker Tilly Staples Rodway | Mid-tier | 4 | 3% | 3 | ||
| William Buck | Mid-tier | 4 | 3% | 3 | ||
| UHY Haines Norton | Mid-tier | 4 | 3% | 4 | ||
| BDO | Mid-tier | 3 | 3% | 3 | ||
| Hall Chadwick | Mid-tier | 2 | 2% | 2 | ||
| RSM | Mid-tier | 1 | 1% | 1 |
Sector Audit Concentration
Which audit firms dominate each sector?
Industrials
20 companiesFinancials
18 companiesReal Estate
14 companiesConsumer Staples
13 companiesConsumer Discretionary
12 companiesHealthcare
12 companiesMaterials
8 companiesInformation Technology
7 companiesUtilities
7 companiesCommunication Services
4 companiesAuditor Switching History (43)
Auditor appointments, resignations, and changes across NZX-listed companies
Why Auditor Market Analysis Matters
Market Concentration Risk
High Big Four concentration (currently 78%) can limit competition, increase fees, and reduce the diversity of professional judgement applied to listed company audits.
Auditor Independence
Understanding auditor relationships helps investors assess independence. Long-standing auditor-client relationships may affect objectivity over time.
Rotation Requirements
NZX Listing Rules require audit partner rotation every 5 years. However, firm-level rotation is not mandated in New Zealand, unlike some overseas jurisdictions.
Fee Transparency
Audit fee disclosure varies across NZX issuers. Greater transparency helps investors evaluate whether audit quality is proportionate to the fees charged.
Disclaimer
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.