Get substantial shareholders (5%+ voting rights) for an NZX company from NZX disclosure notices. ~267 records across ~85 issuers. Shows entity name, entity type (individual/company/trust/fund), voting rights percentage, shares held, whether they are also a director/executive, disclosure dates, an...
AI agents call get_substantial_holders to retrieve information from NZXplorer MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
ticker | string | Yes | NZX ticker symbol |
include_ceased | string | — | Set to "true" to include former substantial holders who dropped below 5% |
Parameters from the server's own tool schema.
This tool purely reads and retrieves public market disclosure data without creating, modifying, deleting, executing code, or initiating financial transactions. It returns structured information about substantial shareholders (5%+ voting rights) from legally mandated NZX disclosures. The described use cases (analysis, tracking, signal detection) are all read-only information gathering activities.
From the tool's definition Tool retrieves and queries substantial shareholder data from NZX disclosure notices: 'Get substantial shareholders', 'Shows entity name, entity type, voting rights percentage, shares held, disclosure dates'.
Attacks that exploit this kind of access
Get substantial shareholders (5%+ voting rights) for an NZX company from NZX disclosure notices. ~267 records across ~85 issuers. Shows entity name, entity type (individual/company/trust/fund), voting rights percentage, shares held, whether they are also a director/executive, disclosure dates, and threshold crossing history. Use for block holder analysis, activist investor tracking, M&A signal detection (accumulation patterns), and ownership concentration analysis. Complements get_shareholders (top-20 annual report data) with legally mandated real-time disclosures. It is categorised as a Read tool in the NZXplorer MCP Server MCP Server, which means it retrieves data without modifying state.
get_substantial_holders accepts 2 parameters: ticker, include_ceased. Required: ticker. The full parameter table on this page comes from the server's own tool schema.
Register the NZXplorer MCP Server MCP server in PolicyLayer and add a rule for get_substantial_holders: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches NZXplorer MCP Server. Nothing to install.
get_substantial_holders is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_substantial_holders rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for get_substantial_holders. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
get_substantial_holders is provided by the NZXplorer MCP Server MCP server (mambaventures/nzxplorer-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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