`nport_fund_owners`

Pack: sec-nport · Connect: https://pipeworx.io/mcp (see Connect below for a single-pack URL)

No MCP client? Call it directly: GET https://gateway.pipeworx.io/v1/tools/nport_fund_owners for the schema, then POST the same URL with its arguments for the data.

Which mutual funds and ETFs hold a given stock or bond, ranked by position size, from SEC Form N-PORT portfolio filings — the reverse of a fund fact sheet, which makes you name the fund first. Give a ticker (“NVDA”), a company name (“NVIDIA”), or a CUSIP. Returns each fund, its sponsor, the position value, share or principal count, and what percent of that fund’s net assets it is. Answers “which ETFs hold the largest positions in NVDA”, “what funds own this corporate bond”, “who are the biggest fund holders of this stock”.

Parameters

Name	Type	Required	Description
`security`	string	yes	Ticker, company name, or CUSIP. A ticker resolves through OpenFIGI to the underlying company.
`quarter`	string	no	Release to search, e.g. “2026q2”. Omit to search everything loaded.
`limit`	number	no	How many holders to return, 1-200 (default 25).

Example call

Arguments

{
  "security": "NVDA",
  "limit": 10
}

curl

curl -X POST https://gateway.pipeworx.io/sec-nport/mcp \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"nport_fund_owners","arguments":{"security":"NVDA","limit":10}}}'

TypeScript (@pipeworx/sdk)

import { Pipeworx } from '@pipeworx/sdk';
const pipeworx = new Pipeworx();

const result = await pipeworx.call('nport_fund_owners', {
  "security": "NVDA",
  "limit": 10
});

More examples

{
  "security": "NVIDIA Corp"
}

Connect

Add this to your MCP client config — every tool in the catalog, including this one — or use one-click install buttons:

{
  "mcpServers": {
    "pipeworx": {
      "url": "https://pipeworx.io/mcp"
    }
  }
}

Connect to just the sec-nport pack

{
  "mcpServers": {
    "sec-nport": {
      "url": "https://gateway.pipeworx.io/sec-nport/mcp"
    }
  }
}

See Getting Started for client-specific install steps.

nport_fund_owners