CUSIP Cross-Reference

About this dataset

CUSIP Cross-Reference is a Free dataset in the SEC Data group of the BankRegReports Data API. The response carries 7 documented fields, sourced from SEC Form 13F (aggregated by CUSIP).

CUSIP cross-reference for a security - pass ?cusip=<9-char CUSIP>.

The SEC_CUSIP_INDEX table is keyed by CUSIP (no per-bank rssd_id), so this is a bounded list endpoint: one row per reported issuer-name variant of the CUSIP, each with how many filers/RSSDs hold it and aggregate 13F value/shares.

Endpoint

GET /api/v1/sec/cusip/

Parameters

Name	Required	Description
cusip	required	9-character CUSIP of the security. e.g. 037833100

Response fields

Field	Type	Description
cusip	string
name_of_issuer	string, nullable
n_filer_rssds_holding	integer, nullable
n_filers_holding	integer, nullable
total_value_usd_thousand	number (double), nullable
total_shares	number (double), nullable
most_common_class	string, nullable

Example request

curl "https://api.bankregreports.com/api/v1/sec/cusip/" \
  -H "Authorization: Bearer $BANKREG_API_TOKEN"

Responses are JSON in a {"data": ..., "meta": {...}} envelope. Get a token on the setup page.

Example response shape

A successful call returns HTTP 200 with a JSON body. Each row in data carries the fields below, shown with their documented types rather than sample values.

{
  "data": [
    {
      "cusip": "string",
      "name_of_issuer": "string",
      "n_filer_rssds_holding": "integer",
      "n_filers_holding": "integer",
      "total_value_usd_thousand": "number (double)",
      "total_shares": "number (double)",
      "most_common_class": "string"
    }
  ],
  "meta": { ... }
}

When to use it

CUSIP Cross-Reference sits in the SEC Data group of the Data API. Reach for it when your work needs this data straight from the API: it comes back as JSON you can load into a notebook, a spreadsheet or a scheduled pipeline, with the dataset key sec_cusip naming it the same way in the REST path, the Python SDK and the OpenAPI document.

Access and authentication

This dataset is in the Free tier. Send your API token in the Authorization header as a Bearer token, using a GET request to the endpoint above. The Free plan is the first plan that includes it. Check the plan comparison for request limits, and the data update schedule for when new filings reach the API.

Related datasets

• SEC Filing Index: SEC EDGAR filing index for one bank's registrant.
• XBRL Financial Facts: Most recently filed XBRL concept facts from the bank's 10-K/Q.
• Insider Transactions: Insider Form-4 transactions for one bank's registrant.
• 8-K Material Events: 8-K filings broken out by item number, the SEC material-event feed.

Keep going

Browse every dataset, follow the setup walkthrough to make a first call, use the Excel add-in for formulas, or connect an assistant through the MCP server.

Python SDK

The Python SDK does not have a method for this dataset yet. Call the REST endpoint above with any HTTP client.