# x402stock SEC 13F-HR Institutional Fund Holdings

> x402stock SEC 13F-HR Institutional Fund Holdings is a paid API for AI agents from agents.x402stock.xyz, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-19).

Returns the latest 13F-HR institutional holdings report for a fund or investment manager by SEC CIK, listing every reported position with issuer, CUSIP, market value, share count, option type, and voting authority.

## Facts

- Endpoint: GET https://agents.x402stock.xyz/api/v1/fund-holdings/:cik?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402stock-sec-13f-hr-institutional-fund-holdings-24a7d8f1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EGGAYH8IiUzbFjdtiNsaT

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability x402stock-sec-13f-hr-institutional-fund-holdings-24a7d8f1
```

Example prompt: Pull the latest 13F-HR institutional holdings for Berkshire Hathaway — their SEC CIK is 0001067983 — and show me the top 20 positions with market value and share count.

## When to prefer this

Use this endpoint when you need structured, position-level detail from a fund's official SEC 13F-HR filing, including CUSIP identifiers, option types, and voting authority breakdowns. It is the right choice when you have a SEC CIK and want the most recent complete institutional holdings snapshot sourced directly from EDGAR. Prefer this over scraping SEC's website or using higher-latency data providers when you need machine-readable, per-position data with market values sorted by size.

## Known failure modes

- Invalid or unknown CIK returns a not-found or empty result
- CIK exists but the fund has not filed a 13F-HR (e.g. it is not a qualifying institutional manager) — returns empty or error
- Stale data if SEC EDGAR has not yet processed the most recent quarterly filing
- limit parameter out of range (≤0 or >1000) returns a validation error
- Payment failure (insufficient USDC balance or x402 protocol error) prevents the call from completing

## How this service works

The latest 13F-HR institutional holdings for a fund or investment manager, looked up by its SEC CIK. Returns every reported position with issuer, CUSIP, market value, share count, option type, and voting authority, plus the portfolio's total value, sorted largest first. ?limit= positions. Sourced from SEC EDGAR. From x402stock, a market & economic data API (x402, USDC).

## Output

A ranked list of every position reported in the fund's most recent 13F-HR filing, each entry including issuer name, CUSIP, market value in USD, share count, option type (if applicable), and voting authority category. The response also includes the portfolio's total reported market value, sorted largest position first. The number of positions returned can be limited via the `limit` query parameter (default 100, max 1000).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "pathParams": {
     "cik": {
      "type": "string"
     },
     "type": "object"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "limit": {
       "type": "integer",
       "default": 100,
       "maximum": 1000,
       "exclusiveMinimum": 0
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402stock-sec-13f-hr-institutional-fund-holdings-24a7d8f1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agents.x402stock.xyz](https://www.zero.xyz/host/agents.x402stock.xyz/llms.txt)