# Whale Holdings - SEC 13F Filings Lookup

> Whale Holdings - SEC 13F Filings Lookup is a paid API for AI agents from whale.memoryapi.org, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-21).

Fetches the latest 13F filings from SEC EDGAR to reveal what billionaires and major hedge funds are currently holding in their portfolios.

## Facts

- Endpoint: GET https://whale.memoryapi.org/x402/whale/holdings?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/whale-holdings-sec-13f-filings-lookup-4d504b29
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zof1HJJWgEBNGidwDFa5R

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 whale-holdings-sec-13f-filings-lookup-4d504b29
```

Example prompt: Pull the latest 13F filings from SEC EDGAR and show me what the biggest hedge funds and billionaires are currently holding in their portfolios.

## When to prefer this

Choose this endpoint when you need structured, ready-to-use 13F institutional holdings data without scraping SEC EDGAR directly. It's ideal for financial research agents, investment analysis workflows, or trend-monitoring pipelines that need to know what large institutional investors are holding. Prefer this over the combined whale digest endpoint when you specifically want 13F filing data without insider transaction noise.

## Known failure modes

- SEC EDGAR API downtime causing stale or unavailable filing data
- 13F filings are quarterly and may lag current positions by up to 45 days
- Payment failure if USDC balance is insufficient (x402 protocol)
- Rate limiting or temporary unavailability of the memoryapi endpoint
- Incomplete filing data if a fund filed late or amended their 13F

## How this service works

Latest 13F filings (what billionaires/hedge funds are holding) via SEC EDGAR.

## Output

Returns structured data from the most recent SEC 13F filings, including the stock holdings, position sizes, and portfolio compositions of major institutional investors and hedge funds (billionaire-level portfolios). Data is sourced from SEC EDGAR and reflects what large money managers have disclosed publicly.

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "required": [
    "method"
   ],
   "properties": {
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/whale-holdings-sec-13f-filings-lookup-4d504b29/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from whale.memoryapi.org](https://www.zero.xyz/host/whale.memoryapi.org/llms.txt)