# StableFinance SEC 13F Institutional Holdings

> StableFinance SEC 13F Institutional Holdings is a paid API for AI agents from stablefinance.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Retrieves SEC 13F institutional holdings data, filterable by stock ticker or filer CIK, with date range support

## Facts

- Endpoint: GET https://stablefinance.dev/api/institutional-holdings
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/stablefinance-dev-6be07d3b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XMOU_BUuLL-E5HVIeOT6V

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 stablefinance-dev-6be07d3b
```

Example prompt: Show me all institutional holders of NVDA from 13F filings for the report period ending 2024-06-30, up to 50 results.

## When to prefer this

Use this endpoint when you need SEC-sourced 13F institutional ownership data for a specific stock or institutional filer, especially when you want to filter by reporting period. Prefer this over general news or market data sources when you need regulatory-grade, timestamped institutional position data rather than estimated or real-time ownership.

## Known failure modes

- Unknown ticker returns empty holdings array
- Invalid filer_cik returns empty results
- Malformed report_period date (not YYYY-MM-DD) returns validation error
- No matching holdings for date range returns empty array
- Exceeding limit maximum of 200 returns schema validation error
- Missing both ticker and filer_cik may return unfiltered or large result set

## How this service works

SEC 13F positions. Pivot by held security (ticker) or by filer (filer_cik).

## Output

Returns an array of institutional holdings records including the ticker, filer CIK, and detailed position data drawn from SEC 13F filings. Results can be scoped to a specific security or a specific filer institution, optionally filtered to a date range.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "limit": 50,
   "ticker": "AAPL",
   "report_period_gte": "2024-01-01",
   "report_period_lte": "2024-06-30"
  }
 }
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "$schema": "https://json-schema.org/draft/2020-12/schema",
     "properties": {
      "limit": {
       "type": "integer",
       "maximum": 200,
       "minimum": 1
      },
      "ticker": {
       "type": "string",
       "minLength": 1
      },
      "filer_cik": {
       "type": "string",
       "minLength": 1
      },
      "report_period": {
       "type": "string",
       "pattern": "^\\d{4}-\\d{2}-\\d{2}$"
      },
      "report_period_gt": {
       "type": "string",
       "pattern": "^\\d{4}-\\d{2}-\\d{2}$"
      },
      "report_period_lt": {
       "type": "string",
       "pattern": "^\\d{4}-\\d{2}-\\d{2}$"
      },
      "report_period_gte": {
       "type": "string",
       "pattern": "^\\d{4}-\\d{2}-\\d{2}$"
      },
      "report_period_lte": {
       "type": "string",
       "pattern": "^\\d{4}-\\d{2}-\\d{2}$"
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "$schema": "https://json-schema.org/draft/2020-12/schema",
     "required": [
      "institutional_holdings"
     ],
     "properties": {
      "ticker": {
       "type": "string"
      },
      "filer_cik": {
       "type": "string"
      },
      "institutional_holdings": {
       "type": "array",
       "items": {}
      }
     },
     "additionalProperties": false
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ticker": "AAPL",
  "institutional_holdings": [
   {
    "cusip": "037833100",
    "shares": 905560000,
    "ticker": "AAPL",
    "form_type": "13F-HR",
    "value_usd": 174580000000,
    "filer_name": "BERKSHIRE HATHAWAY INC",
    "filing_date": "2026-02-14",
    "report_period": "2025-12-31",
    "name_of_issuer": "APPLE INC",
    "accession_number": "0000950123-26-001234"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/stablefinance-dev-6be07d3b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from stablefinance.dev](https://www.zero.xyz/host/stablefinance.dev/llms.txt)