# Form 13D/13G — Finradar API
> Version: 3.61.0 | Generated: 2026-06-20 | Content Hash: 6c77c9ef
> Fetch this file at: https://uat.finradarapi.com/llms/form-13d-13g.txt

## Authentication
All endpoints require an API key. Pass it via query parameter `?apiKey=YOUR_KEY` or header `X-API-Key: YOUR_KEY`. WebSocket endpoints accept the key in the `token` auth payload or query parameter.

---

## Form 13D/13G

Query parsed Schedule 13D and 13G beneficial ownership filings. 13D filings are required when a person or group acquires more than 5% of a company's shares with an activist intent; 13G filings are the passive-investor equivalent.

### POST /api/v1/form-13d

Search and filter parsed 13D/13G ownership filings. Supports filtering by ticker, issuer CIK, filer CIK, filer name, minimum ownership percentage, and form type.

**Token cost:** 0 (EXEMPT — auth / billing / account / admin / health)

**Utility:** Retrieve structured beneficial ownership data including percent of class, shares owned, voting power, and stated purpose of transaction.

**Use case:** Track activist investors building positions (>5% ownership), monitor large institutional ownership changes, identify takeover or proxy-fight filings, screen for high-conviction positions by ownership threshold.

**Parameters:**
- `query.ticker` (body, optional): Issuer trading symbol (e.g. 'TWTR'). Case-insensitive.
- `query.issuerCik` (body, optional): Issuer CIK number. Leading zeros are stripped automatically.
- `query.filerCik` (body, optional): Filer (reporting person) CIK. Leading zeros are stripped automatically.
- `query.filerName` (body, optional): Partial match on filer name (case-insensitive). E.g. 'Elon Musk'.
- `query.minOwnership` (body, optional): Minimum percent of class owned. E.g. 5.0 for >= 5%.
- `query.formType` (body, optional): Filter by form type: 'SC 13D', 'SC 13D/A', 'SC 13G', 'SC 13G/A'. Both SC and SCHEDULE variants accepted.
- `query.dateRange.from` (body, optional): Start date filter (ISO format, e.g. '2025-01-01').
- `query.dateRange.to` (body, optional): End date filter (ISO format, e.g. '2026-03-14').
- `from` (body, optional, default: 0): Pagination offset.
- `size` (body, optional, default: 50): Page size (max 50).
- `sort` (body, optional, default: [{"filedAt":{"order":"desc"}}]): Sort specification. Supported fields: filedAt, percentOfClass, sharesOwned.

**Sample response:**
```json
{
  "status": "success",
  "data": [
    {
      "accessionNo": "0001193125-22-104916",
      "formType": "SC 13D",
      "filedAt": "2022-04-14T00:00:00Z",
      "issuer": {
        "name": "Twitter Inc",
        "cik": "1418091",
        "ticker": "TWTR"
      },
      "filer": {
        "name": "Elon Musk",
        "cik": "1494730"
      },
      "ownership": {
        "percentOfClass": 9.2,
        "sharesOwned": 73486938,
        "soleVotingPower": 73486938,
        "sharedVotingPower": 0
      },
      "purpose": "Investment purposes and to engage in discussions with the Board...",
      "cusip": "90184L102",
      "dateOfEvent": "2022-03-14",
      "isAmendment": false
    }
  ],
  "meta": {
    "total": {
      "value": 1,
      "relation": "eq"
    },
    "from": 0,
    "size": 50
  }
}
```