# Financial Datasets AI — Activist Ownership (SEC Schedule 13D)

> Financial Datasets AI — Activist Ownership (SEC Schedule 13D) is a paid API for AI agents from api.financialdatasets.ai, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-27).

Returns activist ownership stakes (SEC Schedule 13D filers above 5% with intent to influence control) for a subject company ticker or filer CIK, including holder details, shares held, percent of class, voting power, and filing date.

## Facts

- Endpoint: GET https://api.financialdatasets.ai/activist-ownership?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-27
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/financial-datasets-ai-activist-ownership-sec-schedule-13d-27c6eb35
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_argg7Vpq7s8V5q52SoGnJ

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 financial-datasets-ai-activist-ownership-sec-schedule-13d-27c6eb35
```

Example prompt: Which activist investors currently hold stakes in Apple — pull the latest Schedule 13D filings showing their percent of class and voting power.

## When to prefer this

Use this endpoint specifically when you need Schedule 13D activist ownership data — i.e., beneficial owners above 5% who have declared intent to influence corporate control. Prefer this over the general beneficial ownership endpoint (13D+13G) when you want to isolate only activist investors, not passive large holders. Choose this when building activist tracking dashboards, M&A intelligence tools, or corporate governance monitors.

## Known failure modes

- Missing both ticker and filer_cik — at least one must be provided
- Invalid ticker symbol returns empty results
- Invalid filer_cik format returns empty results or error
- Date filter typos (wrong format, not YYYY-MM-DD) return validation error
- Non-Professional use attempting to access plan-restricted data may be blocked
- Pagination cursor from a different query context may return unexpected results
- Payment failure (x402) if USDC balance is insufficient

## How this service works

Activist stakes from SEC Schedule 13D (holders above 5% with intent to influence control), by subject ticker or filer CIK: holder, shares held, percent of class, voting power and filing date, with optional amendment history. Use when an agent asks which activists hold a company, or where an activist is active. Non-Professional use; Professional use needs a plan at financialdatasets.ai.

## Output

A paginated list of activist ownership records from SEC Schedule 13D filings, each containing the holder name, filer CIK, subject company ticker, number of shares held, percent of class owned, voting power, and filing date. When history=true, each record also includes the full amendment history showing how the stake has evolved over time. A next_page_url cursor is provided for pagination.

## 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",
     "required": [],
     "properties": {
      "limit": {
       "type": "integer",
       "default": 10,
       "description": "The total number of rows to return (default: 10; no maximum)."
      },
      "cursor": {
       "type": "string",
       "description": "Opaque pagination cursor from a previous response's next_page_url."
      },
      "ticker": {
       "type": "string",
       "description": "The ticker symbol of the subject company."
      },
      "history": {
       "type": "boolean",
       "default": false,
       "description": "When true, returns the full amendment history of each stake instead of only its current state."
      },
      "filer_cik": {
       "type": "string",
       "description": "The SEC CIK of the filer (the beneficial owner)."
      },
      "filing_date": {
       "type": "string",
       "description": "Filter by exact filing date in YYYY-MM-DD format."
      },
      "filing_date_gt": {
       "type": "string",
       "description": "Filter by filing date greater than this date (YYYY-MM-DD)."
      },
      "filing_date_lt": {
       "type": "string",
       "description": "Filter by filing date less than this date (YYYY-MM-DD)."
      },
      "filing_date_gte": {
       "type": "string",
       "description": "Filter by filing date greater than or equal to this date (YYYY-MM-DD)."
      },
      "filing_date_lte": {
       "type": "string",
       "description": "Filter by filing date less than or equal to this date (YYYY-MM-DD)."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/financial-datasets-ai-activist-ownership-sec-schedule-13d-27c6eb35/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.financialdatasets.ai](https://www.zero.xyz/host/api.financialdatasets.ai/llms.txt)