# SEC 13F Whale Watcher (`zaden/sec-13f-whale-watcher`) Actor

See what institutional managers are holding, straight from their latest SEC 13F-HR filing on EDGAR. Get value, share count, and voting authority for every position - no paywall, no delay.

- **URL**: https://apify.com/zaden/sec-13f-whale-watcher.md
- **Developed by:** [Zaden](https://apify.com/zaden) (community)
- **Categories:** Automation, Developer tools, Other
- **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

$30.00 / 1,000 manager scanneds

This Actor is paid per event. You are not charged for the Apify platform usage, but only a fixed price for specific events.

Learn more: https://docs.apify.com/actors/running/actors-in-store.md#pay-per-event

## What's an Apify Actor?

Actors are web data automations that power AI and operations. They run on the Apify platform to scrape websites, process data, connect APIs, and automate workflows.
In Batch mode, an Actor accepts a well-defined JSON input, performs an action which can take anything from a few seconds to a few hours,
and optionally produces a well-defined JSON output, datasets with results, or files in key-value store.
In Standby mode, an Actor provides a web server which can be used as a website, API, or an MCP server.
Actors are written with capital "A".

## How to integrate an Actor?

If asked about integration, you help developers integrate Actors into their projects.
You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready.
The best way to integrate Actors is as follows.

- **AI agents and MCP clients** — the [Apify MCP server](https://docs.apify.com/integrations/mcp.md) at `https://mcp.apify.com` (remote, streamable HTTP, OAuth on first use).
- **Agentic workflows and local Actor development** — [Agent Skills](https://apify.com/.well-known/agent-skills/index.json) with the [Apify CLI](https://docs.apify.com/cli/docs.md): `npm install -g apify-cli`, then `apify login`.
- **JavaScript/TypeScript projects** — the official [JS/TS client](https://docs.apify.com/api/client/js/docs.md): `npm install apify-client`.
- **Python projects** — the official [Python client](https://docs.apify.com/api/client/python/docs.md): `pip install apify-client`.
- **Any other language** — the [REST API](https://docs.apify.com/api/v2.md).

For usage examples, see the [API](#api) section below.

For more details, see Apify documentation as [Markdown index](https://docs.apify.com/llms.txt) and [Markdown full-text](https://docs.apify.com/llms-full.txt).

# README

## SEC 13F Whale Watcher

See exactly what any institutional investment manager is holding, straight from their latest SEC 13F-HR filing on EDGAR.

### What you get

For every manager CIK you check, this Actor pulls their most recent 13F-HR filing and returns one row per equity position:

- Issuer name, CUSIP, and share class
- Position value (converted to real USD, not the thousands SEC reports)
- Share count and whether it's shares or principal amount
- Put/call flag, investment discretion, and voting authority breakdown (sole/shared/none)
- The report's period date so you know exactly which quarter you're looking at

### Why this instead of a 13F tracker site

Most "whale watcher" sites republish 13F data behind a paywall, a delay, or a subscription. This Actor reads straight from `data.sec.gov` and `sec.gov/Archives`, so you get the same filing SEC itself publishes, exportable as JSON/CSV/Excel, and pipeable into your own research or alerts.

### Who this is for

Retail investors and researchers who want to track what hedge funds, family offices, and asset managers are buying - without paying for a dedicated 13F terminal. Useful as a quarterly scheduled check (13F filings are due 45 days after each quarter-end).

### How to use it

1. Add the CIK numbers of the managers you want to track (not stock tickers - 13F filers are institutions, identified by their own SEC CIK). A few well-known ones to get started:
   - `0001067983` - Berkshire Hathaway
   - `0001350694` - Bridgewater Associates
   - `0001167483` - Renaissance Technologies
   - `0001009207` - Soros Fund Management
   - Find any manager's CIK by searching their name at [SEC EDGAR company search](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany).
2. Set how many top holdings to return per manager (default 25, ranked by position value).
3. Run it. Each CIK is checked against its latest 13F-HR filing and every qualifying holding is parsed.
4. Schedule it quarterly on Apify to build a running holdings-change log.

### Example output

```json
{
  "cik": "0001067983",
  "managerName": "BERKSHIRE HATHAWAY INC",
  "periodOfReport": "2026-06-30",
  "issuerName": "APPLE INC",
  "cusip": "037833100",
  "classOfShares": "COM",
  "valueUsd": 78500000000,
  "shares": 300000000,
  "investmentDiscretion": "SOLE",
  "votingAuthoritySole": 300000000
}
```

### Pricing

Pay-per-event: **$0.03 per manager scanned**, charged once per CIK regardless of how many holdings are found. Checking 10 managers costs $0.30.

### FAQ

**Does this need SEC login or an API key?** No. SEC EDGAR's data endpoints are public.

**What if a CIK isn't a 13F filer?** You get a row explaining that, so you can tell "not a 13F filer" apart from "not checked."

**How current is the data?** 13F-HR filings are due within 45 days of each quarter's end, so holdings are always at least one quarter old - that's an SEC disclosure rule, not a limitation of this Actor.

# Actor input Schema

## `ciks` (type: `array`):

SEC CIK numbers of the investment managers to check (not stock tickers - 13F filers are institutions). Examples: 0001067983 (Berkshire Hathaway), 0001350694 (Bridgewater Associates), 0001167483 (Renaissance Technologies). Find a CIK by searching the manager's name at https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany

## `topHoldingsPerFiler` (type: `integer`):

Maximum number of holdings to return per manager, ranked by position value (largest first).

## `minValueUsd` (type: `integer`):

Skip holdings worth less than this amount. Set to 0 to include everything.

## Actor input object example

```json
{
  "ciks": [
    "0001067983",
    "0001350694"
  ],
  "topHoldingsPerFiler": 25,
  "minValueUsd": 0
}
```

# Actor output Schema

## `results` (type: `string`):

No description

# API

You can run this Actor programmatically using our API. Below are code examples in JavaScript, Python, and CLI, as well as the OpenAPI specification and MCP server setup.

## JavaScript example

```javascript
import { ApifyClient } from 'apify-client';

// Initialize the ApifyClient with your Apify API token
// Replace the '<YOUR_API_TOKEN>' with your token
const client = new ApifyClient({
    token: '<YOUR_API_TOKEN>',
});

// Prepare Actor input
const input = {
    "ciks": [
        "0001067983",
        "0001350694"
    ]
};

// Run the Actor and wait for it to finish
const run = await client.actor("zaden/sec-13f-whale-watcher").call(input);

// Fetch and print Actor results from the run's dataset (if any)
console.log('Results from dataset');
console.log(`💾 Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`);
const { items } = await client.dataset(run.defaultDatasetId).listItems();
items.forEach((item) => {
    console.dir(item);
});

// 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/js/docs

```

## Python example

```python
from apify_client import ApifyClient

# Initialize the ApifyClient with your Apify API token
# Replace '<YOUR_API_TOKEN>' with your token.
client = ApifyClient("<YOUR_API_TOKEN>")

# Prepare the Actor input
run_input = { "ciks": [
        "0001067983",
        "0001350694",
    ] }

# Run the Actor and wait for it to finish
run = client.actor("zaden/sec-13f-whale-watcher").call(run_input=run_input)

# Fetch and print Actor results from the run's dataset (if there are any)
print(f"💾 Check your data here: https://console.apify.com/storage/datasets/{run.default_dataset_id}")
for item in client.dataset(run.default_dataset_id).iterate_items():
    print(item)

# 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/python/docs/quick-start

```

## CLI example

```bash
echo '{
  "ciks": [
    "0001067983",
    "0001350694"
  ]
}' |
apify call zaden/sec-13f-whale-watcher --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "type": "http",
            "url": "https://mcp.apify.com/?tools=fetch-actor-details,zaden/sec-13f-whale-watcher"
        }
    }
}

```

The hosted server signs you in with OAuth on first connect, so no API token belongs in this config. Clients without OAuth support can send an `Authorization: Bearer <APIFY_API_TOKEN>` header instead, using a token from API & Integrations in Apify Console (https://console.apify.com/settings/integrations).

## OpenAPI specification

Download the OpenAPI definition: https://api.apify.com/v2/actors/JhN3EgSIaOxX7XxTg/builds/2WD6feswQNP8W8Etm/openapi.json