# Berkshire Hathaway 13F position changes

**Use case:** 

What Berkshire Hathaway bought, sold, added to and exited between 13F filings, with share counts, values and tickers resolved. Swap the CIK for any fund you follow.

## Input

```json
{
  "ciks": [
    "0001067983"
  ],
  "changeTypes": [
    "new-position",
    "exited",
    "increased",
    "decreased"
  ],
  "minPositionValue": 0,
  "maxItems": 500,
  "resolveTickers": true,
  "emitInitialSnapshot": false,
  "userAgent": "apify-actor-sec-13f-diff daniel@apexwebstudio.co.nz"
}
```

## Output

```json
{
  "fundName": {
    "label": "Fund name",
    "format": "string"
  },
  "reportPeriod": {
    "label": "Report period",
    "format": "string"
  },
  "changeType": {
    "label": "Change type",
    "format": "string"
  },
  "issuerName": {
    "label": "Issuer name",
    "format": "string"
  },
  "ticker": {
    "label": "Ticker",
    "format": "string"
  },
  "sharesChange": {
    "label": "Shares change",
    "format": "integer"
  },
  "valueChange": {
    "label": "Value change",
    "format": "integer"
  },
  "filedAt": {
    "label": "Filed at",
    "format": "string"
  },
  "filingUrl": {
    "label": "Filing URL",
    "format": "string"
  }
}
```

## About this Actor

This example demonstrates how to use [SEC 13F Holdings Diff — Quarterly Fund Position Changes Monitor](https://apify.com/datadeltas/sec-13f-diff.md) with a specific input configuration. Visit the [Actor detail page](https://apify.com/datadeltas/sec-13f-diff.md) to learn more, explore other use cases, and run it yourself.


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For full API examples (JavaScript, Python, CLI, MCP, OpenAPI), see this Task's Actor page: https://apify.com/datadeltas/sec-13f-diff.md

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