SEC 13F Holdings — Fund Manager Portfolios as Clean JSON

What does Berkshire own? What did Bridgewater buy last quarter? Every US institutional manager above $100M must disclose its holdings quarterly in SEC Form 13F. This Actor reads those filings and returns one structured report per manager: top holdings with portfolio weights, plus what changed since the previous quarter.

Portfolio-tracking sites charge $50+/month for this and still make you click through pages. This is the same primary source, as an API call.

What you get per manager

{
  "manager": "BERKSHIRE HATHAWAY INC",
  "cik": 1067983,
  "periodOfReport": "2026-03-31",
  "filedAt": "2026-05-15",
  "totalValueUsd": 263100000000,
  "positionsCount": 29,
  "topHoldings": [
    { "issuer": "APPLE INC", "cusip": "037833100", "valueUsd": 57850000000, "shares": 280000000, "putCall": null, "pctOfPortfolio": 21.99 }
  ],
  "quarterOverQuarter": {
    "previousPeriod": "2025-12-31",
    "previousTotalValueUsd": 271400000000,
    "newPositions": [{ "issuer": "ALLY FINL INC", "cusip": "02005N100", "valueUsd": 498992850, "shares": 12719675 }],
    "exitedPositions": [],
    "increased": [],
    "decreased": []
  },
  "url": "https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001067983&type=13F-HR"
}

Pass fund names or CIK numbers, up to 25 per run. Names are resolved against EDGAR's own company search.

Why filings beat portfolio-tracking sites

• Primary source: the numbers come from the manager's own filing, not a third-party rescrape of it.
• Quarter-over-quarter computed for you: new positions, exits, increases and decreases, sorted by size.
• Combined filings handled correctly: large managers file through multiple sub-managers and repeat the same security several times. Positions here are aggregated by CUSIP, so Apple shows up once with the real total.
• Options flagged: putCall distinguishes puts and calls from common stock positions.

Use cases

• Idea generation: what did the managers you respect start buying last quarter?
• Conviction tracking: position weight changes across quarters for a watchlist of funds.
• Client reporting: automated "smart money" summaries for newsletters or dashboards.
• AI agents: "compare the top 10 holdings of Berkshire and Markel" is two tool calls and a prompt.

Input

Field	Description
managers	Fund names or CIKs, up to 25: ["Berkshire Hathaway", "1350694"]
topN	Holdings per report, by value (default 50)
quarterOverQuarter	Diff vs the previous 13F (default true)
minPositionValueUsd	Drop positions below this value from the list

Use with AI agents (MCP)

This Actor is exposed as a tool on the Apify MCP Server:

{
  "mcpServers": {
    "sec-13f-holdings-feed": {
      "url": "https://mcp.apify.com?tools=jdepablos/sec-13f-holdings-feed",
      "headers": { "Authorization": "Bearer <APIFY_TOKEN>" }
    }
  }
}

Completes the SEC suite with Insider Trading Feed (Form 4) and Startup Funding Feed (Form D): insiders, private rounds and institutional portfolios, all from the primary source.

Pricing

Pay per event: one flat fee per manager report. A report includes the full top-holdings list and the quarter-over-quarter analysis. Failed lookups are never charged.

FAQ

How fresh is the data? 13F filings are due 45 days after quarter end, so holdings lag the market by up to a quarter and a half. That is a property of the disclosure regime, not of this feed. filedAt and periodOfReport are always included so you know exactly what you are looking at.

Why don't the exits match what the news said? News often reports 13F/A amendments or combines family entities. This feed reads original 13F-HR filings per CIK. If a manager files an amendment with confidential positions revealed later, those appear when the amendment is the source of record.

Are short positions included? No. 13F discloses long positions and options (see putCall); shorts are not reportable.

What is value measured in? US dollars, as reported in current filings.

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