SEC 13F Holdings Delta Tracker

Track quarter-over-quarter 13F holdings changes from SEC EDGAR, parsed into clean JSON. Built for analysts, funds, fintech builders and AI agents. Factual public SEC/EDGAR data — not financial or investment advice. Not affiliated with the U.S. SEC.

📊 What you get

Clean JSON, one record per position change. Key fields (full output has 22 fields):

• filer_name / filer_cik — the institutional manager that filed
• company_name — issuer name as reported on the 13F information table
• cusip — Security CUSIP (authoritative identifier)
• title_of_class — Security class
• delta_type — NEW / INCREASED / DECREASED / EXITED
• shares_current, shares_prior, shares_change, pct_change
• value_usd_current, value_usd_prior, value_usd_change
• pct_of_portfolio_current, is_top10_new
• period_of_report / prior_period_of_report — the two quarters compared
• filing_url — direct sec.gov link to the information table

symbol is a best-effort ticker for a short list of high-volume CUSIPs and is null for everything else — the SEC does not publish a free CUSIP→ticker map.

Pricing: $0.05 per record (Pay-Per-Event) — about 20 records per $1. An Actor Start fee of $0.01 applies per run (charged per GB of memory, minimum 1).

▶️ Input

You must name at least one fund, via fund_names (substring match against the tracked manager list) or fund_ciks (exact SEC CIK). With neither, the run returns 0 rows with an explanatory message and charges nothing.

{
  "fund_names": ["Berkshire Hathaway"],
  "delta_types": ["NEW", "INCREASED"],
  "limit": 5
}

🤖 Use with AI agents

Structured, source-linked SEC data built for LLM and agent pipelines — point Claude, the OpenAI Agents SDK, an n8n flow or any MCP-aware client at it and pull quarter-over-quarter 13F holdings changes on demand. Coverage depends on EDGAR availability and filing cadence.

Sample agent prompt:

Show which positions a fund added, trimmed or exited versus last quarter.

Agentic payments (x402): Supports agentic payment via x402 — agents can call this actor with USDC, no API key required.

⏰ Run on a schedule

The recurring frame is the point — 13F holdings are filed quarterly (45 days after quarter end), so a weekly pull catches each new filing as it lands:

{
  "fund_names": ["Berkshire Hathaway", "Tiger Global"],
  "limit": 50
}

🔗 Related SEC actors

More holdings trackers: 13F Tracker Pro, N-PORT Holdings, N-PORT-P Holdings, N-PX Proxy Votes

Agent front doors: SEC Corporate Events MCP, Regulatory Filings MCP

---

Data parsed from public SEC EDGAR filings. Factual public SEC/EDGAR data — not financial or investment advice. Not affiliated with the U.S. SEC.