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13F Institutional Holdings API

Every institutional investment manager with over $100M in qualifying assets must file SEC Form 13F within 45 days of each quarter end. Datastream parses these filings and exposes structured holdings data through a simple REST API.

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What you get

  • Current holdings: Full position list for any 13F filer by CIK
  • Quarter-over-quarter comparison: See new positions, closed positions, and share changes
  • Historical data: Access 13F filings going back to 1999
  • Normalized identifiers: Holdings mapped to tickers, CUSIPs, and CIKs

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Quick start

Get Berkshire Hathaway’s current 13F holdings: 
curl -H "x-api-key: $OMNI_DATASTREAM_API_KEY" \
  "https://api.secapi.ai/v1/owners/13f?cik=0001067983&limit=10"

{
  "data": [
    {
      "issuer_name": "APPLE INC",
      "cusip": "037833100",
      "value": 84248000,
      "shares": 400000000,
      "share_type": "SH",
      "investment_discretion": "SOLE",
      "voting_authority_sole": 400000000
    }
  ],
  "period": "2024-Q4",
  "manager_name": "BERKSHIRE HATHAWAY INC",
  "filed_at": "2025-02-14"
}
Compare holdings across quarters: 
curl -H "x-api-key: $OMNI_DATASTREAM_API_KEY" \
  "https://api.secapi.ai/v1/owners/13f/compare?cik=0001067983&period_a=2024-Q3&period_b=2024-Q4"

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Use cases

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Track position changes for top managers

Monitor when the largest hedge funds and asset managers add or exit positions. The compare endpoint surfaces exactly what changed.

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Build a 13F-based stock screener

Screen for stocks that are being accumulated by multiple institutional investors simultaneously. Cross-reference with insider buying for stronger conviction signals.

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Backtest institutional following

Analyze whether stocks with increasing institutional ownership outperform. Use historical 13F data to build and validate strategies.

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Compliance and reporting

Wealth managers and fund administrators can use 13F data to verify holdings disclosures and track competitive positioning.

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API endpoints

EndpointDescription
GET /v1/owners/13fList holdings for a 13F filer
GET /v1/owners/13f/compareCompare holdings between two quarters

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Why Datastream for 13F data

FeatureDatastreamRaw EDGARWhaleWisdomFintel
Structured JSON APIYesNo (XML/SGML)PartialPartial
Quarter-over-quarter diffBuilt-inManualManualManual
Historical coverage1999+1999+2001+2013+
Webhook alertsYesNoNoNo
Python + JS SDKsYesNoNoNo
PricingPay-as-you-goFree (raw)$150+/mo$100+/mo

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Get started

Get your API key

Start pulling 13F data in under 60 seconds.