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SEC 13F Holdings Lookup by Institutional Manager
x402
SEC 13F Holdings Lookup by Institutional Manager is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-11).
Returns the latest SEC 13F filing holdings for an institutional investment manager (Berkshire, Bridgewater, ARK, etc.) including positions, values, shares, weights, and quarter-over-quarter changes.
Price / call$0.005
Success—
StatusUnknown
How this service works
Holdings an institutional manager reported in its latest SEC 13F (Berkshire, Bridgewater, Renaissance, ARK...): positions with value, shares and weight, total value and changes vs the previous quarter (new, increased, reduced, sold out). Search by manager name or CIK.
Output
A JSON object containing the manager name, CIK, filing date, report date, total portfolio value in USD, number of positions, a list of all holdings (with issuer, CUSIP, share class, shares, USD value, portfolio weight, and quarter-over-quarter change indicator), a list of newly opened positions, a list of fully sold positions with prior share counts, and optional notes about data sourcing.
Example use cases
Tracking Berkshire's portfolio changes
“What stocks did Berkshire Hathaway buy, reduce, or sell completely in their most recent 13F filing? Show me new positions and any fully sold ones.”
ARK Invest top positions by weight
“Get ARK Invest's latest 13F holdings and list their top positions by portfolio weight so I can see what they're most concentrated in.”
Hedge fund lookup by CIK
“Look up the most recent 13F filing for CIK 0001350694 and give me the full list of positions with share counts and USD values.”
Technical details
Endpoint
POSThttps://api.vextorium.com/v1/fund-13f-holdings?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need structured, parsed 13F portfolio data for a specific institutional manager without scraping SEC EDGAR directly. Ideal for agents that need quarter-over-quarter change tracking, position-level detail (shares, value, weight), and new/sold position flags in a single call. Prefer over raw EDGAR access when clean JSON output and change deltas are needed immediately.
Side effects
- Manager name not found or ambiguous — returns null or empty results; use CIK for precision
- CIK not recognized — returns error or empty response
- Filing not yet published — 13F filings can be up to 45 days after quarter end, so most recent quarter may be unavailable
- Rate limit or payment failure — x402 micropayment must succeed before data is returned
- Partial data — some managers may have limited or redacted disclosures
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"cik": "0001067983",
"new": [
"D R HORTON INC"
],
"main": [
{
"class": "COM",
"cusip": "037833100",
"change": "no changes",
"issuer": "APPLE INC",
"option": null,
"shares": 227917808,
"value_usd": 65950296923,
"weight_pct": 22.04,
"previous_quarter_shares": 227917808
},
{
"class": "COM",
"cusip": "025816109",
"change": "no changes",
"issuer": "AMERICAN EXPRESS CO",
"option": null,
"shares": 151610700,
"value_usd": 51282319275,
"weight_pct": 17.14,
"previous_quarter_shares": 151610700
}
],
"note": "Long positions in US securities at quarter end; published up to 45 days later. Not affiliated with the SEC.",
"filed": "2026-08-14",
"source": "SEC EDGAR (formulario 13F-HR)",
"manager": "BERKSHIRE HATHAWAY INC",
"positions": 29,
"fully_sold": [
{
"cusip": "21036P108",
"issuer": "CONSTELLATION BRANDS INC",
"before_shares": 632890
}
],
"report_date": "2026-06-30",
"total_value_usd": 299253556246,
"other_similar_entities": null
}
}Tags
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