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Johto Data API – SEC 13F Holdings Lookup
x402
Johto Data API – SEC 13F Holdings Lookup is a paid API for AI agents from johto-x402-api.johtodata.workers.dev, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-28).
Retrieves SEC 13F-HR institutional investment holdings for a fund or manager, ranked by portfolio value, given a CIK number or stock ticker.
Price / call$0.03
Success—
StatusUnknown
How this service works
Valuable data. Quality leads. Paid per call in USDC on Base via x402. Not charged if the fetch fails or nothing matches. Prices per call (USDC): /v1/jp-invoice-check $0.002; /v1/sec-13f $0.003; /v1/sec-8k $0.003; /v1/sanctions-screen $0.0025; /v1/tenders $0.011; /v1/uk-tenders $0.003; /v1/fr-tenders $0.006; /v1/au-contracts $0.0035; /v1/wallet-risk $0.0025; /v1/kyb $0.0029; /v1/read $0.0019; /v1/crawl $0.0045; /v1/jobs $0.01; /v1/domain-profile $0.003.
Output
Returns a paginated array of holdings entries, each containing issuer name, CUSIP, share count, USD market value, percentage of portfolio, report quarter, filing date, filer CIK and name, share type, voting authority breakdown, investment discretion classification, a link to the SEC accession index, and the info table XML URL. Also returns total row count and the timestamp the data was fetched.
Example use cases
Analyze hedge fund equity positions
“What are the top 20 stock holdings reported by Bridgewater Associates in their most recent 13F? I have their CIK as 0001350380.”
Track portfolio concentration by issuer
“Look up Berkshire Hathaway's 13F using ticker BRK-B and tell me what percentage of the portfolio Apple and American Express make up.”
Retrieve specific filing by accession number
“I have a 13F accession number 0001193125-26-352200 — can you pull all the holdings from that specific filing and list them ranked by value?”
Technical details
Endpoint
GEThttps://johto-x402-api.johtodata.workers.dev/v1/sec-13f?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need structured, ranked institutional 13F holdings data for a specific fund — especially when you want to look up by ticker symbol rather than CIK, need pagination over large portfolios, or want per-holding metadata like voting discretion and portfolio percentage. It's billed only on successful data return, making it cost-efficient for exploratory queries. Prefer it over scraping SEC EDGAR directly for speed and structured JSON output.
Side effects
- Invalid or non-existent CIK returns empty data array with rows=0
- Supplying both cik and ticker simultaneously may cause a validation error
- Accession number format mismatch (not matching ^[0-9]{10}-[0-9]{2}-[0-9]{6}$) returns an error
- Fund has not filed a 13F (e.g., manages under $100M threshold) — returns no data
- Offset beyond available holdings count returns empty data
- Payment failure or insufficient USDC balance prevents the call from completing; no charge is applied if fetch fails
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"data": [
{
"rank": 1,
"cusip": "037833100",
"issuer": "APPLE INC",
"shares": 227917808,
"filedAt": "2026-08-15T00:05:04.000Z",
"putCall": null,
"filerCik": "0001067983",
"formType": "13F-HR",
"valueUsd": 65950296923,
"filedDate": "2026-08-14",
"filerName": "BERKSHIRE HATHAWAY INC",
"reportDate": "2026-06-30",
"sharesType": "SH",
"votingNone": 0,
"votingSole": 227917808,
"isAmendment": false,
"accessionUrl": "https://www.sec.gov/Archives/edgar/data/1067983/000119312526352200/0001193125-26-352200-index.htm",
"infoTableUrl": "https://www.sec.gov/Archives/edgar/data/1067983/000119312526352200/56757.xml",
"titleOfClass": "COM",
"votingShared": 0,
"reportQuarter": "2026Q2",
"pctOfPortfolio": 22.04,
"positionsCount": 29,
"accessionNumber": "0001193125-26-352200",
"portfolioValueUsd": 299253556246,
"investmentDiscretion": "DFND",
"otherAmendmentsForPeriod": []
},
{
"rank": 2,
"cusip": "025816109",
"issuer": "AMERICAN EXPRESS CO",
"shares": 151610700,
"filedAt": "2026-08-15T00:05:04.000Z",
"putCall": null,
"filerCik": "0001067983",
"formType": "13F-HR",
"valueUsd": 51282319275,
"filedDate": "2026-08-14",
"filerName": "BERKSHIRE HATHAWAY INC",
"reportDate": "2026-06-30",
"sharesType": "SH",
"votingNone": 0,
"votingSole": 151610700,
"isAmendment": false,
"accessionUrl": "https://www.sec.gov/Archives/edgar/data/1067983/000119312526352200/0001193125-26-352200-index.htm",
"infoTableUrl": "https://www.sec.gov/Archives/edgar/data/1067983/000119312526352200/56757.xml",
"titleOfClass": "COM",
"votingShared": 0,
"reportQuarter": "2026Q2",
"pctOfPortfolio": 17.14,
"positionsCount": 29,
"accessionNumber": "0001193125-26-352200",
"portfolioValueUsd": 299253556246,
"investmentDiscretion": "DFND",
"otherAmendmentsForPeriod": []
}
],
"rows": 2,
"fetchedAt": "2026-10-22T11:56:23.942Z"
}
}Tags
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