SEC 13F Institutional Holdings Lookup

x402

SEC 13F Institutional Holdings Lookup is a paid API for AI agents from x402.ottoai.services, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-13).

Returns the latest 13F top-20 positions for any SEC-filing institutional manager (hedge funds, asset managers) identified by CIK number or manager ticker, with amendments applied.

Price / call$0.003

Seller volume →—

Success—

StatusUnknown

How this service works

13F holdings for any SEC-filing manager (hedge funds, asset managers) by CIK or manager ticker: latest 13F top 20 positions, amendments applied (hourly snapshot, ~1h correction lag): issuer, CUSIP, value in whole USD, share/principal amount (SH/PRN), put/call flag, reported value, position count. Whale tracking from the primary source. 13F holdings, hedge fund positions, institutional ownership. Public-domain SEC EDGAR. $0.003 per call.

Output

Returns a structured response with status, meta (including freshness/generatedAt timestamp), and data containing up to 20 13F positions: issuer name, CUSIP, value in whole USD, share or principal amount (SH/PRN type), put/call flag, reported value, and position count. Amendments are applied with approximately 1-hour correction lag on an hourly snapshot.

Example use cases

Example prompt

“Pull the latest 13F top-20 holdings for Berkshire Hathaway — their SEC CIK is 1067983 — so I can see their current institutional positions with values and share amounts.”

Technical details

Endpoint

GEThttps://x402.ottoai.services/institutional-holdings?utm_source=zero.xyz

When to prefer

Use this endpoint when you need authoritative, primary-source institutional holdings data directly from SEC EDGAR 13F filings. Ideal for whale tracking, portfolio analysis, and institutional ownership research where you have a CIK or manager ticker. Prefer this over third-party aggregators when accuracy and direct SEC sourcing matter, and when you need amendment-corrected data rather than raw filings.

Side effects

Invalid or unknown CIK number returns an error or empty result
Manager ticker not recognized or not a publicly-listed filer returns no data
Manager has not filed a 13F (e.g., below $100M AUM threshold) — no holdings returned
Data lag: amendments may take up to ~1 hour to reflect in the snapshot
Rate limiting or payment failure (x402 USDC payment not processed) blocks the call

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "data": {
      "note": "The stock positions this investment manager reported to the SEC on its most recent quarterly Form 13F.",
      "caveats": [
        {
          "code": "hourly_snapshot",
          "plain": "This is an hourly snapshot of SEC filings, not a live feed. Freshness is in the response's generatedAt (and the meta envelope's meta.generatedAt).",
          "affects": [
            "generatedAt"
          ]
        }
      ],
      "filedAt": "2026-05-15",
      "manager": {
        "cik": "1067983",
        "name": "BERKSHIRE HATHAWAY INC"
      },
      "reportDate": "2026-03-31",
      "reportType": "13F HOLDINGS REPORT",
      "generatedAt": "2026-07-10T12:00:00.000Z",
      "methodology": "https://docs.useotto.xyz/acp-swarm/sec-filings-methodology",
      "topHoldings": [
        {
          "cusip": "037833100",
          "issuer": "APPLE INC",
          "putCall": null,
          "quantity": 300000000,
          "valueUsd": 63219884120,
          "quantityType": "SH",
          "titleOfClass": "COM"
        }
      ],
      "amendmentType": null,
      "positionCount": 41,
      "totalValueUsd": 284811220450,
      "amendmentApplied": false,
      "newerNoticeFiledAt": null,
      "confidentialOmitted": false,
      "valuedPositionCount": 41,
      "newerNoticeReportDate": null,
      "valuesNormalizedFromThousands": false
    },
    "meta": {
      "degraded": false,
      "validUntil": "",
      "generatedAt": "",
      "stalenessSec": 0
    },
    "status": "success"
  }
}

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