W

Workers · SEC Institutional Holdings

by Workers

GETBase

$0.03

per call · USD Coin on Base

What an institutional manager actually changed last quarter. Reads 13F-HR filings for a CIK, parses the information table, aggregates by issuer and diffs consecutive quarters into opened, closed, increased and decreased positions with dollar values and portfolio weights. The diff is the signal — a holdings snapshot on its own says nothing about intent.

Endpoint

GET https://x402-filings.datalayer.workers.dev/v1/sec/institutional-holdings

1

Calls / 30d

1

Unique payers / 30d

Aug 17

Last called

exact

Payment scheme

Call this service

TypeScript · @x402/fetch
import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";

const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPay = wrapFetchWithPayment(fetch, account);

const res = await fetchWithPay("https://x402-filings.datalayer.workers.dev/v1/sec/institutional-holdings", {
  method: "GET",
});
const data = await res.json();
cURL
curl -X GET \
  "https://x402-filings.datalayer.workers.dev/v1/sec/institutional-holdings?cik=0001067983&minValueUsd=1000000&quarters=2" \
  -H "X-PAYMENT: <signed x402 payment>"

Example response

{
  "changes": {
    "closed": [],
    "decreased": [],
    "increased": [],
    "opened": [
      {
        "cusip": "30303M102",
        "issuer": "EXAMPLE CORP",
        "shares": 1200000,
        "value": 480000000
      }
    ]
  },
  "currentPeriod": "2026-06-30",
  "holdings": [
    {
      "cusip": "037833100",
      "issuer": "APPLE INC",
      "portfolioPercent": 31.2,
      "shares": 300000000,
      "value": 88000000000
    }
  ],
  "manager": {
    "cik": "0001067983",
    "name": "Berkshire Hathaway Inc"
  },
  "portfolio": {
    "positions": 42,
    "totalValue": 284000000000
  },
  "previousPeriod": "2026-03-31"
}

Payment details

Pay to0x917e635b83f0dd7e8172c55ec4eebb28b734ca85
AssetUSD Coin · 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913
NetworksBase
Schemesexact

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