Sec Fund Holdings

{
  "accession_number": "0001193125-26-352200",
  "biggest_adds": [],
  "biggest_cuts": [],
  "compared_to": {
    "filed": "2026-05-15",
    "report_period": "2026-03-31",
    "total_value_usd": 287000000000
  },
  "disclaimer": "13F reports are filed up to 45 days after quarter-end and list long US equity positions only (no shorts, cash or non-US holdings). Not investment advice.",
  "filed": "2026-08-14",
  "filing_url": "https://www.sec.gov/Archives/edgar/data/1067983/000119312526352200/0001193125-26-352200-index.htm",
  "fund": {
    "cik": "1067983",
    "name": "BERKSHIRE HATHAWAY INC"
  },
  "holdings": [
    {
      "change": "unchanged",
      "cusip": "037833100",
      "issuer": "APPLE INC",
      "pct_of_portfolio": 21.39,
      "put_call": null,
      "rank": 1,
      "share_type": "SH",
      "shares": 280000000,
      "shares_change": 0,
      "shares_change_pct": 0,
      "title_of_class": "COM",
      "value_usd": 64000000000
    }
  ],
  "new_positions": [],
  "next_calls": [
    {
      "arguments": {
        "company": "APPLE INC"
      },
      "price": "$0.03",
      "tool": "company_dossier",
      "why": "A due-diligence read on Apple Inc, the largest holding."
    }
  ],
  "other_matches": [],
  "positions": 41,
  "report_period": "2026-06-30",
  "sold_out": [],
  "source": "sec-edgar",
  "summary": "BERKSHIRE HATHAWAY INC reported 41 positions worth $299.3B as of 2026-06-30 (13F filed 2026-08-14). Largest: Apple Inc 21.4%, American Express Co 15.9%, Bank of America Corp 10.3%, Coca Cola Co 9.1%, Chevron Corp New 6.2%. (Example figures.)",
  "total_value_usd": 299253556246
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://x402-agent-api.onrender.com/api/v1/sec-fund-holdings' \
  -H 'content-type: application/json' \
  --data-raw '{"fund":"Berkshire Hathaway","limit":5}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://x402-agent-api.onrender.com/api/v1/sec-fund-holdings' \
  -H 'content-type: application/json' \
  --data-raw '{"fund":"Berkshire Hathaway","limit":5}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fx402-agent-api.onrender.com%2Fapi%2Fv1%2Fsec-fund-holdings&method=POST
const res = await pay("https://x402-agent-api.onrender.com/api/v1/sec-fund-holdings", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "fund": "Berkshire Hathaway",
    "limit": 5
  }),
});
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://x402-agent-api.onrender.com/api/v1/sec-fund-holdings",
        json={
            "fund": "Berkshire Hathaway",
            "limit": 5,
        },
    )
    print(res.status_code, res.text)