Bosco LabsWhat did Berkshire Hathaway buy and sell last quarter?
Mode holdings13f reads the filer's latest Form 13F-HR, the quarterly list of US equity holdings that institutional managers above $100 million must file. Each row is one holding with issuer_name, cusip, ticker, shares, value_usd and portfolio_pct, and the change against the previous quarter (previous_shares, shares_change, shares_change_pct and a change label such as increased). Each row links the 13F filing it comes from.
Tool input
{
"mode": "holdings13f",
"filer": "Berkshire Hathaway",
"maxResults": 50
}Ask it from an AI agent (MCP)
Add the Apify MCP server with this tool to your MCP client (Claude, Cursor, VS Code, ...); it signs you in with OAuth or Authorization: Bearer <APIFY_TOKEN>. It works once the Actor is live on the Apify Store.
https://mcp.apify.com?tools=bosco_labs/sec-ownershipThen ask:
Use the bosco_labs/sec-ownership tool to answer: What did Berkshire Hathaway buy and sell last quarter?Call the Apify API
Runs the Actor and returns the rows in one request, billed to your Apify account ($0.0018 per row). It works once the Actor is live on the Apify Store.
curl https://api.apify.com/v2/acts/bosco_labs~sec-ownership/run-sync-get-dataset-items \
-H "Authorization: Bearer $APIFY_TOKEN" \
-H "Content-Type: application/json" \
-d '{"mode": "holdings13f", "filer": "Berkshire Hathaway", "maxResults": 50}'Example output
Example output from the tool's documentation (not a run of this exact question).
{
"record_type": "holding",
"filer_name": "BERKSHIRE HATHAWAY INC",
"filer_cik": "0001067983",
"period_of_report": "2026-06-30",
"form": "13F-HR",
"filing_date": "2026-08-14",
"issuer_name": "ALPHABET INC",
"title_of_class": "CAP STK CL A",
"cusip": "02079K305",
"ticker": "GOOGL",
"ticker_candidates": [],
"put_call": null,
"shares": 78791167,
"share_type": "SH",
"value_usd": 28157599351,
"portfolio_pct": 9.41,
"previous_period": "2026-03-31",
"previous_shares": 54249798,
"previous_value_usd": 15600071913,
"shares_change": 24541369,
"shares_change_pct": 45.24,
"change": "increased",
"filing_url": "https://www.sec.gov/Archives/edgar/data/1067983/000119312526352200/0001193125-26-352200-index.htm",
"source": "edgar-13f",
"source_url": "https://www.sec.gov/Archives/edgar/data/1067983/000119312526352200/56757.xml"
}