stock.owners
2 crread-onlyInstitutional (13F) owners of a stock by ticker — which funds hold it, position value, share count, and the quarter-over-quarter change. The 'who owns this stock' join across all tracked funds.
Parameters#
| Parameter | Type | Description |
|---|---|---|
tickerreq | string | Ticker symbol, e.g. 'AAPL' |
limitopt | number | Max holders (1-500, default 100) |
Example call#
bash
curl -X POST https://arkolith.com/api/mcp \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/call",
"params": {
"name": "stock.owners",
"arguments": {
"ticker": "AAPL"
}
}
}'REST mirror: GET /stocks/{ticker}, metered identically.
Example response#
json
{
"ticker": { "symbol": "AAPL", "name": "APPLE INC", "cusip": "037833100", "sector": "Technology", "exchange": "NASDAQ", "asset_class": "equity" },
"summary": { "institutional_owners": 30, "total_value_usd": 412000000000 },
"owners": [
{
"fund": "BERKSHIRE HATHAWAY INC",
"fund_slug": "berkshire-hathaway-inc",
"cik": "1067983",
"value_usd": 75000000000,
"shares": "300000000",
"change": "REDUCED",
"pct_delta": -14.29,
"share_delta": "-50000000",
"quarter": "Q1 2026"
}
],
"provenance": { "source": "SEC EDGAR 13F", "license": "public domain" }
}